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Turbo W/AFR heads Plugs ?JuicedSC 04-26-2005, 06:46 PM I was trying to find out what would be the best plug to run with my setup ? It is an LT1 with turbo running 20+ psi. I was running a TR6 but was told to run a colder plug. Which set would be optimal for reliability with high RPM use ? Thanks Mike LT4ultraZ 04-27-2005, 01:25 PM I run a autolight 103's on 15lb of boost and 100 shot of juce, i was running 104's with 15lb no problem. but sparkplugs are not the limiting factor for high RPM use as far as i know. The OPTI crap, ignition and valve train will be your limiting factor. JuicedSC 04-27-2005, 07:46 PM We have already spun the motor to 7200 rpm without a problem on the ignition, so i am not worried about that. yellow Z28 04-27-2005, 08:46 PM what size turbo are you running? and how much power are you looking to make?? engineermike 04-27-2005, 10:31 PM Autolite 3922's are pretty cold and they have the gasket seat that the AFR's require. JuicedSC 04-28-2005, 09:06 AM It is a T-88, and hoping to make 900rwhp. mehoffz24 04-29-2005, 07:07 PM shouldnt use a 103 or 104 style plug with no gasket... autolite 3922 3923 3924 14mm 3/4 reach 5/8 hex plug coldest to hottest. probally wont want to go hotter then the 3923.. JuicedSC 04-29-2005, 07:56 PM thanks for the info, I have decided to run the NGK R5762-8 mongse_1 05-02-2005, 01:20 PM Autolite 3922's are pretty cold and they have the gasket seat that the AFR's require. Ding ding ding! That's very important w/ AFRs. I used to have a x-reference sheet for AutoLite, Champion and NGK, but I think it's lost in the garage. :( | ||