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09-04-2007, 01:24 AM
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Registered User
Join Date: Jan 2004
Location: Duluth, Mn
Posts: 162
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Back from the track new best times.
At Brainerd this weekend my old truck which weighed in at 4150 lbs finally got its act together after many months of troubleshooting. Went 11.41 @8psi then I upped the boost to 14psi and it went 11.01. I still felt something was wrong so I took 3 jet sizes out of the secondarys and then it went 10.78, 10.76 and on the final pass of the weekend 10.68@124.8. I think it's still richer than needed but without a wideband I'm not taking anymore out. Also the old turbos are pretty much maxed out so an upgrade is going to be needed this winter. I also met some other board members while there which was pretty cool. You know who you are and thanks for stopping by.
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85 GMC 1/2 ton LWB 4150lbs. 383 SBC with Twin MPT70 Turbos 850 CSU carb TH375 3.70 gears Ultimate 10" Converter 10.11@136.6 with 1.64 60ft. on 10.5-31-15W 
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