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highboostingm3
08-18-2004, 04:07 PM
I already have an LSD. I need to change the gears to 2.79. Where can I purchase the gears to install?

Thanks,
Cameron

///3oris
08-18-2004, 04:14 PM
I already have an LSD. I need to change the gears to 2.79. Where can I purchase the gears to install?

Thanks,
Cameron

Cameron, I thought you were going with a 2.93? What happened to that?

Sorry, I don't know where to get gears :(

Boris

highboostingm3
08-18-2004, 04:20 PM
Cameron, I thought you were going with a 2.93? What happened to that?

Sorry, I don't know where to get gears :(

Boris

I have been on the fence. I might get more power than I think out of my car. I don't want to wish later that I got the 2.79 if I get the 2.93. :help

Mikea
08-18-2004, 04:35 PM
Go with the 2.79 I wish I went with it instead of 2.93 especially if you plan to go more HP later it will be sluggeish in low RPM but once your in boost its worth every penny spent, the gears seem to last forever feels great and powerful(its big rush).

Contact Jim Blanton

Blanton Transmissions
1427 West 9th Street
Kansas City, MO 64101
816-221-8584

jblanton@sky.net

///3oris
08-18-2004, 05:11 PM
Mike, you know you can always sell your 2.93 and get a 2.79.... someone might want a 2.93 LSD... *ahem* ;)

Boris

highboostingm3
08-18-2004, 06:45 PM
Go with the 2.79 I wish I went with it instead of 2.93 especially if you plan to go more HP later it will be sluggeish in low RPM but once your in boost its worth every penny spent, the gears seem to last forever feels great and powerful(its big rush).

Contact Jim Blanton

Blanton Transmissions
1427 West 9th Street
Kansas City, MO 64101
816-221-8584

jblanton@sky.net

Thanks for the info. That "sluggish" comment kinda worries me but overall it sounds like 2.79 is the ticket.

slvr98 M
08-18-2004, 08:02 PM
Tom Bleh just completed building a 2.93 open diff to a 2.93 LSD with 47% lockup. I got it out of a 328 and is holding up nicely. The 2.79 is a nice setup too even though I havent driven one, but for my preferences the 2.93 is perfect.

///3oris
08-18-2004, 08:35 PM
Tom Bleh just completed building a 2.93 open diff to a 2.93 LSD with 47% lockup. I got it out of a 328 and is holding up nicely. The 2.79 is a nice setup too even though I havent driven one, but for my preferences the 2.93 is perfect.

At what point (rwhp/tq) would you say is a good "switchover" point from a 3.23 to a 2.93? I'm considering getting the diff, but my only problem is the cost involved (LSD installation).

George is trying to convince me that I should go to 2.93 and I'm sure it'll make the first two gears more driveable (especially first!), etc... but I'm worried about top end. Can you offer any suggestions?

Thanks,

Boris

gol10dr1
08-18-2004, 08:43 PM
hit up diffsonline.com. they will build you any gear ratio with any lockup that you want. they sponsor some bmw racers that i know and i have heard nothing but high praise of them.

///3oris
08-18-2004, 08:47 PM
Yeah, but did you see the prices? :( Considering how much a regular 2.93 diff can be had for, it's SOO expensive to add LSD... :(

Boris

highboostingm3
08-18-2004, 08:57 PM
Actually I have the LSD with 40% and all. I just need to buy the gears themselves. My tuner will install them. Where can I just buy the set of gears?

slvr98 M
08-18-2004, 11:32 PM
At what point (rwhp/tq) would you say is a good "switchover" point from a 3.23 to a 2.93? I'm considering getting the diff, but my only problem is the cost involved (LSD installation).

George is trying to convince me that I should go to 2.93 and I'm sure it'll make the first two gears more driveable (especially first!), etc... but I'm worried about top end. Can you offer any suggestions?

Thanks,

Boris

When I had my stage 2 turbo TD06, 360rwhp/375tq, the 3.23 worked out fine for me. The diff gave me enough torque throughout the RPM range which didnt allow the turbo to run out of breath too soon and also gave me good power in the low end. The T61 needs a 2.93 or 2.79 depending on what you want to allow you to utilize the full potential of the turbo.

Why dont you try a 3.15 first and see how you like it and if that doesnt work out for you consider something else.

