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Author Topic:   spark plugs
P5Racing
Dirt Full Roller

Total posts: 41
posted April 06, 2003 08:38 PM
i run ac 45 plugs and 74 jets in the carb.
i am running hot an was told to go up on jets. a the plugs were to hot.
my question is can plug make you run hot. an if you go up on jets do i need to change plugs. i may go up to 78 jets

racer17j
Dirt Forum Champ
Total posts: 1565
posted April 07, 2003 01:25 PM UIN: 54865418
you might have some timing or other issues but fattening it up with jets might help what do the plugs look like? thats all we ever run in our gas engines and never had troubles. usually it's to lean or not enough timing to cause over heating if it's in the engine could be a cooling system matter also

rico 08
Dirt Freak

Total posts: 372
posted April 07, 2003 05:16 PM
a 45 heat range is on the hot side,i always ran a 44 which is what gm puts in high performance engines,don't think a 43 will be hot enuf tho.

NYhick
Dirt Forum Racer

Total posts: 82
posted April 07, 2003 09:57 PM
Retarded timing will make your manifolds get real hot, kept melting off plug wires so I checked my timing and it was wayyyyy off. You definitely need to check your plugs and see if jetting is necessary..... good luck

limitedmod45d
Dirt Roller

Total posts: 9
posted April 18, 2003 12:03 AM
what kinda carb we run 74s in our 350 cfm carbed motor with 45 plugs with no prob sounds like a cooling prob. I had a bad radiator last year the cap wouldnt seal the neck of the radiator was too deep it wouldnt even be hot and would start spraying water then get hot changed radiators and no more probs knock on wood

racinrich1
Dirt Full Roller

Total posts: 42
posted April 18, 2003 05:59 AM
If overheating is caused by carb/plug problems, The plugs would be very light in color and most likely blistered...If they read tan to light brown, look elsewhere for your overheating problem..
Rich

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