Vac45 blue head VS Vac45 V-5

Intlwaters

Help Support Intlwaters:

FloridaScaleBoater

Well-Known Member
Joined
Oct 2, 2005
Messages
6,866
Are the parts interchangeable?
Is it just the piston & sleeve that are different or is the crank different also.
TIA
Rick
 

Bradley Maglinger

Well-Known Member
Joined
Sep 23, 2012
Messages
1,568
The newest style cranks only has room for one slug, after I got my new one slugged, I compared it vs the double slugged crank from Bouchie, the Bouchie crank still weighed a bit more but they are very close. In my 40 hydro I am currently running the new crank with it slugged from Kent Ballard and I have had zero failures, he does great work.
 

David Bryant

Well-Known Member
Joined
Sep 7, 2011
Messages
2,278
Curious, how does the CMB .45 V-5 compare to the current .45 RS EVO, and .45 M-Line engines? No comparison? Close in performance?
 

timwhalen

Well-Known Member
Joined
Oct 25, 2015
Messages
934
Curious, how does the CMB .45 V-5 compare to the current .45 RS EVO, and .45 M-Line engines? No comparison? Close in performance?

The V5 supposedly has more torque, due to the under square bore/stroke ratio. However, theory can be somewhat deceiving.
I have run all 3 of the combinations mentioned in the same D Hydro.
What we found is the RS EVO platform can swing more prop.
Could this be due to the higher rotating mass, hence greater inertia, with the RS EVO platform?... that's what we tend to think.
We did add 2 looper window ports to the V5 (stock timing) in an effort to get more fuel per cycle into the chamber, and it seems to have increased torque significantly.
But, we need to test more with the bigger 2200 and 2300 series ABC's to comment further. Strut depth also plays a significant role, too
 

Brian Schymik

Well-Known Member
Joined
Nov 24, 2002
Messages
740
I have run the v5, evo , and 45 blue head cmbs also in the same d hydro. The v5 and the blue head have very similar results- same props, sane speed, But the EVo is faster, throws the same props with no sag and launchs better. I think it is superior. Same results in my sport40
Brian
 
Top