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Old 01-22-2022, 11:36 PM   #1
Vhp04
 
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Spark plug NGK 6510

I got A little over 1,000 rwhp, and I just put this NGK 6510 spark plugs but they came at .040 is that good or should I close them down a bit. want my car to be running the way it should it wonít hurt it if I leave it how they came?
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Old 01-23-2022, 12:17 AM   #2
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Quote:
Originally Posted by Vhp04 View Post
I got A little over 1,000 rwhp, and I just put this NGK 6510 spark plugs but they came at .040 is that good or should I close them down a bit. want my car to be running the way it should it wonít hurt it if I leave it how they came?
Depends on your boost bud. If over 15lbs of boost gap them at .028
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Old 01-23-2022, 08:44 AM   #3
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What about for a ported stock blower at say 10Ė12 lbs of boost? .032ish?
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Old 01-23-2022, 07:11 PM   #4
radz28
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I think JRE's been pushing around .040" for up to that boost.

I'm at about 700, and just put in 6509s, and with about 15-lbs, and .040", it sure is snappy.
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Old 01-23-2022, 07:26 PM   #5
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Originally Posted by radz28 View Post
I think JRE's been pushing around .040" for up to that boost.

I'm at about 700, and just put in 6509s, and with about 15-lbs, and .040", it sure is snappy.
It’s not going to make anymore power or run better at .040. I can’t run .040 on mine, I tried once, misfires once it gets close to 15psi. The coils/wires etc have enough voltage to jump the gap but blowout becomes an issue.
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815rwhp/760rwtq - 93 | 850rwhp/765rwrq - E40 SAE

Magnuson 2650 90mm upper w/13% lower (9.06)
CSP Big Boy Cam w/32% fuel lobe
Heads done by LME (Full new Valvetrain)
NW 103mm TB
Roto Fab Big Gulp
CSP 2" Headers w/Green GESI Gen 2 Cats
Borla 3" Full Cat Back w/ S-Type
Mighty Mouse Wild Catch Can
Custom Holley Low side Fuel system
Forced Inductions Interchiller w/2 gallon fender tank.

Last edited by Camaro1973; 01-23-2022 at 07:50 PM.
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Old 01-23-2022, 07:28 PM   #6
radz28
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Originally Posted by Camaro1973 View Post
Itís not going to make anymore power or run better at .040, a burn is a burn. I canít run .040 on mine, I tried once, misfires once it gets close to 15psi.
I'm only offering what's been posted here, as best as I can remember, and my experience. You're making a lot more power than I, so I don't know that I would be surprised by your experience. I'm certainly no expert
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Old 01-23-2022, 07:28 PM   #7
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Quote:
Originally Posted by CW3SF View Post
What about for a ported stock blower at say 10Ė12 lbs of boost? .032ish?
A safe bet IMO would be .032 . Itís not worth risking spark blowout at .040, esp with no difference except a possible smoother idle.
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Magnuson 2650 90mm upper w/13% lower (9.06)
CSP Big Boy Cam w/32% fuel lobe
Heads done by LME (Full new Valvetrain)
NW 103mm TB
Roto Fab Big Gulp
CSP 2" Headers w/Green GESI Gen 2 Cats
Borla 3" Full Cat Back w/ S-Type
Mighty Mouse Wild Catch Can
Custom Holley Low side Fuel system
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Old 01-23-2022, 07:35 PM   #8
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Quote:
Originally Posted by radz28 View Post
I'm only offering what's been posted here, as best as I can remember, and my experience. You're making a lot more power than I, so I don't know that I would be surprised by your experience. I'm certainly no expert
I mean if the car is mostly stock esp with no cam running the highest gap is mainly better for idle. Iíve seen no performance improvements with a larger gap.

Basically you want to run the largest gap you can without spark blowout.

Stockish 9-11 psi is good for .040
Modded 12- 13 I like 0.32
14-17 I like 0.28

This is JMO but I think these gaps work best.
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815rwhp/760rwtq - 93 | 850rwhp/765rwrq - E40 SAE

Magnuson 2650 90mm upper w/13% lower (9.06)
CSP Big Boy Cam w/32% fuel lobe
Heads done by LME (Full new Valvetrain)
NW 103mm TB
Roto Fab Big Gulp
CSP 2" Headers w/Green GESI Gen 2 Cats
Borla 3" Full Cat Back w/ S-Type
Mighty Mouse Wild Catch Can
Custom Holley Low side Fuel system
Forced Inductions Interchiller w/2 gallon fender tank.
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