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+--- Thread: Need thinner than stock prechamber rings (/showthread.php?tid=2737)
Need thinner than stock prechamber rings - Biohazard - 06-21-2011
So I put the thicker headgasket in my 617 engine, but I can't find any prechamber sealing rings that are thinner than the stock 2.0mm. I would like to put in a thinner sealing ring to get the prechamber back to its stock hight in relation to the piston. I asked a company for a quote to make a thinner sealing ring, and they wanted $20/each!! That seems a bit on the steep side for a sealing ring. Does anyone know where to get a thinner ring, or have the ability to machine a set to about 1.15mm thick? They seem to be really soft aluminum.
Thanks in advance!
RE: Need thinner than stock prechamber rings - 98taco3 - 06-23-2011
possibly get ahold of a set of mics and hand sand/lapp them to the correct thickness? alot of work but cheap...
RE: Need thinner than stock prechamber rings - 300D50 - 06-23-2011
Mail me one, I'll see what I can do. No promises it'll be done this year though...
RE: Need thinner than stock prechamber rings - Biohazard - 06-23-2011
(06-23-2011, 03:14 AM)98taco3 possibly get ahold of a set of mics and hand sand/lapp them to the correct thickness? alot of work but cheap...
Thought about doing that, but I am pretty sure they would get distorted and or uneven during the process. I have an old one laying around, it is really easy to bend it by hand. Plus, like you said, a lot of work. LOL
Thanks for the offer 300D50, but I think I'm just going to bite the bullet and send off for the custom ones. I cant think of any better ideas for making stock ones the needed thickness without messing them up. Should have them in about a month or so.
RE: Need thinner than stock prechamber rings - 300D50 - 06-23-2011
Oh, I was going to do a short run of them, using one to get measurements.
RE: Need thinner than stock prechamber rings - Biohazard - 06-23-2011
(06-23-2011, 08:58 AM)300D50 Oh, I was going to do a short run of them, using one to get measurements.
Ok, PM me your address, I'll send you one.
RE: Need thinner than stock prechamber rings - Biohazard - 06-23-2011
I'll be shipping you out a sealing ring tomorrow at the latest. Thanks again!
RE: Need thinner than stock prechamber rings - 300D50 - 06-23-2011
No problem, how's 1/5th their price sound?
I'm flexible though, I might be wooed into doing it for random parts, a kudos, or just because, haha.
RE: Need thinner than stock prechamber rings - Biohazard - 06-24-2011
Holy crap that sounds awesome!! Let me know what random parts you might be looking for too! I'll probably need a total of 10 of these; 5 for my car, 5 more for what ever car I put my other copper headgasket on.
RE: Need thinner than stock prechamber rings - Captain America - 06-24-2011
Look at this guy! I mean between 300D50 and Delivery Valve .... Awesome!
RE: Need thinner than stock prechamber rings - 300D50 - 07-13-2011
Doing the production run.
RE: Need thinner than stock prechamber rings - Biohazard - 07-13-2011
If anyone else is doing a thicker head gasket, please post in here asap so we can figure out how many of these to make. Thanks again 300D50!!
RE: Need thinner than stock prechamber rings - 300D50 - 07-14-2011
These were from yesterday, but the network was being flaky so I couldn't access my gallery...
![[Image: IMG_20110713_153553.jpg]](http://zarnochwf1.com/gallery2/v/Prototypes/IMG_20110713_153553.jpg.html)
Two sets of 1.15's, and the original out towards the right
![[Image: IMG_20110713_153818.jpg]](http://zarnochwf1.com/gallery2/v/Prototypes/IMG_20110713_153818.jpg.html)
The blue is a windows 7 login screen (no, it's not my personal machine... I run Debian...)
The 1.25's will be getting finished today if all goes well.
This car-porn break brought to you by, machines! They do the work so you don't have to!
![[Image: icon_lol.gif]](http://www.rc10talk.com/images/smilies/icon_lol.gif){kind=icon}
RE: Need thinner than stock prechamber rings - Biohazard - 07-14-2011
Those are sexy! You know, in a car-porn sort of way.
RE: Need thinner than stock prechamber rings - 300D50 - 07-14-2011
I've got 30 1.15mm and 30 1.25mm in stock as of now.
RE: Need thinner than stock prechamber rings - Biohazard - 07-14-2011
(07-14-2011, 04:21 PM)300D50 I've got 30 1.15mm and 30 1.25mm in stock as of now.
Sweet! In case anybody wants to go with the thicker headgasket through Cometic, the numbers on the package they sent it in are: H311309c with description 208087. It is a .094 thickness gasket.
RE: Need thinner than stock prechamber rings - winmutt - 07-18-2011
Erf. Those are crush rings. Your solid rings will not seal as well I do not think.
RE: Need thinner than stock prechamber rings - 300D50 - 07-18-2011
I'll be honest, I'm a little worried about that as well.
Biohazard and I decided to try it anyways, and hope the surfaces involved are parallel enough to work.
The idea is to torque them in stages, up to the FSM's specified value.
RE: Need thinner than stock prechamber rings - Biohazard - 07-18-2011
Yeah, much like the thicker headgasket, I'm ok with being the guinea pig. I've got the special tool for the prechamber collar being shipped; this will help with getting the torque correct.
RE: Need thinner than stock prechamber rings - Hercules - 07-19-2011
Never had a problem re-using old rings,just apply small amount of sealer.So don"t see problem using solid ring! No leaks!
RE: Need thinner than stock prechamber rings - Biohazard - 07-19-2011
Again, you've come through with a great tip. Thanks!! Waiting for multiple packages now...
RE: Need thinner than stock prechamber rings - Biohazard - 07-22-2011
Got two packages here now! One box of sealing ring goodies and one box with the lock collar tool!! Woot! I know what I'm doing Sat after work!!
Hercules, what type of sealer did you use? I have some of the spray copper sealer I used with my copper headgasket, think that would do the trick?
RE: Need thinner than stock prechamber rings - 300D50 - 07-22-2011
The ones with 2 sharpie marks are thicker IIIRC.
Sorry about the burrs on the ID...
RE: Need thinner than stock prechamber rings - Biohazard - 07-22-2011
I can get the burrs off. No problems there.
I've got a caliper, I can check the thickness to make sure too.
RE: Need thinner than stock prechamber rings - winmutt - 07-22-2011
I do rent the lock ring tool.
RE: Need thinner than stock prechamber rings - Biohazard - 07-22-2011
^^^ I had forgotten about that. But, I also have 3 and a halfish MB diesels in the family, so having my own is good. Plus, I'm a tool whore.
RE: Need thinner than stock prechamber rings - Hercules - 07-22-2011
(07-22-2011, 09:15 AM)Biohazard Got two packages here now! One box of sealing ring goodies and one box with the lock collar tool!! Woot! I know what I'm doing Sat after work!!
Hercules, what type of sealer did you use? I have some of the spray copper sealer I used with my copper headgasket, think that would do the trick?
If that copper sealer works good for the head gasket should be ok .I used high temp. silicone . Is the prechambers going be be drilled at exit holes,at least to 85 specs.Sure worked well for me. Prechambers, not hard to drill ,did by hand.
RE: Need thinner than stock prechamber rings - Biohazard - 07-22-2011
Doing the tapered entrance to the PC holes. I have a spare from a parts engine I practiced on the other day. Really easy to cut with a carbide bit and some cutting oil.
RE: Need thinner than stock prechamber rings - Biohazard - 07-25-2011
Didn't have a chance to work on this on Saturday. Just about finished the adapter to pull the prechambers tonight though. Need to make one more groove for clearance and then it should be ready.