[guidos]

Well it was a interesting day as usual. I will try to keep this short.

As is set up, with tripower and 1 7/8 Dougs with header evacs (they are on my headers) it made a best of 590HP @ 5800 RPM and 618 Tq @ 4200RPM.

Put on the 2" Hooker super comps with no Header evacs and it lost about 5 HP and torque was down more.....didn't expect that! (more reasoning on this below)

Then we swapped the tripower for a Northwind, with a 1" open spacer: Still had the 2" headers on:

IT MADE 635 HP @ 6000 and 626 TQ @ 4700 RPM.

We then tried the 1 7/8 Dougs back on with no other changes,
it made 638 HP @ 6000 and 633 Tq @ 4700. (best of the Day)

So then we tried blocking the header evacs with no other changes, LOST 17HP!! Blow by was causing grief for sure.

SO the header difference might be due to no header evacs on the 2" headers. It would of been a good test to try them with header evacs, just didn't have the set up for it.

We also removed the 1" spacer and just ran the Northwind with no spacer and it lost 10 hp and 10 ftlbs across the board.

Didn't have enough time to try the other cam.... unfortunately.

I was surprised that the tripower wasn't higher....damit, 50 HP is alot to give up....might have to fabricate a tripower intake.