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post #141 of 161 Old 10-04-2010, 10:46 PM
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Quote:
Originally Posted by mod mach View Post
Has anyone ever used the E3 plugs on a nitrous setup? They have the same design as the zex so im thinking of running them.
Anyone?


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post #142 of 161 Old 06-15-2013, 01:19 PM
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NGK-TR6 for GT40 Y302 125 shot. That the correct plug or should i go NGK-TR5?



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post #143 of 161 Old 10-23-2013, 10:03 PM
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I am installing a 125 shot NOS kit and need to know exactly what plugs to use before I spray it. Stock '69 or '70 351w heads. Any help will be greatly appreciated!!!! Also, how much do I retard the timing?
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post #144 of 161 Old 02-08-2014, 01:33 AM
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Quote:
Originally Posted by mikey9495 View Post
GT40 Heads:

NGK
stock--(TR4) 3754 (Heat Range - 4) [14mm, .708 Reach, 5/8" Hex]
1 step colder--(TR55) 3951 (5) [14mm, .708 Reach, 5/8" Hex]
2 step colder--(TR6) 4177 (6) [14mm, .708 Reach, 5/8" Hex]
-----(B8EFS) 1049 (8) [*recessed tip, racing plug]
-----(B9EFS) 1085 (9) [*recessed tip, racing plug]
Did a little homework on this for Iridium NGKs (Denso)
Stock 3754 Iridium IT16
1 colder 3951 Iridium IT20
2 colder 4177 Iridium IT20 yes same number
3 colder 1049 Iridium IT24 this is a race plug
Didn't find one for the 1085

This is the power plug number they make a tough also to get that part number change the I out for a V so IT16 would be VT16. Difference look below. They didn't make a tough for the 1049 plug.

DENSO SPARK PLUGS - Basic Knowledge

I have the Iridium in the car now not sure if they are the IT16 or IT20 will look and see when I get home.

Plan on putting a 125 shot (wet kit) on my 93 cobra do you think it will be ok with the IT20 or would you just go with the 3951s will back the timing off 3 deg.

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post #145 of 161 Old 05-14-2014, 11:50 AM
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Quote:
Originally Posted by mikey9495 View Post

TFS, Edelbrock, and AFR Heads:
[14mm, 3/4" Reach, 5/8" Hex, gasket seat]
AUTOLITE
1 step colder--3924 (4) [*recommended starting point]
2 step colder--3923 (3)
-----AR3933 (3) [*recessed tip, racing plug]
-----AR3932 (2) [*recessed tip, racing plug]
-----AR3931 (1) [*recessed tip, racing plug]

[/i]
This information looks to be incorrect according to my internet search results and the Autolite heat range chart. The 3924 is the hottest plug of this size on the Autolite chart and according to searches found on several other forums that this is a NA plug only. One step colder is the 3923. Autolite's chart goes as follows:

Hottest---AR3924 (Resistor plug)
----------AR3923 (Resistor plug)
----------AR3935 (Non-resistor plug)
----------AR3934 (Non-resistor plug)
----------AR3933 (Non-resistor plug)
----------AR3932 (Non-resistor plug)
Coldest---AR3931 (Non-resistor plug)
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post #146 of 161 Old 05-14-2014, 12:45 PM
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Quote:
Originally Posted by Str8ballar View Post
Did a little homework on this for Iridium NGKs (Denso)
Stock 3754 Iridium IT16
1 colder 3951 Iridium IT20
2 colder 4177 Iridium IT20 yes same number
3 colder 1049 Iridium IT24 this is a race plug
Didn't find one for the 1085

This is the power plug number they make a tough also to get that part number change the I out for a V so IT16 would be VT16. Difference look below. They didn't make a tough for the 1049 plug.

DENSO SPARK PLUGS - Basic Knowledge

I have the Iridium in the car now not sure if they are the IT16 or IT20 will look and see when I get home.

Plan on putting a 125 shot (wet kit) on my 93 cobra do you think it will be ok with the IT20 or would you just go with the 3951s will back the timing off 3 deg.
id start by chucking those iridium junks in the trash... if they worked better then a standard v power plug racers would use them.

and we dont use them lol

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post #147 of 161 Old 06-05-2014, 09:45 PM
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Hey guy I just got done building a 347 stroker with afr 185 aluminum head's compression is 10.80. Im run a 100 or 150 wet shot. I alst have msd digital 6 box. So what plug should I use thanks
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post #148 of 161 Old 06-05-2014, 10:15 PM
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Quote:
Originally Posted by 1 bad stang View Post
Hey guy I just got done building a 347 stroker with afr 185 aluminum head's compression is 10.80. Im run a 100 or 150 wet shot. I alst have msd digital 6 box. So what plug should I use thanks
i wouldnt go too cold maybe a step, but i would definately use a recessed tip.

replaced the 93'ish coupe with a 76 F100, 393, 11.5:1, TEA CNC 205 TW's, custom Hyd Roller, Super Vic, 830 HP, AOD, Edge custom conv., Silverfox SPT-MAC-TB.
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post #149 of 161 Old 06-05-2014, 10:47 PM
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Ok then what plug u recommend
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post #150 of 161 Old 06-06-2014, 07:00 AM
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i prefer NGK-R's in all my poweradder applications, so i would suggest the NGK R5671A-7


replaced the 93'ish coupe with a 76 F100, 393, 11.5:1, TEA CNC 205 TW's, custom Hyd Roller, Super Vic, 830 HP, AOD, Edge custom conv., Silverfox SPT-MAC-TB.
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post #151 of 161 Old 06-06-2014, 11:04 AM
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Quote:
Originally Posted by 1 bad stang View Post
Hey guy I just got done building a 347 stroker with afr 185 aluminum head's compression is 10.80. Im run a 100 or 150 wet shot. I alst have msd digital 6 box. So what plug should I use thanks
Quote:
Originally Posted by boostdcoupe View Post
i prefer NGK-R's in all my poweradder applications, so i would suggest the NGK R5671A-7
correct me if I'm wrong but isn't the R5671A-7 the hottest plug?

1 step colder would be the R5671A-8?

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post #152 of 161 Old 06-06-2014, 09:18 PM
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Originally Posted by knlx91 View Post
correct me if I'm wrong but isn't the R5671A-7 the hottest plug?

1 step colder would be the R5671A-8?
not sure, thats what Bob K told me to run on my TFS headed 347 with a little boost, i thought the 7 was the warmest of the recessed tips... might be wrong though.

replaced the 93'ish coupe with a 76 F100, 393, 11.5:1, TEA CNC 205 TW's, custom Hyd Roller, Super Vic, 830 HP, AOD, Edge custom conv., Silverfox SPT-MAC-TB.
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post #153 of 161 Old 06-07-2014, 01:45 AM
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NGK plugs------Low #s=Hotter------High #s=Colder.
Autolite plugs---High #s=Hotter------Low #s=Colder.


Just noting-a Autolite 3924 plug crosses to a 5 or 6 in a NGK depending on whos chart you use.
Alot of the heavy hitters use a 10







.
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post #154 of 161 Old 06-11-2014, 07:17 AM
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Originally Posted by boostdcoupe View Post
not sure, thats what Bob K told me to run on my TFS headed 347 with a little boost, i thought the 7 was the warmest of the recessed tips... might be wrong though.
correct 7 is the warmest

I was using the R5671A-8 on a low boost 302 TFS TW & the R5671A-9 on 12 psi

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post #155 of 161 Old 06-11-2014, 09:09 AM
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Originally Posted by knlx91 View Post
correct 7 is the warmest

I was using the R5671A-8 on a low boost 302 TFS TW & the R5671A-9 on 12 psi
well thats what i thought but i wasnt sure, then fordjunky got me doubting myself more...

replaced the 93'ish coupe with a 76 F100, 393, 11.5:1, TEA CNC 205 TW's, custom Hyd Roller, Super Vic, 830 HP, AOD, Edge custom conv., Silverfox SPT-MAC-TB.
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post #156 of 161 Old 09-03-2014, 11:14 AM
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Did a little homework on this for Iridium NGKs (Denso)
Stock 3754 Iridium IT16
1 colder 3951 Iridium IT20
2 colder 4177 Iridium IT20 yes same number
3 colder 1049 Iridium IT24 this is a race plug
Didn't find one for the 1085

This is the power plug number they make a tough also to get that part number change the I out for a V so IT16 would be VT16. Difference look below. They didn't make a tough for the 1049 plug.

DENSO SPARK PLUGS - Basic Knowledge

I have the Iridium in the car now not sure if they are the IT16 or IT20 will look and see when I get home.

Plan on putting a 125 shot (wet kit) on my 93 cobra do you think it will be ok with the IT20 or would you just go with the 3951s will back the timing off 3 deg.

Little update
Changed out the 1 colder 3951 Iridium IT20 with a NGK 3177 recessed plug it has a heat range of 6. Would like to add that on this page they are saying the stock heat range of a GT40 head is 4 NGK said it was 5 for their plug. So I went one colder and went with a 6. I know plugs don't make HP but I made much better numbers on these plug with just a little tuning on my kit. NGK also said the max gap was .36 I gapped at .35 on a 125 shot.

93 cobra Dart 363 11r205 heads T-56 Magnum 2.66 cobra intake 3in shorties 3in out the back
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post #157 of 161 Old 04-06-2015, 09:10 PM
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What plug is everyone using with the new tfs 11r heads? Specifically with nitrous. Thanks

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1995 Mustang- 25.5, mini tub, 315
2012 Canyon- 4/4.5" drop, 18" Titan wheels
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post #158 of 161 Old 04-09-2015, 03:54 PM
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Autolite AR3934 .035 gap for 125hp?

1988 Mustang coupe- 302, c4, carb
1995 Mustang- 25.5, mini tub, 315
2012 Canyon- 4/4.5" drop, 18" Titan wheels
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post #159 of 161 Old 04-28-2015, 09:18 AM
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Well I tried the Autolite 3924's on a 125 shot and everything looked good. Now going to pill it up to .073 jet and keep timing at 10deg retard, from 36deg. 110 fuel. Anyone want to suggest a plug? 56cc 11r stock shortblock.

1988 Mustang coupe- 302, c4, carb
1995 Mustang- 25.5, mini tub, 315
2012 Canyon- 4/4.5" drop, 18" Titan wheels
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post #160 of 161 Old 08-08-2015, 08:38 PM
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Guess everyone went turbo?

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post #161 of 161 Old 08-24-2015, 06:45 PM
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I've been told to use AR3923 on 125 to 200 shot.
Or NGK R5671a-9
I'll be trying those 3923 out on a 150 shot in about a week or so.
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