273 commando cam

I ran a very nasty 273 for years. The best bet is high lift short duration to keep as much low end torque as you can. They made a 275hp verion in he D dart and it was a racer brown type cam I think and in my old National Service data book it listed a cam with .528 lift. Seat pressure was like 260 .So it had some very still springs and afast flanked solid cam.

I played around with several of the old school mopar grinds, they seem flat on the low end and gradually pulled harder once in the power range for each cam. I think one was like a 280 ish and one was a 292 ish grind. Again both longer on duration and lift was under .500. These were hyd. cams and I was not to happy. So I went back to the Isky I had custom ground. It was a solid lifter design very close to the D Dart 275 HP cam. I ran custom 11.25 pistons .040 over, and with the heads surfaced I was in the 12.0 range. Had to have 100 octane which was very easy to get in the early 70s.

I had both 4 spds and a 727 with manual v body. Ran 4.10s in the 8 3/4. I think I was running a 3900 stall when I went auto 727. My red line was in the 8k range. I had about 7k in the engine and trans and that was in the 70s. Never broken the engine.

Anyway it put out 265 HP to the rear wheels. Bot bad for a 273. Stock it put out 135 with the 2b motor. And the 135 went to about 155 with headers and a 625 AFB on a Holley street dominator that was modifed.

So this is probaly on the high end Bill of what you are looking for. But as mentioned you can over cam real easy a 273. When I had the cam I liked it was not a gradual pull like the hyd mopar gring. It was all or nothing more or less. Once I got in the 4k range it screamed very good. Peak torque was at 5500 with the cam and stayed flat to 6200. Peak HP was at 7800 with my setup. I wasted many a Boss 302 mustang i nthe day. Eveyone thought it was a 340.. nope just a lil ol 273!

well hope that give some insite? Look at the Isky solids cams I think that will fit the ticket for you. Get a grind in the 2500-6000 range for street.