What is the purpose of this I would assume to stroke the engine for more displacement. If so what would the new R/S ratio be and how much displacement would this setup get . just asking cause I saw these pistons here .... http://www.theoldone.com/components/pistons/ also has anyone had any experince with this setup?

 

I've seen that before, not sure how it can work with the deck hight staying the same, but its not a bad idea, as far as the rod ratio goes, but the B16A already has an excellent Road ratio, so why go to all that trouble. That money could be better spent in other places.

 

yeah I just saw it on that site and I had never heard of it before so I was just looking for a little info on this

 

FYI B20 rod is the same as an LS rod. and are you assuming use of a b16 block?

 

yes check out my link to the edyln website

 

Guys,
this is the combination i am building.

The purpose of the B20 rod is to give a higher r/s ratio.
The piston Pin in the piston is moved up to accomodate for the longer rod.

The reason for this is to facilitate a higher revving engine, with lesser side load on the cylinder bores.

Smokey Yunnik was a BIG fan of longer rods.
Something to do with more torque in mid to high rev range.

 

so the purpose of this is to de-stroke the engine ok cool. Now what is the new displacement and rod/stroke ratio.

 

1.77:1 rod ratio, not sure about the displacement, and dont feel like doing the math. but you can use http://www.search.com and find the math equations to figure it out.

 

so with this revised r/s ratio do you feel that the bottom end would be good to say 11,000 rpm (provided you have the correct head work/valve train/cams)

 

the displacement of an engine is not governed by rod length, not piston pin location.
It's governed by Crank displacement and Cylinder bore diameter.

Since none of those change, then the displacement is the same

 

not with factory rods & pistons.

11,000rpm may be attainable with forged rods (ie carillo or Eagle), and with roller cams and followers. But why would you want to rev that high anyway? You'd need a camshaft that made power in that rev range. To make power in that rev range, you'd have absolutely no power until 5000rpm anyway.

but definately not with stock rods


[Modified by evo75, 3:32 AM 6/8/2002]

 

thats why I said provided you have correct valvetrain/ head work / cams in my post