C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Dec 29, 2022 | 02:50 PM
  #441  
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AFR looks good.

Investigating is required. *I* think you should be trapping 98...ish. I mean, if I was trapping 95 with my shorty headers 305....
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Old Dec 29, 2022 | 07:04 PM
  #442  
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Originally Posted by James C4
The launch on my 14.08 was definitely the best launch I've ever had. Road the clutch a bit more than I would've liked to but had absolutely no slip and took off.

Yes it is 30* at WOT. That's still unchanged from the tune provided but Power Enrichment is enabled at that point so I'm getting an AFR of about 12. The injectors are technically stock but I had the throttle bodies rebuilt by Dr. Injector so the injectors were cleaned and tested then.
General rule of thumb for 350 chevys is about 35 degrees of advance at WOT and full load. Mine likes 36 deg. You often see big gains on a dyno when the timing is moved towards 35 and then when it’s around the mark the gains are only one or two HP.
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