Dropped plenum question
 

While we have some hood restrictions...would it not make more sense to have a topped vs dropped plenum to get the plenum runner further from the ceiling/wall? As in adding the volume to the top of the plenum?


Any thoughts?

Re: Dropped plenum question
 

Re: Dropped plenum question
 

big runners and dropped is so sexy....that's about as helpful as I can be

Re: Dropped plenum question
 

Isn't the TB the restriction on air flow into the plenum ?

Re: Dropped plenum question
 

Yes, but you can get a bigger one of those.

Didn't Lingenfelter use the dropped plenum on some early (or all?) 415's?
I would think that with a dropped plenum, and siamesed runners, you would need a BIG stroker sucking on it to keep the port velocity up.

If you did anything to the top of the plenum, you would need a high rise hood. Mine's banging on the hood now, with just those phenolic plenum spacers.

Re: Dropped plenum question
 

LPE used the dropped plenum on some cars. Mark Horner's 385 has one, i know others have it also but i can't think of them off hand.

Re: Dropped plenum question
 

I have seen pictures of this on cars. What is it and what does it do? Where does the DIS module get mounted?

Re: Dropped plenum question
 

adds volume and the dis box gets relocated to the firewall

Re: Dropped plenum question
 

I have not pulled the plenum on the 385 Z since I've owned it, however Bob Hall tells me that it is a work of art! The DIS has been relocated.... I'll take plenty of photos when the time comes to remove it. I understand that the dropped plenum added quite a bit of torque throughout the rpm range.

I always wondered what happened with Bill Kirchoffer's prototype carbon fiber plenum. Anyone remember seeing it at BG in 2003? I recall it having more space up top and direct ports to the IHs.

Mark

Re: Dropped plenum question
 

Geez Mark , that entire car is a work of art ! Talk about one well sorted out car.