Ok guys something is wrong with my car and its not a boost leak because i already checked that my car is only traping 107.41mph on almost every run what the hell could it be i mean my ca is puling hard as HELL

Please guys i need some help

 

Do you have a time slip for us to look at? What are your R/Ts, 100', and 1/8 times and speed at the later two?

 

R/T... .648
60'.... 2.022
330.... 5.448
1/8..... 8.346
MPH... 83.44
1000... 10.844
1/4..... 12.934
MPH.... 107.41

i know the 60' is sh!ty

 

have you changed your plugs lately? If you put the wrong and or gapped them wrong then the car may be misfiring at higher RPMs

 

Slipping clutch possibly?

 

how much boost are you running and what kind of fuel?

 

Wrong forum, Cuban. I guess that big thread talking about suddenly jumping to 380whp with a new tuner makes you wonder, eh? Goes to show how the butt dyno is almost worthless (and sometimes actual dynos).

I think you were trapping higher (and driving better) than this before all those mods and the controversial retune, so something must be mechanically wrong. If you actually did a full boost leak test up to 25psi, then get a fresh set of NGK BPR8ES or BR8ES gapped to .026 and slap those in. If that doesn't work, be sure to get logs of your AFRs, timing, and boost so that we can analyze them.

 

I have a set of plugs that i will be putting in my car tomorrow lets se how that goes

 

Do a compression test after you do the other tests people have suggested...

 

Your 60' time is bad. I bet you'd find 3 or 4mph worth of trap speed if you got into the 1.7 range. You just need more practice.

 

With a lower 60' his trap would drop even more...

 

Problems could still be with shifting, even with a lower 60' you'd net a faster E/T and sometimes your trap can be reduced slightly cuz you covered the same distance faster and giving your car less time to reach a certain velocity

 

Did you ever find out why your car was trapping low OP?