9 spark plugs good for 450 hp ?
#1
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9 spark plugs good for 450 hp ?
I will be breaking in a new motor with the R85 single turbo.
I bought new plugs , all 9's and new wires. Will the 9's be good for when i turn up the boost after the break-in or do i have to go with 10's or 10.5? I have a streetport motor, and will keep the boost around 14-15 untill i buy my meth AI. I think i will be close to 450.
I bought new plugs , all 9's and new wires. Will the 9's be good for when i turn up the boost after the break-in or do i have to go with 10's or 10.5? I have a streetport motor, and will keep the boost around 14-15 untill i buy my meth AI. I think i will be close to 450.
#3
Racing Rotary Since 1983
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making over 400 rwhp w 9s just may not be a good idea.
if you inspect used rotor housings you often see cracks around the sparkplug boss. my guess is that the cracks are from too much heat. which is not helped by a plug that is less able to transfer heat.
plugs are easy to swap and are inexpensive compared to rotor housings.
if you are going to be standing on the gas my opinion is you need colder plugs. around town stuff.... 9s no problem.
i am not saying that 9s don't make as much power in the low 400 range, just that i don't like what i see on most used housings.
howard coleman
if you inspect used rotor housings you often see cracks around the sparkplug boss. my guess is that the cracks are from too much heat. which is not helped by a plug that is less able to transfer heat.
plugs are easy to swap and are inexpensive compared to rotor housings.
if you are going to be standing on the gas my opinion is you need colder plugs. around town stuff.... 9s no problem.
i am not saying that 9s don't make as much power in the low 400 range, just that i don't like what i see on most used housings.
howard coleman
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