///3oris
08-18-2004, 11:47 PM
Why dont you try a 3.15 first and see how you like it and if that doesnt work out for you consider something else.

Thanks a lot for your answer.

To answer your question: because I don't have a trust fund ;)

Boris

DakarDave
08-18-2004, 11:49 PM
BMW no longer offers single parts off their diffs.. well at least not to the public....

HOWEVER

if you know the part numbers, you can still order the individiuals parts - in your case you need the part numbers for ring and pinions..

for example... I have the Ring and Pinion part number for the 3.73 .... (33 12 1 210 028
)

Find a local BMW parts guru.. buy him a six pack of beer and get him to get you the part number... that's how you can get the individual diff parts.. :)

slvr98 M
08-18-2004, 11:58 PM
Well you dont really need a trust fund just a swap from a 95 M3. Alot of guys are looking for 3.23 and may be willing to trade with you.

DakarDave
08-19-2004, 12:00 AM
I have a 3.15 sitting at home, boris... but its a E30 - E36 z3/mz3 diff.... or else, I would let you try it out :(

///3oris
08-19-2004, 12:01 AM
Well you dont really need a trust fund just a swap from a 95 M3. Alot of guys are looking for 3.23 and may be willing to trade with you.

Great point, thank you :)


I have a 3.15 sitting at home, boris... but its a E30 - E36 z3/mz3 diff.... or else, I would let you try it out :(

:(

Boris

EMC
08-19-2004, 12:32 AM
At what point (rwhp/tq) would you say is a good "switchover" point from a 3.23 to a 2.93? I'm considering getting the diff, but my only problem is the cost involved (LSD installation).

George is trying to convince me that I should go to 2.93 and I'm sure it'll make the first two gears more driveable (especially first!), etc... but I'm worried about top end. Can you offer any suggestions?

Thanks,

Boris

I've done the math before and taking tire size and RPM range into account, the viper is around a 2.5X and the Z06 is around a 2.6X final drive ratio when using their 5th gear. I've got a spread sheet made up somewhere at work and it makes a more apples to apples comparison by taking into account several factors.

The only thing that stopped me from doing the 2.79 (or lower yet) instead of the 2.93 was the fact that the vette and viper have plenty of low end torque. Thats something we don't have, even with a turbo or twin screw. Maybe someday I'll try out the 2.79, but for what I want, the 2.93 with 55% lockup should be plenty good. Heck, just the increase in lockup should help out a lot off the line.

You could always put some 245/75/17's on there. I have a couple old tires from my truck that you could use. Just pay the shipping. :stickoutt

OZ3M
08-19-2004, 12:37 AM
400RWHP+ 2.79
under that 2.93

around 300 rwhp stay stock...

EMC
08-19-2004, 12:39 AM
I already have an LSD. I need to change the gears to 2.79. Where can I purchase the gears to install?

Thanks,
Cameron

Buy an E30 diff or an older 5 series diff with limited slip and a 2.79 gear set (I forget which ones are common).

It's a lot more work than just putting in a set of gears. Everything is shimmed, and I believe that the limited slip unit housing is machined or shimmed as well based on the gear set.

If possible, get Tom Bleh to help you out. I'm guessing that he's busy racing, but he might take some time to build you a diff. He also uses new clutches and bearings if needed. Very thorough individual.

OZ3M
08-19-2004, 12:42 AM
I've done the math before and taking tire size and RPM range into account, the viper is around a 2.5X and the Z06 is around a 2.6X final drive ratio when using their 5th gear. I've got a spread sheet made up somewhere at work and it makes a more apples to apples comparison by taking into account several factors.

The only thing that stopped me from doing the 2.79 (or lower yet) instead of the 2.93 was the fact that the vette and viper have plenty of low end torque. Thats something we don't have, even with a turbo or twin screw. Maybe someday I'll try out the 2.79, but for what I want, the 2.93 with 55% lockup should be plenty good. Heck, just the increase in lockup should help out a lot off the line.

You could always put some 245/75/17's on there. I have a couple old tires from my truck that you could use. Just pay the shipping. :stickoutt

lowend torque...what are you going to do pull a boat? :lol

slvr98 M
08-19-2004, 12:42 AM
Go to bed Omar.....

