Spark Plugs

[ProjectWE4]

Hey what is everyone using for spark plugs. I know that the heads are different on the TTA vs the TR. Looking just for some information on whats good or whats not.

[LV GN]

the gallina's used cr42LTS (ac delco) on the race tta

[TTA850]

Same here, R42LTS AC Delco plugs

HTH,
Steve

[ProjectWE4]

what are you gapping these plugs at??

[ProjectWE4]

what are you gapping your plugs at??

[joejakegrace]

whatever the SM called for and it ran like a bear. I'll check tonight if you don't have the SM.

[chicagoTTA]

R42LTS , and I *think* it's a TIGHT .34

[phillyturbosix]

yep.. AC delco is the only way to go. Tight .34 works well. I just put a new set in my car and she runs great. There was denso's in there before and I didn't like em. Here is how different the TTA plugs are as to what the GN takes...

[GMC-YA]

I like NGKs, if you read around youll find that most people that have tried them stayed with them. I forget the number off the top of my head.

[TT/Ameasap]

R42LTS gapped at a tight .32 I run 25psi of boost all the time

[Sweet6]

What does a tighter gap at high boost do?

[TT/Ameasap]

A tighter gap reduces spark blow out from occurring at higher copmression levels.

You can hear your engine miss at high boost levels when the gap is too wide.

Bo

[Sweet6]

Where are you guys buying the Delcos from? Dealer? Autozone and Murrays do not carry them.

[idaho gn]

why not just put the same plugs in that it ran 10.70 on?.........

[iwantatta]

Bought mine from Pep Boys. They were the only ones in the neighborhood that actually had them in stock.