Yep - plenty o' WHEEE. <img src="/forums/images/graemlins/kewl.gif" alt="" /> I'll be in Atlanta for the next few weeks - maybe you'll have a chance to drive it and see what your butt dyno says.

Charlie, take a look at the cam table I posted and see if this makes any sense to you -

What I find interesting is that the 3000GT TT closes the intake valve 11* earlier than the Diamante SOHC. Valve overlap is also reduced 9-11* on the 24v heads. The Montero heads sit close to the middle ground between the two extremes.

I would think that part of the reason the 24v heads can close the intake sooner is because they have better intake efficiency with the extra valves. The TT obviously has even better intake efficiency with the turbos and because the TT static CR is 8:1, it can use more boost than my 9:1. My engine has the benefit of minor intake port work + forced induction, so it should not need the intake open as long as a N/A SOHC engine and any extra delay is robbing available volume for the piston to compress.

On the exhaust side, the Montero cams open earlier than any of the choices. I don't think the early opening necessarily hurts power since most power is produced early in the downstroke. Since I have the single exhaust valve with only mild porting of the exhaust manifolds, I may actually need the early opening to clear the cylinders.

I guess the valve overlap is less in the 24v heads because of better flow which allows for more time in the power stroke, but again the Montero specs are middle ground.

Does that make any sense? If so, it's pointing me back to the Montero cams.

Frank