I have a 224/228 586 596 113.9 in my car right now. I only put down 379.8 RWHP before true duals and an asp pulley. My car on friday ran on the motor 12.37@110 n/a and a 11.20@121 squirting 100. Something is def not right. I have PP S2 heads ,LS6intake ,Pacesetter headers and this is all I have run. I should at least be trapping 115-116 n/a. Im going to do a compression test on the car and see what that brings.
Justin

 

I have more less the same problem. At 2400ft I only trapped 111MPH with my stock gears and street tires cutting a 2.36 60ft. It felt fast but I was expecting more.

 

hmmm what kinda gears do u have... ya somethin is up, cuz my basically stock car is trappin 109 mph

 

what was the full slip? what were the track conditions and what were other cars running?

 

OUCH i run 119 with cam only.

 

Maybe a timing issue? Possibly false knock and the PCM is cutting timing, thus lack of power? Try A-tapping while running some full-bore passes and see what is going on.

 

What were the weather conditions? Pressure, humidity, temp? You can lose 3-4 mph pretty easy with bad conditions.

 

what gears do you have now 3.73 er...?? Last time i hit the track pushing 373 to the wheels with a bogg off the line w/ my 2.73's i trapped 112 in 70 degree weather...im hoping we can fix my issues and get that mph up to 114ish...bottom line i think your #'s are off but what conditions was this in, what gears? Any noticable issues with the car?

 

I have 3:73s. Im going to ATAP the car tonight so I should know more. The weather was low humidity 75 out. I don't have the slips with me so I couldn't tell you
Justin

 

What is the elevation at the track? What did you trap there BEFORE the H/C.....If at a high elevation track thats not bad. If its in Houston that is horrendous.

 

the local airport is 799. Its not more the 1200 at the track im sure

 

Do your Pacesetters hit the k-member? If so you may be getting some false knock which can be retarding your timing, causing lack of HP. AutoTap that **** and see what the KR is and timing, may answer your question