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Air fuel tuning and ae in vt v6

Posted: Fri Oct 05, 2012 9:29 pm
by Jervies
Having a play with my van tonigh and im unsure what tables im supposed to be adjusting. Im trying to richen it up because its lean as with the cam and ect, i just moved the base injector rate to like 530 and seams pretty close but leans out at 4,800 in each gear. What are the proper tables i should be adjusting? Weres the beginners guide to non 12p lol

Re: Air fuel tuning and ae in vt v6

Posted: Sat Oct 06, 2012 7:48 am
by Jervies
Whats the chance that im having bad fuel pressure issues? Would make sence....

Re: Air fuel tuning and ae in vt v6

Posted: Sat Oct 06, 2012 8:41 am
by Jayme
yeah, i would think it strange that it leans out at high rpm as the fuel is directly metered by the airflow meter. 2 things are likely. one is your injectors are just too small and hitting 100% duty cycle. other is the fuel rail isnt supplying enough. put a pressure guage on it and run it up to the windscreen and tuck it under the wiper. see if it drops pressure at high rpm.

Re: Air fuel tuning and ae in vt v6

Posted: Sat Oct 06, 2012 10:20 am
by Jervies
My log says im at 120% duty cycle... And i sit on my motor so a fp gauge on the windscreen is not ideal lol. Its got ported heads raised compression and a baby cam so it shouldnt be maxing the injectors.
So no 1 on the correct tables to be modifying? Maby i should convert to the 1's extended maff tune

Re: Air fuel tuning and ae in vt v6

Posted: Sat Oct 06, 2012 10:15 pm
by The1
got a log file to look at? If you have ported heads and cam then it's possible your maxing injectors. What size cam is it? To have to go to such a number with the injector rate it defiantly not right.

Re: Air fuel tuning and ae in vt v6

Posted: Mon Oct 08, 2012 5:59 pm
by Jervies
4.xdl
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Re: Air fuel tuning and ae in vt v6

Posted: Mon Oct 08, 2012 10:55 pm
by The1
injectors look maxed from about 4000rpm and injector pulse time is maxed most of the time while WOT, though strange enough your cylair and MAF hz dont seem to indicate much airflow, even perahps less than a stock ecotec, what cam are you running? what Mods have you done, Have you got a wideband installed, are you getting the correct AFR should be 12.8-13.0 ruffly for N/A

Re: Air fuel tuning and ae in vt v6

Posted: Tue Oct 09, 2012 8:39 am
by Jervies
Im going to have to sort out my fuel pressure problems first by the looks of it. Cam is 210/210 at .50" 113lsa 507 lift intake and exhaust.
Iv got a gas mixer and its in a tight spot in the van so looks like ill have to drill some holes or something to get some more air in there. It made 133rwkw with gas on the dyno last weekend