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Discussion Starter · #1 ·
I just installed a 2.3" pulley on my JRSC and have a question about the MAFS voltage. From my understanding, once the voltage reaches 5V, no more fuel will be metered and excessively lean conditions will result-not good. What happens when my engine starts drawing even more air due to higher blower rpm's from the smaller pulley? Will I reach that 5v cutoff? How do I tell if the mafs is maxed out? What do I do next? get bigger injectors/recal MAFS combo? I have 30lb injectors/recal MAFS (no chip) on the car now, with aquamist water injection and do not get any detonation at all. The car runs great, awesome power and throttle response but these questions.....
Thanks for any info on this!
 

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Discussion Starter · #4 ·
I think you're right about the custom chip-I have been putting it off because with the 30lb injectors, I haven't been getting any detonation at all but with any bigger injectors and the higher boost, I will definately need to pull some timing.
BTW, how would I calculate what the best sized injectors would be? I s there a rule of thumb about HP and injectors? I got 169whp before the race header and 2.3" pulley.
I am now getting 7.5 lbs boost with the 2.3" pulley, and got about 5.5 with the 2.6". I will be getting a dyno test next week to check out how much additional power the 2.3 is giving me.
 

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Discussion Starter · #6 ·
Jeff,
Thanks for the info. When I get my dyno done next week, I will figure it out. BTW, what formula would you recommend to get crank HP from whp? add 10-15%?
Thanks
 
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