Do you think I ca beat a 350Z

[///M3///M5]

I raced a 350Z from 70 to 120 mph and we were dead even the whole way....do yall think this should happen....i thought i could kill him (his 350Z was stock).....i have a 99 M3 with cams, euro hfm, cais, AA exhaust, AA track pipe, uuc underdrive pullies, fan delete, shark injector, and a eurosport intake manifold.

[yotone]

auto or stick?

[///M3///M5]

auto

[GotBHP?]

Not that it helps you much, but my car with pretty much the same mods (minus the auto tranny and trackpipe) doesnt have trouble with 350's from those speeds.

[///M3///M5]

soory i thoug you menat was the 350Z an auto or manual......i have a stick

[///M3///M5]

the guy actuall pulled away from me when i was in 5th

[LukeG]

hmmmm was this a friend of ur with the 350??

if not i think he was lieing about being stock

Luke

[///M3///M5]

i saw the engine

[yotone]

maybe you shoulda used 4th gear

[///M3///M5]

i started in fourth......just a quick question....yotone how much pull do you feel in fourth if you gun it at 60

[GotBHP?]

If you still have the stock tires sizes and the same diff., 2nd gear tops out right at around 60 mph at redline. This I believe would put you (at 70mph) right at your sweet spot in 3rd gear. That I think would have made a big difference. Just a thought, i may be wrong

[dan330]

started at 70 mph. Why were you in 4th.
Would 3rd not be better?

[///M3///M5]

i have a stock diff, worn out clutch, and no tread on my tires...but i still should have been able to keep up......we were side by side and i was at about 4000rpms and we gunned it and stayed dead even

[///M3///M5]

i may have been in third (i was kinda in the heat of the moment)....but i know i was around 4000 rpms

[dan330]

hmmmmm....

From what little I know.....You should have won!

He has a very strong 350Z or
Your M is very weak. Maybe a tired engine.

Sorry.

[///M3///M5]

whta is the best thing to do to check for engine wear? compression check? cylinder misfire?

[GotBHP?]

Hey dont let one tie with another car send you to the shop for compression tests, leakdowns or whatever. Although it cant hurt to get these done, or a dyno run or 2 for that matter, I wouldnt sweat it unless you are noticing a large decrease in performance in your car.

[///M3///M5]

Ok.....im just worried cuz i just finished putting in my eurosport cam system today and it kinda got me down when i raced him cuz i though i should have beat him.....i mean i have raced cars pretty close to that whne my car was closer to stock and beat them.

[GotBHP?]

Who installed it? If the cams are installed a degree or so off, that could mean big problems. You mentioned your mods in the first post, I assume you had 24#injectors installed with everything else correct? Anyways, the cam kit wont show its real beauty until you take your car out on a road course.

[Aggieland81]

Car-Stats.com Report for 1999 BMW M3
Obtained from C&D September, 1999
0-60: 6 Transmission: Manual
1/4 Mile: 14.6
1/4 Speed:


Car-Stats.com Report for 2003 Nissan 350Z
Obtained from C&D August, 2002
0-60: 5.4 Transmission: Manual
1/4 Mile: 14.1
1/4 Speed: 101


Stock, the 350z is quite a bit faster, with u and all those mods i could see u guys bein even.....

[yotone]

fuck car-stats

[///M3///M5]

yeah i did all of the install myself (with my dad).....but we had so many special tools there is no way anything was installed incorrectly....i do have 24# injectors (it all came in the eurosport cam system)

[///M3///M5]

i think i would have smoked him from a dead stop though

[FastrTHNu]

thats what I was about to say....from a dead stop i spank 350s all day long, on the highway they are a bit of a problem.....all i have is the 540hfm and 24# injectors, on a 95 M3....

[E36M3]

with those mods, you should have walked on the 350Z. Hmm, interesting (cue Twilight Zone music).

[Computurk]

You can beat a stock 350Z with your M3.
I can keep up to 130mph with my 330, but they have a higher end. I just hate it when I run out of juice in my car, still hoping for a supercharger soon.

[JamesM3M5]

Could be low compression, bent valves? Ever mis-shift accidentally? Bent valves are VERY common on the M50/S50US variants. Most people don't know it until they get a compression/leakdown test.

Something is definitely wrong if you're 100% certain that 350Z is stock. You have cams, right? Are you sure they're timed exactly right?

[///M3///M5]

yeah i am positive they are timed correctly....i have prob mishifted two or three time before and was thinking about getting compression/leakdown testing but i have no clue where to get it done and i heard it was expensive

i raced to guy on the same day i put the cams in (could that have any effect at all?)

[yotone]

maybe you just need more practise knowing when to shift gears.

[yotone]

Originally posted by ///M3///M5
i started in fourth......just a quick question....yotone how much pull do you feel in fourth if you gun it at 60

if i was at 60mph i woulda slammed it into 3rd gear and get close to redline when i shifted into 4th. from 4th to 5th i think the best rpm to shift is like 5.5k rpm?

