New C4SP (single plane) design...
Thread Starter
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
New C4SP (single plane) design...
Primarily just a revised plenum design... This is the type I would've liked to have done in the beginning and had actually started building one but wound up being too tall. So, I built the box-style for expediency and though it works fine it isn't the optimum for airflow. Many who have this manifold have inserted an angled piece to steer the air into the manifold rather than let it gather and shear it's way in; and it was a complaint by several as well. While I feel that the original design worked and worked well (I did flowbench test overall flow); I cannot ignore the self-known fact that air does not like to turn sharp corners. This was most apparent recently to me when a friend failed to realize as much of a gain on nitrous with the old plenum as he did with another manifold; he was using a typical NOS 5151 plate which sprayed to the back of the plenum instead of following the tract down into the intake. All of that has been rectified with this system. So...Here's the revised plenum. Additionally, I've revised the fuel feed/return/regulator layout and will post a pic of that later...
-Jeb
-Jeb
Last edited by jburnett; Dec 14, 2005 at 02:28 PM.
Thread Starter
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Originally Posted by bogus
facinating.
the motor looks basically stock, how does it run?
the motor looks basically stock, how does it run?
-Jeb
Thread Starter
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Originally Posted by bogus
oh. I thought it might have been a test bed motor.
how does it perform on the intended motor?
how does it perform on the intended motor?
-Jeb
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Jeb,
What about the t-stat housing. I am in the process of moving to a Team G and a similar plenum assy, but had to totally revamp the housing area to make it work. What are you doing in that area?
Additionally, my fuel rails are mounted the same as yours, but I am considering adding some stanchions at the top of the ports to mount the fuel rails. Thoughts?
BTW, I have been running a mucho modified (top has been cut off, much welding & flow bench time) MRII.
Aaron
What about the t-stat housing. I am in the process of moving to a Team G and a similar plenum assy, but had to totally revamp the housing area to make it work. What are you doing in that area?
Additionally, my fuel rails are mounted the same as yours, but I am considering adding some stanchions at the top of the ports to mount the fuel rails. Thoughts?
BTW, I have been running a mucho modified (top has been cut off, much welding & flow bench time) MRII.
Aaron
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Thread Starter
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Aaron, I cut and section the water passage on the manifold (as you can see by the weld and lower position) and then use an OEM TPI water neck that is also cut, sectioned, and rewelded.
As for the stanchions, considering how little pressure is seen on the rails the arrangement I have works perfectly. In fact if you notice on most converted EFI single planes the same arrangement is there except they're usually made of 1/2" bar stock instead of 1/2" round stock like I use. I've actually used the fuel rails to break the silicone seal when pulling the intake off a motor and they don't move. If it works why "fix" it?
Rodj, I haven't decided yet but it will be in line with what I was asking for the old style manifold.
I do believe large plenum volume is good in certain applications, my previous design had 60% more volume than this one does but the turbulence created was detrimental.
-Jeb
As for the stanchions, considering how little pressure is seen on the rails the arrangement I have works perfectly. In fact if you notice on most converted EFI single planes the same arrangement is there except they're usually made of 1/2" bar stock instead of 1/2" round stock like I use. I've actually used the fuel rails to break the silicone seal when pulling the intake off a motor and they don't move. If it works why "fix" it?
Rodj, I haven't decided yet but it will be in line with what I was asking for the old style manifold.
I do believe large plenum volume is good in certain applications, my previous design had 60% more volume than this one does but the turbulence created was detrimental.
-Jeb
Drifting
Joined: Apr 2003
Posts: 1,379
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From: rome ny
Originally Posted by jburnett
Yup...
The old design worked, but it was not optimum...
-Jeb
The old design worked, but it was not optimum...
-Jeb
did you have to cut the housing and reweld? could use a low profile housing.
why not just use the victor efi with rails, plus its an inch lower than standard super vic.
http://www.edelbrock.com/automotive_...ds_chevy.shtml
Last edited by mos90; Dec 15, 2005 at 04:33 PM.
Safety Car
Joined: May 2003
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From: [Quote=WOEII] Is dried brown doodie powders man! [/Quote]
Jeb,
PM me or post a price.
I had a hell of time getting the original plenum to seal. It looks like you used a carb spacer and welded the new plenum to that. I was going to have that done to my plenum with a milled down spacer. It would have been a very tight fit.
It looks like in the plenum pictured you fabbed and welded on a cruise and throttle cable bracket, is that correct? And, is the throttle body in the same location as with the previous plenum? I had some minor clearance issues with my T-stat housing on the first go round.
Will there be enough hood clearance to squeeze in an N2O plate? I recall you saying this could be done with the jr., but not with the original plenum and the Super. Another thing I don't see is the drilled and tapped holes for vacuum and the IAT sensor in the rear of the plenum. Do you plan on, or would you be willing, to provide those?
PM me or post a price.
I had a hell of time getting the original plenum to seal. It looks like you used a carb spacer and welded the new plenum to that. I was going to have that done to my plenum with a milled down spacer. It would have been a very tight fit.
It looks like in the plenum pictured you fabbed and welded on a cruise and throttle cable bracket, is that correct? And, is the throttle body in the same location as with the previous plenum? I had some minor clearance issues with my T-stat housing on the first go round.
Will there be enough hood clearance to squeeze in an N2O plate? I recall you saying this could be done with the jr., but not with the original plenum and the Super. Another thing I don't see is the drilled and tapped holes for vacuum and the IAT sensor in the rear of the plenum. Do you plan on, or would you be willing, to provide those?
Drifting
Joined: Apr 2003
Posts: 1,379
Likes: 4
From: rome ny
Originally Posted by LT4POWR
Very nice 
You could also run a plate N2O kit between the plenum and single plain.
You could also run a plate N2O kit between the plenum and single plain.jeb, that is a good idea if it would clear.
Melting Slicks
Joined: Oct 2000
Posts: 3,426
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From: Heidelberg PA
Cruise-In V Veteran
Originally Posted by mos90
doesnt the super vic have an efi intake from the factory? i know vic jr does. it wouldve been easier.
did you have to cut the housing and reweld? could use a low profile housing.
why not just use the victor efi with rails, plus its an inch lower than standard super vic.
http://www.edelbrock.com/automotive_...ds_chevy.shtml
did you have to cut the housing and reweld? could use a low profile housing.
why not just use the victor efi with rails, plus its an inch lower than standard super vic.
http://www.edelbrock.com/automotive_...ds_chevy.shtml
Drifting
Joined: Apr 2003
Posts: 1,379
Likes: 4
From: rome ny
Originally Posted by 85vet
The slight issue with there efi version is : The injector bungs protrude into the intake at the tops of the runner. This happens to be the most important aspect of the flow and jebs does not protrude or block air flow.
can i use the same stock style injectors with this setup?
Last edited by mos90; Dec 15, 2005 at 10:35 PM.