ZR-1 Net Registry Forums - View Single Post

efnfast · 05-04-2013

This is from Marc H.

Hi Steve,

For high load operation I recommend a spark plug that is one AC heat range cooler than the OE plug. The best spark plug is the NGK TR7IX. Part number 3690.

It has a tapered seat. All LT5's are machined for both tapered and flat seat plugs. Carefully open the gap to .050"

Best of luck.

Marc

Somewhere is is recommended to over tourque the plugs if using a tappered seat for the first time and then backing off. I see if I can find that. -Steve

05-04-2013	#2
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,574	Re: Spark Plug Removal Question This is from Marc H. Hi Steve, For high load operation I recommend a spark plug that is one AC heat range cooler than the OE plug. The best spark plug is the NGK TR7IX. Part number 3690. It has a tapered seat. All LT5's are machined for both tapered and flat seat plugs. Carefully open the gap to .050" Best of luck. Marc Somewhere is is recommended to over tourque the plugs if using a tappered seat for the first time and then backing off. I see if I can find that. -Steve