- Apr 28, 2005
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I got my car back a few days ago after getting new crank and rod bearings put in after spinning a few. I also go a Accufab 75mm Tb/ Plenum put on. Well, while they were tuning it, my car kept leaning out at high rpms and they had to decrease the timing by six degrees. My car dynoed at 285 rwhp and 302 rwtq before Accufab TB/plenum. With the new tune and TB/Plenum, it dynoed at 277rwhp and 298rwtq. Keep in mind that I have a built motor with heads, cams, and Lt's, etc. Isn't that some crap? The tuner was saying a lot cars have been experiencing the same problem with the new gas and saying the new gas with extra ethanol is too oxgynated. Has anyone else noticed a difference in power with the new gas?

Man that sucks...I thought it would be good too. Your power is WAY low with that stupid fuel. man it may be worth it to dump an ocatin booster in the gas on every fillup. Tell the tuners to richen your A/F, then they should be able to add in the timing. I think 13-1 is WAY lean for eothenal...could be the issue too.


