• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Piston ring question for 1327 Wiseco pistons

  • Thread starter Thread starter Flo
  • Start date Start date
F

Flo

Guest
Hi,

I got an old Orient Express block here honed already with 80mm Wiseco (I believe) pistons. That stuff is at least 10 years old, but was never used.

Two questions:
-I do not know which of the rings is supposed to be top, which second ring. Both have same dimensions and a top-marking. One has more open ring gap (so more tension I guess) and is black (cast I guess) opposite to the other one looking like chrome. Which one should be top?

-What ring gap should I aim for? They measure around 0.25mm (about .01"). Is that enough? Should I file them? I do not have a ring grinder, so I would liek to avoid that?

Looking for real world info. Maybe someone from APE jumping in?

Best regards
Flo
 
Last edited:
Just make sure the ring end gaps are within the specs listed for YOUR usage. If you need to increase the ring end gaps, take the block, rings, & 1 piston to an automotive machine shop that does RACING engines & they will be able to help you. Or you could buy a ring end gap ginder from Jegs, Summit, or APE. Ray.
 
thanks for the answers!
I do not have any docs what piston ring gap I should run. According to that chart from Wisecos page it would be more like .36mm for the top ring.
Sent an email to APE and they said my .25mm is minimum but will work.
I will just leave it alone and install it.

Maybe sounds weird but there are pretty much no machine shops around here (Germany) who do race engines of any kind. Appreciate everyone's help.

Flo
 
If you click on the Wiseco ring link above it tells you .005 per inch of bore for the top ring & .0055 per inch of bore for the second ring. Your bore is 3.110 so multiply that by .005 & you get .0155 ring end gap for the TOP ring. Multiply 3.110 by .0055 & you get .017 gap for the second ring. Ray.
 
@Ray: you mention exactly the chart I was referring to first, which translates to the mm-numbers (.36mm) I mentioned. That is why I asked in the first place, hope someone had some experience with this. APE said the .25mm I got are OK...

I never filed a piston ring before, did not want to screw up anything... this file-to-fit-approach just sounded weird to me.
Already have the block on with copper gasket and silicon... I guess I am just going to assemble and fire it up spring and see next what is going to happen..
 
OK, but if you pinch the rings because you don't have enough end gap it will DESTROY your cylinders & pistons & you'll have to go to next size overbore! It's much cheaper to buy a couple of gaskets & do it now. Ray.
 
Ray;
Wiseco rings have a lot of gap, that is why they state those figures. .003" per inch of bore has always worked without any ring butting. Ask Byron if he would run .017 on an 80 mm bore.

Jay
 
Jay, have you looked at the Wiseco ring gap chart listed above? It shows the MINIMUM gap at .005 on the top ring & .0055 on the second ring for a street motor. I, also, used to go by the 3 thousandths per inch rule but the new stuff has different expansion rates. Ask Snake next time you talk to him. Ray.
 
Hi Ray,
I may have forgotten to write that, but these parts are at least ten years old, if not older. they were never used, but they are not new.
Thanks to all involved, I got just the real-world-info here which I was looking for!
Flo
 
Last edited:
You must log in or register to reply here.
Back
Top