OZ3M
08-19-2004, 12:44 AM
Go to bed Omar.....

cant help it man... :)

EMC
08-19-2004, 12:54 AM
lowend torque...what are you going to do pull a boat? :lol

It's mostly about around town driveability. You won't see an S2000 or and RX8 geared with a 2.5X ratio because you would really have to watch your revs every time you took off from the stop light. With the viper, you can side step the clutch at idle and it will move right along...just like a diesel truck. I.E. its like starting from 2nd gear everytime. ;)

ICS Performance
08-19-2004, 08:02 AM
I already have an LSD. I need to change the gears to 2.79. Where can I purchase the gears to install?

Thanks,
Cameron
Call Karl @ AA he has a 2.79 diff, with a 40% lock up, give him a call, I believe it is still available. :)

highboostingm3
08-19-2004, 01:39 PM
400RWHP+ 2.79
under that 2.93

around 300 rwhp stay stock...

Thank you! I am going for 550whp Mustang dyno eventually so that's what I needed.


Call Karl @ AA he has a 2.79 diff, with a 40% lock up, give him a call, I believe it is still available.

Thanks a ton George! I hope that he has it. It's a shame that I would have to buy the entire thing but it looks like going the other route is just a mess. Hopefully somebody will want my 3.46/40%LSD that I have now(don't ask!). It'll go on ebay soon.

///3oris
08-19-2004, 01:41 PM
Cameron, I might be interested in it... please contact me before it goes on eBay!

Thanks,

Boris

highboostingm3
08-19-2004, 01:48 PM
Cameron, I might be interested in it... please contact me before it goes on eBay!

Thanks,

Boris

No worries Boris, but don't think that just because of that "I don't have a trust fund" comment I am going to give it to you for next to nothing. :lol

///3oris
08-19-2004, 01:50 PM
No worries Boris, but don't think that just because of that "I don't have a trust fund" comment I am going to give it to you for next to nothing. :lol

D'oh! :(

I'm sure we can work something out... and if not, then I'll outbid everyone for a lower price on eBay... :stickoutt

Boris

highboostingm3
08-19-2004, 02:48 PM
D'oh! :(

I'm sure we can work something out... and if not, then I'll outbid everyone for a lower price on eBay... :stickoutt

Boris

I was just BYB. I actually am a very generous guy. I am not very greedy. We can work something out.

Vader M3
08-19-2004, 04:45 PM
I went from 3.15 to 2.79 when I was around 360whp. Let me tell you I hated it. I felt like I had to run full boost all the time if I was going to enjoy it. So I went back.

I will say that if you are concerned with 1st and 2nd gear acceleration then it is awesome. But you drop considerally more revs going into each gear, making it feel considerably slower. I also felt it had a dangerous top speed, and I was worrying about tickets from the deceivingly low revs at high speed. I think at 100mph I was around 3500rpm, and top speed is over 180mph (I didn't try 180).

If your concern is more from 50-150mph then stay with 3.15 or at least 2.93, this would be more for the highway or roadrace guys. Drag race guys will benefit from the 2.79 but I changed it back since it's just not my thing.
I think the ultimate would be a 2.93 diff with a reworked 6-speed tranny made to be much taller in first and considerably taller in 2nd gear. The Euro six-speed is a little taller in these two cars I believe.

I wouldn't go 2.93 unless I were over 430whp, and I wouldn't go 2.79 unless I were over a constant 490whp for sure, but then we'd also have to make sure the turbo isn't laggy enough to not be in boost going into each upshift. Again this being that I'm concerned with my 50mph-on acceleration, not 0-xx times. Otherwise, I think Omar's speed breaks sound about right, that is if you're concerned with winning a race from 1st and 2nd gear for an optimum 0-60mph or 1/4mile. I think it will hurt everywhere else unless you're breaking the wheels lose in 3rd all the time, and I definitely don't have that problem at 400+whp with 255's in the rear.

jimmyz2
08-19-2004, 06:56 PM
lowend torque...what are you going to do pull a boat? :lol
:lol ...No,I believe he is going to get his car up and moving quickly,before the turtle passes him. :)

525iT_Feen
08-20-2004, 01:12 AM
I didn't read the whole thread but has diffs-online been mentioned yet?

slvr98 M
08-20-2004, 09:56 AM
I didn't read the whole thread but has diffs-online been mentioned yet?

