Street Racing & Kill Stories - big turbo cobalt ss vs supercharged c5

Did a quick highway pull against my friends cobalt yesterday. We went from a60-135ish roll. His lack of brake boost hurt him real bad and I jumped out hard, maybe 4 cars but he started closing in 4th gear. In the end though I still had him by 2 cars and we have a rematch coming soon with him brake boosting. cars are modded as follows:

07 cobalt ss/sc turbo swapped with precision 6262 billet wheel 24 psi, zzp stage II turbo cams and valve springs, stock bottom end. hahn intake manifold and fmic aeromotive stealth 340 id1000's e85 and bfrps

99 corvette stock motor, si trim blower at 9psi, 2" arh, 3" x pipe, c5z ti's, e85

http://www.youtube.com/watch?v=g1BRjxMBbTE

Need a blower cam. Put some more lengths on him ;)

Car sounds great!

damn man I was just going to post the vids up lol
here's that cobalt
http://www.youtube.com/watch?v=q45sBRxaDgE


rematch will be a better race lol

What fuel are you running (cobalt)

Lol @ thread title and 6262 on cobalt.

Mediumish turbo?

Good kill! Looking forward to any rematches!

Lol @ thread title and 6262 on cobalt.

Mediumish turbo?

Medium for a Cobalt with a 2.0 liter engine?

Good kill! Looking forward to any rematches!



Medium for a Cobalt with a 2.0 liter engine?

Yes, medium for a cobalt with a 2 liter engine. Pushing 30+ psi on e85 you MIGHT and I stress MIGHT crack 600 with that turbo.

um no, that turbo is good to over 650whp, and he's only running 23-24 psi considering the cobalt is running a bone stock motor (cams and valve springs only)
plus why would you need more on a fail wheel drive car? hell mine was up over 500whp and would spin all through 4th unless I had the mickey's on it.
Cobalt was braking the tires loose at 140mph at 7200rpm in 4th gear as it was that race. (was data logging the cobalt)

cobalt is at 99% idc on id1000's so it's completely maxed for the time being, running E85 in both cars.

rematch possibly friday night, considering the cobalt was running 13mph faster when they let off, outcome might be different.

Yes, medium for a cobalt with a 2 liter engine. Pushing 30+ psi on e85 you MIGHT and I stress MIGHT crack 600 with that turbo.

What is considered a "big turbo" in the Cobalt world? 600 hp seems like something you don't see everyday with those cars (I've never seen a 600 hp Cobalt in person.)

Pretty sweet cobalt

Lol @ thread title and 6262 on cobalt.

Mediumish turbo?

5th Gen + Busa = This guy

ah missed that lol. fast toys make cobalt look slow

um no, that turbo is good to over 650whp, and he's only running 23-24 psi considering the cobalt is running a bone stock motor (cams and valve springs only)
plus why would you need more on a fail wheel drive car? hell mine was up over 500whp and would spin all through 4th unless I had the mickey's on it.
Cobalt was braking the tires loose at 140mph at 7200rpm in 4th gear as it was that race. (was data logging the cobalt)

cobalt is at 99% idc on id1000's so it's completely maxed for the time being, running E85 in both cars.

rematch possibly friday night, considering the cobalt was running 13mph faster when they let off, outcome might be different.

What base fuel pressure is the cobalt at? Those ID1000's can flow 1350cc at 100psi

5th Gen + Busa = This guy

tell us about ur regal

um no, that turbo is good to over 650whp, and he's only running 23-24 psi considering the cobalt is running a bone stock motor (cams and valve springs only)
plus why would you need more on a fail wheel drive car? hell mine was up over 500whp and would spin all through 4th unless I had the mickey's on it.
Cobalt was braking the tires loose at 140mph at 7200rpm in 4th gear as it was that race. (was data logging the cobalt)

cobalt is at 99% idc on id1000's so it's completely maxed for the time being, running E85 in both cars.

rematch possibly friday night, considering the cobalt was running 13mph faster when they let off, outcome might be different.

how the fuck do you max out id1000s at that power level

What base fuel pressure is the cobalt at? Those ID1000's can flow 1350cc at 100psi

