Spark Plug Questions

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Jul 28, 2010 | 11:33 AM

AnnivSS

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From: Lewisville, TX

Spark Plug Questions

I currently have NGK TR5's at .38 Gap. This was done at the advise of a local chevrolet dealership. Im thinking the car could be made to run a little better with a plug and or a gap change. Whats the absolute best plug and gap to run on a stock ls1. AcDelcos or TR55's? And at what gap?

Thanks.

Jul 28, 2010 | 11:36 AM

02*C5

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From: Az

Tr5 or TR55 are r same plug you need to take them out and gap them to .55 and you should be running much better.

Jul 28, 2010 | 11:57 AM

Charlay

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Not trying to thread hijack but I always wondered what gaping the spark plugs did? I run NGK's all the time but I just take them out of the box and put them in with no gap change. Your saying changing the gap will make it run better and I've heard that from others on here too but never looked into it and was just wondering if I should ...

Jul 28, 2010 | 11:58 AM

Sales2@Texas-speed

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Agreed, if you're not spraying any nitrous and don't have higher than stock compression, change them out for a TR55 and gap them .050-.055"!

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Jul 28, 2010 | 02:15 PM

ryle

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sorry to

but What kind of gap should you run if you have a higher compression motor.. say 11.3:1

Jul 28, 2010 | 03:13 PM

AnnivSS

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From: Lewisville, TX

Quote:

Originally Posted by Matt@Texas-Speed

Agreed, if you're not spraying any nitrous and don't have higher than stock compression, change them out for a TR55 and gap them .050-.055"!

Ok, now that weve established that, Ive been told it will make it run better but what in effect does gapping them do to the motor. Sorry if thats a noobish question but ive always asked what and never asked why.