New Style Russian motor

[Guest_Norm Doerr]

I wonder how hard it would be to put an OS carb on that thing. Sure looks like an OS valve house. LOL

 

[Anders_Martinelle]

Norm, it`s made the same way (CNC) but it`s made for the STD Kalistratov 90 carb.

Inside it`s NOT like a OS valve house, it`s totaly different .

Anders

 

[[email protected]]

This is why I love the post boards!

 

[Scott Schneider]

Whoa! that is something new. And damm I hate those dump carbs.

Think you had rich idle issues before? with the carbs spray bar under the fuel level in tank you have not seen nothin yet !! :unsure: Scott

 

[Ian Inverarity]

Anders,

Interesting! Are the parts required to do this available seperatley?

I presume that the opening of the drum housing is up towards the boost ports rather than towards the crankshaft like in the other drum setup? Have you tried this version?

I presume this drum is not supported in a bearing?

Ian.

 

[Guest]

The cast drum housing with the carb on on small angle must be the New "Double induction port" Unit. I have a proto type bar stock version, which is the one pictured with the carb set at zero degrees.

The porting is very innovative. It is like having a Picco/CMB style drum and and a K/MAC style drum all in one. The drum has four holes. One in each end like MAC and one on each side like Picco, with a divider plate to direct the fuel accordingly.

Kalistrotov says it provides 50% more flow.

This means the fuel enters the crankcase from the center of the drum like K/MAC And enters the crankcase out the Top like Picco/CMB.

Won't fit in a Rigger very well.

 

[DaveMarles]

What about some pictures?

Dave

 

[Anders_Martinelle]

Ian, i don`t know if you can buy them seperate....

This was made in 2001 so it`s quite old and yes i have seen it in action and i can just say that use the old drum and be happy.......

I don`t have this engine it`s a friend of my so it`s hard to get more photos, it`s maybe ingenious idèa but i just say KISS....

Anders

 

[AndyBrown]

The cast drum housing with the carb on on small angle must be the New "Double induction port" Unit. I have a proto type bar stock version, which is the one pictured with the carb set at zero degrees.
The porting is very innovative. It is like having a Picco/CMB style drum and and a K/MAC style drum all in one. The drum has four holes. One in each end like MAC and one on each side like Picco, with a divider plate to direct the fuel accordingly.

Kalistrotov says it provides 50% more flow.

This means the fuel enters the crankcase from the center of the drum like K/MAC And enters the crankcase out the Top like Picco/CMB.

Won't fit in a Rigger very well.

P.S. That was me!

Newbie

Andy Brown

 

[TimD]

Andy,

Your post count will stay down if you keep logging in as Guest!

I have to say I prefer the carb layout on the older K90 for reasons of carb location more than anything. for me, the performance gain would have to be subtantial to make the change worth doing. Is the original K90 drum / housing the limiting factor in it's performance?

Tim.

 

[Anders_Martinelle]

Is the original K90 drum / housing the limiting factor in it's performance?

What`s wrong with the performance???

The limiting factor in that engine would be the piston in that case.........

Anders

 

[TimD]

Anders,

Have you been having wrist pin failures also? I know you have broken a few pistons.

My K67 now has a 30% silicon billet piston in it - piston fit is definately not loose! :lol: :lol:

Tim.

 

[TimD]

What`s wrong with the performance???

I didn't say there was anything wrong with the performance. I love those engines!The point I was trying to raise was "why change the drum housing unless the new design makes the motor more powerful" Any engines performance is limited by something or another. Whether it be a flow issue or a mechanical failure.....

 

[ALLAN YUEN]

:mellow: Rumor: Is that fact?? The rod would be bushed instead of the needle bearings

 

[Ian Inverarity]

Sounds like an interesting design!

I think it would fit in my riggers... B)

Ian.

 

[Guess Who!]

I WANT TO CRY.....

 

[Anders_Martinelle]

Wrist pin failures also.....................................YES SOME!!!

You will always find weak spots on engines..

Allan, it`s going to be a bushed rod on the 45 engine yes.

Anders

 

[TimD]

Wrist pin failures also.....................................YES SOME!!!You will always find weak spots on engines..

My last wrist pin I got from Al was drilled in from both sides rather than just drilled in from 1 side. The one that was drilled in from 1 side sheared right in the middle, damaged the rod bushing and cracked the piston skirt. I suspect the pin had a hardening issue and was too brittle. Plus I hydraulic'd it pretty hard :blink: :blink:

 

[Ian Inverarity]

TimD....

Shall be know as "He who cant keep a cowl on his SG"...

Seriously tho that boat was pretty impressive to me, and once you have the fit loosened up a bit on that engine it should be a weapon! B)

Nitrocrazed racing: Anyone remember the last nats where I was losing my cowl at about 80mph shortly followed by the boat crashing badly each time......

 

[EatMyShortsRacing]

Ian,

Dont tell me you are going to suggest that the cowl helps the stability of the boat???? Next you are going to say having a propeller helps the boat go forward!!!

Hey just a little item to throw into the debate... Not really sure but I think my original A90HP in my Seaducer had a bushed rod on the top end. That motor has done a lot of work and still seems to pull hard. (may have to pull that one down one day and see how the internals are going, and what is actually in there!!!) Am I missing something or is this top end needle roller business a little over rated??? I can see more troubles than advantages here. The CMB still has conventional top end? Added expense with no gain???

EMS Racing Green.... its all green