circle crank ms660

[jmssaws]

What do you make of this @awol?

 

[jmssaws]

Maybe I should mail you my 661 to try. I'd like to see where she lands in the pecking order

What are the stock timing numbers again ?

It's 100 123 83 right now.

 

[drf256]

I'm confused. Which is stronger?

The stock crank or the full circle?

 

[Moparmyway]

Its alot of work if it dont work, but I just can't escape what the hack wizzard said.

You COULD raise the exhaust to 99 or 98 then run it. Mike does have a quiet way of being right

 

[MustangMike]

If it is that strong, I would leave it alone! Don't ruin lightning in a bottle, it don't happen often!

If you want to play, port a different jug.

Didn't you say the piston skirt is longer? Maybe it just likes it that way, and you have discovered an easy way to make them scream!

 

[Moparmyway]

Stock crank appears stronger Doc

 

[jmssaws]

I'm confused. Which is stronger?

The stock crank or the full circle?

I think it's stronger with the stock crank doc,I'm going to port it and try them both again.

 

[Moparmyway]

J, if raising the exhaust a degree or two doesn't work, is there room to cut the base some more ?

 

[jmssaws]

If it is that strong, I would leave it alone! Don't ruin lightning in a bottle, it don't happen often!

If you want to play, port a different jug.

Didn't you say the piston skirt is longer? Maybe it just likes it that way, and you have discovered an easy way to make them scream!

It's completely stock and I believe it will run with a lot of ported ones.

 

[awol]

Dunno for sure...........

Is this the first 1122 you have tried a 288 piston in?

I would start with the trans; get em flattened out and squared up. That will tell you what else it needs, at least in part. It's all one big experiment!
If you don't wanna grind on that good cylinder, experiment with one that's not so good!

 

[jmssaws]

J, if raising the exhaust a degree or two doesn't work, is there room to cut the base some more ?

I can cut more,I'm going to leave the exhaust for now and just raise the transfers and intake

 

[smokey7]

Well you can't go back to a 66 piston unless you cut the piston a ton right? If the skirt is wider is it any different in length? Something has to be going on. I've seen a fair bit of 66s and only a few seem as nasty as that in such a mild form. I have a couple of saws with compression increased only and really like them that way.

 

[Redfin]

98/120/78

 

[jmssaws]

Dunno for sure...........

Is this the first 1122 you have tried a 288 piston in?

I would start with the trans; get em flattened out and squared up. That will tell you what else it needs, at least in part. It's all one big experiment!
If you don't wanna grind on that good cylinder, experiment with one that's not so good!

First 288 piston saw yes.

 

[Redfin]

I can cut more,I'm going to leave the exhaust for now and just raise the transfers and intake

How much further can you cut before it freeports?

 

[Moparmyway]

I can cut more,I'm going to leave the exhaust for now and just raise the transfers and intake

I like that, but what if Mike is right ?

 

[jmssaws]

How much further can you cut before it freeports?

Alot

 

[beaglebriar]

Subbed......Great thread!!

 

[jmssaws]

I like that, but what if Mike is right ?

I think 98 is where a 660 is going to be strongest but raising the exhaust is the last thing I'm gonna do.


Any guess on compression? I haven't checked it.

 

[Moparmyway]

I think 98 is where a 660 is going to be strongest but raising the exhaust is the last thing I'm gonna do.


Any guess on compression? I haven't checked it.

IIRC,
You cut .050 from the chamber ?
You cut .100 from the base ?

I'm going on a real bad memory, please correct them numbers if I messed them up

I'd say youre close to 220-230