Had a few sleeves serviced by RayARacing (photo intensive)

[olds97_lss]

All I had him do was do a mild pinch on all three engines.

The engines are a SH28, Dynamite Mach 427, XTM 24.7.

The XTM had pinch still, but it was acting goofy late last season, so I figured why not send it in with the other two. The other two are a buddy's of mine and I'm getting this done for him. Neither of which would hold a tune, stalled constantly, ran hot and wouldn't idle hardly at all.


EDIT:
For those that missed it on the end, the cost is $25 (for pinch+priority ship) for each single sleeve/piston shipped if you do individuals. I did 3 at the same time, so it was $55 total.

This is a link to Ray's site: Ray A Racing Sleeve Service/Tooling

You can find the Resize Order form on his site. He responds pretty quickly to emails and is generally a decent guy to talk to.



Pics of the before:

Click here


Click here

XTM 24.7:

Click here

SH28:

Click here

Dynamite Mach 427:

Click here

Photo's after:

XTM 24.7:

Click here

Mach 427:

Click here

SH28:

Click here

It seems he did a nice job on the XTM as I've put that engine back together and put it back in my buggy. With the GP out and it being lubed with ARO, it will turn over with the pull-start. Not easily... But I shouldn't have any issues re-breaking it in.

The other two engines were in far worse shape (as noted by Ray) and as you can see in the photo's. The piston would easily push out the end of the sleeve.

The "after" photo's are set where I could push the piston in as far as I could by hand (without a large amount of force), so you can see where the pinch now begins.

I'll post results after all engines are put back together and we get them broke-in again and running.

Just thought I'd share what can be done to an old tired piston/sleeve for $25 shipped (less per set the more you do at the same time).

[Bryson]

Good write up! I think when my os gets a little tired I may have it pinched beings they dont make the sucker anymore lol. They look really tight now. Cant wait to hear how they run.

Bryson

[olds97_lss]

I spent $55 shipped for all three to get worked on at the same time. He also cleaned up the piston tops to get the carbon buildup off. He didn't touch the sides at all. I sent them on a Monday via USPS priority and got them back the following Friday.

If nothing else, he has great service!

[Rolex]

That's looks like a great pinch and great service. I think you should post his link for future reference.

[Mattyfats420]

what does that mean "pinch" just confused by the terminology

[Cupooterluvr]

It means they compress the sleeve so that the compression is like new. Nitro engines don't have rings, they seal by way of a tight fit between the sleeve and piston. Pinching them renews that seal after they lose it.

[Rolex]

The cylinder is actually tapered to provide a tighter fit the higher the piston goes. When your engine just doesn't have enough compression to run right any more, this is actually an inexpensive rebuild process.
When you get it back, you have to go through the break in process again, just like you would with a new engine.

[Cupooterluvr]

what he said.

[Racer 1966]

Nice post Olds, don't forget to update when you get them running, I'm very interested in how well they work.

[jon2]

Hey Olds,

How much did you pay for each pinch? I may want to do that for a Mach 26 to get my LST2 project rolling. How long did it take?

Please post contact info.

[CharliesTheMan]

I noticed he paid $55 for all three of them to be pinched, he sent them in on Monday and had them back on the following Friday. Hope that helps Jon.

[jon2]

Thanks Charles, I thought the price would be different due to the amount...Is the cost different for a pinch other than "mild"?

[SMaxxin]

Originally Posted by jon2

Hey Olds,

How much did you pay for each pinch? I may want to do that for a Mach 26 to get my LST2 project rolling. How long did it take?

Please post contact info.

Old age is catching up with you Jon

http://www.rayaracing.com/

"Just thought I'd share what can be done to an old tired piston/sleeve for $25 shipped (less per set the more you do at the same time)."

"He also cleaned up the piston tops to get the carbon buildup off. He didn't touch the sides at all. I sent them on a Monday via USPS priority and got them back the following Friday."

[ohmygahitscoby]

Are the sleeves suppose to keep the pistons from going more than half way of its size? I saw in their video that they could only push the piston up until the midway mark.

[Rolex]

That's where they start to get tight and the compression starts to build.