hood vents - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 09-25-2007, 02:37 PM   #1
Registered Member
 
lunarhighway's Avatar
 
Join Date: Dec 2006
Posts: 360
Country: United States
hood vents

in the spirit of trying to turn bad luck into an opportunity i was thinking about the following:

my hood got damaged in an accident i had last week although it's not too bad compared to the fender and the bumper. the right side is slightly deformed and the front right corner is rather bent with a lot of paint chipped off.

it could be straigtened with a little care but a "new" second hand hood shouldn't cost to much either and in order to restore to car to it's former glory it would need to be completely repainted either way.

however it might not be to hard to get my hands on a kadett GSI hood.

the GSI was a high performance versions of my car wich basically had the same body with a bigger engine. there was a spoiler on the back a different bumper/airdam and small sideskirts. but it also had air extraction vents in the hood. the best part is all these where not just for show but it was claimed they actually lowered the Cd from 0.32 to 0.30!
while the vents alone would only be responsible for a small fraction of this
they're resessed so it's unlikely they'll cause additional drag either and they're designed to improve airflow wich might enable a bigger grillblock.

the advantage also is that this would be a factory designed windtunnel tested setup. no mather how theoreticly sound some aeromods are, it's still a bit of a gamble. i couldn't really go wrong with this one. and i think technical inspection wouldn't make to much trouble as it's a stock part. in fact you'd barely notice when painted.

what do you think? could this have a positive effect on FE? would there be any measurable gains (combined with a bigger grillblock). or should i save myself the trouble and have everything repaired and painted in one go?
and would there be a downside to these things?
__________________

__________________

lunarhighway is offline   Reply With Quote
Old 10-01-2007, 05:55 AM   #2
Registered Member
 
oneinchsidehop's Avatar
 
Join Date: Aug 2007
Posts: 165
Country: United States
Quote:
Originally Posted by lunarhighway View Post
in the spirit of trying to turn bad luck into an opportunity i was thinking about the following:

my hood got damaged in an accident i had last week although it's not too bad compared to the fender and the bumper. the right side is slightly deformed and the front right corner is rather bent with a lot of paint chipped off.

it could be straigtened with a little care but a "new" second hand hood shouldn't cost to much either and in order to restore to car to it's former glory it would need to be completely repainted either way.

however it might not be to hard to get my hands on a kadett GSI hood.

the GSI was a high performance versions of my car wich basically had the same body with a bigger engine. there was a spoiler on the back a different bumper/airdam and small sideskirts. but it also had air extraction vents in the hood. the best part is all these where not just for show but it was claimed they actually lowered the Cd from 0.32 to 0.30!
while the vents alone would only be responsible for a small fraction of this
they're resessed so it's unlikely they'll cause additional drag either and they're designed to improve airflow wich might enable a bigger grillblock.

the advantage also is that this would be a factory designed windtunnel tested setup. no mather how theoreticly sound some aeromods are, it's still a bit of a gamble. i couldn't really go wrong with this one. and i think technical inspection wouldn't make to much trouble as it's a stock part. in fact you'd barely notice when painted.

what do you think? could this have a positive effect on FE? would there be any measurable gains (combined with a bigger grillblock). or should i save myself the trouble and have everything repaired and painted in one go?
and would there be a downside to these things?
If you have blocked your grill and there is no air entering through it you would have a low pressure area under the hood. Adding vents would suck air in rather than vent it out. This is only a pracitcal problem if the car is low enough to the ground or you have an air dam that create (at least small) ground effects. I'm guessing it'd make no difference at all... but it might look cool.

The bigger grill block might help though.
__________________
Mike
_______________________________________________

"If you want to save gas I suggest you permanently remove the drivers seat and steering wheel. That seems to help." -Oscar Halverson

oneinchsidehop is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
More graph options TnS Fuelly Web Support and Community News 17 08-12-2011 05:01 AM
Request for more detailed avg mpg graph danieljmick Fuelly Web Support and Community News 1 02-02-2010 12:13 PM
Learn how-to solder. civicduty_ Experiments, Modifications and DIY 13 04-20-2007 10:56 PM
Honda TPS Sensor Blowout! $15/ea Matt Timion For Sale 0 09-13-2006 09:09 PM
Engine Temp vs MPG JanGeo General Fuel Topics 7 05-12-2006 10:16 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 05:13 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.