Fuel Pressure what should it be?

[turbo1962]

Trying to tune a little before going to track. installed fuel pressure gauge.
at idle with vac line off 43psi. at WOT in 3rd at 100mph it was 60psi at 24# of boost. IS that were it should be? ta49 alky.

 

[87NAT]

FP should rise 1# per 1psi of boost. Your a little short. Add the 24psi to the 43# static pressure and you should have 67# of FP at WOT.

 

[turbo1962]

What do i need to change to raise it? i have a 237 regulator. is the fuel pump weak?

 

["Turbo-T"]

Is the 237 adjustable? If not I'd swap it out. My $.02

 

[turbo1962]

No it is non adjustable.

 

[87NAT]

No it is non adjustable.

Thats your problem. Get a good adjustable one and make sure your pump is hotwired.

 

[turbo1962]

My pump is hot wired. what happens if i turn the Alky up more will that help?
Any one have a adjustable one they want to sell?

 

[Boost231]

7psi off isnt to bad. as long as your not getting detanation you should be ok.

 

[chadly]

What are your 02's at when your WOT 3rd?

 

[turbo1962]

O2's are at 792 no knock. only time i have knock is if driving along about 35mph and put it to the floor about 1.2 knock when the trans kicks down. is that ok?

 

[chadly]

The knock you describe is most likely false. 02’s sound good but personally I would not want to go lower. How do the plugs look after a wide open blast?

 

[Junior Samples]

driving along about 35mph and put it to the floor

If i put it to the floor at 60 i'll tail spin into a ditch

 

[fatride]

Spend a little$$, and buy an adj. FPR.

 

[turbo1962]

Sounds like i have the wrong combo ,at 60mph mine doesn't throw me in a tail spin......... I installed the TE61 with 9/11 and adjusted the chip to max fuel. It wanted to knock all the time so i took it off and put the ta49 back on. never did figure what was wrong. left the 9/11 with the ta49.

 

[GNVYUS 1]

7psi is a bit much IMO, what gauge are you using?

What fuel pump is it?

 

[turbo1962]

Its a postons high volume pump. I was using the gauge from a fuel injection test kit. installing a longer hose to be able to see it going down the road.

 

[Junior Samples]

Sounds like i have the wrong combo ,at 60mph mine doesn't throw me in a tail spin......... I installed the TE61 with 9/11 and adjusted the chip to max fuel. It wanted to knock all the time so i took it off and put the ta49 back on. never did figure what was wrong. left the 9/11 with the ta49.

and i kinda wish i had my old combo back, i have nothing down low unless i launch it at every light...and who wants to do that.

anyway your O2s dont look too bad @ wot

 

[GNVYUS 1]

Poston doesn't make fuel pumps, what brand Walbro, what model 307 or 340 etc?

 

[turbo1962]

It was pe57544 postons think it is smaller than the walboro 307 or the 340