new track times
09-26-2012, 08:41 PM
#1
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new track times Ok I ran it tonight untuned....the car is tuned just not for the mani swap. So that would still make a difference? I ran a
13.8 at 102.26 with a 2.19 60 ft.
And
13.8 at 101.78 with a 2.16 60 ft.
81 degrees 70% relative humidity wired the times were the same but not the traps. I have ls1 manifold. Hogan catless downpipe. And flowmasters on stock exhaust pipes. Car is tuned but not since ls1 manifold.
13.8 at 102.26 with a 2.19 60 ft.
And
13.8 at 101.78 with a 2.16 60 ft.
81 degrees 70% relative humidity wired the times were the same but not the traps. I have ls1 manifold. Hogan catless downpipe. And flowmasters on stock exhaust pipes. Car is tuned but not since ls1 manifold.
09-26-2012, 10:40 PM
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Nice times man, but once retuned and in cooler weather you will see better times . I'm waiting to upgrade my valve train so I can make a trip to the track and hopefully by then the weather will help as well .
09-27-2012, 11:07 AM
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You need a tune, since you have changed the airflow characteristics of the engine. The MAP sensor is reading different pressures at WOT. I bet your AFR is way off, and the engine can use a little more timing.
I went from 245fwhp to 277fwhp after the ls1 intake swap and Magnaflow exhaust kit with a lose #4 injector pigtail.
Most early auto LS1 F-bodys (98-00) were putting down 280-300whp stock, which will be hard for a LS4 with just a intake swap to match.
I think LS4 racing has the highest dynoing LS4 with the least amount of mods. Waiting to see what he puts down with headers.
I went from 245fwhp to 277fwhp after the ls1 intake swap and Magnaflow exhaust kit with a lose #4 injector pigtail.
Most early auto LS1 F-bodys (98-00) were putting down 280-300whp stock, which will be hard for a LS4 with just a intake swap to match.
I think LS4 racing has the highest dynoing LS4 with the least amount of mods. Waiting to see what he puts down with headers.
Last edited by DavidGXP; 09-27-2012 at 11:19 AM.
09-27-2012, 08:56 PM
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My only mod is a rebuilt tranny with custom minor shift kit and muffler delete it's cut before the y pipe and my 1/8 mile time was 9.36 @76mph is that pretty good o yeah I also need new plugs and wires bad