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#1 |
Registered Member
Join Date: Jul 2003
Location: canada
Posts: 74
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![]() i have an 88 gt not stock but, i need to know the gap of the plugs before i put new plugs in it.
i didn't gap the last ones b/c i didnt know but i want to do everything right so i must gap them this time thanks ![]() |
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#2 |
Registered Member
Join Date: Jul 2000
Location: Norman, Oklahoma, USA
Posts: 597
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![]() I believe it's something like .054 inches, which would be 54 thousanths of an inch. I may be wrong.
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Michael Black QuantumMotorsports Norman, OK 1984 LX Hatch 306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat. Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites |
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#3 |
2 Stangs in the Stable
Join Date: Apr 2002
Location: Baytown, TX
Posts: 1,209
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![]() .054" is the stock gap. Need more info on what exactly "not stock" means.
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'90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! ![]() ![]() 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128 |
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#4 |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
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![]() i say .045, if you have a stock coil, and are n/a
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84 gt350 89 lx vert 92 lincoln lsc. All Forced ( one way or another) |
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#5 |
Registered Member
Join Date: Jul 2003
Location: canada
Posts: 74
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![]() well its not all stock anyway
f cam,65mm tb,underdrives,ported stock upper and lower intake,ported and shaved heads. yes i know i need to get rid of the stock intake but i dont have the money for a gt 40 intake ![]() so should i use the gap of .054 or ??? |
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#6 |
Undescribable
Join Date: Sep 1998
Location: Ft Myers Fla
Posts: 1,539
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![]() .054 will be fine.
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Rice Haters Club Member #101 |
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#7 |
Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
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![]() You didn't mention the ignition in your list of mods. If you shaved the heads, then the compression is slightly higher, which means the gap should be less. With a stock coil, I'd start at .045", but that's just me.
![]() Take care, ~Chris
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Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local
RED & WHITE! |
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#8 | |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
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![]() Quote:
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84 gt350 89 lx vert 92 lincoln lsc. All Forced ( one way or another) |
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#9 |
Registered Member
Join Date: Sep 2002
Location: Boston
Posts: 592
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![]() So lets say that a person has a nice msd al6 and a big fat coil to match.... I've read all these claims that opening up the plug gap will make a bigger spark and get better milage and more power and so on. Should I? And if I do, by how much should I open it up?
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91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior |
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#10 |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
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![]() I have that setup and nitros oxide and i set my gap at .055. i might use .065 n/a but i'd test it befor i depend on it.
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84 gt350 89 lx vert 92 lincoln lsc. All Forced ( one way or another) |
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#11 | |
Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
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![]() Quote:
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Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local
RED & WHITE! |
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#12 |
Registered Member
Join Date: Sep 2002
Location: Boston
Posts: 592
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![]() the .65 works like a charm! I can feel a little difference in power but a lot of difference in idle and smoothness. Cool
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91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior |
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#13 |
Registered Member
Join Date: Mar 2002
Location: sherwood Forest
Posts: 291
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![]() did you put in new plugs when you opened up the gaps?
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84 gt350 89 lx vert 92 lincoln lsc. All Forced ( one way or another) |
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#14 |
Registered Member
Join Date: Sep 2002
Location: Boston
Posts: 592
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![]() Nope, actually, these were the same old bosch platinum plugs that have been riding along in the motor for 2 years. If anything, they looked a little whitish from being lean but nothing serious. It worries me that these plugs have a microscopic pin of an electrode. Makes me think that they'll get clogged by some debris but hasnt happened yet. Oh yeah and 1 plug doesnt match the rest. The set is a bunch of r3 131's and plug #5 is an r3 289. I broke one off and noone had these plugs anywhere except autozone and their computers reccomended the 289.
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91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior |
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