Leyland P76 Owners 2006 |
Technical problem |
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Detonation / Preignaition
[215V8yahoo.group]
- Date: Wed, 12 May 2004
- I guess I'm at a bit of a loss concerning the discussion of detonation and pre-ignition.
- The two engines with which I have experience are the Buick and Oldsmobile versions of the 215 V8 and neither has been sensitive to the above conditions.
- The Buick version was build with only 8.5 to 1 compression so I wouldn't expect much problem.
- The Oldsmobile version, using 41cc (small) combustion chamber heads -- along with Arias Arias Pistons, give about 13.5 to 1 and detonation/pre-ignition wasn't a problem.
- IT IS MY UNDERSTANDING that the Olds head is more forgiving in this regard but that it doesn't flow quite as well as
- the Buick head.
- The highest octane available in my area (higher altitude of 4,000 feet) is 91 on the R+M/2 scale.
- Initial timing was set at 10 degrees initial and only needed to be pulled back to 4 or 5 degrees initial when at sea level -- even with coastal octane of 92/93 octane.
- Are others having problem with detonation? I never have.
- Darius
- GRAYTESLA@AOL.COM
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Last updated
Dec, 2005 |
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