Cast 4 1/8 pistons?

38 coupe

38 coupe

Well-known member
While looking at my crankshafts I recently realized one of my 4" Merc cranks is offset ground with rod journals sized to standard prewar Ford. I concluded I have a 4 1/8 stroke crankshaft. I have rods and rod bearings for that setup, but not pistons. Looking around the internet all I find is forged pistons for that stroke, typically with a hefty oversize on the bore. Does anyone know where I can get reasonably priced cast pistons for 4 1/8 stroke, preferably with bore less than 0.125 over?


Thanks,
Fred
 
It's a long shot, but I got some discontinued oversize pistons cheap (closeout) from Speedway Motors several years ago. They weren't listed in their catalog or on-line, but they had 'em.

They seem to have been left with the "unusual" sizes.
 
38 coupe said:
While looking at my crankshafts I recently realized one of my 4" Merc cranks is offset ground with rod journals sized to standard prewar Ford. I concluded I have a 4 1/8 stroke crankshaft. I have rods and rod bearings for that setup, but not pistons. Looking around the internet all I find is forged pistons for that stroke, typically with a hefty oversize on the bore. Does anyone know where I can get reasonably priced cast pistons for 4 1/8 stroke, preferably with bore less than 0.125 over?


Thanks,
Fred
Click to expand...

Fred,

I'd give Egge a call. I believe they can do special order stuff. I doubt they stock a 4 1/8" stroke piston, but it shouldn't be hard for them to make one.

A custom sized set of Ross pistons cost me $675 without rings, so I'd assume Egge would cheaper.
 
When I got my 4 1/8" pistons from Egge, they were a common in stock item. That was about 10 years ago though.
 
Egge still lists them in the current offerings, but smallest oversize is .125" as Fred observed. But hey...may as well go for it. It'll probably out last us anyway! :D



Terry
 
I called all around looking for .080 pistons for 4 1/8 stroke and found nothing about a year ago. I didn't want forged, and I didn't want to bore the block again so it's all sitting on the shelf waiting.
 
I don't like to use Ross pistons in a street engine, but you don't have much choice now days. On my 296ci engine I foumd a set of steel strut piston 4 ring pistons at a flee market for 50 bucks. Fit the pistons with .0015/.002" clearance/ It was still running 10 years later when replaced with a 294 ci Blown engine.
I offered to refresh the original engime engine , but the owner said it didn't use a drop of oil, so now it's a spare. be nice if someone like EGGE would make oversize pistons in the strker version . But no market.
Gramps.
 
Egge should be able to supply the stroker pistons your looking for and as Tim wrote they will be a lot less money than forged. Custom sizing usually is not a problem for Egge.
Ronnieroadster
 
Having done business with Egge for over 30 years, they are not very helpful. I wanted ONE (!1) .020 3 5/6 x4 piston , but I had to buy 4. I asked why, and never got a straight answer so I bought 8 and all te cylinders. Now I have a set of 3 5/16 x 4 pistons for something I\ll probably never bui;d/
This is one of many good reasons I don't build enigmas anymore, and most shops are closed. Thise that are still in business, won't build a flathead, but TG they'l do mschine work, like boring millimg heads and valve jobs. But they'er not cheep
Gramps
Sorry about the spelling, can't see any more either.
G
 
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