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#11 | |
Join Date: May 2007
Location: Chicagoland, IL
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#12 |
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We had some fluttering in the curve at top end. He suspected detonation. A/F was about 12.5 when it happened. Didn't feel it, just see it on the curve.
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#13 |
Join Date: May 2007
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You will usually see "fluttering" especially at top end. There's fluctuations that could have something to do w traction on the roller etc. There's also "smoothing" which is part of the software. I've bumped my timing up to 34d+ at top end and motor did not detonate, it just dropped in power. I'm pretty sure Marc's cal is more conservative than that. 12.5 is a bit fat IMO, but that will also be dependent on whether the overall tune is rich or lean. I'd also want to see what plugs look like.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#14 | |
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#15 |
Join Date: Feb 2004
Location: Ma
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Thanks. If you want to meet up in epping one day let me know.
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1990 ZR1 #2574 Medium Quasar Blue Metallic 1 of 19 |
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#16 | |
Join Date: May 2007
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Obviously you pull a few plugs and just make sure there's no aluminum pitting in the ceramic.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#17 |
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#18 |
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Dom, the plugs look to have sort of a grey color to them. The two I pulled have gone from the .0050 (at Marc's recomendation) to .0060. Iridium plugs.
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#19 |
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1990 ZR1 #2574 Medium Quasar Blue Metallic 1 of 19 |
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#20 |
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