It's Bunger

[Bunger]

Cam gear should be about $50-60 shipped.

I think the CX/VX/HF TB's (the are all the same size... I was using a VX one on my HF engine before because I liked the cleaner look of the throttle body mounted MAP sensor) are around 40mm... damn small, I'll bust out my caliper when I get home and measure it.

I do know the other TB sizes off the top of my head:

D15/16 = 55-56mm
b18a / first gen b16a = 58mm
second gen b16a / b16b / b18b / b18c1 = 60mm
b18c5 = 62mm

If the CX/VX/HF one is really 40mm... that's a HUGE difference in area... as its Pi * Radius squared...

40mm diameter = 12.6 cm2
60mm diameter = 28.3 cm2

That's a cross sectional increase of 224%!!!

[SVOboy]

It is hugely different, yep. I have a d15b7 tb I'm going to use now until I can get all the cx stuff. The ports don't match well otherwise so I'll try and go all cx head/im/tb soon and get rid of the 56mm b7 stuff.

[Bunger]

I'm not sure, but is the CX head the same casting as the HF?

[SVOboy]

I believe so.

[Bunger]

I wonder if the cams are ground any differently. If I had one of each I could get them profiled. And on that subject, how bout a custom mileage grind?

[SVOboy]

MetroMPG has mentioned someone who does custom cam grinds for metros that has an mpg set up.