Reasonably priced forged piston (L82)
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Team Owner
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From: altered state
St. Jude Donor '05
Reasonably priced forged piston (L82)
Adopted a members L82 this week which I believe is a std bore (1973) havent verified
Would like to go through it and use a forged piston. and throw some compression at it.
Suggestions? Hear Probe isnt around anymore...and wont pay $700+ for a set.
Would like to go through it and use a forged piston. and throw some compression at it.
Suggestions? Hear Probe isnt around anymore...and wont pay $700+ for a set.
Le Mans Master
Joined: Sep 2001
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From: Unreconstructed, South Carolina
sp pn L2417 ...flattop with single notch-trough ... 1.565" ch
there was a guy on racing junk with 2 USED sets both +.030" ... $300 buys both sets
there was a guy on racing junk with 2 USED sets both +.030" ... $300 buys both sets
Last edited by jackson; Sep 21, 2019 at 05:18 PM.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
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From: Unreconstructed, South Carolina
Probe RIP
new L2417 are no longer in production but can be had
https://fme-cat.com/digipubZ/Speed-P...20digipubZ.pdf
Mahle also has nice forged 2618 & 4032 alloys ... many have prefered metric 1.5,1.5,3.0 ringpak (as found in iron vortec etc) ...
PBM has a house brand that are Mahle but without coating.
UEM aka Keith black also have a forged line "ICON"
There's a Major J.A.P. maker with plants in USA ... Nippon Piston Ring aka NPR ... they also have broad piston coverage but hard to source.
new L2417 are no longer in production but can be had
https://fme-cat.com/digipubZ/Speed-P...20digipubZ.pdf
Mahle also has nice forged 2618 & 4032 alloys ... many have prefered metric 1.5,1.5,3.0 ringpak (as found in iron vortec etc) ...
PBM has a house brand that are Mahle but without coating.
UEM aka Keith black also have a forged line "ICON"
There's a Major J.A.P. maker with plants in USA ... Nippon Piston Ring aka NPR ... they also have broad piston coverage but hard to source.
Last edited by jackson; Sep 21, 2019 at 05:46 PM.
Le Mans Master
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From: Unreconstructed, South Carolina
Burning Brakes
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Didn't L-82's have forged pistons from the factory? Been awhile..but I was thinking they did.
Depending on heads...we used to install 11.0 pistons in smog 350's when they were using OEM large chamber heads.
JIM
Depending on heads...we used to install 11.0 pistons in smog 350's when they were using OEM large chamber heads.
JIM
Last edited by 427Hotrod; Sep 21, 2019 at 11:30 PM.
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Le Mans Master
Joined: Sep 2001
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From: Unreconstructed, South Carolina
boat's domed L2304F should be a pretty good match w/ OE L82 heads ... sp cat says +.030" makes 9.31:1 CR w/76cc ... 1.560" ch , 2.4cc dome
Thread Starter
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From: altered state
St. Jude Donor '05
Thx guys head will probably be aftermarket alum 62-64cc prefer a dome
playing with the idea of mayyybe going low on compression and adding a st blower making this more driveable than the big head sr 383 thats in the car now.
That requires a decision (a good one) and Im not good at those lol
playing with the idea of mayyybe going low on compression and adding a st blower making this more driveable than the big head sr 383 thats in the car now.
That requires a decision (a good one) and Im not good at those lol
Last edited by cv67; Sep 22, 2019 at 09:04 AM.
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does it need a rebuild? if pistons and bores are good, those are forged and paid for. that oem head is 74cc's. aluminum name brand heads in 58 to 64 cc's will up the CR and increase power way more than domed pistons in the orig heads.
Thread Starter
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From: altered state
St. Jude Donor '05
Not sure...owner said he thought it may have had a head gasket issue but I believe its std bore just got it a few days ago
Wont be able to tear it down for a week or so. These blocks are impossible to find anymore so it would make a good back up in case.
May have something going on as my cooling system is getting pressurized, dont think its the heads. Hopefully I didnt split the block.
Wont be able to tear it down for a week or so. These blocks are impossible to find anymore so it would make a good back up in case.
May have something going on as my cooling system is getting pressurized, dont think its the heads. Hopefully I didnt split the block.
Last edited by cv67; Oct 6, 2019 at 12:39 PM.
Le Mans Master
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If you can save the bores and stock forged pistons this will be a breeze. Make sure the shop uses the hard stones to clean up the bores and make them straight. Then you can actually measure and see what you have. Dingle ball hones will make it rough but do nothing to straighten up the bore.
Le Mans Master
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pressurizing cooling system? head gaskets. blocks rarely crack in the bores. not until a valve head gets loose. and that is a whole nother issue. and on that note, what imported heads? they are notorious for using cheap valves, springs, etc. the castings aren't that bad. flow pretty good. few sealing issues. but throw out those valves and springs. ferrea or manley. comp cams springs and retainers are cheap and durable.
Dr. Detroit
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Thread Starter
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From: altered state
St. Jude Donor '05
Derek I upgraded all the parts and corrected a lot of flaws. They are pretty decent but wouldnt put them on top of a real expensive shortblock.
Couldnt bring myself to put a stock engine back in this thing.
Couldnt bring myself to put a stock engine back in this thing.
Last edited by cv67; Sep 22, 2019 at 04:35 PM.