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07-11-2011, 07:39 PM
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#1 |
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Registered User
Join Date: Mar 2010
Location: gainesville florida
Posts: 18
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spark plugs question. confused
I have a 82 silverado with a 350. Has 492 heads and 9.5-1 compression. I swapped plugs. Went from r45ts to r43ts because of advice from a mechanic. Problem is now my idle rpms are lower and there is power loss. Do you have to advance timing with a cooler plug? Should I switch back to the hotter plug? Thanks in advance.
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07-11-2011, 08:31 PM
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#2 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: spark plugs question. confused
More compression = LESS gap. Less gap is needed to overcome higher compression pressure resistance. Have you tried using a different gap? What type of ignition do you have on it?
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07-11-2011, 10:40 PM
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#3 |
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Registered User
Join Date: Mar 2010
Location: gainesville florida
Posts: 18
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Re: spark plugs question. confused
Hei distributor. Gap is .35. Guess I should have set it at .45?
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