TRW L2080F piston info please?

[Gary Stavely]

Hi does anyone have any info on these pistons? I just picked up a set for my 383 with pins but just wondering about rings and the actual specs, if anyone could help me out tha would be awesome.
Thank you!

 

[1 Wild R/T]

Compression height on the piston is listed as 1.891".
Ring pack 5/64 in. x 5/64 in. x 3/16 in

 

[Gary Stavely]

Compression height on the piston is listed as 1.891".
Ring pack 5/64 in. x 5/64 in. x 3/16 in

Thanks by rights they should work well with my 915 heads.

 

[GTX JOHN]

Just check deck when you build it and use a gasket that
will give you at least 040 Clearance on the closed head.

 

[1 Wild R/T]

Just check deck when you build it and use a gasket that
will give you at least 040 Clearance on the closed head.

That piston will be .037 in the hole sooooo..................

 

[GTX JOHN]

Depends on if and how much the block has been decked.
I always advise checking it when assembling short block.
These are very old parts and often I do not know the
History!

 

[1 Wild R/T]

Depends on if and how much the block has been decked.
I always advise checking it when assembling short block.
These are very old parts and often I do not know the
History!

Oh I agree 100%, just a point of reference, there are taller pistons out there & it's already a challenge to build cylinder pressure in a 383 due to the short stroke...

 

[Gary Stavely]

Oh I agree 100%, just a point of reference, there are taller pistons out there & it's already a challenge to build cylinder pressure in a 383 due to the short stroke...

I may be wrong but I believe these could be the stock .030 TRW replacement pistons for the 66 -67 383 4 bbl engine 10:1 compression. Whether I will end up using them will depend on certian factors , I kinda bought the full nos set on a whim (just because I am like that) bur I do have another 383 and I do believe even if I don't use them they still have value... These are hard to come by and definitely can work very well with a little bit of machine work.

 

[1 Wild R/T]

If you do the math you'll find that 10-1 C/R rating is "optimistic"...

 

[Gary Stavely]

If you do the math you'll find that 10-1 C/R rating is "optimistic"...

Probably yup bur I think back in the day that's what I think the higher compression 4bbl was rated at, gonna look more into it after work but I think that is the stock compression height for those pistons in 67.

 

[1 Wild R/T]

Pretty sure your correct.... But Chrysler like all the manufacturers was a little loose with their math... You'll probably be around 9-1 which isn't bad... especially because there won't be any quench... Iron heads & no quench 9.3 is about the safe limit so you'll be close with a margin...