Login    Forum    Search    FAQ

Board index » Racing Forum » Engine & Cylinder Head Tech




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post Posted: Tue Feb 15, 2011 9:00 pm 
Offline
Site Admin
User avatar

Joined: Tue Apr 18, 2006 6:38 am
Posts: 11804
Location: Coming At Ya!
Need to know how deep an .043 ring land is. I've measured the .062s on my J&Es for my engine but need a dimension for an .043?? :-k

_________________
Big Boyz Toyz!

Image

Necessity is the plea for every infringement of human freedom. It is the argument of tyrants; it is the creed of slaves.

William Pitt, British Prime-Minister (1759-1806)


Top 
 Profile  
 
 Post Posted: Wed Feb 16, 2011 2:02 pm 
Offline

Joined: Sat Jan 08, 2011 10:21 am
Posts: 10
Location: McAllen, Tx
Most piston mfg cut the ring groove .170" radial depth.


Top 
 Profile  
 
 Post Posted: Wed Feb 16, 2011 3:38 pm 
Offline
Site Admin
User avatar

Joined: Tue Apr 18, 2006 6:38 am
Posts: 11804
Location: Coming At Ya!
Thanks! ;-)

_________________
Big Boyz Toyz!

Image

Necessity is the plea for every infringement of human freedom. It is the argument of tyrants; it is the creed of slaves.

William Pitt, British Prime-Minister (1759-1806)


Top 
 Profile  
 
 Post Posted: Wed Feb 16, 2011 7:00 pm 
Offline
Moderator
User avatar

Joined: Tue Apr 18, 2006 3:20 pm
Posts: 1457
Location: Missouri
I checked a .043" piston. The ring measured 0.160" and I was surprised to find the groove was much deeper at ~ 3/16" (with ruler) or 0.187". O:) ... They were from a long time ago, but I thought I bought the rings with the pistons from Ross. That's a LOT of back clearance. The 1/16" ring pistons from the 383 engine I'm working on measure .185" and the groove measured the same depth as the .043" piston. With the ring all the way into the groove I can barely feel an edge with my fingernail from the ring to the piston (the ring pushes in slightly deeper than the edge of the piston). That is how I would want the back clearance.

The .170" that jdeleon mentioned would be about right for the rings I have.

Rick


Top 
 Profile  
 
 Post Posted: Wed Feb 16, 2011 7:53 pm 
Offline
Site Admin
User avatar

Joined: Tue Apr 18, 2006 6:38 am
Posts: 11804
Location: Coming At Ya!
My J&E .062 ring groove is .200 deep? The used top ring I have out is .185/.186 and a new top ring is .188 = .012 clearance. Called Kowalsky after I posted this and got some real funky numbers? I think it's some propriety stuff he does to those late model engines he builds. :-k

_________________
Big Boyz Toyz!

Image

Necessity is the plea for every infringement of human freedom. It is the argument of tyrants; it is the creed of slaves.

William Pitt, British Prime-Minister (1759-1806)


Top 
 Profile  
 
 Post Posted: Wed Feb 16, 2011 8:30 pm 
Offline

Joined: Sat Jan 08, 2011 10:21 am
Posts: 10
Location: McAllen, Tx
FYI
The .170" radial depth is what is commonly used today in racing and many pro series piston and ring pkgs. The SAE specs that were the standard for ring thickness for many years is :
Radial thickness= bore"/ 22
It was not uncommon to use backcut rings in std grooves.


Top 
 Profile  
 
 Post Posted: Thu Feb 24, 2011 8:33 am 
Offline
User avatar

Joined: Sat Oct 21, 2006 11:41 pm
Posts: 768
Location: Morrison, Co
Not sure if it will help much Ken, but I can measure the lands in my JE's. I'm running 1/16" rings though...........

_________________
Mark Goulette
Owner/driver, Livin' the Dream Racing Dragster
Speed Kills, But It's Better Than Going Slow!!!
http://www.livinthedreamracing.com


Top 
 Profile  
 
 Post Posted: Thu Feb 24, 2011 8:47 am 
Offline
Site Admin
User avatar

Joined: Tue Apr 18, 2006 6:38 am
Posts: 11804
Location: Coming At Ya!
Never mind Mark. I already finished it. ;-)

_________________
Big Boyz Toyz!

Image

Necessity is the plea for every infringement of human freedom. It is the argument of tyrants; it is the creed of slaves.

William Pitt, British Prime-Minister (1759-1806)


Top 
 Profile  
 
 Post Posted: Thu Feb 24, 2011 9:01 pm 
Offline

Joined: Tue Feb 05, 2008 6:45 pm
Posts: 248
How did gas porting you pistons turn out anyway Ken? How many did you go with,...distances between them?

Don

_________________
GOODSON Tools & Supplies For Engine Builders


Top 
 Profile  
 
Display posts from previous:  Sort by  
 
Post new topic Reply to topic  [ 9 posts ] 

Board index » Racing Forum » Engine & Cylinder Head Tech


Who is online

Users browsing this forum: Bing [Bot] and 1 guest

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron