Supercharged LT1... what spark plugs and gap do you guys prefer??
#1
Supercharged LT1... what spark plugs and gap do you guys prefer??
I am putting a vortech s-trim on my 95 lt1 formula. I have done some research and found some people put ngk tr6 and some put autolite 104 on there lt1's, but I have not gotten any deffinate answers... also there are different opinions on gapping. Vortech told me 40-42 would be the correct gap. I am also wihsing to replace the plug wires with some stock replacements. Please let me know your guys opinions so I can make the best possible selection.
#5
Originally Posted by CALL911
It depends on your boost level. If you are over 13#'s of boost, you should run an Autolite 103. Almost all guys are gapping at .35, although some go a little smaller like .32
I have heard some guys having issues with the NGK plugs.
I have heard some guys having issues with the NGK plugs.
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Sounds like your motor is stock... With 9psi. Definitely upgrade your plug wires, the stockers and cheap stock replacements suck.
I ran TR6ix's in my stock motor with 10psi at .035
Now Im running Autolite Iridium plugs gapped at .024
I ran TR6ix's in my stock motor with 10psi at .035
Now Im running Autolite Iridium plugs gapped at .024
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#9
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Not sure of the autolite part numbers, but you'll need to go 1 heat range colder than stock. Im running 2 heat ranges colder but my engine is far from stock and we're maxing the blower out.
#10
Originally Posted by Fire67
Not sure of the autolite part numbers, but you'll need to go 1 heat range colder than stock. Im running 2 heat ranges colder but my engine is far from stock and we're maxing the blower out.
#12
Originally Posted by CALL911
Not sure between the 103's and the 104's. For my boost level, I know the 103's are perfect (15#'s), but not sure if it would still be good for your boost level.
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I have been running Champion RS12YC for the last 5 yrs. I am also at 9lbs on my LT1 and my ETs show the engine loves them. If you are not a Champion fan you could cross reference these.
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95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
#14
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Also, don't gap them any larger than .035.
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95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
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Call911- You will only need 1 heat range colder. NGK TR6 is one part# I positively know. If you go to Advance auto parts or AutoZone I KNOW they can cross reference it.
2 heat ranges will be too cold for your setup.
2 heat ranges will be too cold for your setup.
#17
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Originally Posted by burnzilla
On a stock internal LT1?
I would be looking at some forged rotating assembly kits.
I would be looking at some forged rotating assembly kits.
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95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
#18
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Originally Posted by Fire67
Call911- You will only need 1 heat range colder. NGK TR6 is one part# I positively know. If you go to Advance auto parts or AutoZone I KNOW they can cross reference it.
2 heat ranges will be too cold for your setup.
2 heat ranges will be too cold for your setup.
I will be running Autolite 3922's in my car this year.
#20
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Originally Posted by onefastbird95
Have you run 9psi on your stock bottom end or did you build it up? I have been told 9psi is a bit much for stock, people say to bump it down a couple psi... not sure the best route to go
Safely with a stock bottom end, and everything I listed above, I wouldn't go above 6#'s unless you are ready to buy a new block if the stock one goes.
Just my .02 cents. Everyone has their own opinion on this.