The Stovebolt Site Forums The Shop Area Engine Shop 292 Rebuild using LP Engine from Massey Ferguson Combine

I have three 292 engines to pick from to build my mostly stock 292 engine. I have read the post about using the LP pistons for higher compression. Want all the engines be the same as far as bore and stroke is concerned? What about the LP head? Will it be different? Which head should I use? Should I use the LP engine totally. Any advice would be helpful.

The LPG piston will get you about 9.0 compression, they are still available from Federal Mogul. Depending on the year of your 292s the LP head may different because it might have hardened valve seats for LP use. Find the casting number on your blocks this will tell you several things, what crank you have forged or cast. The bore and stroke will be the same on all of them. There are other pistons with the same bore The problem is not the same wrist pin diameter and compression height. The only other stock head you could possibly use is the 194, which would bump your compression up to 9.5-10.0. What do you intend to use the engine for?

Larry

Hey Mule 1951, I am going to order the 292 with the LPG pistons this week from Hiperformer, also known as S&S up in Spokane Washington with a 7/70 warranty. It brings the compression from 8.0-1 to 9.0 to 1 for better fuel economy and power. As far as I know of there is no difference other than the pistons on them. We ran a small fleet of rigs that were totally stock engines and were converted from gasoline to propane without touching the engine at all. They ran good but really needed the higher compression pistons to make them run even better and more efficiently. We lost about 1 mpg or so with propane. I had to fill my truck everyday when I got back for the next days run. The other thing that I am having done is balancing which with the 292 is a very good idea being its not a high revving engine but a torque motor. Keeps them together a long time. I am staying with the stock cam. Also they are going to do some porting and polishing which will allow more air and fuel in without going to larger valves or a bigger cam. I will also run headers into one 3" exhaust that I already have by Magnaflow. Quiet yet flows so very well. Lump porting may be an option later. Probably going to two single barrel carbs as I can hook up the two cables easier than a 4 bbl being I have a 700R4 trans and 4X4. You would probably like this set up very well. This is what I've decided to do without getting radical. It will run smooth. have plenty of power and get decent mileage. I hope this helps you out.