661 Stroker

[mdavlee]

Here.....
Now...
Pickin the splinters out still...

This one time at band camp......

 

[RI Chevy]

Yup

 

[mdavlee]

Yup

I’d there still a burnt popcorn smell and empty beer cans everywhere?

 

[RI Chevy]

Lol.

 

[MustangMike]

All is well that ends well!!!

 

[popopboat]

Hello everyone, dont know if someone has already asked but, is it important how much clearance is between crankshaft counterweights and crankcase walls?
I meant, what would happen if i made crankcase walls thinner, thus increasing volume of crankcase.. (+ all other port works)
Would that cause anything unwanted?

 

[PA Dan]

Hello everyone, dont know if someone has already asked but, is it important how much clearance is between crankshaft counterweights and crankcase walls?
I meant, what would happen if i made crankcase walls thinner, thus increasing volume of crankcase.. (+ all other port works)
Would that cause anything unwanted?

I believe that would be taking things in the opposite direction of where you want to be.

 

[Deets066]

Hello everyone, dont know if someone has already asked but, is it important how much clearance is between crankshaft counterweights and crankcase walls?
I meant, what would happen if i made crankcase walls thinner, thus increasing volume of crankcase.. (+ all other port works)
Would that cause anything unwanted?

I wouldn’t get the case too thin, if you keep about .020” clearance on the big end of the rod then you should end up with about .046” clearance on the weights

 

[Redfin]

Hello everyone, dont know if someone has already asked but, is it important how much clearance is between crankshaft counterweights and crankcase walls?
I meant, what would happen if i made crankcase walls thinner, thus increasing volume of crankcase.. (+ all other port works)
Would that cause anything unwanted?

I was told to keep .04” on weights to minimize windage loss.

 

[Deets066]

I was told to keep .04” on weights to minimize windage loss.

I believe we ended up at .042 with yours.

 

[Redfin]

I believe you.

 

[Redfin]

Just gonna leave this lil slab of 58mm goodness right here.

105.6cc come on.

 

[TreeLife]

Just gonna leave this lil slab of 58mm goodness right here.

105.6cc come on.View attachment 274195View attachment 274196

 

[Deets066]

I’ll be ready.... soon as I finish up the rest of 2020 madness. Then I have a few saws to finish up.

 

[Mastermind]

Cool stuff you fellers are doing.

 

[mgr1]

Just gonna leave this lil slab of 58mm goodness right here.

105.6cc come on.View attachment 274195View attachment 274196

Any side by side with a 395xp piston?
Looking for a 12mm pin piston and a 661 is a 12mm.

 

[Mastermind]

395XP piston on the MS661.

 

[drf256]

Any side by side with a 395xp piston?
Looking for a 12mm pin piston and a 661 is a 12mm.

A 395 piston and pin will fit in a 660 crank small end with a 395 pin bearing. That much I can tell you, I’ve done an 066 56mm big bore with a 395 slug. They are quite a bit heavier than an 066 slug though.

 

[Mastermind]

A 395 piston and pin will fit in a 660 crank small end with a 395 pin bearing. That much I can tell you, I’ve done an 066 56mm big bore with a 395 slug. They are quite a bit heavier than an 066 slug though.

On the stroked 661, the 395 slug has to be shortened a bunch.....then can be put on a hell of a diet.

 

[drf256]

On the stroked 661, the 395 slug has to be shortened a bunch.....then can be put on a hell of a diet.

Yes, pretty sure it got the lathe on the skirts treatment.