Technical anyone have an OLD TRW PISTON CATALOGUE ???

I have a NOS set of TRW Power Forged pistons that I need the specs for.

Studebaker V8 late 60's early 70's TRW # L2197

Thanks, Dave Perry OldSchool Restorations North Alabama USA

 

I’ve got this book, but I does not list your pistons. I’ve got an old trw racing catalog some where. In the process of cleaning my shop, if I find it will see if your pistons are in it, Bones

 

Oldschool, where are you located in North Bama???

 

I looked in my TRW [19 75] parts book, found L2195 [ford] and L2199 [chev]..Only Studebaker are L2100, L2163, L2164 for early 60's 6cyl..

 

Ok, I have old TRW hi perf. catalogs back to 71 but that number is an oem replacement number. I did however find that piston number in a very old TRW piston clearance chart. The info is as follows:
L2197, BORE 3.625, CAM J - Min skirt clearance@top .0015, - @ bottom.001. Min land clearance .026. at the time of production they were available to +.060 oversize. That is all I have, hope this helps.

 

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A clearance of .0015 sure doesn’t sound like much for a TRW forging. My 1983 catalog calls for anywhere from .0035 to .008 depending on the pistons, but granted they do not list the Stude forgings.
I have a question for Dave Perry, are your TRW’s flat top or dished? If dished they might have a 14 CC dish like the stock R-1 Avanti piston. I would expect the pistons to be slipper skirt and have 5/64, 5/64 and 3/16 ring grooves. The 3.625 that saltracer mentions is a .0625 over piston, the 289 Stude is 3.5625 stock.

 

TRW used to put an F at the end of the part number if they are forged... As in L2197F

You have photos of the top and bottom of yours?

Sent from my Moto G Play using The H.A.M.B. mobile app

 

That would be odd model year range, considering that Studebaker went under in 1966.

 

The "F" in a non 2000 series piston means that the wrist pin was "fitted". The 2000 series with an "F" defines "Power Forged".

- EM

 

Minor point of clarification, but the optional high performance R1, 2, 3 pistons were all flat tops. The stock 289"s all had dished pistons.

As mentioned, with that clearance, they'd have to be cast pistons, not forged.

FWIW, what screws up many catalog and internet searches is that Studebaker used Chevrolet 194", 230" and 283" engines in 1965-66. So if the pistons were 3.875" or an oversize thereof, they could be just 283"s.

jack vines

 

Well, I can tell you after over 40 years in the automotive machine and engine building business that TRW's O.E.M. replacement forged pistons were an entirely different animal than their HiPerf piston line. The O.E. forged versions used the same or very close to specs as the O.E. cast pistons. One of TRW's selling points was their stronger than cast but quiet pistons with tight O.E. bore clearances. If one insists on putting more clearance on these O.E. forged stock replacements, they will be noisey and it will shorten their life. As far as I know and according to the TRW spec manuals that I have all of the L2000 series pistons are forged. I can send you a copy of TRW's spec chart if you like.

 

anyone know what trw L2327 .060 pistons use for rings and what application

 

the 259 and the 289 carry the same bore. the piston difference pin height 1.6 for the 289 1.7 for the 259

 

According to the chart Early Mopar posted, the 2000 series can be forged or cast depending on suffix: