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View Full Version : what plugs are you running?


mustangkiller
12-05-2004, 11:07 AM
like the title says what plugs is everyone running? I need to order plugs for my car soon and I wanted to see what eveyone is running. also what gap does everyone have theres at I know on my TA i kept them around 30 I'm not sure if its the same on a mustang.

Thanks
Mike
dizntz
12-05-2004, 11:16 AM
well.. depending on the heads... (mine be edlebrock) autolight 3924's have been working well for me (N/A)... i have a full crane ignition (hi-6 and ps91 coil) along with a msd cap and rotor and taylor 904's... i gap them anywhere between .038" and .042".... i have used the 3923's but i didn't really need a plug that cold so i swapped back up to the '24's... blower applications... autolite RACING 3933's.... what the majority of the renegade guys spec out.... they come side gapped right from autolite... i know alderman can get them for you... tillman probably can too...

on a side note... been to tillman's lately??? i hear harry got himself a late model blown BENTLY!!! :shock:
mustangkiller
12-05-2004, 11:45 AM
I'm running edelbrock heads I ment to post that. so you think autolite RACING 3933's are my best bet then. I used to run NGK in my TA and I was really happy with them I'm just not sure if NGK makes a colder plug for a mustang.

that wouldn't surprise me about tillman lol he's always got some new toy sitting around.
dizntz
12-05-2004, 11:55 AM
ngk makes good plugs too... and a plug for almost everything if you are using their "racing" series... but the AR3933 is proven as far as i'm concearned... this of course is going almost purely on the opinions of the different renegade guys i'm in contact with during the season... but with the power they're making sans intercooler with a stock computer plus a host of other restrictions.. i know they have to milk every last 1/2hp from everything... if they like 'em... i like 'em...
mustangkiller
12-05-2004, 12:06 PM
Thank you I'll defintly look into those. Anyone else have any input on spark plugs?
blown1989saleen
12-05-2004, 12:16 PM
i run good ole Autolite 3923's that i side gap with my Dremel :wink: work real nice and they are cheap at $1.92 for a 2 pack at Wal Mart. now i would like to try the AR3923's but i cant find get them anywhere, all the local parts stores say they cant get them :?


Scott
mustangkiller
12-05-2004, 12:23 PM
the Ar3923 are one step colder then stock right. I was reading about the ar3933 and they sound alittle exetreme for a street car lol everyone on corral that has them runs them in race cars.
blown1989saleen
12-05-2004, 12:28 PM
the Ar3923 are one step colder then stock right. I was reading about the ar3933 and they sound alittle exetreme for a street car lol everyone on corral that has them runs them in race cars.their #'s are kinda confusing to me, but the stock plug would be a 25 so the AR3923 would be 2 ranges colder. do you know where i can get these? i can order them from sparkplugs.com but i aint paying over $3 ea. that they want for them :roll:
mustangkiller
12-05-2004, 12:33 PM
if I go to tillmans this week i'll see if he carries them or I'll see if Ray from Autowerx can order some.
dizntz
12-05-2004, 01:03 PM
scott, you talking aboput standard autolite 3923's??? i might have a set in my tool box with virtually 0 miles on them... ok.. maybe 200-300 miles... i walked into pep boys on concord pike and told them to give me two boxes and they had all but 1 plug in stock... if that's all you want, get ahold of 351c stang on dsr aka carlos... he works there, so he should be able to hook you up...
blown1989saleen
12-05-2004, 01:08 PM
scott, you talking aboput standard autolite 3923's??? i might have a set in my tool box with virtually 0 miles on them... ok.. maybe 200-300 miles... i walked into pep boys on concord pike and told them to give me two boxes and they had all but 1 plug in stock... if that's all you want, get ahold of 351c stang on dsr aka carlos... he works there, so he should be able to hook you up...nah, the Autolite AR3923's, they are the "race" version with cut back electrodes and a few other "special features" are the ones i have a hard time coming across, i get the regular 3923's at Wal Mart. Thanks though man.

mustangkiller if you find a place to get the AR plugs let me know and ill go there and pick some up :wink:
RdRunnr
12-05-2004, 01:12 PM
I run regular autolite 3923's too gapped at .30. I get them at Walmart too for $1.92 a two pack.
RdRunnr
12-05-2004, 01:24 PM
Scott,

Check out http://www.sparkplugs.com/ ...you can get whatever you want there.
mustangkiller
12-05-2004, 05:18 PM
I love it, how can you beat $1.92 for two.

Scott i'll see if I can find some this week. I'm almost positive tilman can get them I've bought autolites off him before. but I'm going to try autowerx because I know the owner so they'll be cheaper there.

I guess I'm going to try to go with the AR3923's if I can find them and if not I'll try the 3923's.

Thanks
Mike
modo
02-14-2005, 09:34 AM
AR3923

8)
RdRunnr
02-14-2005, 09:42 AM
The guys that I know that run AR's all run AR3910's...what's the difference between the AR3910's and AR3923's? Who sells AR's around here? I know sparkplugs.com sells them pretty reasonably.
modo
02-14-2005, 09:44 AM
The guys that I know that run AR's all run AR3910's...what's the difference between the AR3910's and AR3923's? Who sells AR's around here? I know sparkplugs.com sells them pretty reasonably.

never saw anyone use a 3910 :?:
Juiced91GT
02-14-2005, 08:18 PM
stock heads-autolite 23's gapped at .035"
blown1989saleen
02-14-2005, 08:33 PM
The guys that I know that run AR's all run AR3910's...what's the difference between the AR3910's and AR3923's? Who sells AR's around here? I know sparkplugs.com sells them pretty reasonably.

never saw anyone use a 3910 :?:modo, not sure what the equivalant heat range is, but a AR3910 does not equal regualar 3910 you might be able to find more info over on sparkplugs.com that Eric mentioned. Eric i dont know of anyplace in our area that sells the AR plugs, i couldnt find ANYWHERE to get em for me, not even speed shops i ended up ordering my AR3923's from sparkplugs.com
Quick88Tbird
02-15-2005, 10:02 AM
With stock heads and a nearly stock combo, I switched from autolite 25's to AR133's and it was like night and day...I can't say enough good about these Autolite Racing plugs. I was able to get mine through Advance Auto Parts....cost me like $21 shipped for a set of 8. When I went in and asked for them 3 guys told me no, then some Honda driving kid told me to hold on...he rattled away on the keyboard and said he could have them next day. Most of the people at the parts stores just don't know or are too lazy...I know this because I work at AutoZone...I don't think we can get them though...I'll check this afternoon when I go in.

Anybody know what Autolite Racing plugs will fit GT-40P heads...I know that they use the same plug style as a '93 Mark VIII-dual cam 4.6...not sure on the heat ranges though.
Quick88Tbird
02-17-2005, 09:33 PM
Well, I can't get the plugs through my work, but like I said, Advance can get them.
AllMtr9SecStang
02-18-2005, 03:09 PM
AR3933'S or NGK #8's
2MUCHBOOST
02-18-2005, 03:46 PM
AR23 gapped at 32 stock heads :roll:
rotax
04-03-2006, 03:17 PM
NGK 9
Mill Creek Mafia
04-03-2006, 11:10 PM
i've been running the 3923's on my stock heads right now, and even though my car has been running out of wack for a little while, those plugs look damn good. I'm impressed. I've also bought 2 sets of AR3923's from Advance Auto Parts. I believe they had to order them though... I got them a while back.