Well I'm finishing up my new set up pretty soon here and I'm wondering which spark plugs to go with. I'll be running an LE 226/230 cam, LE2 Heads and ported intake manifold, Comp Magnum RR's, 37lbs Injectors, Walboro 255 fuel pump, and everything else is in my sig. I like to run NGK's so what would you reccomend? Thanks!

 

I'd ask Lloyd Elliot, but otherwise NGK TR55 or some Autolites always worked well for me.

-Dustin-

 

I'd go one step colder than stock, with the NGK TR6 or the Autolite 104.

 

Another vote for the NGK's tr6.

 

NGK part #4177 is the TR6 heat range for an LT1

 

x2!!!

 

I like the autolite 104 plus they are cheaper then ngk.

 

I went with autolite platinum spark plugs when I changed mine.

 

The rule of thumb is one heat range cooler per hundred additional horsepower. NGK TR6's are one heat range cooler than stock and wil work fine. An equivalent heat range from someone else will work just as well..

Try setting the gap to .035" instead of the stock gap...it'll idle smoother.

 

+1 for autolite 104

 

autolite 104

CC503 here

 

Ngk tr55 ix