Scott at Team Harco

The rings I got from Pelican have damaged at least one of my cylinder bores. Now I need to find a shop that can perform an overbore on my 3.0 l block.

Anyone with knowledge of a good shop that is capable of this? Preferably in southeast Michigan.

disasterman

Check with Stephen at Autocore in Waterford. He may have a source for you. (248) 722-1662. Crazy good experience with the 944 platform.

Van

Wisconsin isn't that far from Michigan... http://www.mt-llc.com/

mikehayes

I used "auto parts machine shop & services" in Ann Arbor to machine my flywheel. I haven't had any issues with it. I have a friend with a turbo who had them extract a bolt from his trans. That's the extent to which I've dealt with them though. Also; Van, I've seen your posts on here a bunch but never noticed you were from hyde park. I'm from Rhinebeck. Small world.

Scott at Team Harco

Thanks for the leads, guys.

Mike - APM is where I go for all of my work. I am not sure if Darrel has the equipment to deal with our "special" blocks. I should probably give them a call and verify. He did check everything over and cleaned up some minor flaws.

In the meantime, I have severely damaged at least bore #4 by installing some very questionable oil rings from Deves. I've never seen oil rings like these before and they were a total disaster. I also damaged the top of the bore on #2. This is going to be a very expensive lesson.

Van - the shop you mention looks to deal primarily in motorcycle engines. Do you have any experience with them? Do they work on car engines, as well? This may be an option if they can restore the bores and not require bigger pistons/rings.

D-man, thanks. Could be another good option.

V2Rocket

wrong direction and a little far maybe, but 928 motorsports can do Alusil in Horicon, WI

PorscheDoc

US Chrome in Wisconsin?

hacker-pschorr

If you are talking about Nikasil, Carl preps engines for the coating and takes them somewhere else. He doesn't apply it in-house, nor does he do machine work like boring.

I'm pretty sure that is where Carl & 928 Motorsports takes his engines.

Van

Cool stuff - let me know if you come back to visit - we'll get together for a beer.


No personal experience, but I did talk with them on the phone, and they've done several 944 and 928 blocks. However, they're not going to be able to restore it to the original bore size - they have to remove material to get to a virgin surface for plating.


Yes, that's my understanding, too.

Scott at Team Harco

Right. Would have been too much to expect.

V2Rocket

MY BAD...

hacker-pschorr

They did the coating in this engine:
https://rennlist.com/forums/928-foru...-a-veyron.html

Todd has never used them for just boring, but said he would trust them to do so.
However, the last time he talked to them (it's been a while) he thought they would only bore these blocks in preparation for plating. They may not have the equipment necessary for preparing an Alusil block after boring. So if you have she Sunnen equipment to do that yourself, good to go.

Another place in Green Bay that has been around a while:
http://www.barilengine.com/

I thought they had the necessary equipment for boring an alusil block and honing it correctly, don't quote me on that though.

Carl Fausett

The Nikasil plate we do is about .003" thick. That is; if the scoring in your cylinder walls is .003" deep or less, the Nikasil process will restore your bores to original dimension.

Usually, that is not the case, and usually, if the bore is scratched deep or gouged, the pistons are damaged too. So what we have done is we bore the block out .010" or .,020", Nikasil it, order customer forged pistons made (better than the stock cast pistons) and then do the final finish hone to match the new pistons. We provide new rings too that are compatible with the Nikasil.

You might find this page very informative:
https://928motorsports.com/services/uschrome.php

Scott at Team Harco

Thanks, Carl. That sounds like the answer. I couldn't get the link to work. I'll try tomorrow from work. I'll also try to take some photos of the disaster. There is no way the damage is less than 0.003"

Would you be willing to provide a rough estimate on the cost of the service you described (including the pistons and rings)? PM if you prefer.

Noahs944

Terribly sorry to hear this mate. It's a fear I have as well, to the point where I consider re-using rings on the alusil bores.

*can you guess or do you know what went wrong?*

Somewhere on the forums a couple years ago I read a "success" story of a 2.5 n/a owner boring only 1 cyl, 1 or 2 sizes larger with no noticeable effect on balance.