My Supercharger story.

[8eights]

I'd like to see a E31 do 190 and all 4 stay on the ground!--)

[Noggie]

I'd like to see a E31 do 190 and all 4 stay on the ground!--)

had mine at 168mph in September in Germany... still pulling strong.
With the SC I'll run out of rev's before I run out of grunt.

I would like to see the magical 300kph (184mph) though.... might have to raise my redline to 6200 or 6400rpm to make that happen.

[mjrgroup]

had mine at 168mph in September in Germany... still pulling strong.
With the SC I'll run out of rev's before I run out of grunt.

I would like to see the magical 300kph (184mph) though.... might have to raise my redline to 6200 or 6400rpm to make that happen.

I want to see an 850 hit 200mph.


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[Noggie]

I want to see an 850 hit 200mph.


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Then you need a 3.15 diff and a SC or TT.

A stock 850 will run out of grunt at about 270kph/168mph.
with the modifications Hartge did to my car 354hp/470nm and the 3.45 diff they put the new top speed at 280kph/174mph.

A CSI is able to reach 185mph before it runs out of grunt, and that takes "forever" to reach.

The 507hp M5 and M6 will do 205mph, and I would assume the e31 would need similar power figures to be able to reach such speeds.
When I get my SC system perfected I think it would be theoretically possible for my car to hit 200mph if I change to a 3.15 diff.
Not sure the car would handle very well at those speeds though.

[mjrgroup]

M-tech/CSi front bumper, rear diffuser and mirrors will help.

What do you mean by handling? At that speed the only handling concerns I would are staying on the road and avoiding disaster.

What about suspension for a speed like that. I imagine that you wouldn't want a suspension setup that's too firm because it wouldn't be as forgiving for small imperfections in the road. Would stock Boge shocks/strut inserts be more adequate for this task than bilstein's, for example? Others here have input?

[Cadillacwill]

the stock gearing with the six speed which uses a 2.85 rear diff I believe gives a top speed of 200 mph according to the e31 facts page or whatever it is. So using a TT setup/ overdrive SC setup I could theoretically go 200 mph

[sleepy81]

I imagine that you wouldn't want a suspension setup that's too firm because it wouldn't be as forgiving for small imperfections in the road.

The higher the speed, the firmer.

[tonys]

With firebird's remapping I hit 275kph in my M73 with CSi areo kit and 3.15 LSD. Rock solid and there was more to go...just ran out of clear road.



Tony

[Noggie]

I have done quite a bit of high speed driving, and if the aerodynamics are not right, and the suspension is not firm enough the car will start to bob up and down like a boat.

It is usually hard to find a perfectly straight piece of road long enough to reach such speeds and taking even the sleekest bend at those speeds with a car that is bobbing up and down like a boat is exciting to say the least.

In 2007 I drove my 850 to 260kph with a shot stock suspension, bad bushings and worn steering..... I almost shit my pants, the car was perfect in 240, decent in 250, but in 260 it was terrible.

In September I did 270 with worn TA bushings.... not quite as bad as last time, but still not good. Could have reached much higher speeds, but I had a CSI in front of me so I had to stop. I have the Eibac/Bilstein suspension upgrade done since last, with camberplates.

I also realize that the CSI bodykit is a must have for high speed driving.
The front gets too little downforce, and the air stream under the car needs to be improved, the rear diffuser also helps a lot.
Not to mention the mirrors, the noise from them is deafening at those speeds.

For my next attempt to reach 184mph I will have the bushings replaced and a CSI kit installed.

[mjrgroup]

I have done quite a bit of high speed driving, and if the aerodynamics are not right, and the suspension is not firm enough the car will start to bob up and down like a boat.

It is usually hard to find a perfectly straight piece of road long enough to reach such speeds and taking even the sleekest bend at those speeds with a car that is bobbing up and down like a boat is exciting to say the least.

In 2007 I drove my 850 to 260kph with a shot stock suspension, bad bushings and worn steering..... I almost shit my pants, the car was perfect in 240, decent in 250, but in 260 it was terrible.

In September I did 270 with worn TA bushings.... not quite as bad as last time, but still not good. Could have reached much higher speeds, but I had a CSI in front of me so I had to stop. I have the Eibac/Bilstein suspension upgrade done since last, with camberplates.

