Re: 2-71 Super M

Posted by Wardner on August 04, 2007 at 12:19:55 from (4.154.241.200):

In Reply to: Re: 2-71 Super M posted by markloff on August 04, 2007 at 10:53:21:

No, I am not talking about the hydraulic governor. The pictures I have seen of cut hoods used a mechanical variable speed governor similar to what is used on vehicles and air compressors. The only hydraulic governor I have seen was in a GM service manual.

You call it a rear engine cover but most call it a flywheel housing. At the top of the casting are two openings about 6" in diameter. Access to the cam and balance shaft driving gears is there. Alot of accessories are driven from there. That would be air compressors, generators, tach drives, hydraulic pumps, etc. I was wondering whether you were planning to drive a live pump from either shaft. If not, there would be a stamped cover. Perhaps the 2-71 is set up differently than the larger 2 strokes.

There is currently alot of chatter on the Yahoo site about performance modifications. One guy is talking about a 375 hp 4-71 that GM built for marine applications. That would equate to about 187 hp for two cylinders. But you will never get it with a two valve head. I am not even sure that a two valve head can breathe adequately at 2100 rpm. I wouldn't know. I have nine Detroits rangeing from 4-53 to 12V71. They are all four valve.

As for selling, I have only sold two vehicles in the past 40 years. My KB-5 was my first purchase and it won't be sold, period. Now, if you want to buy the 12V71, we can talk. It would look bitchin in a Cub.

Replies:

• Re: 2-71 Super M markloff 14:37:44 08/04/07 (0)

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