NOTICE: Never got to finish this sections dyno results, sorry guys.

Dyno results:

Here is my baseline dyno before the new head:

Here is the baseline with the new head, I had to upgrade my injectors to ?? because I was maxxing the stock 240cc ones out, so this graph includes those:

IN THE FUTURE ............

This one is after cam gear adjustments and afc tuning:

IN THE FUTURE.......

Manifold temperature results:

Well as you may know I bypassed all the coolant lines going to the IM and TB as well as made a garolite spacer for the intake manifold. I took temp readings before and after and here are the results, all temps are F. These are taken off the surface with an infared temp. reader as I have no way of getting the air temp from in the manifold itself. Nonetheless even though this isnt the actual air temp it does show how much lower manifold temps are running.

Before:

After, take note that the intake air temp is higher and it was a hotter day when theese were taken so they are probably a few degrees higher then they would be if tested under the same conditions as the first:

Not bad, since I had already bypassed the coolant lines on the TB before the first test it's temp stayed the same, but there is a definite reduction of heat on the manifold. Worth it? Thats up to you to decide, I'm happy with it.

I beleve much of the heat still making it to the manifold is radiated through the air. I recently drove my friend to seatac airport in Seattle and it's about a 1hr 40min trip for me one way, it was a cool night and no rain, when I got home after the non-stop trip I popped the hood. The block, head, and valve cover were hot as ever +180F, but touching the manifold it was cool to the touch! Even down in the lower runners. If this had been my stock manifold with the FIV and EACV and coolant lines that go with them it would have been nearly as hot as my before temp. graph above, big diffrence.

Consequently the car seemed especially fast that night, with the cool air, manifold and 450cc injectors. I think opening up the engine bay with hood scoops and/or vents and anything else you can to do to keep hot air away from the manifold and intake could seriously help with performance when temps outside are high. Even more so now because that is almost the only thing adding any heat to the air now.