*sigh*
Oh dear...Seems I've offended the 'RB30 bottom end' crew.
Gimp suit in the wash at the mo'. It's just regular old Shaun for today *LOL*
Look,I'm sure an 3-3.1L RB with a twin-cam head can make lots of power and is great fun, and I know it CAN work very well (Wilall racing as an example, especially [yes, yes- that's an OS Giken kit]), and I didn't mean to step on the toes of anyone that's gone to the trouble of doing the conversion themselves.
But I just don't think that using the 85mm stroke crank from an RB30 is the best idea for engine longevity/reliability at high engine speeds.
But it's all relative.
To be at the pointy end of 1/4 mile competition, you would be rebuilding/pulling down the engine on a fairly regular basis (in comparison to a mildly hotted up performance engine, anyway) to make sure everything was still o.k
Like I mentioned in my original post
'ALL THINGS BEING EQUAL'- i.e rod/piston strength & weight, the shorter stroke engine will be able to rev higher, before mechanical limits come into play, due to the lower piston speed.
More revs = more combustion cycles per unit time = more torque = more power (if the motor is designed/blueprinted for it)
Yes, the 3L has more capacity (approx 66cc per chamber, wow), but, within this engine design, IMHO it's not as important as the rev limit of the motor with regards to how easily it makes big (v.big) power.
Hope this clears things up
p.s Wil- no more taking my posts out of Whoretown