XR7 Dave
Registered User
Sorry guys, but if I have to repeat this one more time........
If you are running over 15psi you CANNOT run stock spark plugs or spark plug gap. It won't work reliably. Period, end of story.
You MUST run a cooler plug and you MUST gap it down. I have talked to, emailed, PM'd etc way too many people over the past months as we start to see more and more boost on these motors. The days of 250rwhp and 15psi are over. It is going to become very common to see 17-22psi boost with the new blowers and you just can not run an OE plug nor use OE plug gaps.
My recommendation to everyone running high boost is to simply purchase some Autolite 103 NON-PLATINUM spark plugs, gap them at .035", and go.
I fully understand that there may be a better plug and there may also be a place called "Heaven". But in the mean time, install a cooler plug that is known to work and get your car running correctly and tuned. Then, after you have that all taken care of you can experiment with something else if you want but in the mean time invest $16 in a set of the above mentioned plugs and gap them as directed.
Disclaimer: The above recommendation is only for people running high boost. If you run stock boost then if you want to run stock plugs that's fine. But you can't run stock plugs/gap at high boost. It doesn't work.
If you are running over 15psi you CANNOT run stock spark plugs or spark plug gap. It won't work reliably. Period, end of story.
You MUST run a cooler plug and you MUST gap it down. I have talked to, emailed, PM'd etc way too many people over the past months as we start to see more and more boost on these motors. The days of 250rwhp and 15psi are over. It is going to become very common to see 17-22psi boost with the new blowers and you just can not run an OE plug nor use OE plug gaps.
My recommendation to everyone running high boost is to simply purchase some Autolite 103 NON-PLATINUM spark plugs, gap them at .035", and go.
I fully understand that there may be a better plug and there may also be a place called "Heaven". But in the mean time, install a cooler plug that is known to work and get your car running correctly and tuned. Then, after you have that all taken care of you can experiment with something else if you want but in the mean time invest $16 in a set of the above mentioned plugs and gap them as directed.
Disclaimer: The above recommendation is only for people running high boost. If you run stock boost then if you want to run stock plugs that's fine. But you can't run stock plugs/gap at high boost. It doesn't work.