inner fender well ducts

Moderator: Moderators

inner fender well ducts

Postby 67shovel » Tue Jul 03, 2018 2:32 pm

Saw somebody had posted a pic a while back with a fan under the hood blowing hot air out into wheel well about where the battery sits. Does that work well? I should have ducted my hood before I painted cuz it seems to got awful hot under there and I'd be interested in chasing that idea.

Thanks,
Roger
79 Monza wagon Pro street, cage tubs narrowed 9
73 GT Vega wagon street car 355 700r4 a/c
68 RS Z/28 302
67 SS 396
Cobra replica
65 Corvair Corsa midengine 301
http://pictures.sprintpcs.com/share.do? ... =RETRIEVED
67shovel
 
Posts: 310
Joined: Tue Jul 19, 2011 8:29 am
Location: Houston Tx


Re: inner fender well ducts

Postby chevyart » Tue Jul 03, 2018 10:20 pm

one of our guys did a very detailed experiment with all kinds of ways to get hot air out of engine compartment. i will see if i can find the posts. maybe the guy who did the study will chime in. im in the same boat as you. if you get info please post it art in NY
chevyart
 
Posts: 1964
Joined: Fri Oct 27, 2006 10:00 pm

Re: inner fender well ducts

Postby chevyart » Tue Jul 03, 2018 10:21 pm

one of our guys did a very detailed experiment with all kinds of ways to get hot air out of engine compartment. i will see if i can find the posts. maybe the guy who did the study will chime in. im in the same boat as you. if you get info please post it art in NY
chevyart
 
Posts: 1964
Joined: Fri Oct 27, 2006 10:00 pm

Re: inner fender well ducts

Postby 67shovel » Wed Jul 04, 2018 8:29 am

Thanks Art
79 Monza wagon Pro street, cage tubs narrowed 9
73 GT Vega wagon street car 355 700r4 a/c
68 RS Z/28 302
67 SS 396
Cobra replica
65 Corvair Corsa midengine 301
http://pictures.sprintpcs.com/share.do? ... =RETRIEVED
67shovel
 
Posts: 310
Joined: Tue Jul 19, 2011 8:29 am
Location: Houston Tx

Re: inner fender well ducts

Postby 79MonzaSpyder » Wed Jul 04, 2018 1:19 pm

Are you concerned just about under hood temps or are you overheating as well? Clyde on this forum has a good thread on beating overheating issues in the General Discussion area under "Cooling Thoughts".
The Fleet
2018 Toyota Camry XSE V6
79 Chevrolet 3/4 ton Pickup Fully Restored with matching 78 11' Camper
80 Monza 2+2, Cloned into a 79 Monza Spyder V8 4 Speed (Current Project)
80 Monza Spyder V6 Auto (parts car, sadly)
80 Honda CB750K Fully Restored with Custom Full Dress
80 Honda CM400A 10,000 Orig. Miles Full Dress
75 Honda XL250 Fully Restored (first vehicle I ever owned)
73 Honda SL125 off roader
72 Honda Motorsport 250 (XL250) off roader
User avatar
79MonzaSpyder
 
Posts: 282
Joined: Sat Oct 07, 2017 5:28 pm
Location: Langley, B.C., Canada

1980 Chevrolet Monza 2+2

Re: inner fender well ducts

Postby cjbiagi » Wed Jul 04, 2018 2:28 pm

If you are concerned about underhood heat I would consider some type of hood louver. There are a lot of louvers used on other cars that could be adapted to a stock hood. Since heat rises that would be the most logical solution. Also, don't underestimate the use of a air dam under the front of the car. This will create a low pressure area which will help allow air to flow from the engine compartment.
Clyde.........75 Monza 2+2
User avatar
cjbiagi
 
Posts: 8608
Joined: Sun Jun 25, 2006 2:37 pm
Location: Glenwood, Illinois

1975 Chevrolet Monza

Re: inner fender well ducts

Postby 67shovel » Thu Jul 05, 2018 8:00 am

I'm not sold on hood vents so much as I think the heat they bleed off will go into the interior floor vents through the slots at the base of the windshield. Wouldn't that heat get caught up in the high pressure area at the base of the windshield? That's why they put the vents there .....for your intrior air.
79 Monza wagon Pro street, cage tubs narrowed 9
73 GT Vega wagon street car 355 700r4 a/c
68 RS Z/28 302
67 SS 396
Cobra replica
65 Corvair Corsa midengine 301
http://pictures.sprintpcs.com/share.do? ... =RETRIEVED
67shovel
 
Posts: 310
Joined: Tue Jul 19, 2011 8:29 am
Location: Houston Tx

Re: inner fender well ducts

Postby Monza Harry » Thu Jul 05, 2018 4:04 pm

67shovel wrote:I'm not sold on hood vents so much as I think the heat they bleed off will go into the interior floor vents through the slots at the base of the windshield. Wouldn't that heat get caught up in the high pressure area at the base of the windshield? That's why they put the vents there .....for your intrior air.

Agreed! Front "Air-Dam" and even side skirts, will help pull air through the "Engine Bay". Wheel well area's can actually be a higher pressure area, Cars that are paying attention to "Aero" pull the leadin edge of the wheel house outwards and the trailing edge in as the air will sweep back in from the tire and brake/wheel and this then creates a wind dam at the trailing edge. If I remember correctly all that is needed at 200 MPH is about 1.5". Harry
I'm not a hoarder I'm a preservationist 78 Monza Spyder (~Soon(ish +/- I guess) To Be 2+2 with Spoilers)
User avatar
Monza Harry
 
Posts: 2568
Joined: Tue Oct 04, 2011 8:50 am
Location: Windsor ON Canada

1978 Chevrolet Monza 2+2


Return to Engine Tech

Who is online

Users browsing this forum: No registered users and 13 guests