Frankenplenum

[Hog]

I wonder if eliminating the common plenum entirely would be of benefit? This would require 8 t-bodies. and 8 velocity stacks. I always wondered how those systems on teh older hot rods really worked. Individual runner length is easily individualized.

Complex as all heck, but would look cool poking through the hood!

[Paul Workman]

Yup! A sheet metal box(s) with shortish curved (funnel) runners... I haven't crunched the numbers yet for the runner/air box dimensions yet, but a Toledo hood (or the like) is prolly going to be part of the answer.

[LGAFF]

Originally Posted by tccrab

Lee:

What about those people who put on the phenolic plenum spacers some years ago complaining about rubbing holes in the hood?
If I recall correctly, those spacers were only 1/2 inch or so, surely what you've got planned will need more room than that.

'Crabs

I wonder if the runners are hitting, I am only raising the box...

As far as run a velocity stack setup, shorter runners make it more difficult to keep the car at idle.

[Dime]

It makes me happy to think that an aftermarket plenum may one day be made available by a savvy member of the brotherhood that will give our cars even more umph.

[Bob Eyres]

Originally Posted by tccrab

Lee:

What about those people who put on the phenolic plenum spacers some years ago complaining about rubbing holes in the hood?
If I recall correctly, those spacers were only 1/2 inch or so, surely what you've got planned will need more room than that.

'Crabs

I'm one of those people. They're still on there. The spacers are only 1/4", and it does rub enough to take the under hood paint off at the front.

This sounds like a job for one of those 3D printers...a big one that can use some heat resistant plastic.

[LGAFF]

What part of the plenum is rubbing?

[XfireZ51]

Originally Posted by Paul Workman

Yup! A sheet metal box(s) with shortish curved (funnel) runners... I haven't crunched the numbers yet for the runner/air box dimensions yet, but a Toledo hood (or the like) is prolly going to be part of the answer.

Pete used a Hogan sheetmetal plenum on Kevin's 441 several years ago. I believe it really didn't offer much improvement.

[LGAFF]

Originally Posted by XfireZ51

Pete used a Hogan sheetmetal plenum on Kevin's 441 several years ago. I believe it really didn't offer much improvement.

I wonder if the volume was sufficient...also velocity stacks might have helped flow....intake runners that share a wall with the plenum generally have flow opportunities....

[-=Jeff=-]

Originally Posted by XfireZ51

Pete used a Hogan sheetmetal plenum on Kevin's 441 several years ago. I believe it really didn't offer much improvement.

Originally Posted by LGAFF

I wonder if the volume was sufficient...also velocity stacks might have helped flow....intake runners that share a wall with the plenum generally have flow opportunities....

But that Hogans was a short runner intake.. Lee is looking to keep the runners as they are and expand the 'box' if I understand it correctly

[LGAFF]

Originally Posted by -=Jeff=-

But that Hogans was a short runner intake.. Lee is looking to keep the runners as they are and expand the 'box' if I understand it correctly

Correct, in terms of the plenum volume I had 2 Engineers from the program tell me thats were the most potential was; and in looking at intake development on Porsche, Audi, and the Coyote motor I saw comments on flow improvements on "unshrouding" runners from an intake ceiling/wall.

I will also add that there was a ZR-1 race car with a raised roof plenum in another country with a documented 15hp increase due unshrouding of the roof side of the runner.