Dartsun
Mopar Dude
Well that's a damn shame was a commando engine that got rebuilt to a 2 barrel one. Lame. Doh
least I got a good deal on it
How rare are 273 Commando factory pistons .030 over ?
- Thread starter Kemper
- Start date
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least I got a good deal on it
That is but still a fun runner. Pistons, a little bigger cam and bolt on's make it a Charger 273. (if it's a Dodge of course)Well that's a damn shame was a commando engine that got rebuilt to a 2 barrel one. Lame. Doh
Dartsun
Mopar Dude
Yep it's a Dodge, super let down tho. My dumbass thought it had the sweet pistons in whole time. I only popped the heads off because they were leaking. But makes since the engine doesn't feel any quicker than my original 2 barrel with a 4 barrel intake.
Well, you DO know that any of the major players will whittle you out whatever you want. Ross, Manley, Mahle, Icon and more. Just a phone call away. But get the checkbook out. lol
jeff alder
Well-Known Member
True enough Rusty. I think JD MOPAR had a source for his 273 build. Maybe Race Tech that were slightly over Egge cast price. Now that we finally found the intake (3 year search). We are building this little guy with parts we have from the good old days, what member's here have helped with, but the pistons have to be store bought. If TRW is not offering forged in the new catalog it's time to ask JD!
I went out to the shop and I would have to move some stuff to get to then at the moment. I thought someone here might know or have a pic of original 273 pistons .030 from the facory or as a dealer available option when doing a rebuild .
I realize most of the stuff you guys are saying but want some more specific info if anyone has some. I know back in the day the factory would change the specs on a crank to different main and/or rod bearings rather than disposal and this would be stamped on the block denoting which were changed. I don't know if they would change the cylinder bore and put in .030 pistons or not if there was a need to.
I realize most of the stuff you guys are saying but want some more specific info if anyone has some. I know back in the day the factory would change the specs on a crank to different main and/or rod bearings rather than disposal and this would be stamped on the block denoting which were changed. I don't know if they would change the cylinder bore and put in .030 pistons or not if there was a need to.
jeff alder
Well-Known Member
It was Ma Mopar. It could be a Monday or Friday engine.
jeff alder
Well-Known Member
Not that I ever heard of
Mopar would bore blocks .020 from the factory. But they stamped the block with a large A for 20 over
They did sell .030 oversized pistons. But not in a new engine
Tommy
I found this on this site and I believe those are the same numbers on mine.
[SOLD] - 273 High Performance .030 pistons used
As someone here said and the poster of this pic says, they were TRW pistons and I believe that is what Chrysler used.
I'm still not sure that they didn't use these .030 over on the assembly line if needed .
[SOLD] - 273 High Performance .030 pistons used
As someone here said and the poster of this pic says, they were TRW pistons and I believe that is what Chrysler used.
I'm still not sure that they didn't use these .030 over on the assembly line if needed .
Cool. If it's someone with the pattern already on file, the price might not be so terrible.
Spent 12 hour shifts feeding CNC turning, aluminum slugs for refrigeration compressors. On size. Push a button to get .01 over,.02 over, . 03 over. .03 doesn't go in new. Not one rebuild possible. Get some pizzed customers.
Plymouth 65
I'll be in the shop
When I purchased my replacement 273 Commando pistons in the early 80's they were manufactured by TRW. 65
I bought a used .030 over set for $50(plus ride). They dont come around much, but like said new are available, but PRICEY.
I had machine shop give them a once over and they're good to go if I rebuild the 273.
I had machine shop give them a once over and they're good to go if I rebuild the 273.
I don't think those are the L2222N that Chrysler used in production.
Im not sure, they are at machine shop. Not to nitpick, but I dont think .030 over would be considered "in production". That term to me means assembly line, which wouldn't be the case in an engine designated for a new car?? I could be wrong? Definitely available as a true OEM over the counter factory replacement.
Yeah, the .030 may not have been used in production , I don't know . The only pistons like these that I've seen are either the standard Commando pistons or ones that are .030 over. Someone said they had a set of these and that they were .040 over but I haven't seen them so I'm not sure of that.
jeff alder
Well-Known Member
That's an oldie
jeff alder
Well-Known Member
There was some toolmanmike and a RUSTYRATROD in it!
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Yes, that's them. You really should familiarize yourself with what you're talking about. Here they are from Egge all the way from standard size to .060. You have some very experienced people trying to help you here. You should listen.
Egge Piston Set with Pins - Egge Machine
1964-67 Dodge/Plymouth 273CID 4 Barrel Carburetor, 8 Cylinder Piston Set
egge.com
I'll never say never, but I've not seen an engine that was factory original with over sized pistons. Now crank bearings are a different story. Still though, just because "I" have not seen it doesn't mean it did not happen.
Charrlie_S
Well-Known Member
I did not read the complete thread.
The original 273 pistons (both std, and Hi-po) were cast, and only available in Std, .005, .020 and .040 over size, not .030
The 2 bbl pistons were the same for all cyls. The 4 bbl pistons were different between the odd number cyls, and the even number cyls
"Back in the day", TRW had forged replacement pistons available in several over sizes, including .030.
If needed, I can supply the OEM part numbers, and possibly the TRW part numbers
The original 273 pistons (both std, and Hi-po) were cast, and only available in Std, .005, .020 and .040 over size, not .030
The 2 bbl pistons were the same for all cyls. The 4 bbl pistons were different between the odd number cyls, and the even number cyls
"Back in the day", TRW had forged replacement pistons available in several over sizes, including .030.
If needed, I can supply the OEM part numbers, and possibly the TRW part numbers
No, those are not the same. Those are not marked L2222N . They are listed as L2222 without the N . They may be the same specs but the marking is different and visually they appear different on the top.
Also, jeff alder may or may not have misspoken when he said he had some of the ones I'm talking about marked .040. I'm not calling him a liar , I just have never seen or seen a picture of the Commando pistons that Chrysler used or sold through their dealerships that were anything but standard or marked .030.
I'm thinking there were only 2 options on the Chrysler furnished pistons I'm talking about and those 2 options were either standard or .030.
I'm not the one having trouble keeping up with what this thread is about. If anyone has a pic of the pistons I'm talking about marked differently please share. That is the help I'm looking for , not alternative options.
Ok. I'm done with this nonsense.
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