mercruiser 470 crank in a engine
 

I was wondering if anyone had sized up a mercruiser 470 crank for potential fitment into an a engine. Thinking that if one is casting a block then sourcing a suitable inexpensive crank should be a consideration..
The merc 470 gets some bum reviews now a days, but I had the pleasure of working on a few of them 15 years ago and they had some pretty impressive power. They were pretty plentiful back in the day, and I bet there are still many out there to be had cheap.
Thoughts??

Re: mercruiser 470 crank in a engine
 

is that a 151 GM engine,if so it will not work. The distance from number two and three cylinder is to great. The A needed more room because the dist. was between 3,4.

Re: mercruiser 470 crank in a engine
 

No, its much larger. it uses a 460 ford cylinder head on top of a cast aluminum block.

Re: mercruiser 470 crank in a engine
 

http://i1102.photobucket.com/albums/...0%20cran_1.jpg

470 bottom end

Re: mercruiser 470 crank in a engine
 

If the length is right you could make it work. What is the stroke?

Re: mercruiser 470 crank in a engine
 

the 470 made 190 Hp and approximately 275 Lb-Ft of torque. It was 3.7 liters.
I am uncertain of the stroke, but they say the engine was half of a 460 ford...???

Re: mercruiser 470 crank in a engine
 

Stroke on a 460 motor is 3.85 and on the "A" motor it's 4.25. Nice looking crank in that Mercruser though

Re: mercruiser 470 crank in a engine
 

The Mercruiser 3.7 L 224 cubic inch engine is an inline 4-cylinder. It uses one cylinder head from the Ford 460 V8 and the same 4.36-inch bore as the 460. Stroke is 3.75 inches, which is shorter than the 3.85 inches of the Ford engine.

Re: mercruiser 470 crank in a engine
 

Im thinking that if you were to take the internals from this engine and cast a block to fit them into that dimensionally looked like an A engine you could produce one nice motor at a low cost. Would make an interesting project for when I retire LOL

Re: mercruiser 470 crank in a engine
 

I think 3.75 would be a good stroke. You could in crease the RPMS with out breaking a crank. If the length is right I would think it would work fine.

Re: mercruiser 470 crank in a engine
 

I thought the stroke on a Model A was 4-1/4" ?

I believe 3.875 is the bore.

3.75" isn't a bad stroke though...

Re: mercruiser 470 crank in a engine
 

This thread intrigued me since I have had 2 vehicles in my past with the 429/460 engine in them. I always thought that engine was a great engine. I just thought that of 1/2 of that engine in a Model A would be interesting.

Re: mercruiser 470 crank in a engine
 

He said those engines are cheap. It would be easer to put the engine in a model A, than putting the crank in the A engine. But sounds like it would be a nice project either way.

Re: mercruiser 470 crank in a engine
 

No, I was thinking of casting a 5 main block that would utilize the 470's internals IE crank, rods, bearing caps, ect. Was thinking it may be economical to do so??