Gotta love clean/new engines

[fast924S]

[Macfreak007]

OOOOOO AHHHHHH!

[livewirevoodoo]

what does something like that fetch on the street these days?

[fast924S]

couldnt tell yea, not my engine, it would depend on the work and products used

[Dougster]

Yep she sure is sweet!

[Zero10]

Which pistons are those? They don't look stock. Well, that or the picture in my head of stock pistons is wrong =)

[fast924S]

I think they are turbo pistons

[Zero10]

Well, I've never actually seen a set of turbo pistons, I thought they had the same crown design though. But it's quite possible that I'm wrong =)

[fast924S]

i could be wrong too, Im not sure what they are but with the deep dish in the middle of the piston I just guessed they where turbo pistons

[ae1969]

....aftermarket turbo pistons and wet sleeves.

Not cheap.

[fast924S]

How can you tell if those are sleeves??? Whats is a wet sleeve?? I NEED TO LEARN MORE

[cruzermusic]

throw away your mirror, you can shave looking at those things.

[ae1969]

Originally posted by fast924S
How can you tell if those are sleeves??? Whats is a wet sleeve?? I NEED TO LEARN MORE

Think of this way....... For a dry sleeve we would bore out the existing cylinder. So its a liner........ pressed in to the existing cylinder with an interference fit. So no coolant comes in contact with the sleeve (hence dry). One of the big challenges with these blocks when sleeving is the dissimilar metals with different expansion rates!

A wet sleeve on the other hand completely replaces the entire exisiting cylinder..... machined to fit. The entire new cylinder is surrounded by coolant. One of the dilemnas with the wet sleeve design is that the sleeve takes all the force! With an open deck design we have no support up top to begin with......... Not good.

One of the major problems with our blocks is the open deck design.... If someone made a closed deck design block for our cars it would be a dream!!!!

[Zero10]

How do you know they're sleeved? Is it because the cylinders are so close together?

[bluebullet]

possibly..but i have seen that on honda motors..they bore out the entire sleeve and press fit the new one in. Usually has a block gaurd built into the top of it so it sits down against the top of the motor, turning the open deck design into a closed deck.


Im sure someone out there makes sleeves that butt against each other and the block itself for the Porsche. How could a 951 run a stupid amount of boost with out cracking the wall?

[ae1969]

Thats exactly it Zero. Good eye. They are closer than the stock cylinders.

Blue ...

Unfortunately our market is behind the import/domestic crowd in regards to closed deck designs..... no such thing as modular integrated deck sleeves for these cars.

PD (performance developments) is making a deck plate for our blocks that runs approximately 1000 bucks...........OUCH.

I only know of one project that incorporated an integrated deck like you mention ..........and the idea was to siamese them together.

To accomodate the large sleeves.... the original block is overbored and you are left with a very small amount of material on the bottom 1/3 of the cylinder. The liner was supported on the head stud bosses to keep from moving side to side and an interference fit and with the head also providing some vertical clamping as well....

One of the problems is the bottom of the 944 blocks becomes PAPER thin to accomodate large sleeves! Unlike honda and ford blocks. The support can be made at the top but the bottom is relatively thin.