CMB 91 VAC

[Terry Keeley]

Had a look at CMB's new 91, should be stout.

https://www.intlwaters.com/gallery/albums/userpics/10068/2012_CMB_VAC_91.xls

 

[kcvnd]

What changes have been made Terry?

 

[Ian Inverarity]

Just cruising around the lake, first time in the water, running rich to break them in, 91 VAC twin:

http://www.youtube.com/watch?v=AcPhhDPxJlI&feature=related

That was on 25% nitro too.

 

[Terry Keeley]

Just cruising around the lake, first time in the water, running rich to break them in, 91 VAC twin:

http://www.youtube.com/watch?v=AcPhhDPxJlI&feature=related

That was on 25% nitro too.

Sweet, looks like I'm gonna like it!

What happened, hit something?

 

[Terry Keeley]

What changes have been made Terry?

Not sure, never had one B4...

 

[steve wood]

blow down is only 26°.same as 2 i just finished.don't try to lower liner,it won't work

 

[Luca Gray]

Hi Steve

can i ask why it wont work?

cheers Luca

 

[Ian Inverarity]

Sweet, looks like I'm gonna like it!

What happened, hit something?

Broken boom tube.

 

[Tim Kish]

Had a look at CMB's new 91, should be stout.

http://gallery.intlw..._CMB_VAC_91.xls

Can't wait to see it on the water this season B)

Tim K

 

[dwilfong]

Hi Steve

can i ask why it wont work?

cheers Luca

Sub piston port induction.

 

[shoboat]

I think it needs one of those Fancy Head Buttons also.

 

[LarryConrad]

I have to wait till the ice and snow is gone to start breaking mine in.

 

[steve wood]

Hi Steve

can i ask why it wont work?

cheers Luca

sub piston induction.the exhaust port is so low ,you cant drop the liner any at all

 

[Andy Brown]

What's wrong with sub piston induction?

 

[Tom Foley]

What's wrong with sub piston induction?

Nothing apparently as the Mac 84's I had hauled ass and now these VAC's are hauling ass also..I love them !

http://s1255.photobucket.com/albums/hh637/fichrman2/?action=view&current=P1010038.mp4

 

[ALLAN YUEN]

Just cruising around the lake, first time in the water, running rich to break them in, 91 VAC twin:

http://www.youtube.com/watch?v=AcPhhDPxJlI&feature=related

That was on 25% nitro too.

Aarron I looked at right sponsons off ( broken) then stop so seem not strong for boom main?

 

[Terry Keeley]

blow down is only 26°.same as 2 i just finished.don't try to lower liner,it won't work

Gonna run it as it comes to start but I thought those transfers were high.

Maybe bump the exhaust to 196? :blink:

You get about the same head volume? ie: 0.83 with a 0.1cc dish?

 

[dwilfong]

What's wrong with sub piston induction?

Have always bin told that it robs low end power.

Never tried to run one with it so can only go with what I have bin told.

So come on spreed some wisdom for us. Whats the scoop.

David

 

[Andy Brown]

What's wrong with sub piston induction?

Have always bin told that it robs low end power.

Never tried to run one with it so can only go with what I have bin told.

So come on spreed some wisdom for us. Whats the scoop.

David

It's probably also been said that raising exhausting timing or making the pipe shorter robs low end power too. And rightfully so, because it does....but we still raise and shorten!

 

[steve wood]

blow down is only 26°.same as 2 i just finished.don't try to lower liner,it won't work

Gonna run it as it comes to start but I thought those transfers were high.

Maybe bump the exhaust to 196? :blink:

You get about the same head volume? ie: 0.83 with a 0.1cc dish?

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