No idea what spark plug to use

[Z.hb71]

So I need help, so I need to choose a plug for the 70cc and I have no idea which heat or whatever spark plug to use, is there a calculation? Keep in mind I'm running E85 so that changes things up a bit. I will answer any questions u need about my engine. It's not built but I hate having things up in the air, so I want everything ready for when I assemble it instead of messing around with stupid crap when the engine is built.
It's needs to be a resisstor plug
It needs to have a 19mm thread reach
Needs to have a 14mm thread diameter

 

[Seandonato73]

So what does alx use? You'll just be going up or down heat ranges from there.
And I'll say this too. Most engines don't nessisary need different heat ranges from gas to e85. But depending on your compression it may benefit to go a plug range or two colder to help prevent pinging.

 

[mark35]

So what does alx use? You'll just be going up or down heat ranges from there.
And I'll say this too. Most engines don't nessisary need different heat ranges from gas to e85. But depending on your compression it may benefit to go a plug range or two colder to help prevent pinging.

Alx use BMR7A

 

[Z.hb71]

So what does alx use? You'll just be going up or down heat ranges from there.
And I'll say this too. Most engines don't nessisary need different heat ranges from gas to e85. But depending on your compression it may benefit to go a plug range or two colder to help prevent pinging.

Oh ok, so I think I should go alittle colder due to higher compression.

Alx use BMR7A

Thx

 

[Seandonato73]

Wouldn't hurt... just a step or too.

 

[Z.hb71]

Wouldn't hurt... just a step or too.

Kay I'll buy a spark plug one step colder and another that's 2 steps colder to see which 1 runs better ?