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boost97gst

10+ Year Contributor
3,034
137
Apr 2, 2012
st jacob, Illinois
Just got engine installed and running:rocks:!! Anyway, im setting my idle, or trying to, and to get .24-.25 airflow/rev i had to bring my mafcomps down -23% down in the idle range. Thats a ton. And to compensate i had to increase deadtime from stock 450usec to 805usec to get around 0% combinedft levels.
Its a 2.0, not stroked, 272 cams, pte 5858 .63A/R, pte 1000cc injectors

Whats going on? Should i have adjusted my global? Its at -51.2%
Fuel pressure should be the same as when i pulled engine(43psi). But i cant tell for sure cause the gauge snapped off. But i really dont think it would suddenly change just sitting there, everything in the fuel system is unchanged.

tried zeroing out and doing a new adjustment. still cant get it right for some reason. Or it may be right LOL, im not sure.. Could this be due to the 272s?
 

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vac is near 20 which is solid. Boost leak wouldnt come into play yet obviously. My maf raw is over 50hz at idle. Idle has to be set at 1k cause of cams though. Otherwise its really rough.
With a substantial vac leak one would think the idle wouldnt be good and steady. IDK, guess i could check everything again for leaks...
Ill do that, do another fresh mafcomp idle and cruise, then go from there. If i have to set deadtime that high then thats the way it has to be i guess. This has to be due to the cams.

edit: well i was just browing through the log file advice section and came across something similiar. Turns out with 272 cams, your not supposed to hit .25g/rev LOL. its supposed to be .31. Problem solved. Now if i can just get my damn lc1 to match my afrest i could do some real pulls. This bi*** has some lag but hits really hard past 4k
 
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