Jamie_GT3

This is a great read for those interested in understanding bore/stroke advantages for street and track engines...

http://performancedevelopments.com/g...-displacement/

sharkster

Quit causing trouble. The clinic only has room for three of us!

Jamie_GT3

Oh c'mon Alex, the more the merrier!

sharkster

Ok then....

bmwtye

Just to add to the fun, get a Manthy 4.3L GT3 involved in this shootout with Jamie, Alex, and Juan.

sharkster

mine's too slow and can't play with ze germans

bmwtye

If how long it takes them to build a Carbon Airbox is any indicator, maybe they wont even have the motor done in time for the challenge

Alan C.

Very nice looking part.

modoz61

Jamie - thanks Well written

Clearly size does matter ;-)

Alex - very cruel photo!

sharkster

Thanks alan... Hats off to James, Dan @ SharkW and John/Todd @ EVOMS for really crunching their heads on this Who needs a stock crank anyways!

Haha hey Dan just told me today that your boys from Oz enjoyed the ride:P

RSRanger

Well I understand what your saying but now with "obummercare" we'll have to share a bed at the clinic. We'll even have to bring our own sheets or lay on a bare mattress like they do in Cuba.

Ranger

Jamie_GT3

Point of the thread was to offer up an explanation as to what kind of "big engine" you'd want. All bore, bore x stroke, etc... And like anything else, it's more than the sum of its parts...

And for some of us size does matter

4.2>4.15>4.1

But in the end it is what you do with it...

cpturbo

Sounds like long rod and bigger bore with not too long of a stroke is best. What is your motor's rpm capability, Jamie? Power prediction based on design?

Jamie_GT3

Designed to be capable of 8800rpm, but we need to see where it runs out of airflow. Should be in the 8200-8300 range and we figure an honest 485-495whp or so. Maybe I'll be surprised and get over 500whp on an NA engine... We'll see...

m42racer

Thanks for posting this Jamie.

Nice to have good information available you can understand. Not many are prepared to share this stuff. Not surprised based on where this came from.