willyb42

Name: Mack B 42 (1962)

Date Added: 24 February 2009 - 03:34 PM

Owner: willyb42

Short Description: Single axle dump truck

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Welcome! Nice Macks!

Willy,

This has been an ongoing discussion here for several years.

Look into the old forums, and you will find a lot of information

about retro-fitting a turbocharger to your NA 673.

The general consensus is that the engines were not set-up to

accept a retro-fit turbo, but in some instances there have been successful

installations. (There have been plenty of meltdowns too)

The early turbocharged 673 engines may not have had the oil cooled pistons,

and were also limited in their rated power (205 hp, I think).

The later units were rated up to 250 hp, and had the oil cooled pistons and

other modifications to handle the charge air pressure.

Regardless - the engine is not a good basis for a hot-rod motor.

If you can go back and buy the whole E-7 engine, it might be a better starting point!

Actually, by the time you are done with the retro-fit, if it's done properly you will have spent

a small pile of money and a big pile of time.

You might consider purchasing an early Maxidyne 237, 250 or 285 hp, and probably will be much better off.

I don't mean to be the bearer of bad news - but the retro-fit turbo route is a tough path to be on.

Paul Van Scott

Thanks for the Info. I have thought about the 237 route, but the 673 i have was completely overhauled less than 10k ago and kinda want to keep it. would b nice to have a little more umph on the hills though! But thank you very much for the input, The truck is still a real blast to drive around. maybe I will just leave it alone. thanks

I recently purchased a turbo from a good running E6 350 hoping t o install it on my 1962 b model with a END 673. I was told after purchasing it that unless the motor was originally equiped with a turbo, the pistons are to weak to handle it. Any Help?