How high can you raise FP on 24# SVO injectors before something bad happens? I currently have them set at 55 psi and each time I raise it quarter mile time and trap speeds get better. The car is very consistent at the track. The Accel Guage mounted on the fuel rail will only read up to 60 psi. If I go past that will it spell danger for the engine?

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1988 GTA 5.7L TPI Auto
355 ci. block,TPIS ZZ-9 Camshaft, SLP Headers, Borla Cat Back, B&M Holeshot 2400 Stall Converter, 3.73 Richmond Gears

"Why ride a stang when birds can fly?"

http://www.geocities.com/thegta

 

I'd say as long as your performance keeps increasing then keep increasing the fuel pressure! However, I'd say that high fuel pressure like that is probably making your fuel pump work harder which could be bad on the pump!! If you're already up to 55psi then you probably have TOO SMALL injectors! Might want to look into some 30# or 36# injectors!! With the proper set of injectors you shouldn't have to raise your FP to more than 45-47 psi!!

 

I agree with 86tpitrans am. Running 50psi is already straining your pump, 55psi may be too high. Actually, it's probably higher than that at WOT VS no vacuum on fuel rail. I personally wouldnt go much higher on the SVOs than what you have now. Your duty cycle is probably past the recommended 80% dude, you should check it though for reference. If it is, it's not good, you'll burn out your injectors in no time. If you had the 30lbers you would of been more versatile.
Looks like Cartek was right

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91 Formula 1LE 1 of 46
305 TPI 5speed
1LE/G92/WS6

Paxton SN92 supercharger, Ford SVO 24#injectors, Crane AFPR,SLP airfoil, ported/polished plenum, March alt. pulley,Crane Gold 1.6rrs,MSD coil,MSD6AL (5400rpm limit),Holley 9mm wires,Ac delco R43ts plugs,custom chip,Bosch O2sensor,SLP 1 5/8" headers,SLP catback,shortened shifter,3:73s w/Auburn posi,180* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.



[This message has been edited by theformula (edited April 15, 2001).]

 

I raised the fuel pressure up to 58 psi now and it runs even better. I don't want to max it to 60. I am too afraid to hurt the injectors. I will wait to see what happens when it gets to the track. Also did a spark plug reading and the plugs look perfect. No black soot on them.

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1988 GTA 5.7L TPI Auto
355 ci. block,TPIS ZZ-9 Camshaft, SLP Headers, Borla Cat Back, B&M Holeshot 2400 Stall Converter, 3.73 Richmond Gears

"Why ride a stang when birds can fly?"

http://www.geocities.com/thegta

 

I had mine at about 58-60 and it ran okay. I lowered to about 50 psi and it runs much better. That's probably because I was running too rich to start with. Maybe it's time for you to look into a custom prom ?

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92 Z28 5.7
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Trick Flow 23° heads, Comp Cams XR270HR-10 cam, Accel intake base + ported TPI,
TES headers, Flowmaster catback, MSD ignition, #24 SVO injectors, 1LE aluminum driveshaft.

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