Spotted these on another forum.
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from the off i decided i wanted an engine that would rev but still be quite responsive so rather than destroke the engine to get the rod length to stroke ratio right i decided to increase the stroke. now, when you stroke a yb you normally end up with a less than ideal ratio. what you need is a MUCH taller block enabling a longer stroke but also more importantly longer rods...... much longer rods! the millington engine had a 8mm taller block but even that is not ideal for what i wanted so i had to make my block taller. in simple terms i have added a spacer on top of a 200 block and then linered through both parts...ping, tall block! now all that seems simple but believe me it's not, there's a lot to consider!
for the moment here's what i want to reveal about the new donkey....
* it's more than 2200cc
* the rods are just under an inch longer than standard
* the crank has a longer stroke
* the bores are larger than standard and are nicosil coated
* the head has big ports, big valves, solid lifters and spunky cams
* the inlet manifold is made up from an m.i.s. mag plenum, jenvey individual throttle bodies and a jenvey manifold which had to be chopped and welded to get it under the bonnet!
* turbo spec is secret for now as 2 were tried and one was chosen
* the engine misses the bonnet by 5mm Surpris
* it has loads more potential for extra power
* the dyno figures are 100% accurate, some might claim more but reyland horses have always been strong!
........
734hp and 500ftlb uncorrected
702hp and 490ish torque corrected
oh and it makes full boost by 4000rpm..