I had mine milled -.040 and didnt need to run race gas.

RoostKing...

 

I've posted this info on here before, but I'll do it again.

We checked the head temperatures of three different Banshees using an infrared heat gun. The temperatures were checked after several runs down the drag strip at Little Sahara, OK. The temperatures were taken on the top of the head, middle of the water jacket area.

1st Banshee checked was stock ported cylinders with T5 pipes and a new style Noss Machine head using 20cc domes. Head temperature was 148 degrees F.

2nd Banshee checked was a completely stock Banshee. Head temperature was 200 degrees F on one side, and 204 degrees F on the other side.

3rd Banshee check was with ported cylinders, FMF Fatty pipes, +4 timing advance, Cool Head w/18 cc domes (about 35 lbs more compression than the first Banshee). Head temperature was 158 degrees F.


Point of my post is this: These heads DO decrease the temperature of the coolant water in the combustion area. While 200'F is not too hot, I like mine to be a bit cooler.

Regards,

Rog

 

i wanna mill mine so i have to run race gas

 

If you do have your head milled, be sure and check the squish clearance when you re-install it. If only the face of the head is milled, your squish clearance can be too small causing the pistons to hit the head. Aftermarket head offer the advantage of correct squish clearance no matter what compression you choose. Also, there is no expensive head gasket or machine work when you wish to change your compression for different riding conditions.

 

David, good to see you post over here.

I just bought one of your heads. Looks great, have not installed it yet, but I am sure it will work perfectly.

I have a pro design on my other banshee and it works great also.

Anyway, glad to see you here.

Oh, do you make domes for the new 4mm stroker cranks running around?

Thanks

 

Thanks!

What would be the difference in the domes besides the compression ratio and the "end" compression being different?

 

What about using a thinner head gasket to reaise compression? If you air cooled, is it a realiable option? Also, how much hp can you have before you have to start worrying about twisting a crank?

 

David, I am not completley sure, some builders like Dan with patriot racing have said that you need to run domes that have the correct squish I think for the stroker crank.

I am no pro, so I may be way off the mark with this. Just going by what I was told. I think Dan machines his own, but am not sure on that.

Thanks
Bat

 

Bat, a lot of the stroker motors also use blaster pistons (66mm bore with different pin height). The blaster pistons only have a 9 degree angle on the squish vs banshees 12 degree angle. This angle is very important. This is why domes are different for these engines. From what I understand, the 12 degree is better. I know Wiseco custom makes some large bore/blaster pin height pistons. I don't know exactly who all is able to get these, but I know FTZ can.

Some of the common engines that run blaster pistons are the 370, 404 (420), 409, and I believe there is one around a 390.

 

alky, wiseco also makes a piston for this application. I dont want to over bore if I dont have to. I have some brand new cylinders, so I think I will have them setup for the stroker.

I believe some builders are cutting domes for coolheads just for this application.

I think the wiseco piston is a 795 series or something like that. I am not sure with that piston if you have to use the different domes, or standard domes.

I will figure it all out as soon as the time comes to put it all together. Cant wait.

Later
Bat