when to use a hotter plug

[scarecrow0529]

i was wondering i had a bunch of work done on my engine like the head has been ported polished, shaved, bored etc. when should i use a hotter plug.

[MT-2500]

Originally Posted by scarecrow0529

i was wondering i had a bunch of work done on my engine like the head has been ported polished, shaved, bored etc. when should i use a hotter plug.

Model and year and engine might help.
I would be in favor of going 1 or 2 colder.
Check around some speed shops and see what they do for them or use in a case like that.
MT

[scarecrow0529]

yeah sorry 92 dohc

[Cat Fuzz]

You do understand what a spark plugs heat range refers to?

[PlayStation3]

Originally Posted by scarecrow0529

i was wondering i had a bunch of work done on my engine like the head has been ported polished, shaved, bored etc. when should i use a hotter plug.

and fyi your car is still going to be slow. all you need really was make the stock crank hp and turned that into the fwhp

[saturnspeed_12]

for that, i would use the stock plug range. when compression is bumped/forced induction is there, colder plug. other then that, stick to stock.