3 7/8 Stroker

[ford38v8]

Originally Posted by 40cpe

you can't believe everything you think

fify

[flatjack9]

Man, I give up. This guy is never going to see the light. It's like talking to the wall.

[flatjack9]

Originally Posted by Tim Ayers

This is an interesting topic. I agree with some in that a 3 7/8" stroke has been replaced by the 4" or more stroke cranks. I'm interested in those that have de-stroked their engines in order to fall into different race classes.

I believe Barney Navarro did this and I'm sure others as well.

I would assume the de-stroking process work in opposite of the stroking process.

Plus, I'd assume there are other advantages of having a large bore, short stroke engine as well.

Yes destroking works just in the opposite direction. The whole decrease in stroke is at the top in this case(just joking of course). Large bore, short stoke engines are the norm today, I would think largely due to the fact that you can fit larger valves to get more airflow, hence more horsepower. Also allows higher rpm due to the decrease in piston speed.

[Ken/Alabama]

Originally Posted by flatjack9

Man, I give up. This guy is never going to see the light. It's like talking to the wall.

Well said! Thank you! I was tryin to stay out of this.

[Ronnie]

Here u go "FlatJack" It does feel good when you stop

R

[rich b]

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Originally Posted by tubman

What I am saying is that at TDC the top of the journal is the same distance down from the deck as stock. At BDC, the distance from the upper surface of the journal to the deck is 1/8" more than stock.

You have to quit thinking of the offset ground crank as still being a "large" journal crank; it is now a "small" journal crank and the distance from the top of the journal is a 1/16" closer to the deck than a stock "small" journal crank.

[flatjack9]

Originally Posted by Ronnie

Here u go "FlatJack" It does feel good when you stop

R

Yep. Got rid of Excedrin headache #1.