Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

New Hood Vent - Tastes Great & Less Filling

Old 04-21-2010, 06:35 PM
  #31  
James Bailey
Addict
Lifetime Rennlist
Member
 
James Bailey's Avatar
 
Join Date: Feb 2009
Posts: 18,061
Likes: 0
Received 8 Likes on 6 Posts
Default

Since some one asked , a couple more ....Mark I moved the fenders out two inches on each side a few years ago. Then added 4 inches to the carbon fiber hood and 4 inches to the glass "S-4" front cover. The rear GTS 1/4 s were then too narrow so added some flair , easy as they are glass 1/4s. The rear "wing" is a modified Mustang unit added only because my Son in Law likes big wingy things...... The big hood vent has been marked out on the hood for years just never got around to cutting it out. As it still has a belt driven fan it should get some thrust
Attached Images   
Old 04-22-2010, 12:03 AM
  #32  
robot808
Rennlist Member
 
robot808's Avatar
 
Join Date: Dec 2006
Location: Elmhurst, IL
Posts: 2,483
Likes: 0
Received 3 Likes on 1 Post
Default

awesome work ken. how bout sharing that form for that splitter?
Old 04-22-2010, 11:18 AM
  #33  
mark kibort
Rennlist Member
 
mark kibort's Avatar
 
Join Date: Feb 2003
Location: saratoga, ca
Posts: 29,946
Received 141 Likes on 60 Posts
Default

jim, what is the plan for paint? are you doing all the priming with rattle cans, or are they all just patch work? then, off to miracle for a quick mask and blast? I heard the water based paints now are junk. anyway to get the "good stuff" on the black market and find a spray booth or make one and do it yourself???
Old 04-22-2010, 12:32 PM
  #34  
Vlocity
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,333
Likes: 0
Received 4 Likes on 4 Posts
Default

awesome work ken. how bout sharing that form for that splitter?
Thanks....Did you email me previously about making these?

I have a rather sophomoric cardboard template, but I would be willing to part with it if someone could draw this in CAD and make it available.

Regards,

Ken
Old 04-22-2010, 02:07 PM
  #35  
mark kibort
Rennlist Member
 
mark kibort's Avatar
 
Join Date: Feb 2003
Location: saratoga, ca
Posts: 29,946
Received 141 Likes on 60 Posts
Default

Pics up

https://rennlist.com/forums/7504781-post4.html

Originally Posted by Iwanna928
Pic's Mark!

Stephen
Old 05-12-2010, 02:51 PM
  #36  
Vlocity
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,333
Likes: 0
Received 4 Likes on 4 Posts
Default

I thought I would post the inital experience with the vent. I am headed to the track and will give you a complete update when I get back but the first impression is remarkable.

I went out last night and bedded a new set of pads and rotors so several
hard pulls later, the guage had not moved above the first hash mark !!!

My gauge usually runs dead in the middle. I cruised around for another half hour and the car continued to run ultra cool. When I got back in, I shot the upper radiator hose with my pyrometer and it was 158 degrees.

NICE !!!

The other odd thing is that the car is quieter....less wind noise?

Here are some final pics before I head off to Mid Ohio.
Attached Images    
Old 05-12-2010, 03:17 PM
  #37  
Rick Carter
Rennlist Member
 
Rick Carter's Avatar
 
Join Date: Apr 2004
Location: Central Ohio
Posts: 10,133
Received 68 Likes on 44 Posts
Default

I really like that Ken, I may do that to my street car.
Old 05-12-2010, 03:45 PM
  #38  
ibkevin
Defending the Border
Rennlist Member

Rest In Peace
 
ibkevin's Avatar
 
Join Date: Aug 2003
Location: Sun Diego
Posts: 17,541
Likes: 0
Received 2 Likes on 2 Posts
Default

A classic 968 RS hood styled vent, very nice.
Old 05-12-2010, 04:20 PM
  #39  
Tony
Addict
Lifetime Rennlist
Member
 
