Resizing service, anyone try that?
 

Hi,

There are some resizing service in ebay offer to resize worn piston and sleeve to revive engine. Anyone try that? I wonder if its any good....

tried it on a .21 and .12. Engine came back, fast as a bullet.

http://www.buffalo.edu/~jfroth/pinch

only use OSROCKET!!!!!!!

Does it last after the resizing?

Wat i've heard is that resizing the sleeve will only good for another gallon or 2....

Any other feedback would be great.

I am about 1 gallon into my .21, performance is still up there!

I dont know who osrocket is but you cant beat the performance and service of RayA.

hey dude,

Don't use OS ROCKET's service!!!!! Try RAYARACING!!!! he is the best out there..... trust me you won't be disappointed!!!!

RayA kicks ASS!!!!!

I race with him weekly and lots of people at his local track uses his resizing service. Everyone said their engine are better if not just as good as new after resize. You can always ask him what kind of jobs will be done to the sleeve if you send it to him. He will give you IN DETAILS on what should be done and how!!! I'm sure he will show you around the resizing facility.
His service is worthy every penny!!!

Both guys are great, You will not go wrong with either one.

skimpyboy - have you even used osrockets service? just curious as to what was wrong with it.

I haven't used either but I will use one eventually when I need a squeeze, leaning towards RayA right now because ive heard a complaint or two about osrocket oversqueezing sleeves.

got a pretty detailed reply back on RayA saying they strictly don't and you can also like tell them "how much" you want it squeezed and you can have some say in that respect.

but most osrocket customers ive talked to have been v. happy too....

has anyone actually tried both and have a preference? reasons?

thanks

rayA- no doubt!!

RayARacing thread

very happy customers
 

Many many happy customers. Better yet is he will sell the tooling so if you have a club, local raceway or hobby shop it may be worth the investment to do it yourself.

what problems had you all had with OsROCKET's service? I have had about 3 p/s done and there is has not been any problem with thim. Just the only thig is just that when i try to break in the sleeve, its really tight but that is just part of the fun.

Jason

let me explain my experiences with both:

osrocket- in my opinion... too tight of a resize. It wears on the starter box and wears on the sleeve before you even get it running- not to mention the rod.... the poor rod takes abuse here. I had a resize from him and this was just my experience. lost seal rather quickly. this is just my opinion.

rayAracing- in my opinion... best resize for the money. ray is aware of the importance of a seal in the port area and at TDC, and this in my opinion is what makes him superior in his field. if you don't seal the port area- don't bother resizing. pinch at TDC only will gain marginal life and performance. ray is aware and seals (resizes) both areas. his resize will not kill your starter box or your wallet (rod life). heat relieving is also perfromed to relax the metals after resizing. grain flow of the metals is important in these little buggers!!

for my hard earned dollar RayA wins the job every time!! Ray A is also near the top of the points chart at our local track and we trade paint weekly, so I know his stuff performs well!!

Corey DeLong

How do you mean sealing the port area?:confused:

when an engine is "overheated" and loses pinch, it not only loses pinch at TDC but also in the port area. Ray A also returns the seal in the port area by pinching there also- not just TDC.

Here is my little test- remove your engine from the car and give it a good cleaning. Hold it with the exhaust port facing up, the piston covering the exhaust port, and place about 3-4 drops of marvel mystery oil right in the exhaust port so it is laying on the piston. Now slowly rotate the engine through it cycle, carefully observing the edges of the port area. If your engine is sealed well, you will not observe bubbles as the piston passes the port. If the engine has lost seal, you will see bubbles form as the piston passes the exhaust port area. You can really gauge the seal on your engine weekly if you do this. A new engine will not bubble at all as the piston passes. As it wears, the piston will travrel closer to TDC before bubbling stops. When it bubbles the entire length of the stroke- send her in for resizing, but most likely you will have already noticed symptoms of this in the tune.

You should really email RayA for a detailed overview of his process.

Corey

re-sizing and ceramic coating
 

There is another person that does resizing and also ceramic coating: rc-performancecoatings.com I personally have had my engines coated and resized. Check it out.:nod:

just don't get caught with that ceramic coating as the only ceramic allowed in an rc engine is the bearings... check the rules.

Rules
 

I have checked the rules .... and you are right. But this is a coating not a part! And the rules doesn't say anything about coatings. So there:nod:

Video of RayA resizing service

http://www.rayaracing.com/video.htm

Nice video for sure!!

Any of you needing service I would definetely recommend trying out RayA!!

The amount of time he spends on your P & S set he probably makes $10/hr!! He's not in it for the money, that's for sure- it's all about the hobby!!

I'm sold its worth a try to bring back a 160$ motor.

Great video. This guy definetly knows his stuff. I agree he is not in it for the money.
Great Job Ray.

Thanks
www.twistertires.com

Omar- Ray is top notch. Give him a try if you ever need a freshening. We are going to try to make it to the Toledo Gas Nats, so we may see you there.

Corey

definatly dont spend your money on one of the "do it yourself" deals on ebay, If you dont have the knowledge/experience, your engine will barely make it past break-in. myself and 2 buddies of mine bought 1 and we got about 2 races out of them after the break-in and con rods that needed to be replaced. so, for the record, just send it to the pros and forget about it pretty much.

For $17...........I don't see why I have to do it myself......
Beside, I don't think I am not happy about OSRocket's service, but again, my redone MT-12 wasted almost 1/2 of its resized life to get it UNLOCK.....it is simply too tight...oversqueezed...

And after reading RayA's site and the video...........my $17 is definitely going toward to his pocket.

New 5 port Nova Rossi P/S = $110 plus.....and god knows where I can get that from.....

Resize service........never like new, but will last me 1-2 gallon more..........$17.......

Just simple math.........;)

what do i need to send to ray exactly.. for example what parts will i have to ship, C-clip, piston, sleeve, casing?