I am currently running Morotcraft AGSF32C plugs in my aluminum GT-40 heads N/A but when I add the S-trim what plug should I use? Do I need to run a heat range cooler? Which is the next cooler Motorcraft plug? What are you guys running?
Thanks,
I am currently running Morotcraft AGSF32C plugs in my aluminum GT-40 heads N/A but when I add the S-trim what plug should I use? Do I need to run a heat range cooler? Which is the next cooler Motorcraft plug? What are you guys running?
Thanks,
Jason
92 Notch w/ S-trim (6.87/2.95), 04 PMS, UPR pipe, WMS w/b, GT-40Y heads, Cobra manifold, B303, 1.6 stud r/r, 65mm TB, 80mm Pro-M, 42# injectors, FRPP balancer, FRPP aluminum rad, FRPP blue hose kit, Ramcharger fan, Edelbrock w/p, Canton 7qt pan, MAC 1 5/8" shorties, MAC catted H-pipe, Flowmaster cat back, MAC springs, Tokico HPs, MM c/c plates, Steeda X2s, MM adj. rears, Cobra brakes, 17" Cobra R's, 3.55 gears, aluminum d/s, Hurst, Cobra clutch, Kenny Brown subs + K-brace, Ultra-lites, MSD 6AL, GSS340-255lph intank.
Typically run 2 heat ranges colder plug than a stock application, not sure of the Motorcraft part# though.
Dart Block 331 and No Power Adder, currently in pieces...... :weird:Originally Posted by Kato Engineering
Used to run 6.90 @ 100.4 mph in the 1/8th
Anybody running aluminum GT-40 heads with a blower? What plugs are you using?
Jason
92 Notch w/ S-trim (6.87/2.95), 04 PMS, UPR pipe, WMS w/b, GT-40Y heads, Cobra manifold, B303, 1.6 stud r/r, 65mm TB, 80mm Pro-M, 42# injectors, FRPP balancer, FRPP aluminum rad, FRPP blue hose kit, Ramcharger fan, Edelbrock w/p, Canton 7qt pan, MAC 1 5/8" shorties, MAC catted H-pipe, Flowmaster cat back, MAC springs, Tokico HPs, MM c/c plates, Steeda X2s, MM adj. rears, Cobra brakes, 17" Cobra R's, 3.55 gears, aluminum d/s, Hurst, Cobra clutch, Kenny Brown subs + K-brace, Ultra-lites, MSD 6AL, GSS340-255lph intank.
You might.Originally posted by darknotch
Do I need to run a heat range cooler?
There isn't one, have to look elsewhere.Which is the next cooler Motorcraft plug?
I went from the [[EDIT]] NGK TR5 (std) to their TR6 (1 step cooler) and the plugs look *much* happier. The Autolite Race equivalent to the TR5 is the AR764, std. Autolite is 764, not sure if there is a cooler 763 or not...What are you guys running?
Last edited by fanglemeister; 12-04-2003 at 03:02 PM.
Chris
Go to NAPA and get 3923's.
That is the part number and they are very good plugs.
1993 notch, 357W forged pistons 9.2-1 comp,Vortech S-trim 3" / 8" pullies, AFR 185 heads, Trick Flow R intake, Anderson B451 cam, PMAS 80mm, 06 PMS, 60# injectors, 3.55 gears and PA SC C4, Dual Walbro fuel system. Best ET 10.35 @ 135mph
Interesting, the Autolite.com cross-reference for their race plugs shows the following:
Autolite AR3923 = Champion RC9YC = NGK BKR6E
Autolite AR3924 = Champion RC12YC = NGK FR5
Or looking at it from the NGK side 95 Lightning & Cobra-R:
NGK TR5 = AR764 = RS12YC
NGK TR6 = AR103 = RS9YC
I have the feeling the different numbers are minor variations in seat type and thread depth, but they should all work in the Y303s and GT40/Lightning heads wrt seat depth. I have the iron heads which may not need as much thread engagement as the alloy heads, so I can use the fully threaded long-reach plugs but the Y303 guys can't use the short-threaded long-reach plugs.
Here's the Autolite cross-reference
http://www.autolite.com/tech/RacingCrossRef.pdf
Last edited by fanglemeister; 12-04-2003 at 05:32 PM.
Chris
Chris- I've had this problem in the past, finding part#s for plugs for my iron GT-40s. I had NGKs (TR6s, but I don't think that is the part#, just heat range), that were 2 ranges cooler I think, and I've also run the autolite 764s (1 range colder). Is the AR103 and RS9YC 2 ranges colder then stock? The seats are different, on our GT-40 heads they are tapered, and stock heads are not(so not sure on the seat of the Champ plug), as for thread depth, not sure. I basically want to run the coldest plug I can with my iron GT-40s, and it is a PITA to find it, the 764s I've learned to accept. Any more info from anyone would be great, I know I'm not the only one.
-Rob
Actually, I think I answered my own question after looking at your link. I found this to http://www.accufabracing.com/denso_2.htm
I prefer to run the shrouded electrode spark plug. I use the AR3934 on my car. I have had the best luck with them.
Chris
9.05@152 with a T-Trim on BFG Drag Radials
NMCA SR6381
Chris,
What heads are you running?
Jason
92 Notch w/ S-trim (6.87/2.95), 04 PMS, UPR pipe, WMS w/b, GT-40Y heads, Cobra manifold, B303, 1.6 stud r/r, 65mm TB, 80mm Pro-M, 42# injectors, FRPP balancer, FRPP aluminum rad, FRPP blue hose kit, Ramcharger fan, Edelbrock w/p, Canton 7qt pan, MAC 1 5/8" shorties, MAC catted H-pipe, Flowmaster cat back, MAC springs, Tokico HPs, MM c/c plates, Steeda X2s, MM adj. rears, Cobra brakes, 17" Cobra R's, 3.55 gears, aluminum d/s, Hurst, Cobra clutch, Kenny Brown subs + K-brace, Ultra-lites, MSD 6AL, GSS340-255lph intank.
TFS Twisted Wedge. An AR 3934 is identical to the AR3924, but the center electrode is shrouded.
Chris
9.05@152 with a T-Trim on BFG Drag Radials
NMCA SR6381
hmm thanks chris.......one new thing to try this spring. You've tried them all i imagine?
89 Coupe with parts stacked inside of it and about 30#'s of dust on it with no end in sight. :weird:
Although I am collecting parts for a 12.5:1 393 :D
FYI
There does appear to be a Motorcraft plug cooler than the AGSF-32C for supercharged applications using the aluminum GT-40 head. www.spmotorsports.com/mustang_plugs.html suggests the Motorcraft AGSF-22C.
Jason
92 Notch w/ S-trim (6.87/2.95), 04 PMS, UPR pipe, WMS w/b, GT-40Y heads, Cobra manifold, B303, 1.6 stud r/r, 65mm TB, 80mm Pro-M, 42# injectors, FRPP balancer, FRPP aluminum rad, FRPP blue hose kit, Ramcharger fan, Edelbrock w/p, Canton 7qt pan, MAC 1 5/8" shorties, MAC catted H-pipe, Flowmaster cat back, MAC springs, Tokico HPs, MM c/c plates, Steeda X2s, MM adj. rears, Cobra brakes, 17" Cobra R's, 3.55 gears, aluminum d/s, Hurst, Cobra clutch, Kenny Brown subs + K-brace, Ultra-lites, MSD 6AL, GSS340-255lph intank.
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