Twin-charged Bonneville Update
Joined: May 2006
Posts: 29,661
Likes: 43
From: Sheboygan Wisconsin






I found this today and thought about your problem. Have you seen this? http://www.zzperformance.com/grand_p...=333&catid=108
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Senior Member
Posts like a Turbo
Joined: Jan 2005
Posts: 368
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From: Atlanta, GA. USA

cool! Thanks man. I found that even in PE mode, the pcm was ADDING desired a/f ratio less than 50% throttle. Adding back 2-POINTS from my target 11.7 whic is 13.7!!!! At 16psi boost even at 35-40% throttle (medium load) 13.7 is WAYYY to lean. I had fixed this last summer when I started tuning with HP tuners. My transmission is stand-alone now, Full manual shift automatic. www.e-transcontrol.com
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Senior Member
Posts like a Turbo
Joined: Jan 2005
Posts: 368
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From: Atlanta, GA. USA

Well, I finally got around to putting this thing back together. I splurged for a set of ss oversize valves. I had them installed and the heads cleaned-up. Here'* what I am putting back on the engine. I am using Cometic gaskets prepped as per ZZP recommendations. The valve installed height came in about .025" shorter than stock... I am hoping the lifters have enough pre-load to take up the slack. If not, I will need new, longer pushrods.
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