Who here knows old TRW piston stuff... - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech Who here knows old TRW piston stuff...

Print Thread

Who here knows old TRW piston stuff... #762909 08/01/10 02:55 PM 08/01/10 02:55 PM
Joined: Jan 2005 Posts: 3,643 Oakland, MI D dizuster OP master
dizuster OP master D Joined: Jan 2005 Posts: 3,643 Oakland, MI	As far as I know, any TRW piston part number (no matter how old), if it STARTS with an "L" that they are forged not cast. From what I know the actual first digit in the part number has NOTHING to do with forged or cast. Someone told me that if it's a "2" it's forged, but if it's a "3" it's cast... I don't believe that's true? Does anyone know for sure? I'm trying to ID a set of pistons but I can't guarantee they are what I need. Is it easy to tell if an OLD TRW is a forged or cast piston?

Re: Who here knows old TRW piston stuff... [Re: dizuster] #762910 08/01/10 03:04 PM 08/01/10 03:04 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	I know a L2316F is a forged 10.5 340 replacement piston... is the F for Forged? Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: Who here knows old TRW piston stuff... [Re: 70AARcuda] #762911 08/01/10 03:20 PM 08/01/10 03:20 PM
Joined: Aug 2009 Posts: 456 corpus christi tex C Cheatham mopar
Cheatham mopar C Joined: Aug 2009 Posts: 456 corpus christi tex	Quote: I know a L2316F is a forged 10.5 340 replacement piston... is the F for Forged? This is true as i had this piston at one time,semi domed flat top w/2 valve reliefs

Re: Who here knows old TRW piston stuff... [Re: dizuster] #762912 08/01/10 03:25 PM 08/01/10 03:25 PM
Joined: Dec 2008 Posts: 415 Peru cbarracuda mopar
cbarracuda mopar Joined: Dec 2008 Posts: 415 Peru	to recognize a forged piston just look in the back, if the aluminum is smooth it's forged. If it has graph it's cast

Re: Who here knows old TRW piston stuff... [Re: cbarracuda] #762913 08/01/10 03:38 PM 08/01/10 03:38 PM
Joined: Jan 2005 Posts: 3,643 Oakland, MI D dizuster OP master
dizuster OP master D Joined: Jan 2005 Posts: 3,643 Oakland, MI	I kind of figured that I could tell by the grained look of cast, vs. the smooth look of forged... From what I know "F" on the end of the part number means its a floating piston, and a "P" means press fit...

Re: Who here knows old TRW piston stuff... [Re: 70AARcuda] #762914 08/01/10 03:39 PM 08/01/10 03:39 PM
Joined: Jan 2005 Posts: 3,643 Oakland, MI D dizuster OP master
dizuster OP master D Joined: Jan 2005 Posts: 3,643 Oakland, MI	Quote: I know a L2316F is a forged 10.5 340 replacement piston... is the F for Forged? And that's the problem. Every forged piston I can find has both an "L" and a "2" I've yet to see a "L" and a "3" except for this set...

Re: Who here knows old TRW piston stuff... [Re: dizuster] #762915 08/01/10 10:20 PM 08/01/10 10:20 PM
Joined: Aug 2003 Posts: 44,235 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 44,235 Bend,OR USA	I have some old(pre 1990) TRW hi po catalogs, what piston number are you looking for information on? Maybe I can help Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Who here knows old TRW piston stuff... [Re: dizuster] #762916 08/01/10 10:46 PM 08/01/10 10:46 PM
Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida rickstershemi master
rickstershemi master Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida	Quote: As far as I know, any TRW piston part number (no matter how old), if it STARTS with an "L" that they are forged not cast. From what I know the actual first digit in the part number has NOTHING to do with forged or cast. Someone told me that if it's a "2" it's forged, but if it's a "3" it's cast... I don't believe that's true? Does anyone know for sure? I'm trying to ID a set of pistons but I can't guarantee they are what I need. Is it easy to tell if an OLD TRW is a forged or cast piston? I remember being told "that all TRW Part Numbers Starting with "H" are Hypereutectic pistons and Part Numbers Starting with "L" are Forged"... Rickster

Re: Who here knows old TRW piston stuff... [Re: Cab_Burge] #762917 08/02/10 12:35 PM 08/02/10 12:35 PM
Joined: Jan 2005 Posts: 3,643 Oakland, MI D dizuster OP master
dizuster OP master D Joined: Jan 2005 Posts: 3,643 Oakland, MI	Looking for L3017F-30

Re: Who here knows old TRW piston stuff... [Re: dizuster] #762918 08/02/10 02:13 PM 08/02/10 02:13 PM
Joined: Aug 2003 Posts: 44,235 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 44,235 Bend,OR USA	I looked in my old TRW catalog, no innformation on that part number, your pistons are to new My catalog is really old, I did try googling that part number and had no luck there either Sorry I couldn't help more. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Who here knows old TRW piston stuff... [Re: Cab_Burge] #762919 08/02/10 02:34 PM 08/02/10 02:34 PM
Joined: Jun 2009 Posts: 705 Michigan H Hemiroid super stock
Hemiroid super stock H Joined: Jun 2009 Posts: 705 Michigan	'73-'92 360 min. comp height 1.570 pin dia. .984 rings 5/64 5/64 3/16 MIN DISTANCE FROM TOP OF UPPER RING GROOVE TO TOP OF PISTON: .260 piston weight 564 Info out of the NHRA spec guide. Hope that helps.

Re: Who here knows old TRW piston stuff... [Re: Hemiroid] #762920 08/04/10 12:38 AM 08/04/10 12:38 AM
Joined: Dec 2003 Posts: 398 Ohio J jdfpam enthusiast
jdfpam enthusiast J Joined: Dec 2003 Posts: 398 Ohio	Doug, In 17 years in the engine business, I have never seen a TRW piston that starts with an L be anything but forged. Actually, I have not seen any cast TRW pistons. The only pistons that I know that starts with a L and are cast are EGGE Machine pistons. We use those in our old resto type engine builds. Don't have any info on that number, though. Take care, Jeff Day Precision Automotive Machine Canton, Ohio

Re: Who here knows old TRW piston stuff... [Re: dizuster] #762921 08/04/10 05:31 PM 08/04/10 05:31 PM
Joined: Jan 2003 Posts: 27,377 Rio Linda, CA John_Kunkel The Erection Connection
John_Kunkel The Erection Connection Joined: Jan 2003 Posts: 27,377 Rio Linda, CA	From the TRW spec catalog 6122783-TRW.jpg (1736 downloads)

Re: Who here knows old TRW piston stuff... [Re: John_Kunkel] #762922 08/05/10 11:41 AM 08/05/10 11:41 AM
Joined: Feb 2003 Posts: 885 south louisiana L lowell66dart super stock
lowell66dart super stock L Joined: Feb 2003 Posts: 885 south louisiana	Part numbers in the below charts with a H as the first digit are hypereutectic pistons, if the first digit is a L they are are forged pistons. Under Pin Type, P indicates the piston will work with a press pin type connecting rod, F means the piston will work with a floating pin connecting rod. If you see P or F it means the piston can be used with either type of connecting rod. FT under the top shape column means Flat Top piston, if it also has valve reliefs the number of reliefs will be listed also 2021 Dodge 2500 4WD Cummins 2020 Challenger R/T Scat Widebody 2007 Charger R/T 5.7

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1