|
10-12-2013
|
#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
|
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?
__________________
LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
|
|
|
10-12-2013
|
#2 |
|
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
|
Re: Dropped plenum question
__________________
LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
|
|
|
|
10-12-2013
|
#3 |
  
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
|
Re: Dropped plenum question
big runners and dropped is so sexy....that's about as helpful as I can be
__________________
It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
|
|
|
|
10-13-2013
|
#4 |
 Join Date: Aug 2009
Location: Livermore, Ca
Posts: 204
|
Re: Dropped plenum question
Isn't the TB the restriction on air flow into the plenum ?
__________________
1990 ZR-1 #642 |
|
|
|
|
10-13-2013
|
#5 | |
 Join Date: Jul 2005
Location: Jupiter, Fl.
Posts: 815
|
Re: Dropped plenum question
Quote:
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. |
|
|
|
|
|
10-13-2013
|
#6 |
|
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
|
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.
__________________
It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
|
|
|
|
10-13-2013
|
#7 | |
|
Join Date: Dec 2012
Location: Tampa, FL
Posts: 118
|
Re: Dropped plenum question
Quote:
|
|
|
|
|
|
10-13-2013
|
#8 | |
|
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
|
Re: Dropped plenum question
Quote:
__________________
It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
|
|
|
|
|
10-13-2013
|
#9 |
 
Join Date: Jul 2005
Location: San Antonio, TX
Posts: 651
|
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
__________________
Mark Horner President, ZR-1 Net Registry 91 ZR-1 #2016 95 ZR-1 #21 DRM-600, LPE 385 |
|
|
|
|
10-14-2013
|
#10 |
Join Date: Mar 2004
Location: Found Member
Posts: 4,346
|
Re: Dropped plenum question
Geez Mark , that entire car is a work of art ! Talk about one well sorted out car.
__________________
Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237 |
|
|
|
 |
|
|
Linear Mode
