Last edited:
Info on old TRW domed pistons
- Thread starter gagembassett
- Start date
-
Dan the man
Well-Known Member
Both come up as attachment can't be found.
Yep. Can't delete a post and some other guy decided to be a know it all dick in my other thread so I deleted the pictures and scrapped the post because it's a lost cause coming on here for info on my w2 build LOL. Everyone has to deviate from the original topic of my threads and thinks only 408 stroker motors are feasible so I gave up
OldmanRick
Well-Known Member
Only thing i found was they are Mopar Performance forged P4007042 pistons, likely +.030. Mopar chat says they were rated 11.5 to 1. You might try and measure the pin height from the pin center to the edge of the circumference for height. Then add all that dome.
As i said in your other thread, i doubt they will work.
As i said in your other thread, i doubt they will work.
and I appreciate your info because it's actual info.
33IMP
Well-Known Member
I've got good info for old trw's, but I need the four digit trw number...... and my info is 250 miles away.
I know nothing about w2's either, but those look like they have a reverse dome on the valve relief side too. If the w2's are closed chamber, I bet they won't work. (They do have a bunch of dome!)
I know nothing about w2's either, but those look like they have a reverse dome on the valve relief side too. If the w2's are closed chamber, I bet they won't work. (They do have a bunch of dome!)
Last edited:
Jax340Dart
Well-Known Member
I think the old TRW pistons are L2322
From 1994 MP Catalog:
From 1992 price list:
From 1992 price list:
Locomotion
Well-Known Member
P4007042 are listed in old Mopar Performance catalogs as 360 - 11.5: compression ratio. For 4.030" bore (.030" Oversize) It's not noted, but it's for a stock 3.58" stroke. I don't have any anymore, but like actual TRW pistons, these are pretty heavy and will tax the block, crank & rods at very high rpm's. Modern, lighter forgings would be faster at any rpm.
lol S'cuder beat me to it while I was doing research.
lol S'cuder beat me to it while I was doing research.
33IMP
Well-Known Member
As little as .008 piston to wall? Yikes!
And racer net $640 almost 30 years ago?!? Were they nuts, or just gouging?
And racer net $640 almost 30 years ago?!? Were they nuts, or just gouging?
Many many years ago many of us got ripped off by Direct Connection on the P400 series pistons. They were advertised as 11.5 compression and the TRW’s were advertised 13 plus compression. Those of us, me included were street strip racers and paid the extra 200 plus dollars for lower compression. I ran 11.80 with them in my street strip 340 duster back around 1980 or a hair earlier. My buddy has bought several used sets over the years and lots of times both part numbers were in the group.
33IMP
Well-Known Member
Looking at the pics in the o.p's post, frankly those look a lot more like 12 1/2 to 1(or more) to me (especially with 360s stroke) than 11.5
I guess it depends on how far down the hole they are. My "11.5" (ha ha!) Big block Trw's are really 10.3-10.5 . Down the hole about .050 .
I think I sold over the counter TRW slugs in the 25-30 range back in the mid 80's. Everything in that catalog is high in relative price because it had a mopar number on it.
1WildRT
Well-Known Member
I paid $205 for a set of eight TRW L2355's in 1982... I know cause it took a full weeks paycheck....
Makes sense and brand Loyalty keep the Direct Connection parts counters open.
-
