fuel injection pump decision

[JoshH]

If you're thinking about buying a new CP3, just run a single 12mm pump in the valley. It will be plenty for 1000 hp and then some. I did 900 on a single 10mm, but that was all it would do on fuel. If I had sprayed it, it might have hit 1000, but I wasn't really chasing a number or an ET with the truck.

I would recommend bigger injectors before you go chasing 1000 HP. You can do it with 60s, but the pulse width will be jacked higher than a max effort tune on a stock truck to get it there.

 

[ZeroGravity58]

I have noticed if I turn the Lift pump off/on it makes the High pressure jump while Idling and can hear it in the engine also. the Low pressure is going from 14 idle to 6-8psi WOT . It makes a lot more power with the pump on . So I at going to do something like BD and crank the Airdog up to 20psi and put a regulator up near engine with 5/8 line instead of 1/2 to see if I can get it stable 8-10psi. One step at a time i guess. Still calling around to get a tune, No luck so far. Called 6 major places got no answer any wheres and got 2 return calls back.

If you have fuel pressure at WOT on the low pressure side then that isnt your problem. Something else is making your fuel rail pressure jump around.

 

[max57]

Yes Josh, I should have at least 100% , got told wrong parts, should have litttle bigger turbo also. For now will take what I get I guess.
Zero, I am running out of things to try. Have a new Tune coming from Starlite, will see what that changes. Also New Fuelab regulator, want to see a stable pressure. Maybe it is the Valley CP3, the Motor runs better WOT with 10psi then when 3 psi for sure. Tune first then 12mm Single Cp3 if needed.
Its only money but it is starting to be stress! Ready to lay some rubber.

 

[Tothemax]

max 57 you bring that car back up to lake gorge this year?

 

[max57]

max 57 you bring that car back up to lake gorge this year?

Yes we are coming up on Friday, leaving Sunday. You bringing something up?

 

[ZeroGravity58]

Did you get the new tune in?

 

[max57]

Got a Tune for Hot street and NO More Idle Lope, WOT pressure is better, not jumping anywhere near as much.Most of the time 200-400psi, couple of 900psi fluctuations. Car is not surging at Mid and WOT anymore. Monday I will get fuelab Regulator and see if that improves Rail pressure. Then try a new Race Tune.

 

[max57]

I bet you just found the problem.

Did you get the new tune in?

Got a Tune for Hot street and NO More Idle Lope, WOT pressure is better, not jumping anywhere near as much.Most of the time 200-400psi, couple of 900psi fluctuations. Car is not surging at Mid and WOT anymore. Monday I will get fuelab Regulator and see if that improves Rail pressure. Then try a new Race Tune.