plug question
 

Hey all
i have been trying to get everything finished so i can drop my power in this weekend but i have one more question. Afr reccomends autolite 3932 plugs and i cannot find them in the town i live in. most people look at me funny and jsut say they cant find where to get them. Is there another plug that would work in this cenario? is this the only one to use. AFR says start here...

Re: plug question
 

Re: plug question
 

It will cross . find something thats easy to get.

Re: plug question
 

OK I have heard, or read, that the "racing plugs" have a negligible effect on the overall Hp of a motor. could someone point me in the direction of a similar heat range to the 3932 in a standard plug?

Re: plug question
 

The cross ref from the website RLW provided for NGK is R5671A-10, which is way to cold for your motor. I run R5671A-9 in my 598 with Dart Pro 1's and solid roller, and they are still on the cold side. Ideally if you are less than 10:1 R5671A-8's would probably be the correct plug. Going on the colder side will keep it safer as far as detonation, but will likely foul plugs and not make as much HP. NGK's may be easier for you to find. I normally order these from summit racing.

Re: plug question
 

thanx
i found the ngk's and with any luck, buy sunday, the snow will stop and i can drop it in.

Re: plug question
 

Isint the 71 a non projected tip plug??


You can get the NGK from Napa and Orileys cheaper. The r series plug is there race plug and it is a shorter body . I use it in the race cars also.

Re: plug question
 

Strip,
Yes, the 71 is non-projected tip. If the projected tip is run you can get away with running a little colder plugs per the "-" designation. I personally like the non projected tip for durability purposes. The concept of the projected tip acting like a hotter plug because the tip is further into the combustion chamber and a colder plug because the incoming air charge cools the tip seems a little questionable to me. I know it is a big no-no to run projected tips on blown or NOS motors. There are a lot of guys running projected tip plugs successfully on NA motors. I have also heard projected tip plugs require a degree or two less timing due to the tip being further into the chamber. I am just sticking with what has worked well in the past for me.

Craig

Re: plug question
 

I have allways run the projected tips. On my steel headed motors I have ran the R5674-7-9's. On the race car on the nos you could tell when ya leaned on it :D

Rob