BC

Hello all,

I am specifically looking for those of your whom have had thier blocks sleeved with ANY of the available materials. Chomemoly, Steel, Ductile Iron, Unobtainium.

I am interetsed in this as I am conducting a bit of a research investigation into the wear characteristics of this proceedure, long term.

I thank you in advance,

*eurospeed951*

Talk to john at SFR. He is putting chromloy sleeves in mine.

BC

I did actually. I spoke to both JOhn AND tim about this, and they gave some real good info. I am looking for others that have gone through this.

How much are you boring your engine out to?

*eurospeed951*

106mm

lordgrommit

Brandon-
You may want to look at Moto Guzzi sites too.. alot of those guys sleave the cycle engines in Chromemoly. The stock is chromed steel that wears badly.. Intrestingly the aftermarket Total Cylinder replacement is using Silicon impregnated Alu just like our blocks.

Matt

Danno

Some people have mentioned problems with sleeving where the sleeves come loose and slip. This is partly a problem with having steel inside of aluminum because of the different rates of expansion (aluminum expands faster than aluminum for the same temperature increase). Then the sleeves are no longer tight-fitting.

The way around this is to use sleeves that have a 2mm lip on top (the sleeves look like a T from the side). A 2mm ledge is milled from the top of the alumimum cylinder to hold the lip of sleeve.

Procedure is usually as follows:<ol type="1">[*]overbore block to accept sleve[*]mill ledge on top of cylinder [*]press sleeve into block under high temperature[*]bore out sleeved cylinder for roundness and/or taper[*]mill top of block for flat deck[/list=a]

Once the cylinder head is bolted on, there's no way for sleeve to move in any direction.

BC

Do you know exact who does this ledge process Danno?

I am very interested in any info anyone can muster.

If the "Total" place is sleeving with our material, then it returns to my originial assumption that the sleeving is a compromise when you do it our blocks. Ugh. Frustrating trying to find good info sometimes.

BC

It also seems to me that it WOULD be a good idea for reinforcement of the block for boosting. Quite a few people do not even think twice about doing it. I am simply concerned with getting the best material for the sleeve, and not having it fail, as Danno suggested.

BC

Is total Cylinder replacement a company? Does anyone know of exactly what alloys are the choices? Chromoly, Ductile Iron, Etc?

951and944S

Hey Danno,

[quote] (aluminum expands faster than aluminum for the same temperature increase). <hr></blockquote>

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David Floyd

John @ SFR is using Rolls Royce cromoly sleeves in my new engine 106mm bore, same as Eurospeed951 and John himself has this setup.

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BC

David - do you know how the sleeves are being put in? I am not sure if John gave me this info when I spoke to him at the pizza run. Danno's "Champfer" notion sound svery good.

David Floyd

Brendan,

Not sure how they are going in, I hope it is like Danno explained, but either way John has had no problems with his.

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John Anderson

THey are just as danno said, we have the sleeves made with a lip at the top that hangs over the existing cylinder..then the block is decked. This lip allows the head to press against the sleeve, holding secure. It looks like if you were to look at a cross section of the sleeve...it would be L shaped but upside down...and its lips is actually about 6mm wide...plenty of ledge for the head to hold.

Guys..all with blocks on order...JE informed me, two more weeks...They told me a couple weeks agao they would be in by now...I know, it sucks.

To counter this problem...SFR is now working with a machine shop in designing our own pistons. These will be available for stockers (plated as needed, extra wide ring lands, for high performance engines) and will have the first proto out for photos in about three weeks.

Take Care!

John Anderson

ooops.....I forgot to say, our new pistonns will work with stock blocks as well as big bore engines. We are meeting almost on a daily basis with the engineer.