Yes they have.

OZ3M
08-20-2004, 02:14 PM
OK here is the deal, you need to look at the total gearing when you are talking about rearend upgrade. Here is a quick comparison of 2.79 vs 2.93 and stock Porsche GT2 with a rearend of 3.44 redline 6750.

GT2 2.79 2.93
1st 3.82 overall 13.14 11.74 12.33
2nd 2.05 overall 7.05 6.94 7.29
3rd 1.41 overall 4.85 4.63 4.86
4th 1.12 overall 3.85 3.45 3.63
5th 0.92 overall 3.16 2.79 2.93
6th 0.75 overall 2.58

GT2 specs 477HP 472TQ (not rwhp)
I will assume it will be 350-360 rwhp.

I still suggest over 400RWHP you need to go with 2.79... :)

ICS Performance
08-20-2004, 02:41 PM
OK here is the deal, you need to look at the total gearing when you are talking about rearend upgrade. Here is a quick comparison of 2.79 vs 2.93 and stock Porsche GT2 with a rearend of 3.44 redline 6750.

GT2 2.79 2.93
1st 3.82 overall 13.14 11.74 12.33
2nd 2.05 overall 7.05 6.94 7.29
3rd 1.41 overall 4.85 4.63 4.86
4th 1.12 overall 3.85 3.45 3.63
5th 0.92 overall 3.16 2.79 2.93
6th 0.75 overall 2.58

GT2 specs 477HP 472TQ (not rwhp)
I will assume it will be 350-360 rwhp.

I still suggest over 400RWHP you need to go with 2.79... :)
I havent tried the 2.79 but I really like the 2.93, it makes sense the higher the horsepower of the car the lower numetrical differential is needed. 400WHP still like the 2.93, the cars I do are full body M3's with full interior system and all weighing probably 3500 with driver. But like I said I have not tryed the 2.79 yet. :)

highboostingm3
08-20-2004, 03:25 PM
:confused I appreciate all the help! I am still wondering however. My intellect tells me to go with what has been already proven. That would be the 2.93. I mean has anyone tried the 2.79? I haven't seen anyone come forth that has actually had it in their car.

George has made more power than I ever will with his friend's M3. George, if the 2.93 works really well in that car...then I guess it will do.

ICS Performance
08-20-2004, 03:42 PM
:confused I appreciate all the help! I am still wondering however. My intellect tells me to go with what has been already proven. That would be the 2.93. I mean has anyone tried the 2.79? I haven't seen anyone come forth that has actually had it in their car.

George has made more power than I ever will with his friend's M3. George, if the 2.93 works really well in that car...then I guess it will do.
I really like it, I recomend it to anyone @ even 350+ whp, or those with smaller turbo's that die off on topp, this is a great mod, with longer gears helps spool the turbo in the lower gears like 1st and 2nd where they barely make boost till high RPM and then run out of breath. Thats why I recomend the 2.93 more load, build boost sooner, longer pull = faster acceration. Less tire spin. :)

highboostingm3
08-20-2004, 04:31 PM
I really like it, I recomend it to anyone @ even 350+ whp, or those with smaller turbo's that die off on topp, this is a great mod, with longer gears helps spool the turbo in the lower gears like 1st and 2nd where they barely make boost till high RPM and then run out of breath. Thats why I recomend the 2.93 more load, build boost sooner, longer pull = faster acceration. Less tire spin. :)

OK OK. Looks like the 2.93 is the call. (Sorry Omar)

mrdoenutz
08-20-2004, 09:52 PM
get in touch with tom bleh, he did mine.

OZ3M
08-21-2004, 03:12 AM
OK OK. Looks like the 2.93 is the call. (Sorry Omar)

No problems...you will not be too far off with a 2.93...good luck. :)

CRISTIAN
08-21-2004, 06:00 PM
GT2 specs 477HP 472TQ (not rwhp)
I will assume it will be 350-360 rwhp.

I still suggest over 400RWHP you need to go with 2.79... :)

477crank HP equal with 400whp anytime. The looses are not too big especially for Porshes trany and the size of porsche shaft. Also the loss coeficient is not liniar in any situation.

