You're a life saver Ray
same pistons i have in my liberty except i have the dome milled off.
0-decked block and d3 heads 10.5 to1
Well ok not a life saver but you guys have been a god send when I got in trouble.
I'm the only jet boater in the area, unless you count those lake lice.
With out your help I would really have struggled.
Thank you all!
I think you want the "N" facing north when you install them.... ::)
That's kinda why I questioned the N. Mine had no letter at all that I recall. Not gonna pull the heads to find out either, lol. Could just be the die number used to forge them?? damifiknow.Lettering at the end of the part numer.
An F at the rear means they're Omars' pistons.
Ray
I picked up a short block today with about 200 miles on it. ;D The pistons, bores etc look like new and it's balanced ;D. My question is what are the specs on these old slugs?TRW got out of the piston biz in 1996. They sold the tooling to Federal Mogul, who now offers the TRW line under their Speed-Pro piston line. So today, these TRW L2443 pistons are sold as Speed Pro L2443 pistons.
The guy said they should give me 10:5 CR with my Edelbrock 95CC heads.
They should be from around 1996.
Any help on the info will be greatly appreciated.
.... I dunno what the 'N" means...The "N" in these pistons means that the crown is Not flat. Hence, L2443NF-030
.... (Started out running only 93 octane, but 91 seems ok, no detonation as yet).Are you sure??? Be sure to do spark plug readings and jet on the rich side; these pistons promote inaudible detonation in the 460 due to their peaked dome-top design. Further, the intake valve relief is cause for the ring land to get really thin near the top ring, thereby creating a hot spot....and so this is where the L2443's melt first:
I really think though with 95cc heads your much closer to 10:1 or less...Think again.... ;)
Do you know if the rings the standard size (width) for the ford pistons? With TRW out of businessThey use a standard 5/64" ring package. I recommend the Speed Pro plasma-moly ring set.
I'd hate to try to find a set of their rings.
The seller told me he had about 13:1 CR with his cobra jet heads? Do you know what CC dome they have?13.25:1 is about right, zero deck the block and you get 13.5:1 nwth D0OE-R SCJ heads. The dome on your 1996 pistons is advertised at 12.1 cc's.
same pistons i have in my liberty except i have the dome milled off.Ralph either we had a mis-communication or I had a brain fart; your shortblock is 9.65:1 with D3Ve's or 11.6:1 with early-style heads.
0-decked block and d3 heads 10.5 to1
Ralph either we had a mis-communication or I had a brain fart; your shortblock is 9.65:1 with D3Ve's or 11.6:1 with early-style heads.my heads are milled
How much do you think would need to be milled off the dome to land 10:5 CR?Assuming a true 95 cc combustion chamber volume, your particular pistons set 0.005" below deck at TDC, a Fel-Pro 1018 head gasket: mill the dome down until you have about 0.100" of dome pleateau remaining. That should be approximately 10.5:1 c/r. You should also understand that at 10.5: 1 c/r, your quench distance plays a far more important role in minimizing detonation than does the c/r itself.
The pistons came in and we're getting the final parts needed for the build. The pistons came
with NO info on ring gap etc? What final bore clearance should we shoot for and what ring gap?
What ever happened to "this is what we made and this is best how to set it up"?
The un-coated piston on the left is an original TRW-style piston. It has square cut pin clips and is made from a different slug forging and a better material than the one on the right.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi45.photobucket.com%2Falbums%2Ff77%2Fdano670%2Fstuff135.jpg&hash=9d6674402f561021dc15b994ce834f42fbaac5e9)
Well after close examination, unless you want to remove material from the skirt of the TRWs, I don't think mixing them is a good idea.Depending on application, the two pistons shown in your picture can be made to be used together in a set of eight. It is not ideal but it is possible...depends on the rest of your build. Also, it may be possible to find the correct pistons that you need in order to complete a full set of 8 that are all the same piston revision.
Weight of TRWs is 927 grams to the Federal Mogul's 911
I ended up with a set of these pistons, but there is combination of the old TRW (7) and 1 of the Federal Mogul. Does anyone know if you can combine sets of these?Either find an eighth TRW version, or weight match within reason. How much HP are you targeting?
The TRW are labeled L2443 .030 and the Federal Mogul are L2443NF .030.
New to the forums, rather than post a whole new thread, this one was the first to come up.
I ended up with a set of these pistons, but there is combination of the old TRW (7) and 1 of the Federal Mogul. Does anyone know if you can combine sets of these?
The TRW are labeled L2443 .030 and the Federal Mogul are L2443NF .030.