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07-26-2006, 03:59 AM
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#1 |
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Registered User
Join Date: May 2006
Location: Poulsbo washington
Posts: 107
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tuning a 383
finally got my gm 375hp 383 tuned for 87 octane
 man did i lose power going for 3.54 gears and hopefully keeping the posi this weekend maybe help with mileage enought to run premium and get all my power back. i just got done getting my truck to quite pinging and was complaining to one of my friends about the power loss, we decided to go to town and his 96 swb ext cab couldent keep up!! with fuel injection and an auto with GREAT throttle response got owned by my carb sm425 on cheap gas with high compression!! it was awesome he looked at his pickup like it was dirt after that then i told him the mileage i was getting and he perked up  have a great day guys
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07-26-2006, 12:14 PM
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#2 |
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Registered User
Join Date: May 2005
Location: Texarkana, AR 71854
Posts: 397
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Re: tuning a 383
I have no idea what you said. But Congrats
__________________
2006 Titan SE Crew Cab Daily Driver 2005 Mazda Tribute (Wifes car) 1969 C10 SWB 350/3 Fleet "Max" 1969 Chevelle 2 door 350/3 |
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07-26-2006, 01:47 PM
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#3 | |
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Registered User
Join Date: Mar 2004
Location: Lexington, KY
Posts: 865
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Re: tuning a 383
Quote:
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"Green Monster" (Red Sox fan) 1970 GMC survivor, 350/200 4R, 3.42 rear gears, 2.5/4 drop, ECE disc brake conversion, powder coated suspension |
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07-26-2006, 05:18 PM
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#4 |
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Registered User
Join Date: Sep 2005
Location: 9000' Mountain Man
Posts: 326
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Re: tuning a 383
When I built my 11:1 cr 350, I had to limit my centrifugal advance otherwise I experienced severe pinging from 3000 rpm and up when using low octane fuel.
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07-26-2006, 06:38 PM
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#5 |
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Senior Member
Join Date: Mar 2004
Location: Nebraska
Posts: 583
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Re: tuning a 383
what kind of compresion are you runing. i got a 383 also just wondering what kinda problems i might run into.
thanks andrew |
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07-26-2006, 07:03 PM
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#6 |
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Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Re: tuning a 383
What GM crate did you get? ZZ383 or HT383? What kinda gas mileage are you getting? I know you're the one with the questions but I'm curious about your motor.
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.  
Last edited by Sweet72; 07-26-2006 at 07:04 PM. |
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