I bet also on the 2.93 diff for a turbo M3 with 400whp+.

OZ3M
08-22-2004, 02:26 AM
477crank HP equal with 400whp anytime. The looses are not too big especially for Porshes trany and the size of porsche shaft. Also the loss coeficient is not liniar in any situation.

I bet also on the 2.93 diff for a turbo M3 with 400whp+.

400 whp on dynojet maybe...stock M5 on mustang 310-315...

If you want to bet I am ready for it 400+RWHP (mustang dyno) 2.93 vs 2.79 from a stop or from a roll you name it lets say up to 140-150...

:lol

OZ3M
08-22-2004, 03:14 AM
OK OK. Looks like the 2.93 is the call. (Sorry Omar)

I just noticed that you are going for 550whp (mustang)...2.93 is going to be short... :eyecrazy

CRISTIAN
08-22-2004, 04:17 AM
Lets bet :D But can we found two 400whp turbo cars?

Anyway, for a real 550whp engine, I do intend to believe in the 2,79 combination. Such levels of power transform your car in to an ON/OFF machinery... anyway part throttle doesn't exist anymore for such an engine or exist in some annoying forms... and you will push the pedal strong every time you move your car from a light in traffic condition... it will be very hard to use the car in traffic because at part throttle the car don't have enough power... but like I said... it's just a ON/OFF race machinery so if it will not be used on the street then worth 2.79.

stimpee
08-22-2004, 09:45 AM
Cristian,

I disagree quite a bit with your statements.

Even thought I constantly discuss my feelings on the "non-linearity" of turbo power delivery, etc, there is NO reason why a 500-600 whp car can be built with a turbo and still have it be a pleasant vehicle in town/traffic, etc.

If it responds as an on/off switch, then the builder/tuner doesn't have a clue what they are doing IMHO...

Steve

ICS Performance
08-22-2004, 10:43 AM
400 whp on dynojet maybe...stock M5 on mustang 310-315...

If you want to bet I am ready for it 400+RWHP (mustang dyno) 2.93 vs 2.79 from a stop or from a roll you name it lets say up to 140-150...

:lol
So you also agree @ least 50 min dynojet over mustang, and dynomyte I try explaining myself tp certain people but they dont understand since they have not expirienced it, they claim maybe 15 I tell them they are crazy. But you have expirieced to, care to give your thoughts too. :)

EMC
08-22-2004, 11:03 AM
400 whp on dynojet maybe...stock M5 on mustang 310-315...

If you want to bet I am ready for it 400+RWHP (mustang dyno) 2.93 vs 2.79 from a stop or from a roll you name it lets say up to 140-150...

:lol

I agree. My car made 360rwhp on a Mustang Dyno and 412rwhp on a DynoJet. There's a huge difference no matter what DynoJet you are using. Calibrators at my work that travel and spend a lot of time at different dynos have told me that "while they don't like the lower numbers that the Mustang Dynos put out, they are very consistent". I'm talking about guys that spend 6 or more hours at the dynos EVERY DAY!

ICS Performance
08-22-2004, 11:16 AM
I agree. My car made 360rwhp on a Mustang Dyno and 412rwhp on a DynoJet. There's a huge difference no matter what DynoJet you are using. Calibrators at my work that travel and spend a lot of time at different dynos have told me that "while they don't like the lower numbers that the Mustang Dynos put out, they are very consistent". I'm talking about guys that spend 6 or more hours at the dynos EVERY DAY!
Another well educated man, thank you for responding, you have also expirienced too. :)

CRISTIAN
08-22-2004, 02:03 PM
Guys, I'm so amazed and exhausted about all those problems between dynojet and mustang... I think I read thousands of threads... and indeed is a big difference between those two dyno but theoretical must be a wrong calibration for one dyno... because one car can't have a different power loss on two dynos... This think can't be contradicted by nobody who understand simple laws of physic. But finally, practically I will agree with you guys that is a big difference between mustang and dynojet with the reserve that one dyno is clear technical overpassed and can't be calibrated enough good.

