Go Back   EcoModder Forum > EcoModding > Hypermiling / EcoDriver's Ed
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-17-2008, 03:51 AM   #11 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: PA
Posts: 16

Miata - '93 Mazda Miata
90 day: 34.79 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by meemooer View Post
I think it's all about how comfortable you are behind them
A persons comfort level and safe distance can be 2 different areas.
You should factor in your overinflated tires and remember that your braking distance will be longer(slower to a stop) than properly inflated tires.

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-17-2008, 04:03 AM   #12 (permalink)
VIVA LA MPG RESISTANCE
 
Will's Avatar
 
Join Date: Mar 2008
Location: Brownsville, Tn
Posts: 328

Meat-roll - '97 Geo Metro
Team Metro
90 day: 55.4 mpg (US)

Wife's Brruik - '03 Buick Century
90 day: 30.84 mpg (US)

Blue Balt - '08 Chevrolet Cobalt XFE
Team Chevy
90 day: 38.19 mpg (US)
Thanks: 0
Thanked 3 Times in 3 Posts
I think that you kind of touched a spot here, but I believe the answer to your question will only come with you trying both ways. I know that with my Metro I get better at 55 without drafting than 60 or more drafting, but that could just be because over 55 winds my RPMs up so much.
  Reply With Quote
Old 07-17-2008, 04:41 AM   #13 (permalink)
EcoModding Apprentice
 
Join Date: Jul 2008
Location: North Carolina
Posts: 124

6th Gen Coupe - '02 Honda Accord EX 4 cyl
90 day: 28.01 mpg (US)

Zombie Accord - '98 Honda Accord EX
90 day: 24.71 mpg (US)

Ol' Red - '96 Ford F-150 XL
90 day: 14.43 mpg (US)
Thanks: 0
Thanked 10 Times in 6 Posts
Get a scangauge and see.
__________________
  Reply With Quote
Old 07-17-2008, 05:38 AM   #14 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: Texas
Posts: 12

stang - '90 Ford Mustang LX
90 day: 27.46 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
I would love to try the scangauge but my car is obd1. I have been considering a vacuum gauge, but I don't think that would help us in this situation anyway. Thanks anyways guys. Maybe I'll just try both over the next few months and see how it works out.
  Reply With Quote
Old 07-17-2008, 08:14 AM   #15 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location: ÿ
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
Quote:
Originally Posted by WheresMyGas View Post
remember that your braking distance will be longer.
I don't believe that is a correct statement. Do you have a source?
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 07-17-2008, 08:15 AM   #16 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location: ÿ
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
Quote:
Originally Posted by Bakerboy View Post
I would love to try the scangauge but my car is obd1. I have been considering a vacuum gauge, but I don't think that would help us in this situation anyway. Thanks anyways guys. Maybe I'll just try both over the next few months and see how it works out.
The scangauge plain won't work out on your obd1 car. Build ye an MPGuino
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 07-18-2008, 03:56 AM   #17 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: PA
Posts: 16

Miata - '93 Mazda Miata
90 day: 34.79 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by dcb View Post
I don't believe that is a correct statement. Do you have a source?
All the tests I see so far only go up to 35psi. I believe overinflated tires(over max sidewall) would have a longer braking distance because of the smaller contact patch to grip the road.

Do you have a reliable source for your disbelief?
This is all I could find for now
http://www.rma.org/tire_safety/tire_...ips/summer.cfm
http://www.edmunds.com/advice/fuelec...0/article.html
__________________

Last edited by WheresMyGas; 07-18-2008 at 04:18 AM..
  Reply With Quote
Old 07-18-2008, 09:49 AM   #18 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location: ÿ
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
Show me some test data (not editorial hogwash) to back up your asserion, i.e.:

__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 07-18-2008, 10:24 PM   #19 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: PA
Posts: 16

Miata - '93 Mazda Miata
90 day: 34.79 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
I've read it and Im confused that in autocross people don't set their tire pressure higher than a few psi since they would love maximum braking to improve their times.

It is measuring traction but "gradual braking" is not used to stop as fast as you can(neither is immidiate braking which would induce a skid). Looks like barry the tire expert isn't fully convinced either.
Barry's Tire Tech

"Dry Braking & Wet Braking:
Both of these tests were conducted using a traction trailer – pulled behind a truck. A brake is gradually applied to the test position on the trailer until the tire locks up and instrumentation on the axle measures the peak torque and then the stabilized slide value. For the wet portion of the test, water is sprayed on the ground in front of the tire at a prescribed rate. This generates a consistent water depth. This is a common way to conduct traction testing.

These results are a surprise to me. Given the results of the wear test, I would have expected the traction values to peak at some pressure and then drop. Perhaps it is the nature of the braking test and perhaps a different set of values would have been obtained if a test had been conducted on a circular skid pad using a vehicle – but they didn’t do that, so we don’t know."
__________________
  Reply With Quote
Old 07-18-2008, 10:44 PM   #20 (permalink)
Ecoformance Engineer
 
Vince-HX's Avatar
 
Join Date: Jun 2008
Location: Arizona
Posts: 239

EJ7 - '96 honda civic Hx
Last 3: 58.02 mpg (US)
Thanks: 0
Thanked 3 Times in 3 Posts
Quote:
Originally Posted by Bakerboy View Post
I would love to try the scangauge but my car is obd1. I have been considering a vacuum gauge, but I don't think that would help us in this situation anyway. Thanks anyways guys. Maybe I'll just try both over the next few months and see how it works out.
I run a vacuum gauge and I can pull the same amount going 10mph faster when i'm drafting @ a safe distance. Its not worth it for me because of the rocks and such that get kicked into your windshield.

__________________

70 mpg or die modding

www.full-race.com

Quote:
Originally Posted by MetroMPG View Post
looking forward to seeing what kind of uber-sipper slinks out of the full race skunkworks.
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com