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sparkplugs for 440
Posted: Mon Sep 24, 12 6:52 pm
by RoelB
What would be a good plug to use on my RoadRunner
Stock motor with orginal Holley.
Thanks!!
Posted: Mon Sep 24, 12 7:12 pm
by AllKiller
I swear by the NGK BPR6S Or the Iridium XR5
But no doubt there will be some Champion fans RJ12YC
Posted: Mon Sep 24, 12 7:41 pm
by Les Szabo
yep NGK all the way
Posted: Mon Sep 24, 12 8:56 pm
by RoelB
fine by me, thanks!!
Posted: Mon Sep 24, 12 10:41 pm
by Steve
What makes one plug better than another plug gents??? I appreciate some run hotter than others etc but how do you know what is a good plug for your car? I use Autolite copper core 85s in my completely stock 383 4bbl but only because thats what I get when I ask for a set at the place where I get my service parts.....I dont have any probs with them but should I put more thought into it????
Cheers, Steve
Posted: Mon Sep 24, 12 11:03 pm
by Pete
Quiffy's right on the money there!!!
Posted: Tue Sep 25, 12 7:06 am
by Guy
Pete wrote:Quiffy's right on the money there!!!
Yep XR5's here
Posted: Tue Sep 25, 12 7:18 am
by GTXJim
So what would be the best NGK for an indy headed motor with 10.75:1 compression??
Posted: Tue Sep 25, 12 8:28 am
by Pete
I ran the NGK's in a 12.2:1 compresion motor with no issue.
Can't remember if I changed the heat range over the 6s though............
Posted: Tue Sep 25, 12 10:19 pm
by Bryan S
GTXJim wrote:So what would be the best NGK for an indy headed motor with 10.75:1 compression??
NGK 6s
Posted: Wed Sep 26, 12 10:28 am
by AllKiller
GTXJim wrote:So what would be the best NGK for an indy headed motor with 10.75:1 compression??
Jim
NGK R 5670-8 = 2nd coldest and probably will work the best with that compression, although the others will work well
NGK BP7 ES
NGK 7173.
Iron heads need a hotter range plug than an aluminum
Last number on NGKs is the heat range lower the number the hotter the range
Champions are other way round higher number is higher heat range
But that means how quickly they dissipate heat not how hot they run
NGK 7 street
8+ racing
NGK even do projected and Non projected tip for use with large amounts of Drugs
Posted: Wed Sep 26, 12 10:40 am
by AllKiller
Steve wrote:What makes one plug better than another plug gents??? I appreciate some run hotter than others etc but how do you know what is a good plug for your car? I use Autolite copper core 85s in my completely stock 383 4bbl but only because thats what I get when I ask for a set at the place where I get my service parts.....I dont have any probs with them but should I put more thought into it????
Cheers, Steve
Autolite is a good plug...if its working with no probs stick with em
I just prefer NGKs....you wot really notice any seat of the pants difference Steve
But you might from Champs to NGKs, i did
Posted: Wed Sep 26, 12 11:03 am
by TyreFryer
Good reference info Steve, I'll make this a sticky.
Posted: Wed Sep 26, 12 11:30 am
by AllKiller
Posted: Wed Sep 26, 12 11:51 am
by John
I`ve just found out I have champs
Time for a change I guess