CRISTIAN
08-22-2004, 02:56 PM
The physic difference is that Mustang show you the maxim large loss of your trany loaded in similar road conditions. The dynojet is like you rev your car at idle... what loss can be... indeed much smaller... The friction from the trany is smaller if the trany is not loaded hard like on the street. But who can give an ultimate answer about what dyno is more useful??? On the Mustang if you have a brand new M5 with full options and navigation tvs on all your seats it will develop 310whp and a light version M5 will develop 340whp... Hmmm... The technical advance of the Mustang can induce in error many tuners... for example the client just installed a new dolby digital system and some luxury heavy wheels and next day found that don't have the claimed power... :stickoutt Deal with that :D

OZ3M
08-22-2004, 07:49 PM
Lets bet :D But can we found two 400whp turbo cars?

Anyway, for a real 550whp engine, I do intend to believe in the 2,79 combination. Such levels of power transform your car in to an ON/OFF machinery... anyway part throttle doesn't exist anymore for such an engine or exist in some annoying forms... and you will push the pedal strong every time you move your car from a light in traffic condition... it will be very hard to use the car in traffic because at part throttle the car don't have enough power... but like I said... it's just a ON/OFF race machinery so if it will not be used on the street then worth 2.79.

You are way off...come to Miami and I will let you drive my car...my wife drives my car, takes it to the gym and mall, etc. and boosts it too...by far it is not an ON/OFF machine... :lol

BTW, do not bother arguing the dyno differences, it is there...the horse is :eyecrazy dead...

stimpee
08-22-2004, 09:42 PM
I agree. My car made 360rwhp on a Mustang Dyno and 412rwhp on a DynoJet. There's a huge difference no matter what DynoJet you are using. Calibrators at my work that travel and spend a lot of time at different dynos have told me that "while they don't like the lower numbers that the Mustang Dynos put out, they are very consistent". I'm talking about guys that spend 6 or more hours at the dynos EVERY DAY!

No no, say it isn't true!! Boris said so!!!


:lol :lol :lol

Sorry Boris, bustin your chops once again!!

So does this mean I can expect 275+ on my car on a Dynojet? I will find out soon!!!



Steve

ICS Performance
08-22-2004, 10:02 PM
No no, say it isn't true!! Boris said so!!!


:lol :lol :lol

Sorry Boris, bustin your chops once again!!

So does this mean I can expect 275+ on my car on a Dynojet? I will find out soon!!!



Steve
Good luck, make sure you call me tomorrow. :)

///3oris
08-22-2004, 10:28 PM
No no, say it isn't true!! Boris said so!!!

Did I miss something, Steve?? Clue me in, as I've been away the entire weekend.

Boris

stimpee
08-22-2004, 10:33 PM
The dead horse of Dynojet vs Mustang dyno reading has reared its head again, and I know your position, so I started busting on you before you even had a chance to chime in...

:D

Steve

///3oris
08-22-2004, 10:37 PM
The dead horse of Dynojet vs Mustang dyno reading has reared its head again, and I know your position, so I started busting on you before you even had a chance to chime in...

:D

Steve

And what is my position? :confused

Boris

stimpee
08-22-2004, 10:40 PM
My experience with you is that you dispute that there is any significant difference between the two, unless the Mustang has been inappropriately setup.

Unless I am remembering incorrectly...

Steve

///3oris
08-22-2004, 10:49 PM
My experience with you is that you dispute that there is any significant difference between the two, unless the Mustang has been inappropriately setup.

Unless I am remembering incorrectly...

Steve

I don't remember that being my position as of late... ESPECIALLY after our discussion about it (I don't know if it was, although possible). I agree that there's a difference, in fact, there are differences between the different Dynojets you could go to (read the SCC article on Dynoing)... my opinion is that it's 'incorrect' to assume a specific difference between a Dynojet and a Mustang across the board. Some people say the drivetrain loss on a Dynojet is 21% on a Mustang it's really 10% more. I don't agree with this as there's no sample to prove this statement. I've seen where there was a HUGE spread between a Mustang and a Dynojet and on the other hand I've seen instances where they're almost identical. I would say it just 'depends' on too many factors, including the inputs used on a Mustang as that one is much more suseptible to different readings due to the user input.

Now, having said all that... I'm still with Cristian... physics is physics no dyno can change that... what the machine tells you might be different, but you're not making different power or have different drivetrain loss no matter which Dynamometer you're on. Who knows which is the more accurate, although theoretically the Dynojet is the more accurate of the two and more consistent. I also recall Jim Conforti saying something about a test he did to compare his Dynojet to a Bosch Dynamometer and the readings were within 2-3rwhp of each other.

