265 Chrysler

What can be done to get mid range power out of a 265 Chrysler engine for pulling?
Thanks in advance.

Dont mill the head. A cam will help, we got one bout 320ci with a stroker, 2nd gear 4500lbs 4mph. Does well, good power, rev it up and it has real good power. Keep the stock 101 carb on it if its an updraft. Dont care if its off the small chrysler or off the continental in the 101SR, those carbs work well on em.

Can you bore them? Never been in a 265, do they have sleeves.

Sleeveless, .060 is max. It gets thin between the cyls, much over .060 without relocating the cyls over, you will go thru about .100 overbore inbeween the cyls. ours is a .030 with IH 153 rods, offset/welded stroked to bring it up to the top. Hope this helps.

Thanks, Massey 101> Been playing around with the F-226! C-153 came in the 340 IH tractors?

Believe I have 6 used .060 aluminum pistons that I could let you have for $60.00 plus shipping. I have no rings.

About 20 plus years ago I was building a Love tractor with the 265. I did a lot of research on hopping these motors up. They talked about relieving the block. I believe this is where you take material out of the block between the valve seats and the cylinders. Basically ramp the fuel in to the cylinders. The exact dimensions of the ramp I do not have. I know first hand that shaving the head as far as you can go was a mistake. It lost alot oif power doing so. I have always wondered if I relieved the block after I shaved the head if it would of breathed and jscked the compression up. I had a aluminum finned head that I was going to use on it.
When I worked on the straight 8 Custom motor I ported and polished everything as well as I could and it seemed to help alot.

Thanks Charlie, I remember your tractor pulling at the Vanderburg Co. fair years ago. The one thing that stuck in my mind was the sweet sound of your tractor. Back in the day we were pulling hot rod tractors, we had two of them and traveled around IN,KY,IL,and OH. I sure do miss those days early 70's. The Calhon KY pull always seemed to be fun because you could do things there that you could not at other pulls, and after the pull was over you had to dodge the PBR, and Strohs bottles. Some guys were drinking the same stuff that they where running in there gas tank, now that was funny. We all had shirts that matched ( KUNTZ PULLING TEAM ) they were Oliver green wish I still had them.

Chances R, Is tha the same custom that won the 1950 Indiana state tractor pull? Did you ever pull or attend the Indy Super pulls at the state fairgrounds?

Hi
Nope it is not the same one. 1 of the main differences is that 1 had the fluid power drive train, and mine has the new process 5 speed transmission.
I took my 101 super to the state fair in 1983 and then in 1984. I won my class in 1983 and in 1984 was flagged for my wheelie bars touching the ground. That was the last time I was up there for any kind of competition.
A couple years ago I offered to put on tractor driving competition for them, but they never would respond to my offer.
Take care.

Chances R
I have a 101 with the small Chrysler engine bored .125 over. The block tag says Industrial and Marine. I started pulling with this engine setup in 1980. It is my understanding that these blocks had thicker cyl walls. I now of a current pulling tractor with a 250 block, bored .125 over with chey 235 pistons and a 265 stock crank. The chevy pistons will stick out of the block, remove only the area that contacts the head. This will increase the compression ratio. Some of the big blocks can not be bored oversize this much. Behind the water pump is a cooling tube that can be removed to look at the cylinders. Some engines have a flat spot on the outside of the cylinder wall to allow extra clearance for the cooling tube. These engines can't be bored oversize very much. A lot of these engine will have the word "Canada" cast on the block. Releiving the block between the valves and cylinder was done to the Ford flatheads, because the valves were at an angle to the bore. The valves in the crysler flathead are parallel to the bore. Removing material in this area will lower the compression ratio. Flatheads respond to higher compression ratios just like overhead valve engines do. Putting larger valves in these engines requires opening up the head for clearance. This will also lower the compression ratio. Back cutting the valves will help. Also grinding the valves so they sit as high as possible on the block will help the air flow a lot. The late model industrial engines had a better cam and would be worth a few horses. Try to find some of the later model heads, these are higher compression. I had .090 removed from my head with no problems, after I put spacers under the spark plugs so the exhaust valve wouldn't hit them. Pick spark plugs that don't extend very much will help. I hope this helps.