The Stovebolt Site Forums The Shop Area Engine Shop Direct replacement for the stock 292 piston

Does anyone know of any non-custom piston that has the same physical dimensions and wrist pin height as the stock Chevy 292 piston.

The only piston I have found so far that comes close to what you are asking are the Federal Mogul LPG pistons. The LPG pistons will get you 9.0:1 compression. I've gone thru the diametrical listing at Keith Blacks (Silvolite cast pistons) web site. Here's a link to the listing

http://kb-silvolite.com/spistons.php?action=diam

The problem is the compression hieght of 2.09 inches. Without going to a longer rod lenght (which doesn't seem to exist) there doesn't seem to be an alternative to forged pistons if you want 10.0:1 or better compression.

If you do find something please let me know.

Larry

Larry,

Thanks for that information. There are several listed on that page that come close, specifically the International Harvester 2.5L 4 cyl & 5L v8 applications. Compression height is almost .2 inch too high though. And any modifications to make them work, without expert knowledge, would be very risky and not worth saving a few bucks over buying professionally designed custom pistons.

I already have the LPG pistons (in fact I have 3 sets). But since they weigh as much as the stock pistons I was hoping to find a low cost, easy fit lightweight piston that would fit the same. But as I think more about it for the next build, since I'm going for naturally aspirated peak torque, I don't need to worry about turning lots of RPMs anyways.

-ftyler

You might want to look at the 3481hc used in the GM 366 BB truck motor. It looks to be lighter and the skirts are coated. The compression hieght is 2.1. The bore is 3.9375, so you would have to bore .0625 over. The pin is .9898 and the 292 is .9273, .0625 difference. I'll check with my machine shop before we order custom pistons. The compression hieght shouldn't be a problem. I know of one 250 that is high compression and has .0625 fly cut from the 307 pistons. My deck clearance is .062-.072, so I should only need to cut about .052 aprox.

Larry

ftyler, if you have 3 sets of LPG pistons, would you consider selling a set? I would like to raise the compression on my 292. Are they std. or oversize?