what are the best spark plugs to use on racing engines that are using a blower?? i know they recommend different type plugs for blower motors and just wondering if anyone has any experience here???

I like NGK's. Run a plug somehwere in the heat range of an AC R41T. I ran NGK UR5 plugs in my hopped up 525SC.

I like the NGK R series plug,suppose to be hand made? and there shorter,The Scarab I ran a R5674-8, same plug I run on my NOS street/race car ,7's no NOS.The camaro is a Champion race plug C59CX and 57

I run the AC42ts in the Hustler they seem happy



It really personal preference on what ya like

I have a few for sale
http://s35.photobucket.com/albums/d1...%20for%20Sale/

I run accel U-groves, work well in the boats as well as my top sportsman race car....they are shorter as well....and easier for me to get thru my warehouse...Rob

I know NGK is a good quality plug. I am sure everyone has their preference, but if the plugs are for the engines Dave built for you, then I would stick with the plugs that Dave dyno'd your engines with. He has his reasons for what he uses....and they're usually not NGK's.

Are you bringing your engines back up to Dave's shop for a refresh???

When I built my Whipple motors, Dustin recomended I use the NGK R5674-8 for my motors.

Autolite AR3935

Autolite,,,,,,,,as in Automobile ?????

We have Boats ,,,so we need Boatlite. Hahaha