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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,110
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Gas holes tops of pistons
Windsor 302
Nephew already bought pistons for his wana be lil cruiser car (1962 Comet ) KOOL ! He has most the stuff to make it a real fun engine for . Cam, manifold , .011 decked block, 60 CC AL heads with 202 valves and all. SO I was trying hard to adjust the drag of oil rings on these so called "performance pistons". Come to find out after much frustration they are just hyper pistons with a moly skirt. They fit nice- BUT he has standard go to twn Aunt Tilly grocery getter rings ! ![]() OK, cant send pistons back. Cant allow 40 pound drag rings in there either! Is it a BIG trick to drill tops for gas operated low drag piston rings ? This does not look like a magic trick. OR should i just send them out, to where, for some holes ? Your opinion? thanx
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between Last edited by afterburn 549; 07-14-2015 at 06:36 AM.. |
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Registered
Join Date: Oct 2003
Location: London Ont Canada
Posts: 3,120
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What hp @ what RPMs is he expecting to turn? I use standard rings ,moly faced top one in a 347 , stroked 302 Windsor, which dynoed @ 468 hp @6400 flywheel. I regularly wind it to 6800 and don,t think I left much on the table (KB icon forged pistons ,AFR heads ,Anderson N-71 cam ).
Your standard cast rings will have less friction after they break in.
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1980 911 SC 3.6 coupe sold 1995 993 coupe 1966 Mustang Shelby clone 1964 Corvair Spyder Turbo gone 2012 Boss 302 |
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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The benefit largely depends on: ring land / location, ring thickness, and max RPM. The problem with running that even in limited street use is carbon build up plugging the tiny holes..............................all based on my experience.
I would consult the piston manufacturer as to what they recommend. Hopefully you'll get a knowledgeable guy on the other end of the phone.
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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Model Citizen
Join Date: May 2007
Location: The Voodoo Lounge
Posts: 18,992
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,110
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Can or would someone point me to a part number or place that will sell a med drag ring?
* The rings he has now takes a freight train to move the piston with JUST the oil rings in there. I did not even measure it as its just TOOOOoo much Thanx Next - He is hoping for 400 HP at around 5500 its not a real race car, i call it a Ricky race car. More of a ego trip....But then i think it all is anyway. Asphault, - thanx for the tip and thanx johnsjmc. Goood job on HP ! looks usuable This car is just a hamburger dan car Sat night Special
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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