2birdJosh

agree with having shop look into it. let us know after friday. my good buddy lives in south carolina and is corvette tech he says he goes to georgia alot dont know what part thou!

Justin_2000z28

I used a online calculator. Lol but I could be wrong. But the track I go to sucks . The officials don't keep the track prepped. The frost pass I had was my fastest, so I'm thinkit's driver error, vapor locked fuel system.. And but back tires.

But I cleaned my maf and it helped. But the throttle body is really killing me . I can put it to the floor from a roll, and all it does is accelerate , it doesn't down shift to a lower gear.

babbage1109

iTrader: (11)

I have the kdw bfgs on my car in a 295/35/18 and cut a 2.01 60 ft but we are still 12 mph different. Lol I don't spin when I launch. Try launching at around 1100 instead. That tb needs to be checked for sure.

Justin_2000z28

Are your abs lights on ? Lol I had 295/45 /18 n555rs before and it turned the abs lights on.

babbage1109

iTrader: (11)

It's 45 profile. That's way too tall. Abs only gets turned on if the front and back wheels are off in height by 3% I think. I run a 295/35 not a 45

Justin_2000z28

Update.
U got my throttle body adjust so its wide open now. It made a huge difference , but this Sunday I'm going to pick up a built 10 bolt. It has 3.73 gears and a aftermarket diff. So this will make a huge difference in my track times

dannyz

Cool. Get back with us and let us know your new times.

Justin_2000z28

Update got 4.10s and Nittos on the track. Ran a 14.4 at 97.... Still not what I wanted seems a little low . But I'm getting my car dynod in the morning so ill see what power she's makin.

redbird555

iTrader: (14)

you sure you're still opening the tb all the way now. 97mph is still very bad. that car in healthy shape should be going 111 in decent da are you shifting around 5800?

Stardust

Something is way messed up. Hopefully the guys at the Dyno can get it turned around.

Justin_2000z28

Yeah I know, it's opening all the way but . My car made 240hp @290 torque. So I guess I have alot of carbon build up.

0silverado4

More experienced people will chime in but my guess is you got a lot more wrong than carbon build up. You're modded and put down quite a bit less than most stock ls1 cars.

3.8redbird

iTrader: (3)

Did any of the plugs look different when you swapped them?

Do you need to add any fluid or oil?

Compression check?

Justin_2000z28

Didn't get around to changing plugs fluids are good, the guys at vengeance said I probably have carbon build up on the cylinder walls and pistons due to being high mileage .and that should be causing my compression to be low. But I'm just going to build a lq9 for it

"MAC"

iTrader: (1)

Sorry to say man 240hp and 290trq that isnt very good at all. If i was you i would rip apart the block clean everything and while its apart just go ahead and build it. the LS1's are a better motor than the LQ9 IMO. ive never heard of a carbon build up doing that to a motor. My LS1 was so messed up and I still put down more power from a lid, full exhaust, I ran a 8.484 at sunshine drag strip in tampa fl 3 years ago. it could also be a tuning issue as well. my LS1 was already built at one time and the previous owner sprayed it to. come to find out the rings wasnt spaced correctly and they where bent so it cut grooves in my cylinder walls and my PVC system was jacked up causing oil to leak back into my intake hell the inside of my heads and valve covers looked like burnt oil it was so bad. but I still made 335rwhp and 350rwtrq. Just saying theres gotta be something else wrong than just carbon build up.

redbird555

iTrader: (14)

I would run a compression test on it first and see what that reveals if its ok then I would start looking at things like the maf and o2 sensors. Thats down right terrible for an ls motor you should be making around 350 with your setup. If the compression is down then I would pull the motor

Duhockey

my best was a 14.646 at 97... I mean, I think with a good launch I could have gotten maybe a 14.3 or 14.4, is that really that bad?

redbird555

iTrader: (14)

thats pretty bad but what was the da? You live in colorado so if it was 6000 da then that time and trap is ok. et's are next to useless tho as traps show power and da shows the driver

Justin_2000z28

Update! I did some updating to my car , cleaned my maf found a massive vacuum leak, and put headers on. I went to the track and ran a 13.7 @104 with a 2.2 60. Untuned and with a messes up transmission. It took all my friends by surprise!

1999transamls1

iTrader: (5)

Mph is decent now but et is still a bit slow. My car with no tune no second gear and just headers exhaust and 3.42 gears went 13.2. And that was at around 185k miles on the motor