66e engine

[tofa]

Just a little update on my 66e build...The bed plate we made had to much flex in it and the engine kept hitting the side of the hull so we have made a beefer one and moved the motor back 45mm by using a stub shaft from a blaster3. Motor wise its going well with the b pipe and twin 46mm carbs.Im looking into lightening the stock flywheel next to try and get it to rev a little quicker.

 

[SXR-FOREVER]

motor runs good with the adaptor plate and bpipe?

 

[tofa]

motor runs good with the adaptor plate and bpipe?

Yea it does...Id like to try a limited chamber to see if its any better than my mod but yes it runs very well.

Ive got a 760 62t motor with ported cases and mild ported cylinder running a b pipe ada head 44sbn and rad flywheel and i say the 66e motor hits just as hard but feels smoother if that makes any sense lol but pulls so much harder up top and keeps pulling.

 

[yamanube]

Your pipe clears the hull with an adapter plate? What kind of valves are you using?

 

[vomitspot]

you need to post some pics!

 

[tofa]

Your pipe clears the hull with an adapter plate? What kind of valves are you using?

With the strenghting rails ground off the hull it does...just to be safe i dented the side of the pipe at the coupler by 10mm.
Im just running the stock powervalves with the servo motor at the moment...

I will try and post some pics for you...Im handy in the shed but retarded on a computer lol.

 

[yamanube]

Here are Tofa's pics.

 

[tofa]

Thanks for posting the pic yamanube

 

[yamanube]

So it looks like you cut the mounting flange off of the manifold and welded a new one on? Those water fittngs on the side go into the cylinder because the jackets are welded up? Looks like it fits pretty well, is the top flange cut and rotated or what is that weld for?

 

[vomitspot]

looks spaced up to me
jason

 

[superramjet]

the ats guys should share their pipe pics

 

[RiverRat]

My experience with this motor (w/ pfp pipe) is that is easily makes more hp than a 62t but it does not rev as fast or rev down as fast as a t motor. Even with MSD TL (which is must) it really needs a lightened crank. If someone builds one of those the 66e would be a monster!!

BTW, nice work on the manifolds

 

[tofa]

So it looks like you cut the mounting flange off of the manifold and welded a new one on? Those water fittngs on the side go into the cylinder because the jackets are welded up? Looks like it fits pretty well, is the top flange cut and rotated or what is that weld for?

I ground 5mm off the manifold to allow for the 5mm spacer then ground all the mounting holes off and welded around the outside...then got the porting tool and matched the inside ports to the 66e gasket..then welded up the holes where i had gone into the water jacket then match ported it. Only one of the water ports lined up so i used that plus the extra ones going to the side of the cylinder...it works fine and the coolings just rite[well just rite for this cowboy lol]...I had to weld a 16mm spacer to the top of the manifold to get the header to clear the powervalves[with a little grinding to the back one]..I havent had to cut or weld my header yet and will only do the if i can find some low profile gas valves.

I will send some pics when i remount it in the ski

 

[SXR-FOREVER]

Looks good. If that spacer was any larger (lets say an inch in total) Would the headpipe smack into the side of the hull?

 

[tofa]

Looks good. If that spacer was any larger (lets say an inch in total) Would the headpipe smack into the side of the hull?

Yes it would...even with me taking 5mm off the manifold to start with its still very close...Its not the header pipe that hits its about the first 100mm of the chamber that rubs

When i remount the 66e i will take some more pics of the places i had to dent the chamber to clear the motor and hull.

Its just about xmas and its summer here so ive got my trusty 771 back in for now.

 

[SXR-FOREVER]

I'm trying to figure out how much room I'll have since I have a little wider hull...

Man I wish I had a spare manifold layin around to cut up.

 

[tofa]

I'm trying to figure out how much room I'll have since I have a little wider hull...

Man I wish I had a spare manifold layin around to cut up.

Messure from the centre of your drive coupler to the narrowest part of the hull where the pipe will be and then mok your engine pipe combo up using those messurments...you may find you have plenty of room?...

 

[tofa]

After a long summer waiting for my busted knee to heal i finally got the 66e project back on the water.
The ski runs and handles awesome now with the motor moved back and the powervalves working.
When i first tried it the motor was to far foward and made the nose of the ski sit down and made the ski feel heavy...I moved the motor back by using a short shart from a blaster 3 and what a differince! The skis sits better in the water and nose rides at a nice hieght.
I bored my mainfold and header pipe to 50mm and replaced the cables to the powervalve[i still run the servo motor] that were breaking and stretching and not working he valves rite. All in all very happy with the power and handling of the motor/ski combo.
Thanks to everyone on here and in new zealand for all the help and advise.

The final package is:
Stock hull with lowered hood,foot holds,ac -2 pole
800 66e engine with lightened stock flywheel,twin 46sbn carbs,riva ignition,factory B pipe with stock water box
Works 205 intake, stock ride plate and hooker 10/16 prop

 

[vshockey10]

what is your jetting at if you dont mind me asking? just looking for a starting point myself with 46's on a 66e

 

[tofa]

what is your jetting at if you dont mind me asking? just looking for a starting point myself with 46's on a 66e

120 pilot
135 main
2.3 n/s
115 gram spring
low speed at 11/2 turns out
high speed at 1/2 turn out

Its a little rich at that but still feels good all over and i can run it all day at any speed without worrying about it