chrome plated cylinder and steel lined one

amtnick

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Jul 15, 2008
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hello ,everyone
someone says the standard chorme plated cylinder is better than steel lined one,

could anyone offer me some picture to show them?
and tell me why chrome plated cylinder is better ?

thanks
 
what benefit does a steel lined engine give you? Considering the weakest link is still the connecting rod bearing even after using a needle roller bearing....
 
On small displacement two strokes its more economical to simply chrome the bore after finishing than make a steel sleeve and the associated operations in its manufacture and it adds an additional asssembly operation.(provided its not cast in place) Where weight is a consideration such as hand held lawn tools its also a factor.
It also doesn't have any heat transfer issues that a steel sleeve has.
Some feel that chrome maybe be lower drag than plain steel. It certainly offers long life.


On chrome bore cylinders the transfer ports are open to the piston motion, some feel that is a draw back to performance.Score one and its life is over.
The other hand a steel liner giver you the ability to easily rebuild the engine if the OEM supplies oversize pistons. It also gives you "closed" transfer ports.On high performance engines it allows for options such as "boost ports" and bridged exhaust ports.

The best two strokes I've worked on had chromed steel sleeves.
 
On these Barrells the Intake and Exhaust ports are the ones for the 3mm Bigger intake and exhaust flange Alot closer to a tuned Jug as this Sleeve is STEEL and I beleive it is set in Cast Iron. These are heavy. I can get them. I have the option to on my Engines I just dont have the Carb or Exhaust at this time. The Chrome Is a lot lighter and will have less friction(More power) But the port size difference and port timing would allow further power increase. Pretty durastic. I beleive you can get a replacement Carb (the 3mm LargerTube and Carb) from(Grube) Spooky Tooth Soon.or(http://www.pccmotor.com/22mm-carbure...r22505050.html) direct to Intake Port mount! He also has some tuned off road pipes that would be nice to add a Catalytic converter too. I offered to do the design to Don but so far He'd rather me become a Distributer For Him before he sent me a pipe or 5 at a certain low price to start working with( a come up of a really sound Idea) and that I should just purchase the Pipe off Spooky Tooth. So hes not really concerned with the whole touching Bases with the On road thing with these. He actually sounded more like he wants to pay for the tools that he bought to produce the Rat Expansion Chamber FIRST And I cant say I disagree. They are going to have to get a Spark arrester on them before they are ORV Registerable. So **** push them till its paid for and well find a solution. None of us are rich. But we seem to getter done . . Oh Spookys got 30 Expansion Chambers coming hope they are available to the General public instead of the people that tear up Lawns. They wont last long that way any how.

PM ME if you guys need to do a 20+ KIT order for the steel sleeve engine Ill do 20 at a time but Ill need to know before my next order (28 days). In two months you can order one at a time for $145 without the shipping. but 20+ orders will be closer to $118 a peice shp hndlg Im not sure how much. probably $20 to $40 pc. Depending on where your at? If this is a vendor thing since I gues sit is an Offering to our people could it stay in both places if not I'll re Write. Any Questions or copies of the EPA Ill have a copy for each and every one if need be. Furthermore each engine will have factory logo and data plate with EPA stamped into The Block.

This is the link of the carb for the new port size on this engine (Steel Sleeved)22mm
http://www.pccmotor.com/22mm-carbure...r22505050.html
 

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Wow...that new jug sounds pretty sweet....Any idea on the power increase one can expect from that along with the revised/latge intake system?

Just curious but any idea on why the Super Rat expansion chambers are so hard to come by?...I have seen pics of them for years so they are being made already just not imported to the USA....Any idea on rough prices for these?

Interesting stuff just around the corner!

Andrew

PS - Maybe some beefier / higher quality bearings sometime in the future to make all that extra power last?
 
Hello Andy

The newer engines are starting to revolute on 203 bearings and they are a pretty rock solid bearing. I beleive they are sealed on both sides/. I requested them on the Build I am having sent to me Now. I can get 6203 or 203's here in my area but you've got to know where you got your engine so you can order you Case Gasket. Gotta split the case. I've tor into a couple of distributers units. I currently have a Tiger Boygo fast and Old Pico and another Cast Iron for inspections 202 was the more common main bearing. Tiger had needle lower end. I didnt Split the Boygofast HUGE carnk but like I said I didnt look at the bearings. From the outside the Pinion Gear behind it looked like a 203? but I dont know if it was double sealed. The Japanese mainbearings are common or the Chinese arent behind! The Lower end neddles are realy long some different lengths but looked solid. Lower end on all of them if taken care of are probably what they refer to as a 10,000 mile engine. Id say without rings5k if you replace the rings at the first sign of blowby youll have a really tight sea in there. The nicasil they are Chroming with is 2nd to none when done on a smoothe straigh within tolerance bore. Your likely to see them now as the chinese are selling to people competing to have the best and Grube and (mainly) the Japanese to Compete with. New styles and Ideas are really raw on this level of engine and can not be Pattened so what the Big Buyer is doing is throwing thier weight around getting contracts and these factories experience a short break through but soon they all have it. and the contracts go out every one gets em until they run out of Ideas for a while then they Bring up things they did and blame others. Heh you can get what you pay for or look and hope to find what you think you need but in this game only name brand competitors Like Yourself will be remembered..So I Think the Factory is the place to begin asking about the bearings If you want to order them the upgrade is penuts to them they are loyal and are very much like the US when it comes to knowing what they want.Ideas actualy have bought contracts there because it is by word of mouth that they upgrade. It is the Time to get in there and get started with aN efficient Wide band Pipe matched with a free flowing(since a lot more gas are going back to the chamber to be burned) Catalist with a basic muffler/spark arrestor for the tip tip. I will help on this I guess Im just being lazy. I need to get info to write a basic program that will take into consideration of poste exhause waves and density and the devices characteristicsvs/ design Dimension. There is programs but the band is less vigourous and the gas has less oil in it.
 
.....PM ME if you guys need to do a 20+ KIT order for the steel sleeve engine Ill do 20 at a time but Ill need to know before my next order (28 days). In two months you can order one at a time for $145 without the shipping. but 20+ orders will be closer to $118 a peice shp hndlg Im not sure how much. probably $20 to $40 pc. Depending on where your at?

This is cool!
If a steel sleeved engine kit is only $145 + shipping, I think you will sell many of them. I think that there are quite a few people like me that will gladly pay extra for kits with a steel lined cylinder!

Do the kits have a roller chain tensioner? How many teeth does the rear sprocket have?
 
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