AM Rings? - ZR-1 Net Registry Forums

LGAFF · 08-01-2011

I spoke to 2 other companies, they stated that they will not be an issue...

Wow this is a PITA

LGAFF · 08-01-2011

Good info, note one poster is a mech eng/engine builder....

http://www.hotrodders.com/forum/lt-5...ml#post1451599

tomtom72 · 08-02-2011

Soooo, one builder thinks that the extra clearance is from wear (on the piston)?

Also, one builder thinks that it's okay but he is speaking in terms of a "hard wall" and a "hard piston" ( aka forged piston?, but ours are cast ) vs a cast iron bore and a cast piston.

btw, thanks for the link Lee.

HAWAIIZR-1 · 08-02-2011

Lee,

I'm sure you'll get some good input from Jerry and maybe he is consulting with Graham Beham and I don't know if there is better information out there than what would come from him.

What I don't understand is why Total Seal did not just reproduce the specs from the stock rings if they are going to claim the application fitment. I felt the same way when I was going by FSM specs and their rings did not meet specs of GM/Lotus engineers.

LGAFF · 08-02-2011

My understanding(an I know "0" about piston ring manufacturing).....is that this is the widest ring that they can get, period.

Pistons can be shimmed to accept other rings with some minor piston mods, and probably cheaper than going 368.

08-01-2011	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: AM Rings? I spoke to 2 other companies, they stated that they will not be an issue... Wow this is a PITA __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

08-01-2011	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: AM Rings? Good info, note one poster is a mech eng/engine builder.... http://www.hotrodders.com/forum/lt-5...ml#post1451599 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

08-02-2011	#3
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: AM Rings? Soooo, one builder thinks that the extra clearance is from wear (on the piston)? Also, one builder thinks that it's okay but he is speaking in terms of a "hard wall" and a "hard piston" ( aka forged piston?, but ours are cast ) vs a cast iron bore and a cast piston. btw, thanks for the link Lee. __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

08-02-2011	#4
HAWAIIZR-1 Join Date: May 2010 Location: Japan Posts: 3,108	Re: AM Rings? Lee, I'm sure you'll get some good input from Jerry and maybe he is consulting with Graham Beham and I don't know if there is better information out there than what would come from him. What I don't understand is why Total Seal did not just reproduce the specs from the stock rings if they are going to claim the application fitment. I felt the same way when I was going by FSM specs and their rings did not meet specs of GM/Lotus engineers. __________________ Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048

08-02-2011	#5
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: AM Rings? My understanding(an I know "0" about piston ring manufacturing).....is that this is the widest ring that they can get, period. Pistons can be shimmed to accept other rings with some minor piston mods, and probably cheaper than going 368. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359