I'm about to install a cop kit on my evo 9. I know with this kit you don't have to gap the plug down as far. What's the recommendation on gap with the spoolin up kit?

 

Have you tried searching the site?

https://www.google.com/#hl=en&tbo=d&...w=1680&bih=937

 

.025 thats what i'm running. All NGK bprXes/brXes plugs come pregapped at .025 so its kinda awesome. Of course I double check. Thinking about opening them up to .028 when i install my iridiums

 

Nice I appreciate u helping me out that's good to know. May pull my iriniums and open them up to .28 and see its gonna feel like I expect

 

I updated your thread title, you're welcome.

 

Thanks

 

Evo IX uses Iridium plugs, and I've always heard you shouldn't gap Iridium plugs. On my VIII, I run coppers, and stayed around 27 to 28 with no issues. I've never had spark issues however, on stock coils, or my SpoolinUp kit.

 

Have a spoolin cop on my 9 and run Denso ikh24 gapped to .028 with a feeler gauge. Runs great, so good I'm thinking out taking it out to .030.

 

That's great!!!

 

On the spoolinup kit you will technically be able to run more gap. However, there's no evidence to suggest that running more gap will translate to any benefit in power or drive-ability, etc. Theoretically, a larger gap provides greater spark surface area available for combustion, but as far as I know, no evidence exists to back power gains. Depending on what type of plugs you use, increasing gap can accelerate fouling of plugs. When I switched from stock ignition to spoolinup (new coil kit), I got gap happy and figured a larger gap may help. I gapped my ngk coppers (br8es) at .028. Car ran fine but plugs fouled in 1k and I ended up with some knock. Bought new plugs, gapped at around .023 and haven't had any issues since.

You can get a little more aggressive with the gap with the spoolinup but don't expect a huge difference. Get it to a gap that allows ur car to run well. I'd stick to the accepted range .02 - .025 or so.

 

Thanks yog. I spoke to my tuner he said same thing about .22.

 

Anyone know if you have to retune after you install one of these?

I don't know if it alters the A/F at all.

 

No you won't. I literally got tuned a day or two before installing mine. I installed it. Just runs smoother after install.