347 question

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06-10-2008, 05:46 PM

Black 347 monster

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Join Date: Mar 2008

Posts: 9

347 question

I have a build 347 stroker motor on my 88' mustang gt and I plan tokeep it all motor , I just want to know how much fuel pressure does a 347 usually need ? Thanx

06-10-2008, 05:56 PM

5spd GT

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Join Date: Sep 2007

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Posts: 798

RE: 347 question

Depends on injector, but the ECM likes to see 38-40 PSI for EFI units.

06-10-2008, 11:21 PM

Black 347 monster

Thread Starter

Join Date: Mar 2008

Posts: 9

RE: 347 question

It has 30 lbs injectors and it is a efi engine.

06-10-2008, 11:42 PM

jtmustang

5th Gear Member

Join Date: Nov 2006

Location: arlington,WA

Posts: 3,743

RE: 347 question

then like stated above somewhere right aornd 40psi will be good until u can go get atleast an a/f ratio dyno session

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