cold spark plugs
#4
Former Moderator. RIP Icemark.
are you eating plugs or having detonation issues that you want to go with a colder plug???
Colder plugs will often result in cold fouling leading to cold start flooding on our cars.
Colder plugs will often result in cold fouling leading to cold start flooding on our cars.
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#9
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hey j rat. i leaned it out to about 11. af ratio and it raps out smooth all the way to redline, no misfire. pulls like a raped ape.
i did some research and the denso iridium trailing plugs (ireo1-31) are equivalent to a heat range of 10 and the 32s are a heat range of 10.5
the 31s are used as stock replacement in iridium,
i did some research and the denso iridium trailing plugs (ireo1-31) are equivalent to a heat range of 10 and the 32s are a heat range of 10.5
the 31s are used as stock replacement in iridium,
#11
Former Moderator. RIP Icemark.
The NGK Iridiums might be a good choice as well, the RE10CL would be a step colder than the 9 for the leadings, and about half the price of the Denso IRE01-31.
The RE9BT would be a 9.0 for thr trailings.
Note that the NGK Iridiums for the rotary engines, use the CL and BT designation to reference the surround of the tip. The CL plugs (normally used in the leading position) have slots in the ground plane:
while the AL and AT and BT designated tips
use a flat surround.
The slots in the CL series help prevent low temp fouling.
The RE9BT would be a 9.0 for thr trailings.
Note that the NGK Iridiums for the rotary engines, use the CL and BT designation to reference the surround of the tip. The CL plugs (normally used in the leading position) have slots in the ground plane:
while the AL and AT and BT designated tips
use a flat surround.
The slots in the CL series help prevent low temp fouling.
#14
Former Moderator. RIP Icemark.
Originally Posted by turbine
hey icemark
have you used the ngk cl series? and will the iridum electrode help with fouling at all
have you used the ngk cl series? and will the iridum electrode help with fouling at all
I have not had any issues using the 7, but then I am only running 7 lbs of boost.
Remember they need to regap'd to around .032 or .030, to run in a FC as they come gapped at .048, something our coils won't run
#17
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Originally Posted by turbine
1 bar of boost on 92 pump gas
Are you running a Haltech?
What kinda ms are you running on the ignition?
Try pushing it up to 5.0 or even as high as 5.5 (don't go over 5.5) on the stock coils for better spark?
I don't worry about running colder spark plugs unless I'm running race gas over 20psi of boost.
Anything under that should not require cold spark plugs.
BTW, the NGK "Racing" 10.5 / 11 / 13 heat range spark plugs are $35 each.
-Ted
#18
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Originally Posted by RETed
It's not your spark plugs...
Are you running a Haltech?
What kinda ms are you running on the ignition?
Try pushing it up to 5.0 or even as high as 5.5 (don't go over 5.5) on the stock coils for better spark?
I don't worry about running colder spark plugs unless I'm running race gas over 20psi of boost.
Anything under that should not require cold spark plugs.
BTW, the NGK "Racing" 10.5 / 11 / 13 heat range spark plugs are $35 each.
-Ted
Are you running a Haltech?
What kinda ms are you running on the ignition?
Try pushing it up to 5.0 or even as high as 5.5 (don't go over 5.5) on the stock coils for better spark?
I don't worry about running colder spark plugs unless I'm running race gas over 20psi of boost.
Anything under that should not require cold spark plugs.
BTW, the NGK "Racing" 10.5 / 11 / 13 heat range spark plugs are $35 each.
-Ted
thanks for the info i will give that a try.
do you run the stock heat range or 9s all the way arround
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