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10-11-2011, 12:50 PM
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#1 |
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Registered User
Join Date: Mar 2009
Location: norman okahoma
Posts: 269
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BBC timing question
I've got a .030 over 454 with 10:1 compression and a .615 lift cam.
What do I need as far as timing? I'm running 91 pump gas and I'm conserned about not hearing detonation. Currently have 18 initial 38 total, all in by 3000RPM.
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The TEAL GMC build thread is HERE 1972 GMC SWB 454 oval ports TH400 fastest 1/4 mile time so far 13.05 @ 104 If you think you have too much horsepower you obviously have a traction problem ! |
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10-11-2011, 03:01 PM
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#2 |
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Senior Member
 
Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: BBC timing question
Can not see why you would need more than 36 degrees total.
Jimmy
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60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic |
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01-19-2012, 09:16 PM
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#3 |
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Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: BBC timing question
The big blocks I have run on the dyno all liked 34 degrees of timing the best. I would start there and see how it does.
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miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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01-24-2012, 12:54 AM
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#4 |
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Registered User
Join Date: Jul 2011
Location: Moorpark, California
Posts: 159
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Re: BBC timing question
I have 20 degrees initial and 16 in the distributor all in by 3000. I use an 850 carb and a Crane solid roller with .636 lift. Big block Chevy 489 cubic inches with Brodix heads. I also agree with 68TT. After all he has run some engines on a dyno and most of us have not. Running 20 degrees advance also solved my cooling problem. With 12 degrees advanced it ran 220 now it runs 180 all day long. I also run 10:1 compression.
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