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Posts: 34
Join Date: May 2007
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What plugs? -
05-17-07, 12:02 PM
I've heard differing opinions on spark plugs, but since I didn't really know when building my motor I just put in the AP24's. I've heard this is wrong for a built N/A or a supercharged motor? Any opinions?
92 Mustang coupe, 331 stroker w/ 10:1 compression and 5-speed Tremec (N/A). The motor was professionally done and only the block was reused. I upgraded to 30#injectors, 190gph fuel pump, msd coil, bbk ssi intake, cold air, cc 1.6 roller rockers, World Windsor Jr. iron heads, chip, shorty headers, deleted smog, high flow cats, flowmasters, 70 mm TB, 73mm MAF, SRP forged pistons, 5.4” H-beam rods, 4340 steel crank, balanced @ 28 oz, billet steel flywheel, etc.
Lunati Custom Cam 110/118 lobes, .548" lift, 230/237 dur. @ .050
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Banned
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Posts: 271
Join Date: May 2007
Location: illinois
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05-19-07, 04:29 AM
I say you should use the autolite 25`s
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Official Member
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Posts: 854
Join Date: June 2003
Location: Norman, Ok
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05-23-07, 03:10 PM
not to thread jack, but are the basic autolite platinums any good for a mild combo?
87 GT 256rwhp/285rwtq w/ a 10.3:1 a/f 
308 rebuilt by me, Ross forged pistons, cobra intake, thumpers with 1.94/1.6s, afm n-412 cam, 65mm tb, sn95 maf, 255lph fp, 1.6 rr's, kirban afpr, u/d pullies, KC clutch, pro 5.0 shifter, 4.10's, hedman L/Ts, 2.5" H pipe, spintech prostreets, frpp alum d/s, MAC c/c plates, MSD 6al, 3G alt, full length sfc, UPR uca's/lca's, tokico shocks/struts, maxspeed springs, HID 5000k
R.I.P
my big brother Jimmy Sieber 9/14/82 - 3/13/07
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Posts: 362
Join Date: September 2005
Location: Columbus, OH
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05-23-07, 07:28 PM
Cenok-For some reason, the stangs don't seem to do well with platinum, at least in my experience. I now use copper exclusively.
357W
9.7:1 CR
Eddie Performer RPM 2.02 heads/intake
Comp cams 274XE cam
70mm TB
95mm PMAS Velocity
42 lb Inj
A9L w/ AFM PMS V4
KC Clutch
3.55's,
73MM fronts
Eibach Pro Kit.
All topped off with a teeny little puff of giggly gas.
Quote:
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Originally Posted by DeVus1
Clearly that guy is Sofa King We Todd Did.
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Member
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Posts: 34
Join Date: May 2007
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plugs -
05-29-07, 01:51 PM
so I changed my plugs (along with fixing vaccum & oil leaks and adding a phenolic plenum spacer) and the car runs freakin AWESOME.
I had the autolite platinum 25's @ .040 and went to the copper & cooler autolite standard 24's @.035 b/c builder thought might be getting spark blowout @ 10:1
Definately the standards but I think gap for build.
Last edited by jballa; 05-29-07 at 01:52 PM.
Reason: wrong compression
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Official Member
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Posts: 139
Join Date: January 2006
Location: Port Orchard, WA
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07-07-07, 01:06 PM
I use A/L 23's gaped to.035. Two steps colder than stock and great for my nitrous and boost.
-Red 93GT Turbo 6spd
No numbers yet 
-89 Notch 5.0 5spd. Former 4cyl auto.
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Official Member
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Posts: 182
Join Date: September 2006
Location: St. Louis, Missouri
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08-11-07, 02:21 PM
+1 Autolite
1987 GT 5.0 Pro Magnum 1.7 rr's, Comp springs, hardened rods, E303, BBK cai, Pro-M 75mm maf, BBK 70mm tb, Cobra int p&p, E7s p&p w 3-angle, Holley fp, MSD 6AL, MSD 8.5mm wires, Hedman l/t, Flowmaster o/r h, T5, alum d/s, KC clutch, Hurst s/t, 3:55s, FR udp, smog del, Moroso steel mm's, MM SFCs
2004 WRX 2.0 optimized intake (K&N), GP Moto maf inlet, p&p tb, p&p intercooler, Samco ic hoses, STI axleback, Perrin pulley
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Deputy Dawg
Man woods surround my office.
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Posts: 562
Join Date: November 2005
Location: NC
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08-11-07, 03:12 PM
Autolites are your best bet.
Nick
5.0 MOD
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Originally Posted by DMAN302
ahhh...the sarcasm...the stabbing of the back...God bless stangnet.
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Originally Posted by srothfuss
I thought of a great reply about "feeling fast" but I deceided that I didn't want the gingerbread man to catch me with any type of ban hammer....
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baby
Last edited by 85ragtop; 08-11-07 at 03:13 PM.
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Official Member
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Posts: 231
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08-21-07, 09:26 PM
Would the copper autolites be best bet just for forced induction/NoS equipped stangs or all in your opinion? Am running platinums here atm myself and am not very impressed.
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Member
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Posts: 13
Join Date: July 2007
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08-31-07, 08:28 PM
I like the copper autolites for everything. I run them on my 91 sc gt and the 88 2.3l.
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Posts: 12,623
Join Date: February 2001
Location: Revere, Massachusetts
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08-31-07, 08:34 PM
Quote:
Originally Posted by Fox8950
Would the copper autolites be best bet just for forced induction/NoS equipped stangs or all in your opinion? Am running platinums here atm myself and am not very impressed.
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Copper is a better conductor of electricity than platnium so it offers a better spark.
With th3 5.0's they tend to like the stock OEM Motorcraft/Autolite 25 plugs.
A step even better are silver plugs, but i don't think they make them to fit the 5.0 yet...plus they are $8-9/plug.
Mike
-- 2003 Mustang GT -- FOR SALE
Silver Metallic w/Drk. Charcoal + Bullitt wheels
-- 1988 Mustang LX 5.0L--
Black/Black + '97 Cobra wheels
5.0 Tech/5.0 Talk Moderator
WTB: (1) Fox seat power harness plug + 4" wire
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