Help! 14mm still holding case pressure

[RCCUMMINS89]

Shouldn't he be able to hold that peak torque a little longer after 2100 rpm though? I don't see why he wouldn't be able to get more fuel through that thing at a higher rpm.

I do however totally agree about the turbo being too big. But to me it looks like he is running out of fuel, which is what he is inquiring about.

[JQmile]

Fuel high or low, your not really going to know what's going on until you get the pump benched.

[motorwood]

Compression is 400lbs, yes timing is a tricky thing to chase, the a1000 is showing to make over 100psi on both my pressure gauge and my case pressure gauge. I agree that stuff like no AFC, too large a turbos are hurting my HP. I was just thinking that fuel seemed to drop out early and it's worse now than on that 455 run. My smoke clears up and I can hold the pedal almost indefinitely and not break 1700* egt. I should study some of the big guys dyno sheets and see if their power is all in by 2500 rpm. Thanks again for all the good suggestions.
And I guess I didn't want to spend the money to bench it unless that person knew what to do to improve it.

[JQmile]

How much boost again?

[AHineman]

How much boost again?

80psi boost (hx60 over 366)

[JQmile]

Dyno or street?

I don't buy the turbo thing....the turbo(s) no matter what they are should be lit by 2300-2400, which should still give a peaky, yet powerfuel powerband.
I'm betting you super-tuned yourself backwards on the pump, and can't fuel at high RPM.

[motorwood]

I think it was hitting about 76psi dyno, 80 on the street(60lb Gauge around to 0). ??psi when hooked to the sled(needle pegged on 0psi) Have a pull on Friday with a 150lb boost gauge. It is well lit by 23-2400 but seems out of fuel.

[JQmile]

It seems like the looser the gov spring, the easier it is for the truck to run away. I wonder if you put a 366 spring in, if you could turn your fuel screw in more. I'd try that, it's cheap.

[RCCUMMINS89]

It seems like the looser the gov spring, the easier it is for the truck to run away. I wonder if you put a 366 spring in, if you could turn your fuel screw in more. I'd try that, it's cheap.

I'm lost..... What do you mean by the looser the gov spring? A 4200 spring is looser than a 3200 spring?

[oldestof11]

Motorwood, did you shorten the spring or reindex the throttle shaft?

You may want to try indexing the shaft again.

[RCCUMMINS89]

If I am following correctly with the above couple statements.... Is it possible to have a pump tuned where the gov spring is not taunt but actually in a loose or relaxed state at an idle?

I thought I had someone mention that somewhere in a post, but I went out and checked mine and mine rests at a perfect balance of being tight with not actually pulling on it at all while at idle.

[motorwood]

I've indexed, re-indexed, lengthened the full load screw. This brings up an indexing question. Should the throttle be indexed tighter (like to the point the full load screw becomes the idle adjustment) or left a little looser to achieve more travel on the full load screw (edge of runaway)? I've tried both. I think the further in the full load screw, the further the control collar moves ultimately.

I think I'm gonna try a VW style gov spring and shim it almost solid so I only have governing at idle.

[motorwood]

Didntmdo the VW style gov. Replaced the 354 spring with a solid link. Only governing is at idle. Runs good in the shop, won't get to test drive till tomorrow. should be interesting.

[AHineman]

[ahale2772]

cant wait to hear how it goes...