Tony's Avatar
 
Join Date: May 2001
Location: Las Vegas
Posts: 14,671
Received 580 Likes on 302 Posts
Default

Nice...perhaps color match it?
Old 05-12-2010, 04:40 PM
  #40  
Bill51sdr
Fleet of Foot
Rennlist Member
 
Bill51sdr's Avatar
 
Join Date: Aug 2003
Location: We are there!(San Diego)
Posts: 10,780
Received 49 Likes on 40 Posts
Default

Originally Posted by Tony
Nice...perhaps color match it?
+1, would look much better red, imho.
Old 05-12-2010, 04:47 PM
  #41  
Iwanna928
Rennlist Member
 
Iwanna928's Avatar
 
Join Date: May 2009
Location: Woodstock Ga.
Posts: 1,482
Likes: 0
Received 0 Likes on 0 Posts
Default

Color match would be cool. I like that pic mark. I like the simplicity of the vent. Way cool! I want one. Maybe when I get done doing some stuff that takes a priority. I will just add it to a very long list of stuff.
Old 05-12-2010, 04:56 PM
  #42  
Vlocity
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,333
Likes: 0
Received 4 Likes on 4 Posts
Default

Everyone that I've polled who saw the car in person said leave it black.

So..........maybe for next year after some more walking around it.

The bottom line for me is that it seems to be working very well and some of that credit goes to the baffles that I made on the high pressure side of the radiator.

Ken
Old 05-12-2010, 05:59 PM
  #43  
Carl Fausett
Developer
 
Carl Fausett's Avatar
 
Join Date: Dec 2001
Location: Horicon, WI
Posts: 7,005
Likes: 0
Received 59 Likes on 43 Posts
Default

Very clean, and most important: functional. I hope it tests out at Mid-Ohio for you.

My personal color vote is leave it black. The bumper beading, fog light surround, headlamp washers, and S chin spoiler are all black. It works for me.
Old 05-12-2010, 06:14 PM
  #44  
mark kibort
Rennlist Member
 
mark kibort's Avatar
 
Join Date: Feb 2003
Location: saratoga, ca
Posts: 29,946
Received 141 Likes on 60 Posts
Default

you dont need all that plastic sheeting. the air will flow to differential pressure, and at the front the air will move through the radiator due to the pressure of near .2psi, at high speed, but the real issue is leakage to the sides of the bumper shocks and downward. (clear path to sides and under car, but there is enough pressure in front of the radiator to induce flow.). also, you dont need to have that rickity plastic behind the supercharger. its doesnt do anything either. the actually, you want any and all higher pressure air to vent upward, even if some of the underhood air can make it rearward, which it will. you can measure this with tufts and "Under-hood-Cam" .

Personally, I think it would look good painted red, but it would be a big hassle to do so, and black doesnt look that bad.
Old 05-12-2010, 08:13 PM
  #45  
Vlocity
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,333
Likes: 0
Received 4 Likes on 4 Posts
Default

Very clean, and most important: functional. I hope it tests out at Mid-Ohio for you.
Thanks Carl, I expect to give it a good test. I hope to see you at our event next year.

also, you dont need to have that rickity plastic behind the supercharger
Mark, I didn't need to use the barge boards that I built.....I was talking about the pieces that I have in front of the radiator to direct all of the flow to the radiator and heat exchanger cores.

The bottom piece is to fill a gap that there was between the front of the spoiler and the lower radiator core support. I believe air was spilling over the front of the spoiler into this opening and under the car. Now it has to go through the radiator.

The upper pieces are to keep the air driving to the core. Most of the articles I have read talk about the huge increase in cooling effeciency with properly designed cowling for the radiators.

You'll notice I even have a piece of foam in place where the head lamp arm swings through.

Regards,

Ken
Attached Images    

Thread Tools
Search this Thread
Quick Reply: New Hood Vent - Tastes Great & Less Filling



All times are GMT -3. The time now is 03:36 AM.