Hello everyone,
I need to replace my spark plugs, and I was wondering which ones you recommend to use with running a Haltech and direct fire ignition? Is anyone using RX8 plugs? My engine is stock (13B) and mods are Haltech Sprint, AEM-1A coils, running only the stock two injectors (but bigger) with the S5 intake, racing exhaust, no emissions. I was thinkin of going with the recommended stock plugs for the RX-8 (NGK 6700 & 6701) but wasn't sure if that's the best choice.
Please advise.
Thanks!

Note: I posted this in the Haltech forum, but didn't get any responses

 

i do like the Rx8 leading plugs. the Trailing plugs are longer, though and so i don't use them, although other people have
stock FC or FD plugs work too

 

Ok thanks! So the leading Rx8 plug is the same length as stock and won't cause issues?

 

yep!

 

I have temporarily used RX-8 spark plugs in the 13B in my 85 with zero issues. I hadn't considered the length of the trailing plug and I will have to compare it to some original BR8EQ-14 spark plugs as well as some BR7EQ and some BR9EQ spark plugs. Thank you for the information.

 

I'd be curious to know how much longer it is. I ended up going with the NGK double platinum 4764's for leading and the 5255's for trailing. Now I have to get another tune, b/c it seems like it needs more fuel.