best spark plugs and gap
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DailyDrifter
The Slow and the Curious
- Joined
- Dec 5, 2007
- Messages
- 5,118
This topic has been beaten to death IMO, but the concensous is NGK UR5's gapped around .32.
Thanks
and I would look for right Autolite plug for your build and stay with this brand ONLY no matter what build /boost you have /run , that's my opinion
blackmonte
New HP Technology !!!
- Joined
- Jan 9, 2007
- Messages
- 2,135
E3s no gap
+1 i have been running this setup for several years now
Also, CR43TS AC Delco, Autolite #24's, if your running more than 20 lbs, boost may wanna go a heat range colder.
You should experiment. A lot of solid advice here though. The 1st reply i gave has been what ive done in all cars ive worked that ran over 20 psi in the last 12 years. For under 20 psi CR43TS is fine gapped at .035.
nope , NOT iridium plugs guys , $18 a pop of waste money ,Bison's firts suggestion is fine , my suggestion to stay only with Autolites is based on problems with almost any brand BUT Autolite plugs , well .... at one point at dyno shop tunning my car next guy in line was an import/Mustang GURU , you know that imports will run some crazu boost # , I was blowing spark off at that dyno run with Iridium plugs gapped at 30 ,so I suggested NGK swap that I had in mycar but never got installed yet and the HIGH BOOST GURU said NOPE ...... let's get you Autolites and gap them at 25 ,well to make the story short ...GM igniton module /coils and Autolite plugs have been the BEST for me ever since ,again that's just my opinion
........you might be ok with others making less power but..... Autolites worked best for me all the way period....and yes ...iriduim plugs were just an experiment 
nope , NOT iridium plugs guys , $18 a pop of waste money ,Bison's firts suggestion is fine , my suggestion to stay only with Autolites is based on problems with almost any brand BUT Autolite plugs , well .... at one point at dyno shop tunning my car next guy in line was an import/Mustang GURU , you know that imports will run some crazu boost # , I was blowing spark off at that dyno run with Iridium plugs gapped at 30 ,so I suggested NGK swap that I had in mycar but never got installed yet and the HIGH BOOST GURU said NOPE ...... let's get you Autolites and gap them at 25 ,well to make the story short ...GM igniton module /coils and Autolite plugs have been the BEST for me ever since ,again that's just my opinion
I agree. Ive run autolite 23's a few times and they worked as well as the CR42TS AC part number. Same gaps
NGK's
i don't see a lot of people running these but i have had good luck with them on my iron heads. the stock is #2623 plug#BPR6FS . it's a regular resistor type plug. i gapped them at .32 i buy them at Napa for around $2.50 a plug..............Bob
i don't see a lot of people running these but i have had good luck with them on my iron heads. the stock is #2623 plug#BPR6FS . it's a regular resistor type plug. i gapped them at .32 i buy them at Napa for around $2.50 a plug..............Bob
Turbo6Smackdown
Well-Known Member
- Joined
- Dec 31, 2005
- Messages
- 6,110
.Gotta update this stuff a bit...
ONLY? You sure about that? Re-research Autolite, and tell me what you come up with. The Autolite of today, is NOT the same Autolite you grew up with... They've made a few changes.
Orginally posted by Roger:
"I know platnium won't work in our cars (they run too hot)_."
Are you saying that the heat range is specified by the materials used?
I bet you it's not.
Yea... Good old AC Delco. I loved them too. NOT the same AC Delco we all grew up with. Buy parts from them with care. A LOT of their parts went in the ****ter as of late. Examine them on an individual basis.
18 bucks per plugs? That's simply not true. And they last a LOT longer than the typical .99 cent AC Delcos let me tell you. There isn't even a competition.
and I would look for right Autolite plug for your build and stay with this brand ONLY no matter what build /boost you have /run , that's my opinion
ONLY? You sure about that? Re-research Autolite, and tell me what you come up with. The Autolite of today, is NOT the same Autolite you grew up with... They've made a few changes.
Orginally posted by Roger:
"I know platnium won't work in our cars (they run too hot)_."
Are you saying that the heat range is specified by the materials used?
I bet you it's not.
Thanks for the imput. I think I'll go with the CR42's. I like AC Delco parts as much as possible!!
Yea... Good old AC Delco. I loved them too. NOT the same AC Delco we all grew up with. Buy parts from them with care. A LOT of their parts went in the ****ter as of late. Examine them on an individual basis.
nope , NOT iridium plugs guys , $18 a pop of waste money ,Bison's firts suggestion is fine , my suggestion to stay only with Autolites is based on problems with almost any brand BUT Autolite plugs , well .... at one point at dyno shop tunning my car next guy in line was an import/Mustang GURU , you know that imports will run some crazu boost # , I was blowing spark off at that dyno run with Iridium plugs gapped at 30 ,so I suggested NGK swap that I had in mycar but never got installed yet and the HIGH BOOST GURU said NOPE ...... let's get you Autolites and gap them at 25 ,well to make the story short ...GM igniton module /coils and Autolite plugs have been the BEST for me ever since ,again that's just my opinion
18 bucks per plugs? That's simply not true. And they last a LOT longer than the typical .99 cent AC Delcos let me tell you. There isn't even a competition.
Yeah, in fact I'd like to see an updated version of the spring cleaning from gnttype that goes into everything from plugs, to filters, to oil types, etc. while incorporating some of the newer technology that some of the vendors have available.
