what should i set my fuel pressure at? im running a 10.5 to 1 d16

 

What sort of engine management are you running? There really isn't any one specific fuel pressure that someone can recommend without seeing what your A/F curve looks like, and on a modified D-series setup such as the one you presumably have, more tuning than a simple adjustable FPR is preferred.

 

Factory pressure is from 42-49psi for a d16, and many other cars will yield similar pressures. Ask yourself why you are running rich. What did you do?

 

i dont think im running rich

 

Then why would you post a 10.5:1 AFR, thats pretty rich.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowcivic2k &raquo;</TD></TR><TR><TD CLASS="quote">Then why would you post a 10.5:1 AFR, thats pretty rich.</TD></TR></TABLE>

I believe he meant 10.5:1 compression.

 

thats correct, its a d16 with 10.5 : 1 compression, i had it set at 30, raised up to 45, seems better now.

 

Again, is this the only tuning device you have? If so, you should really invest in some engine management and proper tuning. What is the rest of your setup like?

 

yeah well i just got back together and back in and running. was hopeing i wouldnt have to by an ems but if that happens, ok. lets see, high compression srp pistons on eagle rods, 3 angle valve job, port matched and polished head, skunk2 intake manifold with 65mm str trottle body, dc 4 to 1 headers, aem fuel filter rail and regulator, thats just the beginning. what do you think??

 

I think you could certainly benefit from some real tuning.

 

i have a apexi vtec controller with the fuel tuneing. i bought it a while back and never put it in. think i should try this first of start looking for an ems?

 

An V-AFC would be okay, assuming it's tuned correctly, but a chipped ECU used with a good tuning application would be much better. Is your car OBD-1?

 

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