Setting The Correct Fuel Pressure

95blueoval · 05-23-2005

I just bought a 70mm T/B and a C&L MAS kit along with a fuel pressure regulator and gauge. None of this has been installed yet though. I hope to get it started next week. My question is this...Along with my full exhaust (see Sign) where should I set my fuel pressure? What is the fuel pressure stock? Any tips on tuning it?

GTRaptor · 05-23-2005

Dont want to dissapoint you but.....
..that 70mm TB is ok, but your intake is 65mm..port the entrance to 70mm to match it, or it will be worse than having the stock 65mm in there.

The C&L will go in without a problem, but air fuel ratio most probably will be off some.

Adjusting the fuel pressure might be of help, but if you dont have a reliable way of measuring air/fuel ratio it is a waste of money.

sorry to say all of this, but things that you add, and not get tuned sometimes end up killing HP.

If i were you i'd go with a good tuner and check the air fuel ratio, then strap the car to a dyno and see whats the best tunning option, the FPR might help, but i suggest a custom made chip.

Quote:

Originally Posted by 95blueoval

I just bought a 70mm T/B and a C&L MAS kit along with a fuel pressure regulator and gauge. None of this has been installed yet though. I hope to get it started next week. My question is this...Along with my full exhaust (see Sign) where should I set my fuel pressure? What is the fuel pressure stock? Any tips on tuning it?

95blueoval · 05-24-2005

I could have sworn that I read my opening on my cobra intake was a 70MM. Am I wrong? I sure hope not...but then again it wouldn't be the first time I have to modify something to make it fit correctly.

I can get an air/fuel ratio gauge for free so that may help, even though a wide band would be the way to go.

Thanks for the advance though,

I now plan on getting a TWEECER with a wideband sometime this summer if everything goes according to plan, but until then.

So does any body have a good base line to go from on the fuel pressure? Should I raise or lower it from stock? I heard that a mildly modded car needs to have the fuel pressure dropped off a bit. TRUE??? Come on I know about 1 million of you guys have adjusted your fuel pressure.