first track night of the season and they shut us down at 930pm due to moisture on the track and the Outlaws skating all over the place.

I am currently running the 3.1 pulley on a 'safe' tune, meaning that I am opening the boost bypass at ~220kpa (17-18psi boost) to keep the 60lb injectors happy at ~76%-~78% duty cycle.

run1: 13.267@108.85, 2.0
run2: 13.215@109.78, 2.0
run3: 13.286@109.17, 1.9
run4: 13.116@110.03, 2.0
run5: 13.353@109.78, 1.9

still running the stock clutch and axles,
so not too bad for the first night out in 6 months, yeah I definitely felt a bit rusty, but still managed a hair better than my best time with the M62 w/2.7 (13.146@105)

I like how the trap speed is noticeably higher with the slicks on, that's almost a 5mph improvement right there as compared to my best slick trap with the M62 (105.8).
Even exceeds my best street tire trap with the M62 (107.74).

I also liked the consistency of the runs, it kinda felt like this setup with the TVS was sorta helping me out a bit, because even though I felt like I botched up a couple of the launches and shifts, the run still went well.

oh, and I also want to mention for comparison purposes that the 3.1 TVS runs were using my street tune with pump gas and the meth injection.

Whereas, the ol 2.7 M62 runs were using a tricked out track-only tune, race gas, and meth injection.

photos from that eve:
Redline launch
http://www.smugmug.com/gallery/47097...5_D2PPp/Medium
packing it in at 930pm
http://www.smugmug.com/gallery/47097...4_Ew5Du/Medium
gallery
http://www.smugmug.com/gallery/4709787_WJvJD

slips:
https://www.cobaltss.net/gallery/fil...ips1_small.jpg
https://www.cobaltss.net/gallery/fil...ips2_small.jpg

in-car video: http://www.youtube.com/watch?v=_VT82Wh8VCU

top10 sport compacts that night : http://missionraceway.com/mrpresults...08apr11FRI.htm

 

nice job

 

wow thanks for a post

whats ur full mod list?
dyno?

VID's?

 

now people can start claiming LS1 kills....


(my camaro did 13.20 @108 stock, for reference)

Way to go!!!!!!!!!!!!!!!!

there's alot more left in the supercharger, but i agree its good to be safe at first

 

what were your 60' times? if you're trapping 110 ur hauling ass so I'm wondering why still in the 13's?

still very good runs considering that you had all those mods just to get the m62 to 13.1....

 

good track time man...im happy for you

 

Verrr Nice

 

not bad i was hopeing for 12s but im sure with more tuning it will get there no problem.

 

im assuming those are his 60's at the end of each track time....

run1: 13.267@108.85, 2.0
run2: 13.215@109.78, 2.0
run3: 13.286@109.17, 1.9
run4: 13.116@110.03, 2.0
run5: 13.353@109.78, 1.9

 

wow thats fast

 

Glad to hear that it went well for you last night.
When are you looking to address the fuel question?

 

He did 13.1 with THE m62 as well................................

 

TVS w/3.1
60lb injectors
K&N cai
water meth injection
front mount cobra heat exchanger
header w/3" exhaust
traction bars, motor mounts, tranny mounts
Hoosier qtp dot slicks

I have in-car video avail if that's of any interest, I just need to d/l it off the video camera and upload it to youtube or somewhere.

hoping to get back to the dyno real soon....

 

Yeah, but he's not even remotely flexing the TVS's muscles yet. Give it some fuel, a better tune, and a nice 2.75" pulley and it looks like low 12's will be had.

Great work and good times.

 

he trapped significantly higher. That's what it's about. with 20psi +/- he could be mid 12's for sure. since the tvs isn't pumpin hot air like crazy either he could probably safely push more on it than on the m62...you could go low 12's for sure with a smaller pulley and some more traction work...

 

would love to see that vid

thank you

 

1.9's and 2.0's
(as listed after the times I posted up top there)

yeah I was hoping to see you there Rod (or any Cobalt for that matter!)

I'm still formulating a game-plan for the fuel system, but yeah looks like it needs to be done sooner rather than later.

 

awesome man good work

 

ya the times are close but like stated above the speed is a huge improvement and with a better tune and some traction easy 12's and better yet with some more fuel and more boost youll be deep in 12's

 

Yeah, I wish he was at the track too! I want to see what his new to him Cobalt will run at the track! Not the I have a vested interest in it or anyhing.

 

subscribed

 

There was a mixup with the stage 2 axles so those are on their way back for replacements. I am also ordering the d/r's so I should be ready in a couple of weeks.

 

nice times. It kind of sounds like your top end was dying off since you didn't net a 12sec time. Even though you trapped 110, I'm betting that all the power came from down low and mid range, especially since you had the bypass opening at 17/18psi.

Nice to know that it's trapping that high though! Keep up the good work testers!

 

I look forward to figuring out the fuel issues and put the 3.5 throttle body back on.
I did my initial tests with the 3.5 tb and no limits on the boost, so the TVS w/3.1 pulley was more than happy to run up the map pressures to around 260kpa.

Now that was impressive!
I gotta admit it was the first time since I bought the car 3 years ago that it was actually a bit scary to drive on the highway, it made my adrenalin pump (which was kinda cool cuz that hasn't happened in like forever),
and also was the first time my car has broken the tires free in 3rd gear while accelerating (on stock clutch). That was freaky!

But due to the fueling issues and screwy maf readings I elected to back things off for now and find a safe zone (at least to me).
Definitely think I would have busted something if I had left it like that.

surprisingly, the 1/8th times were about the same as my M62 w/2.7, so I thought that was pretty good for the TVS w/3.1

it made the extra during the last 1/8th and it was still pulling strong at the 1/4.

 

I'm sold. Need to mod towards TVS. Forget GM s2.