My question is when you have a set of heads fulley ported and polished should have 4 to 5 threads showing inside the combustion chamber
cylinder heads
- Thread starter jockeyshift
- Start date
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When I got my heads back from the porter I was looking at the combustion chamber. I screwed in a spark plug and there was 4 to 5 threads showing in side the chamber
you probably have the wrong plug.
440 source heads 3/4 reach plugs
pishta
I know I'm right....
LA or B? you want the spark kernal in the cylinder, not the plug threads.
B block
Agreed, a shorter reach plug would be what you are after.
pishta
I know I'm right....
My bad, I thought your plug was down in the hole. You need the right plug reach.
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I just found a pairagraf in Max Performance Mopar that said this was done by bad machining
TrailBeast
AKA Mopars4us on Youtube
I think you might have misunderstood what you read, because there is no machining done on a port job or head shaving that involves the plug reach.
You need a 5/8 reach instead of the 3/4 is all.
No they remove the hump that covers the spark plug inside the combustion chamber
TrailBeast
AKA Mopars4us on Youtube
I don't think they make a plug in in that length any way now the chamber is not 84 cc
fratzog lover
Well-Known Member
How about a pic?
pishta
I know I'm right....
Did they remove the plug "bump" like this one? Try a NGK BPR5HS plug with a 12.5 mm reach instead of the "3/4" (19mm) reach 440source head.
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thanks i will try that plug and yes they took that hump off
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