fuel system question

Night Shifter

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Dec 24, 2005
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before i go get my car tuned i figured id ask about my fuel system with my cams..when i was FI i upgraded my fuel pump, injectors, and mass air meter.. when i went back to n/a with cams, i left the fuel pump in but wen back to stock mass air and 19# injectors..

will it be beneficial for me to up to an 86mm mass air and 24# injectors or will my 19's work just fine with my cams..if they work fine ill just go with a new mass air for the 19's and save myself money

will i be able to get more out of my tune with a bigger mass air or is my stocker gonna do me just fine? i just dont want this set up starving for fuel.. thanks guys
 
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sneaky98gt

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Apr 23, 2008
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I don't know the exact answer, but I'm pretty sure there are folks here with cammed/bolt on PI GTs making upwards of 300 rwhp on the stock fuel system and MAF. But I think that is about the limit.
 

Night Shifter

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Dec 24, 2005
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Are you running cam only? What are you mods? Compression, ported heads.
mods in sig...full bolt ons, full exhaust, aluminator block (10:1 compression), hitech II's, stage II ported heads(MPH),

you wont see any gains on a MAF or larger injectors. the only reason you would replace either is if yours are maxed out
i didnt think id see any types of power gains i was just wondering how well cams and the injectors match up..

whats the hp rating for 19lbs when they start to max out?
 

Blackone51

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Oct 30, 2008
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mods in sig...full bolt ons, full exhaust, aluminator block (10:1 compression), hitech II's, stage II ported heads(MPH),



i didnt think id see any types of power gains i was just wondering how well cams and the injectors match up..

whats the hp rating for 19lbs when they start to max out?
The chart I have only goes down to 24 lb injectors and they max out for N/A set-up at 346 and 288 for supercharged.
 

Night Shifter

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Dec 24, 2005
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cool thanks..i should only be around 320 on a good good day so i guess ill just keep the stock stuff..thanks guys :nice:
 

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