Drag racing questions?????

[Josh154]

I just loaded my trans tune this morning. Holy shit, it's night and day difference! Trans shifts smoother and lock up is awesome. I feel like I'm actually putting power down now, it pulls so much harder with it actually locked up right away.

My rail pressure is what's killing me. We bumped my pw up a little since the 13.07 at the track. The truck holds decent rail right out of the whole and then falls off hard on those few 3600rpm shifts. After it hits 4th and the gears stretch out rail pressure comes back up, after 65mph I'm almost holding perfect rail. Between like 35-65mph rail pressure drops down in the high 23k.

Nothing else to do besides a stroker or dual. I have a feeling it will hit 12s next time, the track was real cold that night and nobody was hooking. It should be warmer next time and with the trans tune and being able to hook up better she's got 12s

 

[Lmmbrad33]

My truck was doing almost the same thing with rail pressure except MPH were a little different, was a weak cp3. Swapped it out and put another over top. :thumb:

 

[Ne-max]

Why would you add more pulse if you cant maintain rail with orginal tune?

 

[JoshH]

A CP3K from Fleece will help hold rail pressure at higher RPM, but it won't fix injectors with high return rates if that is your problem.

 

[Josh154]

Plan is to pull injectors and send them off to exergy to get honed and rebuilt and throw on another pump