[///M3///M5]

that is probably partially the problem because i have only had the car for 6 months (i am 17) and it is my first stick of my own

[hsmith]

Originally posted by Armo95
I have intake, euro HFM, chip, injectors, headers, track pipe and exhaust and I WALK away from 350Zs no problem, no matter where we start, stop or roll. You even have cams...I don't. Let alone if he's automatic...that should be even worse for him.

A couple weeks I had a run with a 350Z that had exhaust and I had 3-4 cars from a 60-120 run...

Thats what i thought.

[AwesomeM3]

Ok firstly that is a sick car for a 17 year old.
And you might just need to practice somemore.
60mph is definately third gear realm.
Don't worry next time make sure your in third at sixty and murder the 350Z :)

[AwesomeM3]

By the way where in Georgia are you and what highschool do you attend?

[///M3///M5]

I live right outside of Augusta in Evans, Ga......Lakeside High School......and it is a pretty sick car for a 17 year old.....but not as sick as the 16 year old at my school with a 2003 E46 SMG M3 fully loaded....how much do compression/leakdown tests run?

[GotBHP?]

Um, if you have got cams and all those goodies, shift at redline man. The only reason to short-shift before (if you even think its faster to do that) was because your m3 when it was stock might have run outta breath up top, but the cams have fixed that. Dont be afraid of letting the motor rev, just be afraid of dropping it into the wrong gear and doing the infamous money shift.

[GotBHP?]

Oh yea, if you can install cams yourself, compression/leakdowns should be no problem.

[yotone]

i mostly downshift 2 gears. from 5th to 3rd or 4th to 2nd. that way theres really no way you can mis-shift.

[///M3///M5]

how do i do compression/leakdown tests myself?

[JamesM3M5]

Need the gauges and M12 spark plug adapters. I bought the compression tester from Advance Auto (the Actron in an orange package) and the leakdown from Summit Racing Catalog. The compression tester has the right adapters and will work with the leakdown tester, but I haven't done it yet.

It's pretty simple yet time-consuming. You must do both with a hot engine, or you'll get low numbers. Doing just a compression test will tell you whether you have a bad cylinder. The leakdown test helps determine whether it's rings or valves. You can also put oil into a low-compression cylinder and retest. If the reading comes up, you have bad rings. If it is still low, you have bent valves. All 6 should be within 10% of each other, and above 180psi for a 10:1 compression engine. The actual value isn't that important, but the variance is.

The leakdown test requires compressed air. You get the engine hot, remove the coils and plugs, screw the tool in, get the cylinder in question to TDC, hold it (with a breaker bar on the crank nut) and charge with compressed air. At 100psi inlet pressure, your cylinder should hold at least 90psi. More than 10% leakdown is not good, and 15-20% is time for an engine rebuild. CAREFUL!! The engine will want to turn when you hit the cylinder with compressed air!


Oh yeah, I forgot to mention--you should disable the ignition during the compression test, because you need to crank the engine with the starter. Unplug the DME or its related fuses. Hold the throttle wide open when cranking.

[GotBHP?]

Ive never done a leakdown myself, but for sompression you just rent the tool that measure the compression of the cylinders (sorry I am blanking right now). Warm up the car, remove all of the spark plugs, screw the tool into the sparkplug hole of one cylinder, turn the car over with someone turning the key while you read the tool thingie which will tell you how many psi (or whatever units the tool is set to) each cylinder is capable of producing at tdc.

Sorry I sound kinda retarded, but thats the general idea.

[GotBHP?]

Haha damn I could have waited 3 seconds to post and not sound like a moron.

[///M3///M5]

so for compression you have to hold it at tdc also......and you have to check each cylinder individually?.....also do you turn the all the way over or should you remove the fuel pump fuse so it will not turn over

[///M3///M5]

nevermind about holding it at tdc for compression (stupid comment) the valves wouldn't create any pressure if the cams arn't turning.....sorry for that idiot moment

[yotone]

Originally posted by ///M3///M5
i have a stock diff, worn out clutch, and no tread on my tires...but i still should have been able to keep up......we were side by side and i was at about 4000rpms and we gunned it and stayed dead even

get new tires before you do anything else. this is a must if theyre that bad.

[///M3///M5]

yeah my tires will not come anywhere close to holding the road if i gun it at like 3500 rpms in 1st or 2nd......they wont even hold in 3rd if it is raining......i think i am gonna get michilen pilot sports

[///M3///M5]

i did a compression test today and all cylinders came back perfect.....220 psi on 5 of them and 224 on cylinder 5

[NC98///M3]

I beat 350Z's in my M3, and I only have a few bolt on's. You should walk a Z with no problem. Stock to stock the cars are a dead heat race. Don't magazine race, it's gay. Maby you didn't beat him b/c you suck at driving.....like alot of people on the board.