58psi base pressure with a 1:1 fuel labs regulator. was running 11.8-12.0:2 afr (gas afr aem wideband) E85 is key to maxing them out though. reg gas would have plenty of head room.
Hell I"m maxing out 79lb injectors on my car with e85 and a small pulley on the stock blower. 12.8:2 afr

how the fuck do you max out id1000s at that power level

it's over 500whp on e85 on a 4 cylinder. no idea how much power the car is making as of now, need to toss it back on the dyno in a few weeks to see.
was making 438whp on @20psi on a hp5857 and pump gas, haven't dyno'd it since

it's over 500whp on e85 on a 4 cylinder. no idea how much power the car is making as of now, need to toss it back on the dyno in a few weeks to see.
was making 438whp on @20psi on a hp5857 and pump gas, haven't dyno'd it since

Ah.
For some reason I was under the impression that the cobalt was a sub 500 car. My bad.

should be sitting @530+whp according to maf readings.
vette was showing 62.18 lb.min through maf when we were out tuning saturday night
cobalt is running 33.25 (works out to @65lb/min) (engine volume 1/2'd to run id1000's car thinks it's a 1 liter) but maf is a bit skewed to.
mean little 4 cylinder. At least chevy got something right in that car, stock motor is stout

Damn thats one badass Cobalt

Need a blower cam. Put some more lengths on him ;)

Car sounds great!

nah gotta give him a chance, when he beats me ill break out the tt z06.

That cobalt seemed to hang on pretty tight. Good vid !

LSJ/LNF heads flow like stopped up donkey ass. GL making 650 on a 6262, because it isnt happening regardless of what the turbo is 'rated' for. My POS saturn sky barely cracked 460 @ 30 pounds on a 3082R, which isnt too far departed from the 6262.


Cobalt is fast, all im saying is the turbo isn't really that large.

Well since you put it that way...

LSJ/LNF heads flow like stopped up donkey ass. GL making 650 on a 6262, because it isnt happening regardless of what the turbo is 'rated' for. My POS saturn sky barely cracked 460 @ 30 pounds on a 3082R, which isnt too far departed from the 6262.


Cobalt is fast, all im saying is the turbo isn't really that large.

Just cuz you have a low weight 5th gen you think you all cool and shit.

lol.
regardless that balt does move, trying to get both cars on the rollers just to see where they stand power wise.
amazing what they can do on a stock motor.

nah gotta give him a chance, when he beats me ill break out the tt z06.

lol the beater vette is only so fast

58psi base pressure with a 1:1 fuel labs regulator. was running 11.8-12.0:2 afr (gas afr aem wideband) E85 is key to maxing them out though. reg gas would have plenty of head room.
Hell I"m maxing out 79lb injectors on my car with e85 and a small pulley on the stock blower. 12.8:2 afr

Like I said, those injectors are even better at high fuel pressures.

See this:

http://www.youtube.com/watch?v=oK2LGTPw2ls&feature=plcp

need fuel much?
http://i81.photobucket.com/albums/j206/black06g85/20120527_131320.jpg

sorry took the pic to show him he needs to let off the gas when he finishes a pull lol.
but 99%idc
maxing out the maf too in the early 6k rpm's.
need to do some work on that thing.

Thats a hell of a scan graph, lol. Def needs fuel work, and a scaled maf table.

it is, had to half all the tables to get this to work. maf is maxed the f out though early in the pull where you see it flat line. Pcm believes the car has a 1.0 liter engine. oh and wideband is showing gas afr, running E85 which is why commanded and wideband are so far off
I also took the pic after the pull to show him how much rpm it picked up after he let off from the momentum

wideband and pcm should both work off of lambda, doesnt really matter what they show. If you change the stoich value of the fuel in the pcm and work by lambda, itll show commanded fuel in line with your wideband instead of how you have it setup now with a huge lambda command value to get the AFR. It will probably clean up idle a bunch too. Just sayin.

thing idles fine though (has pretty large cams in it, idle set real low as per owners request)
and I know, I do mostly reg gas tuning, haven't messed with the config file to setup for e85 much yet, other than making it line up with commanded at wot.

Crazy listening to a cammed Cobalt - lol I'm sure its a blast to drive.