So, since this is such a subjective subject and unless someone invests some huge money to take a great sample and also go on an engine dyno to show the corralation between the dynamometers it'll forever be an open debate.

That's my opinion... right or wrong.

Boris

stimpee
08-22-2004, 10:54 PM
Actually, I MAY disagree that the POWER made on the different dynos is not different. As I said in a past thread, the Mustang creates a different LOAD than the dynojet. Since it does, it MAY result in different power actually being generated by the car/engine...

At the end of the day though, you are right in that I don't believe the drivetrain loss magically changes, just the actual "measured" value due to the way the measurement is made, and the load that the dyno creates on the vehicle...

I didn't realize that our discussion actually resulted in any possible change in point of view.

My bad...

Anyway, just busting on you, as usual!!

:D

Steve

///3oris
08-22-2004, 11:30 PM
Anyway, just busting on you, as usual!!

Understood :)

Boris

///3oris
08-23-2004, 01:57 AM
Hey Steve, I was just searching for something (different) and ran across this very old thread which is probably the best 'argument' for the whole Mustang vs. Dynojet 'controversy.'

http://forums.bimmerforums.com/forum/showthread.php?t=38294

Anyway, sorry to keep going off topic, I'm done now... lets start a new thread if we need to discuss further.

Thanks,

Boris

highboostingm3
08-23-2004, 04:00 AM
Poor horsie! :(

Well, since it is not a crazy expense to change differential setups, I figure hey...it may be a long time before I make 550whp on any dyno machine... therefore, I will stick with getting the 2.93 for now. I really appreciate all your guys' help as usual! Hopefully the day will come where I am making enough power to justify a 2.79. Then on that day, I will swap in the 2.79. :)

ledlum
08-29-2004, 07:06 PM
So is there anyone on this board running a 2.79 rear?

ICS Performance
08-29-2004, 08:22 PM
So is there anyone on this board running a 2.79 rear?
Omar is running a 2.79 in his M coupe.
How did you enjoy the ride Yesterday. :)

ledlum
08-29-2004, 09:18 PM
Omar is running a 2.79 in his M coupe.
How did you enjoy the ride Yesterday. :)

That car is scary fast and it is not even running right :eek: With the power output that I want I am not sure about the rear end. I love the feel of the 2.93. I am not into all out top speed, so I don't think the 2.79 is for me. I want something with a strong mid range.

ICS Performance
08-29-2004, 09:54 PM
That car is scary fast and it is not even running right :eek: With the power output that I want I am not sure about the rear end. I love the feel of the 2.93. I am not into all out top speed, so I don't think the 2.79 is for me. I want something with a strong mid range.
It will be re-tuned on Thursday, and ready tp rock and roll, some changes where made and need to be re-tuned.

OZ3M
08-29-2004, 10:52 PM
I love the feel of the 2.93. I am not into all out top speed, so I don't think the 2.79 is for me. I want something with a strong mid range.

I guess I need to make another video... :lol

ledlum
08-29-2004, 10:56 PM
I guess I need to make another video... :lol

Hey Omar,
How does your car feel when you are driving around the city? (no boost) I don't know much about the 2.79 setup. I just know you can go like 200 mph :eek:

highboostingm3
08-29-2004, 10:57 PM
I guess I need to make another video... :lol

So you have the 2.79 then? I didn't know. What are you making at the wheels right now? If you don't mind me asking. Hmmmmmm...back & forth I go.

ledlum
08-29-2004, 10:59 PM
Another question what gear ratio did you start with?

ledlum
08-29-2004, 11:00 PM
So you have the 2.79 then? I didn't know. What are you making at the wheels right now? If you don't mind me asking. Hmmmmmm...back & forth I go.

I feel the same way, I wish I could ride in a car with a 2.79 rear

slvr98 M
08-29-2004, 11:51 PM
I dont think Omar is going to answer the HP question at this time.

OZ3M
08-30-2004, 12:57 PM
Hey Omar,
How does your car feel when you are driving around the city? (no boost) I don't know much about the 2.79 setup. I just know you can go like 200 mph :eek:

It feels pretty good to me... :)