question on 4mil banshee

[drbanshee]

I have a 4mil banshee, port and polished, pro design coolhead, v-3 reeds, 19cc domes, stock bore 64mm, compressions 125psi on both sides. I want to go up on compression. I am thinking to go with 17cc domes. My elevation is 6700. I was wondering if this would be a good idea so I can run 110 race fuel? Thankyou you guys for your time.

 

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[Drewski]

Do it!

[jbooker82]

Yea knock your self out. You want to shoot for around 185 psi of compression for straight 110 race fuel. Makes for a good boost in midrange. You will probaby have to swap domes back out if you ride at a lower elevation.

[drbanshee]

Yea knock your self out. You want to shoot for around 185 psi of compression for straight 110 race fuel. Makes for a good boost in midrange. You will probaby have to swap domes back out if you ride at a lower elevation.

 

 

Do I need to advance my timlmg I have +4, and what compression do I need to run 50/50 mix (91 and 110)? Thanks for your help I appreciate it.

[jbooker82]

Do I need to advance my timlmg I have +4, and what compression do I need to run 50/50 mix (91 and 110)? Thanks for your help I appreciate it.

 

No just leave it at +4 that is what was recomended to me by jeff at fast. I did have a drag ported cylinders by Patriot Racing they recomended +6 deg with race fuel.

 

 

It is hard to say what compression you need to run 50/50 mixed. Since you can get away with 150 psi on 91 and you run race fuel at 185 psi I would say half way in the middle so around 165.