LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

how much can elevation hurt ETs?

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Old May 23, 2003 | 05:23 PM
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zackz28's Avatar
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From: Ashville,North Carolina
how much can elevation hurt ETs?

back last summer i got my car running since i have added lt1 edit to felp things run smoother

my car now has 305 cam ,springs, stock heads, 4 inch cai, ported mass air,stock refreshed bottomend, exhaust manifolds stock, no cats" dual cat car, m6 3.42s,6500 rev limit which it pulls hard to, lt4 knock module,increased timing,

ok, here is what im getting to, after the lt1 edit adjustments in rev limit and timing and some fuel adjustments last fall i ran a 8.76 with street tires on a 2.095 short time, 81.43 mph this being at a lower elevation then bristol , well winter came and here recently i had a 4.10 rearend laying around so i stuck it in to see if that would help my launch , well i get about the same 60ft but didnt get below a 9.05 all night at like 78 mph,so i took that out went back to the stock 3.42 and back into the 8's i went. before the tunning i was like 9.30s best, i know my tunning skills is not expert level but i do know the motor pulls alot harder since, before tunning in the 1/4 i ran a best of 14.29 at 99 mph on about a 2.37 60.

OK so last night me and a friend take off to the big 1/4 track in bristol just knowing we where gonna run 13 something, WRONG we where, his set up is similar to mine but a little different bumpstick,ported heads, long tubes and 3 1/2 y pipe, 1.6 rockers, a stock fire hawk ramair hood set up, and a stock 3.23 rear" just swapped it over from a a4" we ran side by side all night, here are a few of my et last night, 14.11 @100.55 mph 2.306 60', 14.12@100.34 on 2.29 60', 14.16@100.54 on 2.327 60' , 14.12@100.85 on 2.41 60' , and best of the night 14.10 @100.58 on a 2.31 60' time. we went side by side all 5 passes me winning 4 times but only by a few hundredths of a sec, the on time he won he went 14.054 @103.63 mph on a sucky 2.402 60 time, all of his trap speeds where above me but im running stock exhaust cant spring for the lt yet,

Any one have any suggestions on how to get the cars time down, i know the 60 sucks i know we need slicks how much does the front sway bar off help? air pressure in front tires?

We also have logg files from a few of our runs anyone want to take a look at them? maybe somoeone can help these cars should run faster then this, i also have the lt1 edit file that he and i ran our best ets on and log files of this, some one please help us out. where just dieing to get a 13 sec slip,

Hmmm also bristol has a pretty high elevation anyone know what our numbers would be on a lower elevation track??
Old May 23, 2003 | 08:25 PM
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