What spark plugs to use with my Trickflows?
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From: Pelham, NH
Car: 91 B4C, 17 C7 GS, 16 Denali DMax
Engine: LS3, LS3, LML
Axle/Gears: 3.23, 3.42, 3.23
What spark plugs to use with my Trickflows?
My motor is all together and now I need to pick out a set of plugs to run in these heads.
Trickflow recommends:
Autolite 3924
NGK FR5
Champion RC9YC
Is anyone running an AC-Delco plug? I would prefer to run a Delco plug over these others. I am open to all suggestions.
Does anyone have any opinions on any of these?
Trickflow recommends:
Autolite 3924
NGK FR5
Champion RC9YC
Is anyone running an AC-Delco plug? I would prefer to run a Delco plug over these others. I am open to all suggestions.
Does anyone have any opinions on any of these?
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From: Northern CA.
Car: '82 Z28
Engine: 350
Transmission: TH400 4,000 stall
Axle/Gears: Currie 9", 4.56 gears
Just run a cross reference on one of those plugs to find an AC Delco plug. Parts store should be able to do that or you can use Google.
Joined: Jun 2003
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From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
I used the auto lites that they called for and went up one heat range. They worked great for me.
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From: Oswego, IL
Car: 1989 Iroc-Z
Engine: 350ci SBC
Transmission: 700R4
Originally Posted by Tibo
I used the auto lites that they called for and went up one heat range. They worked great for me.
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From: Port Angeles, Wa
Car: 1983 Camaro Z28
Engine: 584
Transmission: TSI Glide
Axle/Gears: Quick performance 9 inch
The autolites seemed to just foul alot easier then the champions or the NGKs I run NGK fr4 (one step colder) for my nitrous motor with trickflows on it. seems like the autolites just have to small of an electrode.
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Thread Starter
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From: Pelham, NH
Car: 91 B4C, 17 C7 GS, 16 Denali DMax
Engine: LS3, LS3, LML
Axle/Gears: 3.23, 3.42, 3.23
I got a delco number from Trickflow this morning. They told me to run a FR3LS but my napa guy looked into them and called a couple distributors and apparently they no longer make that one.
So I ended up going with the NGK FR5. They were something like $2/plug. That NGK plug is one of the other numbers I got from Trickflow.
So I ended up going with the NGK FR5. They were something like $2/plug. That NGK plug is one of the other numbers I got from Trickflow.
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From: St. Augustine, FL
Car: 89 GTA
Engine: 383
Transmission: 4L80E
Axle/Gears: 12 bolt-3.73
You can find the autolites in more shops than the ngk's. The gm FR3LS, FR2LS and FR1LS have been discontinued.
The autolite 3926 is the stock heat range. 3924 is one step colder, 3923 is 2 steps colder.
The autolite 3926 is the stock heat range. 3924 is one step colder, 3923 is 2 steps colder.
Joined: May 2001
Posts: 5,244
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From: Sac, CA
Car: '89 GTA
Axle/Gears: 3.27/9-bolt
Fast_25th - I have essentially the same setup just finishing up.
I'm picking up the Autolites, but I'm sure the NGK's are as good if not a bit better.
What do you expect your setup to run in the 1/4?
I've got the same heads/intake/rr's, just a milder cam.
I'm picking up the Autolites, but I'm sure the NGK's are as good if not a bit better.
What do you expect your setup to run in the 1/4?
I've got the same heads/intake/rr's, just a milder cam.
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From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
Originally Posted by 89gta383
You can find the autolites in more shops than the ngk's. The gm FR3LS, FR2LS and FR1LS have been discontinued.
The autolite 3926 is the stock heat range. 3924 is one step colder, 3923 is 2 steps colder.
The autolite 3926 is the stock heat range. 3924 is one step colder, 3923 is 2 steps colder.
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Joined: May 2005
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From: Windsor Ontario Canada
Car: 89 jaguar xjs convertable
Engine: 89 L98 5.7 TPI
Transmission: 700R4
Axle/Gears: 3.23 dana 44
Just a FYI ,as an application, use a 1986 corvette aluminum head plug. Thats what your autolite # crosses to. I run bosch platimum 4's in my trickflows. Very happy with them.
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