Is there plans to do any cam changes with the turbo upgrade? I hope to build an engine for myself someday and keep going back and forth on a 90cc or 110cc IP to achieve 300 to 350 crank hp. I figure either will make the power, it will just depend on how well the rest of the engine is tuned to the fuel amount. What are your thoughts based on your platforms?
I'm pretty sure a 90cc won't make any more than around 225 RWHP, no matter what you throw at it... I'd guess this to be somewhere around 280 crank?
A RD2-110 is supposed to be good for 300RWHP, but I've only seen 250... fully limited by the turbo.
A better cam might help, and I'd like to install one(I actually have a R&D stage 1 sitting in my living room right now), but I doubt it'll help get much above the 250 turbo-limit.
With a better turbo, I have no doubt that a RD2-110 will push more than 250, probably in the 300 range... a cam will probably help, but I don't have any a/b numbers.
Be aware, though, that putting in a cam can be a challenge. Not installing the cam, but making darn sure of your clearances beforehand.
Even a stock cam can cause pistons to hit the valves, if the heads aren't recessed properly, and the R&D cam has a higher lift. Now... it *should* work just fine, but I'd really check all the clearances before hand. Otherwise, you might end up with a tick after a few thousand miles, as your valve guide gets destroyed by the constant valve/piston interaction.
And that's the *best* case.
edit:
As far as coolant leaks go, in March I saw them on both sides of the engine equally. Sure looked like it was coming down off the headgasket.
Now, I've only noticed some 'residue' on the oil filter, having obviously run down the side and then dried.
Could be the oil cooler O-rings; I'm not sure, though it appeared to drain down the "drivers" side of the filter, not the "front" side that it would have if it came out of the O-ring... I think.