I also realize that the CSI bodykit is a must have for high speed driving.
The front gets too little downforce, and the air stream under the car needs to be improved, the rear diffuser also helps a lot.
Not to mention the mirrors, the noise from them is deafening at those speeds.

For my next attempt to reach 184mph I will have the bushings replaced and a CSI kit installed.

Next is the overwhelming fear of a blowout. Keep a close eye on tire pressures as they should be inflated a bit more for high speeds.

Also is the fear of accidentally turning the steering wheel in one direction, which could potentially be deadly.

Mercedes have a button that firms up the steering for high speed driving...a useful feature in my opinion.

I wonder if there's a way to accomplish an on-the-fly steering sensitivity retrofit like that but for our cars...

Btw, I don't mean to threadjack, but aerodynamics and suspension are inherently important to the purpose of higher engine power output.

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[Cadillacwill]

believe it or not MJR the 8 is the first car to ever have the feature that your are talking about, except ours is automatic. At low speeds the steering is REALLY easy, but the higher the speed the stiffer it gets. There is a thread about retrofitting this system to a car that is not equipped with it originally.

[huldra66]

I had a CSI in front of me so I had to stop. I have the Eibac/Bilstein suspension upgrade done since last, with camberplates.

Hey hey hey , carefull now , my car is Original AND will stay Original
ha ha

[Noggie]

Hey hey hey , carefull now , my car is Original AND will stay Original
ha ha

Well.. you could remove the limiter..... that way you could get above 265 and not block my way.... hehehehe

[mjrgroup]

Cool, I'll look for that thread and let you know what I find.

[CasperM73]

I want this SC kit. Will it work on the M73 engine?

[rcrad6653]

The same builder has developed an M73 system. As it is the system that is on Egil's car will not work for the M73.

[Noggie]

I want this SC kit. Will it work on the M73 engine?

Not sure, I can tell you that the injection mapping will have to be different.
Regarding the mechanical installation there should not be to much difference there.

Since this thread has sidetracked a little perhaps I should give an update on where I am with the car at the moment.

The car is currently in winter storage and not complete.

I have reverted back to stock camshafts and currently running one of the map's from the previous camshaft testing. I currently have about 400 crank HP.
By simply installing the chip from the original system I would have about 450hp.
This was not done because I'm installing a 15% overspeed pulley on the system and thus have to remap regardless.
The current map gives me a uniform steady push through the entire revband but the timing and AF-mix is off, hence the "low" power output.
We do however believe that this map will work a lot better when the pressure is increased.
We hoped to get the new pulley on the car this year but 4 stuck, and now rounded off allenkey bolts made us come to a halt.
These have to be drilled out and I simply did not have the tools available.
Also I discovered that my DK-motors need an overhaul so the decision was made to get everything done during winter storage and we'd be ready for the final tuneup in April next year.

I also have some additional options that might be implemented.
I am doing a different crank house ventilation than the original kit has, and I have looked into some fuel injection system modifications that will increase the possibilities with the stock system allowing more adjustments to be made to it.
This involves rebuilding the DME's.
Other option is a Haltec, Vipec or similar fully programmable system, though that is estimated to cost me 3500-5000usd.

With sticking to just a new reprogramming the goal is to reach 500 crank HP.
additional changes to the injection system may give a slightly better number.

[IvanHansen]

Impressive Eigil. Maybe you will end up with a moon rocket instead of a car

[kuantings]

Any update 2012?

[B10 BITURBO]

Then you need a 3.15 diff and a SC or TT.

A stock 850 will run out of grunt at about 270kph/168mph.
with the modifications Hartge did to my car 354hp/470nm and the 3.45 diff they put the new top speed at 280kph/174mph.

A CSI is able to reach 185mph before it runs out of grunt, and that takes "forever" to reach.

The 507hp M5 and M6 will do 205mph, and I would assume the e31 would need similar power figures to be able to reach such speeds.
When I get my SC system perfected I think it would be theoretically possible for my car to hit 200mph if I change to a 3.15 diff.
Not sure the car would handle very well at those speeds though.

