Sleeving a S65, inherent issues

[8k3]

It seems both Ferrari and McLaren sleeve their cylinder walls with great success. Now in the time I've been on the board, I've seen few if any successful S65s that have been bored over and sleeved; few exist but the ones that do have blown up. Can experts (VAC, tuners, etc) explain why (AlSi not very compatible with steel??)? I'd like to increase the boost and bore my motor one day hence my curiosity.

[SYT_Shadow]

Steel transmits heat much worse than aluminum. 4x worse.

Why would you want to sleeve when the stock alu bores are already specifically treated to make them extremely hard?

We have a 825hp VT3 (ESS) car that has run around 20k miles without sleeving. Do you plan to go beyond that?

[8k3]

Originally Posted by SYT_Shadow

Steel transmits heat much worse than aluminum. 4x worse.

Why would you want to sleeve when the stock alu bores are already specifically treated to make them extremely hard?

We have a 825hp VT3 (ESS) car that has run around 20k miles without sleeving. Do you plan to go beyond that?

Good point about the thermal conductivity differences. That said, however, Ferrari/Mclaren motors are sleeved and reliable.

Drew's car, if that is what you are referring to, I believe is still only 4.0L. I'd like to run 4.6L but fear that the wall thickness is too thin with significant boost (say 14+ psi).

[SYT_Shadow]

You could get to 4.4L without sleeving or boring the block out. Something to think about

Hopefully RG, aussieM3 or BMLVR will chime in

[kawasaki00]

From what RG and I have talked about most of the sleeved builds are no longer running. Not sure if it is from the sleeve failure or other means. Will get back to you on it.
I would not sleeve it unless you have already blown it up once.

[8k3]

Originally Posted by kawasaki00

From what RG and I have talked about most of the sleeved builds are no longer running. Not sure if it is from the sleeve failure or other means. Will get back to you on it.
I would not sleeve it unless you have already blown it up once.

Cool. Look fwd to understanding this more

[gobuffs]

Interested in this. I have a block with only bore damage. Would like to get it fixed.

[Soorena]

My engine is sleeved. Working on some parts to arrive and then i will get back to you on how things work.

[8k3]

Originally Posted by Soorena

My engine is sleeved. Working on some parts to arrive and then i will get back to you on how things work.

Excellent, thanks. Please let us know, I'm very curious

[SVH]

Gintani selves their strokers. No problems that I'm awaire of.

[THE-FN-MAN]

Originally Posted by SVH

Gintani selves their strokers. No problems that I'm awaire of.

+1 I know of two out and about running right now

[8k3]

Yes I spoke to Alex briefly on this, he does have success but don't know the details and what the root of the problem is with most sleeve jobs

[BESTNDA416]

My motor is sleeved and I have put on 2700km on my break in so far on my ESS 650kit gonna be putting on my vt3 setup once I'm done my break in. Car has beeing running mint no issuse at all so far

[gobuffs]

what machine shops have done the sleeveing? I won't use VAC.

[8k3]

Originally Posted by gobuffs

what machine shops have done the sleeveing? I won't use VAC.

How come?

[PrimeBMW]

Originally Posted by gobuffs

what machine shops have done the sleeveing? I won't use VAC.

Um.....I see you have experience with them.

[Soorena]

I'm using Darton Sleeves flanged sleeves. So far i spent 4000€ on the block preparation (machining, honing, decking etc...) including the sleeve's price. Have in mind we have higher labor cost in here.