z32 maf
11-25-2003, 12:21 PM
#41
Cool. I just picked up a Craftsman MM w/DC meter capability, so I was wondering if the two correlate since I plan on testing mine out this weekend.
One thing I'd like to add is that RC Engineering says typically use a BSFC of .55-.60 for SC cars. Using 340hp crank, 370cc, 53.5psig FP(10psi w/1:1 FPR?), 80% DC, you get a BSFC = 0.55.
Also, I'm not sure what A/F ratio that correlates with, but I'd ASSume pretty rich, ie 11-12.5:1 vs. your 13.5:1 dyno.
One thing I'd like to add is that RC Engineering says typically use a BSFC of .55-.60 for SC cars. Using 340hp crank, 370cc, 53.5psig FP(10psi w/1:1 FPR?), 80% DC, you get a BSFC = 0.55.
Also, I'm not sure what A/F ratio that correlates with, but I'd ASSume pretty rich, ie 11-12.5:1 vs. your 13.5:1 dyno.
Originally Posted by Stephen Max
No, I don't. The only benchmark I have is that the most I've seen is 80% from the DC meter, which corresponds pretty well with the 286 fwhp I got from the dyno run. The injectors are good for 420 bhp at 100% DC assuming a BSFC of .5, so at 80% duty cycle they're good for ~340 bhp. Converting bhp to fwhp: 340*.83 = 282 fwhp.
Back when I had the 240 cc/min injectors and A32 maf I saw the duty cycle go up to 90-100%, which is consistent with the air flow going above what the maf could handle.
Back when I had the 240 cc/min injectors and A32 maf I saw the duty cycle go up to 90-100%, which is consistent with the air flow going above what the maf could handle.
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