True,,, MikeC posted some years ago a highspeed run on the LAST day of unlimitid speed on A2 ,,,,,,,,,,, he is more than 2 minutes from 260-300

[ame]http://www.youtube.com/watch?v=VpvrRB79koU&feature=related[/ame]

[Noggie]

Noticed that there had been some activity here that I had missed.

2012 updates.

Well, not much has happened unfortunately.
I talked with a person last year who was going to help me perfect the engine mapping, unfortunately he had to cancel for personal reasons.

Winter is long in Norway, and once out of storage in late March my oil pan seals bust and the car was dripping oil.
I planned to have the gearbox rebuilt, and I was in contact with a specialist shop but they could not do it before late May, so the car sat until late May. It then had the gearbox completely rebuilt, and the oil pan seals replaced, that took a month, and we were in the middle of June.
Also fitted a straight pipe exhaust which made the car sound terrible, yet much more responsive, have a solution, but not sure when it will be implemented.

Went to Sweden for a meeting, got a CSi kit installed and a few days after I got back home my diff broke.

My car currently sits outside my house with a broken diff, but I have a 3.15 LSD from a e32 750i ready to be installed.
I have not had time to do anything with it because I have been away on holiday, and now I'm off to work, hope to start replacing it late July.
Thinking about having the new diff serviced/overhauled before installing it, so that may take a while.
At least then the engine, gearbox and drive train should be 100%.

I have also managed to get in contact with someone who know someone who can map my car, so a solution may be within reach, but nothing specific yet.
I have also found that the camshafts I installed in my car was from a CSi, and they are different than M70 cams, and may be why I'm missing some power, not sure if that can be corrected in the map, I may need to do another cam swap in the end.
The CSi cams are from what I can see somewhat in the middle between the M70 cams and my old Hartge cams.

looks like I may have some progress in August, but it appears that the 2012 season is more or less lost, car goes back to storage in October, and I'm not sure how much I will be away for work between now and October.
Might be lucky and have everything done by the end of August.
Chances are that 2013 may be good though.

[8eights]

Should probably try a Stock set of cams, They will be more in sync with the compression needed for your induction set up, Any aggressive cams will be going in a different direction and will send you towards Higher compression, You will not be able to compensate cam aggression through software. Camshafts are easy to change, Worth a shot. Have a set here if needed to test only/Or? You pay shipping!)

[Noggie]

Should probably try a Stock set of cams, They will be more in sync with the compression needed for your induction set up, Any aggressive cams will be going in a different direction and will send you towards Higher compression, You will not be able to compensate cam aggression through software. Camshafts are easy to change, Worth a shot. Have a set here if needed to test only/Or? You pay shipping!)

Sending cams from the US to Europe just for testing may be a bit elaborate don't you think?
Perhaps you could sell them to me instead?

I have already done this swap once, have all tools I need to do it again.
Worst part of the whole job is the damn intakes

[IvanHansen]

Sorry to hear that Eigil

I'm looking forward to see the end result. You have come a long way since I saw the car a couple of years ago. Looks great with the CSI kit

Any idea why the diff broke?? Is it because of the extra HP?

I'm finishing a lot of things on my own car at the moment all with the purpose of ending up with a SC-kit like yours. Will not have the cash until after my next tour in 2014. So I'm following your progress and please keep us updated

Hopefully I will be able to participate in the next 8-meeting in Scandinavia.

Good luck with the project

[Noggie]

I'm looking forward to see the end result. You have come a long way since I saw the car a couple of years ago. Looks great with the CSI kit

Any idea why the diff broke?? Is it because of the extra HP?

It has come a long way in some ways, but there is still a lot to do.

I think the diff has been bad for a while, I floored it, and it just went bang.
When I looked at it there was a crack in the housing, there was also a lot of grime around that area, so the crack may have been there for a while, and really opened up when something inside decided to break.
I found a big puddle of oil under the diff the next day, but have not seen any drops coming from it before, but part of the crack did not look new.

The extra HP may have played a part, but I think it was going to fail anyway.

If the cams fix it without the need for any programming, then the kit I have should be bolt on for your car.
The only difference between my car, and the car in the middle est running this kit is my cams, and they run perfectly.