dreaux

iTrader: (5)

I just pissed you off. Should i believe you






J/K

boomgagem

iTrader: (45)

LOL, always a treat reading some of these replies. ahahaha

Roelof

Why not do it yourself ?

This can be bought at any (large) hardware store:



It is a clamp for a milling machine

bigjayjay1

iTrader: (86)

Dion does awesome work highly suggest great price and super fast turn around.

rageworks

iTrader: (47)

Were those marks on the inside of that sleeve
made by your milling machine clamp pinching
process? Are the marks stress cracks in the chrome
lining of the sleeve?

Roelof

That is an old broken sleeve I did use to experiment with:



With such a small ring the results are even better, all the forces of the clamp are combined on the ring. Last week I pinched a sleeve for a friend, the piston could almost be pushed out on the top of the sleeve, it was far gone. After the pinch with this tool the piston could not be pushed further than just above the exhaust like a new P/S set.

Such an holder with the right size clamp will cost you about 80-90 dollars I think.

dreaux

iTrader: (5)

that is very cool. It will take some looking around.

google here i come!

dreaux

iTrader: (5)

O.S. probably laughs everytime someone orders and P/S


What happens when the piston keeps wearing down?? Just keep repinching?

Roelof

If you have the tool you can always give it a try. A fellow clubmember has the tools from Ray and he is using a fresh enginge for the nationals and is using the pinched ones as spare, training and clubrace engine. His experience is up to 3 times but then it is not thad good....

dreaux

iTrader: (5)

i thought the tool that ray use's is like 5 or 600 dollars?

ABURTON

iTrader: (24)

What thats going to do is pinch your sleeve down onto the ports. You need to also spend the time and research to get that machined out and tapered so you can give a proper fit. I would not just get that and start trying to pinch. Most of the upper end tools have this done. The one our shop purchased from BMR racing products is one of the smaller compact models and I feel works great. It can easily be taken to a race with you should you need it. It cost around 450-600 but it has all the time invested into making sure your doing things right.

Our hobby has several experienced people who can do this service for you. It's worth it to pay to have that done and done correct. I own a shop called the speed shop, we do this, engine rebuilds, bearing replacement, break ins, etc. Check us out, we have a thread in this forum. We have great references and do quality work.

You can also check with Ray, and the other guys mentioned on here like Dion.

Thanks,

AB

Roelof

Well, I am not the only one using this tool, there are more using this with succes. http://www.rctech.net/forum/exclusiv...inching-2.html

If you want to do it right you must also use a special grinding rock (do not know how to translate it) to make fresh scratches into the chrome layer and that one is also in order.
I just bought it trying to fix some old stuff I have and it is fun to learn, as mentioned I have used some real old (broken) stuff to understand how and now I know how.

And I understand your reaction, if anyone can do it there is no market anymore. The 15 dollar Ray is asking is a very good price but the hundreds of dollars for an own set is to expensive....

RayA

iTrader: (23)

Quote:
Originally Posted by dreaux
I was going to send one of my P/S sets away to rayaracing to get pinched.

1. is it worth it. Does it work well?
Like new again
2. How many gallons can you expect on average out of a resizing?
depends on how you run the motor another 5 gallons is easy.

3. How many times can you pinch it?
depending on the engine
2 or 3 times. really depends on the sleeve though.
Thanx



Let me chim in here and first elaborate a TAD the number of resizings per one piston + sleeve set.

We get "one" mabee "two" GOOD resizings out of a piston + sleeve set of approx 0.0004" each service. After 6-8 tenths geometric tolerance's between sleeve to case fit effected is hindered causing engine to loose a little snap. In testing an engine (going to extrems) with P+S set altered 12 or 13 tenths one thousandth an inch I found very noticeable its first 3 or 4 laps with ballistic (drop its nuts) performance on the track, and loose its nuts on the 5th lap or so. Note this is a set that damaged from air filter falling off once and a E clip another time requiring two times honing liner its 11 gallon history. Point here is I do alot of testing ....Good candidates along with worst case scenarios. Properly resized engines run very strong while in range if and when dimensioned corectly. Remember, a substandard resizing compromising good engine parts is something else to concider when selecting a resizing service. Ask to see a picture or vid of their equipement/process.

bigde2001

iTrader: (10)

Thanks for refering me CrazyFast1 and bigjayjay1. If you need my service I will be glad to help you out. You can email me for details at [email protected].

RayA

iTrader: (23)

Dion has resizing tooling designed to resize sleeve cylinders,reforming the sleeve alloys using internal and external control. state of the art equipment