E85 Spark Plugs - Mitsubishi Evolution Forums: Mitsubishi Lancer Forum

SuPeRNeT · 02-18-2008, 08:01 PM

What kind of plugs are every one using for E85 and what gap? I'm using bpr8es's at .020, thinking about going 1 step colder so hopefully I can run little wider gap.

KenMasters · 02-18-2008, 08:22 PM

Someone finally asked! I have been wondering this myself. I am still running the bpr7eix, but was thinking of the 8es or a 8eix. If you find a good combo let us know.

brp · 02-18-2008, 08:25 PM

i am running the same ones that came stock on the car, well i replaced them about 1000miles ago but went with the same. also the VIII and IX are different anyways...

DynoDude · 02-18-2008, 08:47 PM

Whoa! BPR8ES are about the coldest plug you should run in a VIII. Any colder and you will have misfire's!

tobz · 02-18-2008, 09:20 PM

Thats why I was wondering if a 6 was available?

Warrtalon · 02-18-2008, 09:27 PM

6 is way hotter and is used on DSMs. I don't think you'd ever want to use a 6 series. On DSMs, we upgrade to 7s. On Evos, we upgrade to 8s and sometimes 9s in extreme situations.

SuPeRNeT · 02-19-2008, 10:47 AM

I had mplspilot from evom tell me he's running br8es plugs which are a half step colder then the bpr8es, he's running them at .022 on e85. Now wouldn't running a heavily modified car on an 85% alcohol fuel require a really cold plug?? I get misfires at peak tq. from running my gap at .022 on the bpre8's with a Buschur COP.

SuPeRNeT · 02-19-2008, 10:50 AM

Maybe a cold iridium would fix the issue?

uterus · 02-19-2008, 03:14 PM

I was under the impression that since e85 burns cooler you don't need to run a colder plug on a stock sized turbo. Maybe that's only for the IX?

tobz · 02-19-2008, 03:22 PM

Thats why I was wondering if the 6 would be better for winter use.

KenMasters · 02-19-2008, 05:29 PM

Ethanol does burn cooler, but what this has to do with the ignition is beyond my understanding. With all the timing advance in my tune I believe the colder plug is still the ideal piece of hardware to go with.

I know the cooler plug is a good choice for an agressive gasoline tune.
If indeed a hotter plug than the BP or BR "8" is a better choice for an e85 tune I don't see anything wrong with running the OE or equivilent plug.

Let's keep pecking at this one boys!!!

Warrtalon · 02-20-2008, 10:18 AM

Supernet, Iridium isn't better for high boost - only for longevity at normal boost levels. Copper is better for high boost, but they obviously don't last as long, which is fine since they are so cheap. I keep 10ct boxes spare all the time...

WANTED · 02-20-2008, 11:32 AM

Quote:

Originally Posted by SuPeRNeT

I had mplspilot from evom tell me he's running br8es plugs which are a half step colder then the bpr8es, he's running them at .022 on e85. Now wouldn't running a heavily modified car on an 85% alcohol fuel require a really cold plug?? I get misfires at peak tq. from running my gap at .022 on the bpre8's with a Buschur COP.

The difference between the bpr8es and the br8es is the protruding (thus the p) and the non-protruding tip on the spark plug. How does this make the br8es a half step colder??

SuPeRNeT · 02-20-2008, 12:09 PM

Quote:

Originally Posted by WANTED

The difference between the bpr8es and the br8es is the protruding (thus the p) and the non-protruding tip on the spark plug. How does this make the br8es a half step colder??

Thats just what dude said from evom..

I think less surface area of the plug means it's colder?

Warrtalon · 02-20-2008, 01:11 PM

Quote:

Originally Posted by WANTED

The difference between the bpr8es and the br8es is the protruding (thus the p) and the non-protruding tip on the spark plug. How does this make the br8es a half step colder??

That's pretty much how they're referred to. The Ps act as a half-step instead of a full step.