Cmb 90 head clearance
- Thread starter normlee
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Anders_Martinelle
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0.30mm + - 0.05mm.
60% is not really nessesary?
Anders
60% is not really nessesary?
Anders
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Wow 12 tho is tight on 60%, in 09 ran my CMB 90 GH at 18 tho on 50%. OMHO Even the pics in Aussie land are upside down.
Joke
David Ashcroft
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Looks like a new engine Norm ..
Is that a twin craft mono??
Cant really say correctly do you know the cc bowl volume?If you want use 60% then
Maybe start at 0.14" - 0.15"clearance at 11.75" pipe for the mono..Keep it rich.
Is that a twin craft mono??
Cant really say correctly do you know the cc bowl volume?If you want use 60% then
Maybe start at 0.14" - 0.15"clearance at 11.75" pipe for the mono..Keep it rich.
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Michael Costanzo
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hi norm,i had a purple head evo .90 and it's head cc is .89 and shimmed a .11. i ran it on 55%nitro 16% oil and it is a rocket!! do not let anyone tell you need MORE Clearance.it has to do with trapped CR,head CC and a bunch more! set it at .12 and be done with it. start out a little rich and check the plug!! nice caramel color and you are set..good luck.
normlee
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Thanks fellas, I need to get a syringe today and check the head volumes, I have a few different heads so may find the right size. What do you guys measure head volume in CC or Cui?
Thanks!
It is a twincraft 46", also have a new 30" I am hoping to finish soon. I like the old school monos over the Seaducer style that everyone has. If a Twincraft B mono ever came up would be awesome to complete the collection.
Thanks!
It is a twincraft 46", also have a new 30" I am hoping to finish soon. I like the old school monos over the Seaducer style that everyone has. If a Twincraft B mono ever came up would be awesome to complete the collection.
David Ashcroft
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The hulls look great..
1cc/1ml syringe.
1cc/1ml syringe.
Michael Costanzo
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i too like the old school mono's. i have a Sightler 44" with a .91 VAC & a Macs 13cc pipe.runs great and turns on a dime.i think there is still a picture on steve woods website..
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I think I have that same colour orange, It looks great on your twin craft!! I like the old style too, habe a Muck and a Microburst plus AC Lazer 45 that is going to be powered with an OPS 90.
Brad
Brad
Michael Costanzo
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norm, if your going to run high nitro,i would open it some otherwise compr will be quite a bit higher than i'd like. i ran .89 in my head. on my purple head evo.mike.
