need help on spark plugs!

Reply Subscribe

Thread Tools

Search this Thread

Jan 11, 2008 | 05:04 PM

Disturbed Bird

Thread Starter

TECH Fanatic

iTrader: (9)

Joined: Jan 2006

Posts: 1,562

Likes: 0

From: Savannah, GA

need help on spark plugs!

its a high compression stage 2 PP LS6 head, 240/244/112lsa cam, ported F-90/90, 42# injectors and all bolt-ons.

what spark plugs do i need it should put down close to 550rwhp? N/A ONLY MOTOR!

and what gap?

Jan 11, 2008 | 05:05 PM

JPH

TECH Junkie

iTrader: (2)

Joined: Jan 2006

Posts: 3,776

Likes: 0

From: Fort Wayne, IN

i start off with NGK TR6, gapped at .035.

Jan 11, 2008 | 05:32 PM

ae13291

Banned

iTrader: (8)

Joined: Jun 2007

Posts: 3,093

Likes: 1

From: san fernando valley, california

i think the TR6 is used in forced induction applications! i could be wrong but get the Tr55 gap it around the .030's

Jan 11, 2008 | 05:37 PM

Viper

12 Second Club

iTrader: (6)

Joined: Dec 2001

Posts: 4,909

Likes: 3

From: Cleveland, OH

TR6 at .035 to .040.

If you want to take a TR55 to that level buy the TR5, it is suited to go lower as it starts at .040 (I think) whereas moving a TR55 down to .030 is too much movement on the plug IMHO. The TR5 is the same as the TR55 (heat range) just smaller gap whereas the TR6 has a different heat range AND smaller gap. With high compression and a lot of HP, your better off with the TR6 according to NGK. I'm running them at .042 with 431hp.

Last edited by Viper; Jan 11, 2008 at 06:03 PM.

Jan 11, 2008 | 06:00 PM

Disturbed Bird

Thread Starter

TECH Fanatic

iTrader: (9)

Joined: Jan 2006

Posts: 1,562

Likes: 0

From: Savannah, GA

ok thanks im going to go with the tr6 right now. ihave used them when i was using no2 so i know what to expect

Last edited by Disturbed Bird; Jan 11, 2008 at 06:42 PM.

Jan 11, 2008 | 06:36 PM

JPH

TECH Junkie

iTrader: (2)

Joined: Jan 2006

Posts: 3,776

Likes: 0

From: Fort Wayne, IN

Quote:

Originally Posted by Disturbed Bird

ok thanks im going to go with the t6 right now. ihave used them when i was using no2 so i know what to expect

good choice man. its always better to start cold first on a high compression motor, then work your way up in heat range from there if needed.

Mar 14, 2008 | 04:45 PM

DaddySS

TECH Addict

Joined: Dec 2001

Posts: 2,907

Likes: 1

From: Bergen County, NJ

Reviving this one - on the NGK site they list the Z06 as coming with TR6s but gapped at .054? The "stock gap" for the TR6 is listed as .044? So for N/A 11 to 1 compression LS1 at about 400HP to the wheels (465HP at the flywheel) what is the recommended gap?