What plugs do you guys recommend for the lt1? Keep in mind my engine will be mostly stock. Just with ram air, headers, tune, and ported heads.

 

NGK TR-55's

 

factory ac delco double platinums. trust me worth the money.

 

+1 for factory a/c delco

 

Denso iridium.

 

I bought pair of NGK and month later it fouled one out

so i went with AC-DELCO 5 months later still going!

 

NGK TR55 all day long

 

are those e3's any good or does anyone use them?

 

NGK TR55 are almost always recommended for n/a motors.

 

ngk's here

 

NGK tr55's

 

NGK tr55's, no problems here

 

I've had bad luck with ngk's. Now I run autolites with no issues.

 

NGK TR55. no probs here

 

NGKs with no problems.

 

Ive had good luck with NGK's on N/A cars and autolites on boosted or sprayed cars.

 

autolite copper core.

 

Those recommending the Autolite, why don't you list a part number?

I never ran the aluminum heads on a stock motor but I am guessing 106 or in some cases maybe 104. I know the 106 is a touch hot for the iron head motors but I think it may be good for a stock aluminum head motor.

 

been using ngk's in lt1 and ls1 motors since always
various heat ranges, ngk tr55 are like 1.80$ where i get them
best plug for bolt ons lt1 or ls1

 

106's when I was running .039" felpro gaskets with stock chambers, and 104's with my new setup.