[FMile Pontiacs]

I am working on bolting up a set of KRE Highports on my 463. I have never ran KRE Heads before so I was wondering what Spark Plug Recommendations you all would have. It will be a 14 to 1 compression engine and will run on probably 112 octane. Thanks for your help.

[gman005]

I use NGK 8 in my heads with 13.8 to 1 with VP113.

[stroker461]

NGK V-Power..... Cold= R5671A-11.... Medium=R5671A-8.... Hot=FR4....thats the 3 NGK plugs that Kauffman recommends for the high ports, it also has alot to do with what ignition combination your running as well as compression type of fuel ect. ect. Were running the NGK R5671A-8 plugs in my 850+hp 461ci with high ports with 13.5:1 compression on 112 and ignition is a MSD power grid, pro billet distributor, crank trigger and MSD HVC-2 coil and everything seems to be great, plugs are burning nicely, idk but I've always been told with a hotter ignition go with a colder plug and I figured id try the middle of the road to start with and its done well.... best of luck, your gunna love the high ports there sweet heads...

[WARPed]

another common plug used are Autolite 3924

[LiL Jack]

I heard Splitfire plugs are worth 5 HP




J/k

[stroker461]

Originally Posted by LiL Jack

I heard Splitfire plugs are worth 5 HP




J/k

LMAO thats like my damn old 5hp Briggs lawn mower made 6hp when I switched plug from Autolite to a Champion lol

[Jack Ferris]

Originally Posted by LiL Jack

I heard Splitfire plugs are worth 5 HP




J/k

5hp each?

[punisher#1]

NGK 5671-8 All motor
5671-10 or -11 if your sprayin'

[FMile Pontiacs]

Originally Posted by gman005

I use NGK 8 in my heads with 13.8 to 1 with VP113.

Thanks

[FMile Pontiacs]

Originally Posted by stroker461

NGK V-Power..... Cold= R5671A-11.... Medium=R5671A-8.... Hot=FR4....thats the 3 NGK plugs that Kauffman recommends for the high ports, it also has alot to do with what ignition combination your running as well as compression type of fuel ect. ect. Were running the NGK R5671A-8 plugs in my 850+hp 461ci with high ports with 13.5:1 compression on 112 and ignition is a MSD power grid, pro billet distributor, crank trigger and MSD HVC-2 coil and everything seems to be great, plugs are burning nicely, idk but I've always been told with a hotter ignition go with a colder plug and I figured id try the middle of the road to start with and its done well.... best of luck, your gunna love the high ports there sweet heads...

Thanks for all the info. I have been following your engine build and have a very similar 461 build planned that these 350 HPs will go on this winter. I am running a 6al box with a Pro Billet Distributor. I had thought about one of the digital 7 boxes so the RPM Switch and 2/3-Step would be all inclusive.

[FMile Pontiacs]

Originally Posted by LiL Jack

I heard Splitfire plugs are worth 5 HP




J/k

LOL! That is funny!

[FMile Pontiacs]

Originally Posted by punisher#1

NGK 5671-8 All motor
5671-10 or -11 if your sprayin'

Sounds like the -8 may be the way to go for me since it is N/A.

[FMile Pontiacs]

Thanks to all for all the advice so far.