Nissan Road Racing Forums

Go Back   Nissan Road Racing Forums > Universal Discussion > Composites Forum

Reply
 
Thread Tools Display Modes
  #61  
Old 05-06-2010, 07:42 PM
Def Def is offline
Budget Baller to the Max
 
Join Date: Dec 2007
Location: Houston, TX
Posts: 11,815
Send a message via AIM to Def
Default

My vented hood gave me about a 5-10 deg F coolant temp drop vs. a stock hood. It never gets over about 190-192 peak on track now.
__________________
'03 Honda S2000 - pretty much stock

'11 BMW X5 35i


DefSport Koni Sleeve and Spring Perch Buy!!!
http://www.nissanroadracing.com/showthread.php?t=5902
Reply With Quote
  #62  
Old 05-07-2010, 06:45 AM
Jonty Jonty is offline
Senior Member
 
Join Date: Mar 2010
Posts: 150
Default

Quote:
Originally Posted by Def View Post
My vented hood gave me about a 5-10 deg F coolant temp drop vs. a stock hood. It never gets over about 190-192 peak on track now.
cool thanks mate, that's a nice easily measured difference- I don't want to be messing around with fractions of a percent as the effort:gain ratio would be a bit disheartening...

What sort of ambients were that in? and what peak engine output by the way?
Reply With Quote
  #63  
Old 05-07-2010, 06:37 PM
Def Def is offline
Budget Baller to the Max
 
Join Date: Dec 2007
Location: Houston, TX
Posts: 11,815
Send a message via AIM to Def
Default

Ambients were about the same both days, highs of about 80-85 deg F(a very cool day in Texas!). It still seems like it'll keep the same temp even up into the 90's from the bit of playing around I've had with it now that it's hotter. In fact, the radiator cooling was so much better than I kept my corner light in front of my oil cooler(it's where the windshield washer reservoir used to be). Never had the need to expose it to direct airflow since the radiator was keeping the oil temps down about another 10-20 deg F as well(about 205-210 deg F to about 185-190 deg F).

Engine is an S13 redtop SR with a GT2876R at 14 psi(on track) with HKS Step 1 264/264 cams, so probably in the 290-300 rwhp range.
__________________
'03 Honda S2000 - pretty much stock

'11 BMW X5 35i


DefSport Koni Sleeve and Spring Perch Buy!!!
http://www.nissanroadracing.com/showthread.php?t=5902
Reply With Quote
  #64  
Old 05-08-2010, 07:31 PM
juggernaut juggernaut is offline
Member
 
Join Date: Dec 2009
Location: Australia
Posts: 90
Default

Here's an article on installing bonnet vents.......supporting Def's comments to place the vents closer to the front of the hood/bonnet as this is where the greatest pressure drop occurs.

http://autospeed.com.au/cms/A_2162/article.html
Reply With Quote
  #65  
Old 05-08-2010, 09:38 PM
stewiefied stewiefied is offline
Senior Member
 
Join Date: Nov 2009
Location: Milwaukee, WI
Posts: 251
Default

That is why I don't understand the hood hinge spacer fad. I see how it would cool the engine bay in stop-go traffic, but at an speed, it would just be bringing air into the bay. Maybe still cooling it? i don't know, either way it wouldn't be beneficial.
__________________
Reply With Quote
  #66  
Old 05-17-2010, 01:30 PM
McCoy McCoy is offline
Moderator
 
Join Date: Jun 2007
Location: Pullman, WA
Posts: 2,385
Default

Quote:
Originally Posted by Matt93SE View Post
Here's the guy I got those quotes from. they also have a S13 hood listed.

http://cgi.ebay.com/ebaymotors/NISSA...Q5fAccessories
So to recap, I contacted this seller and asked for a hood minus the extra support they add in for the latch and no layer of CF, just glass... paid $640 for a pair of them shipped to my house (one for Logger).

Just got back from the house, these things are LIGHT. I'll weight mine tonight, but it feels to be at 13-15 lbs! Quality is about on par with a sub $300 hood, I think once it's sanded up a bit and painted it'll look just fine. I can't comment on the fitment till I get it on, so more on that later.

Logger stopped by on his way back from the Wendover NT in Utah (luckily he was only 20 minutes behind the freight truck, total luck on his part) and was positive it was the lightest hood he's ever held for an S13.
__________________
-Monty
Reply With Quote
  #67  
Old 05-17-2010, 02:05 PM
a_ahmed a_ahmed is offline
Senior Member
 
Join Date: Nov 2007
Posts: 2,867
Default

that sounds excellent
__________________
"hexa-dodecahedron-triple-threaded-super-eleventy-way-adjustment-spec" dampers. -Def
Reply With Quote
  #68  
Old 05-17-2010, 07:18 PM
logr logr is offline
VIP Member
 
Join Date: Nov 2009
Location: Spirit Lake, NORTH Idaho
Posts: 959
Default

Weighs 13 lbs.
Haven't tried fitment yet.
Reply With Quote
  #69  
Old 05-18-2010, 05:40 PM
Def Def is offline
Budget Baller to the Max
 
Join Date: Dec 2007
Location: Houston, TX
Posts: 11,815
Send a message via AIM to Def
Default

Nice. I'd put some extra fiberglass strips in there to beef it up. An extra lb or two go a long way towards making sure the thing won't fly apart! The fiberglass mat they use isn't strong at all really.
__________________
'03 Honda S2000 - pretty much stock

'11 BMW X5 35i


DefSport Koni Sleeve and Spring Perch Buy!!!
http://www.nissanroadracing.com/showthread.php?t=5902
Reply With Quote
  #70  
Old 05-18-2010, 09:14 PM
Matt93SE Matt93SE is offline
Senior Member
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 5,891
Default

on that note, any pics yet? how would you rate the build quality of the thing? How's the structure? think it'll hold up to a 125mph draft?
I'm not too concerned about absolute appearance, as long as it looks OEM and don't fly off the car at 125, I'm happy.
__________________
Quote:
Originally Posted by SoSideways View Post
I don't care what color they are as long as they are LONG AND HARD.
'04 G35 Sedan 6MT- The DD
'96 240SX- The Track Toy
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

Forum Jump



Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
vBulletin Style by: kreativfantasy.com
www.nissanroadracing.com