New CMB 91 MOTORS

[ianfolkson]

The aluminium sleeve CANNOT be removed.
It is designed to push the gases into the small port at a higher speed.
This system has worked before with good effect on special works engines built by Mauro and his father for team drivers. I still have one of them.

 

[Jeff Lutz]

The aluminium sleeve CANNOT be removed.
It is designed to push the gases into the small port at a higher speed.
This system has worked before with good effect on special works engines built by Mauro and his father for team drivers. I still have one of them.

It still looks like that sleeve could be removed, but I’ll take your word for it. Alot of USA racers are use to modifying the port passages to their liking or correct misalignments from factories. The GPX .91 looks to be marketed more for the European market. At least they offer the RS3 with options and it is more like what we are use to. The new water cooling system is better for us also. Jeff Lutz

 

[ACTION JACKSON]

Ok people explain how you replace the liner in the one 90 that doesn't come out. What's going to ware just the piston. & what's it going to cost to replace .
Do you have to send it in.

 

[ACTION JACKSON]

Ok people explain how you replace the liner in the one 90 that doesn't come out. What's going to ware just the piston. & what's it going to cost to replace .
Do you have to send it in.

Never mind. It's that they placed an aluminum liner in that can't be taken out. Then you put your standard liner in.

 

[dwilfong]

Now that looks interesting.
I bet the inner liner will come out if you heat the case up.
Then you can make adjustments to the runners as needed.
Bet you could also make your own inner liner to do some fancy runner short side adjustments.
You could also fit any older liner in this eng with a new inner liner made for it.
This is a whole new world if you ask me and in the right direction.

 

[ianfolkson]

You can try to get it out at your own risk case is heated then ali sleeve is pressed and loctite in.

 

[dwilfong]

You can try to get it out at your own risk case is heated then ali sleeve is pressed and Loctite in.

Yes that may be a little hard with the Loctite on it.

 

[dwilfong]

If you buy a new case will it come with out the sleeve installed?
Can you buy the sleeve and case separate?

 

[ianfolkson]

If you buy a new case will it come with out the sleeve installed?
Can you buy the sleeve and case separate?

Sorry not available seperatly case heated and ali liner pressed in and glued All cases assembled complete at the factory.

 

[ACTION JACKSON]

So what's the price for these beasts. Hope not 700.

 

[Joe Warren]

The M91 Engine was Sold for $950 USA Prices 2 years ago. GPX 45 USA Prices $750 ...... You will have to buy out of the country to get a good price.

 

[Timbo Whalen]

So what's the price for these beasts. Hope not 700.

Present day, 91 M-Line is $736 + shppg + International transaction cc fee.... Tony Grinter of Hobby Supplies of Australia hasn't posted 91 GPX pricing yet.

You'll have to check with Stu Barr, but don't think he plans on bringing them into the US....again, you'd have to talk to him directly to find out if he'll do a special order.

It seems CMB has had 2 price increases over the last 12 mos....the Italian economy is not in the best of shape, either....Italy has sustained negative growth for more than a decade, and there are no signs that a return to growth is in the future. Political instability is the common result when the standard of living starts to decline....just a 'FYI'.

 

[Anders_Martinelle]

I got excited for a second, but looking closely looks like there is a pretty bad mismatch between the case and the aluminum liner. Look at the transfer port below the exhaust side eyebrow. Do you know of the aluminum sleeve can be removed?

Thing is that the missmatch of the third transfer port is that it will be a port instead of nothing there. So it should be like that. If it`s good???
The missmatch on the transferport towards the boost is not so good and may need a dremel mod.....
I have a hard time to understand why you want to go from a extremly stable linear to a alu/brass solution??

//Anders