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

Now available from EcoModder: ScanGauge II fuel economy gauge.  Click for details.  

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-08-2010, 08:19 PM   #1 (permalink)
EcoModding Lurker
 
ChopsQube's Avatar
 
Join Date: Jun 2010
Location: St Pete, FL
Posts: 54

Nissan Cube - '010 Cube Base
90 day: 33.35 mpg (US)

The BRG - '91 Miata SE
90 day: 35.9 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Pulsing and coasting...

Just a couple quick questions because I have a 6-speed manual transmission....

1) When you finish coasting, do you blip the throttle to "rev-match" or just ease out the clutch?

2) After coasting and you're back in gear with the clutch out, how much throttle do you use to get back up to speed?

I just want to be sure I'm doing this right instead of just wasting gas.

Many thanks in advance!


(Support Ecomodder.com & get rid of these annoying ads!)      
 
__________________
  Reply With Quote
Old 06-08-2010, 08:27 PM   #2 (permalink)
Master EcoModder
 
The Atomic Ass's Avatar
 
Join Date: Oct 2008
Location: Mason, OH
Posts: 498

2-Wheeled Mule - '06 Burgman 400
90 day: 84.89 mpg (US)

Max - '01 S-10 LS
90 day: 24.7 mpg (US)

Twin Powa - '05 Ninja 250
90 day: 79.09 mpg (US)

Ransom - '01 Bravada
90 day: 16.39 mpg (US)
Thanks: 9
Thanked 10 Times in 10 Posts
Send a message via Skype™ to The Atomic Ass
What your fillups return will be a great (if slow) indicator of success.
__________________

ASE certified day-dream engineer

I'm making beautiful music's now, hear it and like me on Facebook!
  Reply With Quote
Old 06-08-2010, 08:39 PM   #3 (permalink)
Left Lane Ecodriver
 
RobertSmalls's Avatar
 
Join Date: Aug 2008
Location: Buffalo, NY, USA
Posts: 2,236

Zombie Insight - '00 Insight MT
Team Honda
90 day: 62.82 mpg (US)
Thanks: 79
Thanked 240 Times in 174 Posts
1. It's better to blip the throttle to approximately rev match. It will save wear on the synchros.

2. There's no single answer, aside from accelerating at or near optimal engine efficiency. Wide throttle increases engine efficiency, but if you go too far, the ECU will enrich the fuel:air mixture. A ScanGauge is helpful here.
  Reply With Quote
Old 06-08-2010, 10:51 PM   #4 (permalink)
EcoModding Lurker
 
Turbo Dan-O's Avatar
 
Join Date: May 2010
Location: Middle TN
Posts: 21

Little Red - '93 Metro G10
Team Metro
90 day: 57.25 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Yea, speed matching will be better on your trans and clutch and also not slow you down any. As for throttle.....I am still trying to figure this out....

Dan-o
__________________
'93 Metro 3/5 FE project
'69 Chevelle 6.0
'65 Mustang I6 turbo/nitrous
'92 Silverado on the bottle
'85 SVO
'77 Taylor SS jet boat
http://ecomodder.com/forum/fe-graphs/sig4098a.png
  Reply With Quote
Old 06-08-2010, 11:51 PM   #5 (permalink)
EcoModding Lurker
 
ChopsQube's Avatar
 
Join Date: Jun 2010
Location: St Pete, FL
Posts: 54

Nissan Cube - '010 Cube Base
90 day: 33.35 mpg (US)

The BRG - '91 Miata SE
90 day: 35.9 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by RobertSmalls View Post
1. It's better to blip the throttle to approximately rev match. It will save wear on the synchros.

2. There's no single answer, aside from accelerating at or near optimal engine efficiency. Wide throttle increases engine efficiency, but if you go too far, the ECU will enrich the fuel:air mixture. A ScanGauge is helpful here.
Quote:
Originally Posted by Turbo Dan-O View Post
Yea, speed matching will be better on your trans and clutch and also not slow you down any. As for throttle.....I am still trying to figure this out....

Dan-o
I haven't been doing the rev-matching though I kept thinking that I should since that's what I've always done when down shifting. Now I know and will start my blipping again!

I do have a SGII and I know that if I keep the "LOD" down below 86 I will stay in closed loop mode. Through a little in-town driving today, I have managed to repeat my WOT LOD at 78 almost every time, if not just a tad below.

Thanks guys!
__________________
  Reply With Quote
Old 06-09-2010, 12:31 AM   #6 (permalink)
Pishtaco
 
SentraSE-R's Avatar
 
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,278

Clean Green Toaster Machine - '06 xB
90 day: 45.81 mpg (US)
Thanks: 39
Thanked 193 Times in 127 Posts
I barely kiss the clutch plates to start the engine. Then I rev match to pulse again. 83 LOD works well for accelerating in both my SE-R and xB. 83 LOD is moderate acceleration in the xB. It's spirited acceleration in the SE-R.


(Support Ecomodder.com & get rid of these annoying ads!)      
 
__________________
Darrell

Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.4 mpg avg over 30,375 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
Clean Green Toaster Machine
45.8 mpg over 2235 miles, 164% of '08 EPA
  Reply With Quote
Reply  Post New Thread

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
been playing with pulsing and coasting... olderthanme Hypermiling / EcoDriver's Ed 3 01-28-2008 09:32 AM




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2012, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com