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GMC V6 and V12 Engines Engine repair and rebuilding |
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#31
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.060 on Champion plugs?
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"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#32
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Yeah probably not the best idea but, hey it runs. I got the correct AC Plugs to replace them.
Another question, Different topic, Is full 3" exhaust too big? Using the stock manifolds and down pipes then 3" thru flowmaster 50s. |
#33
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What gear ratio are you running? If you're in the 3's 2 1/2 inch pipe diameter will be more than adequate. I you're at 4.56 then 3 inch will be fine.
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#34
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__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#35
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That's why I didn't like the idea of stretching out the gaps on non HEI plugs because you don't really get a true gap at even .055 maxed out
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#36
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__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#37
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which plugs are you using?
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#38
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I'm using R44XLS6 in my 478M which is one step hotter for 7500-8500 series trucks that came with this engine, though it's in my 68 3/4 ton 4wd pickup it should be fine, the heat range is just right for the 351E. I'm sure it could be cross linked to a step colder or hotter if need be. Funny thing is the plug is for a 90's 4 cylinder GM application and it has the correct 3/4 in reach for most GMC V6 application
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#39
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__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#40
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44 is actually the right heat range for a 64-65 305E, I think you'll be fine
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