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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-22-2008, 10:50 PM   #1 (permalink)
Box Dreamer
 
Join Date: Jul 2008
Location: Pittsburg, CA
Posts: 154

xB Commuter - '04 Scion xB
90 day: 40.76 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
How to restart the engine by clutch smoothly?

I start EOC today and try to restart the engine by clutch. It is difficult to restart the engine smoothly. I tried different gears to pop, but the process is still rough. Anyone has a good advise?

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-23-2008, 07:07 AM   #2 (permalink)
Boxhead
 
whokilledthejams's Avatar
 
Join Date: May 2008
Location: Fredonia, NY
Posts: 322

Boxy Brown - '04 Scion xB
90 day: 35.48 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Send a message via AIM to whokilledthejams
I don't bump-start all the time, but when I do, I try to be doing about 25-30mph, and bump start it in 5th. That way, when it does fire up, the revs don't climb really high. Also, as soon as the engine fires up, I disengage the clutch again, because at that point, I'm generally stopping anyway (if you saw my extremely low-traffic commute, this would make more sense).

Someone else here wrote up a much more elaborate, and probably better, bump-start technique, but I can't recall who that was.
__________________
  Reply With Quote
Old 07-23-2008, 08:40 AM   #3 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)

Daox's Volt - '13 Chevrolet Volt
Thanks: 2,501
Thanked 2,585 Times in 1,553 Posts
http://ecomodder.com/forum/showthrea...gine-1141.html
__________________
Current project: A better alternator delete
  Reply With Quote
Old 07-23-2008, 02:21 PM   #4 (permalink)
Box Dreamer
 
Join Date: Jul 2008
Location: Pittsburg, CA
Posts: 154

xB Commuter - '04 Scion xB
90 day: 40.76 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the link. I tried this morning and I can tell the big difference. Now, the engine restarts like a hybrid, very smoothly and unnoticed.
__________________
  Reply With Quote
Old 07-23-2008, 06:38 PM   #5 (permalink)
EcoModding Apprentice
 
greenitup's Avatar
 
Join Date: May 2008
Location: connecticut
Posts: 129

Truck - '97 Ford Ranger
90 day: 30.32 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
when i first started it was rough but i have gotten better. just takes a bit of practice and the right gear.
__________________
  Reply With Quote
Old 07-29-2008, 09:14 PM   #6 (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
I give it a little bit of gas and let out on the clutch in whatever gear is appropriate for the given speed. I have tried this on Troy, the Geo, and the Festiva, and none of them have given me any troubles. When I pull out of my downhill/mountain drive way, I start the car using a bump start... so the engine is completely cold... still with no problems.

I'm not sure how to follow the information in the guide. It says to bump start in a higher gear than is appropriate for a given speed... well, for me, I shift at such low speeds it is probably already inappropriate to start up in that gear. For example, at 20 mph I am already in 4th gear. So should I be starting up in 5th? And regarding the extra engage/disengage... isn't this just causing extra wear and tear on the clutch? Is this really necessary if the car is already starting up with out a lot jarring?

__________________

Last edited by atomicradish; 07-29-2008 at 09:20 PM..
  Reply With Quote
Reply  Post New Thread


Tags
bump starting, clutch starting

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric car conversion: Project ForkenSwift MetroMPG Fossil Fuel Free 1041 07-28-2014 09:19 AM
How to smoothly bump start / clutch start an engine MetroMPG Hypermiling / EcoDriver's Ed 76 03-22-2014 07:52 AM
Coasting experiment: engine on VS engine off on a fixed route = 12.9% gain MetroMPG Hypermiling / EcoDriver's Ed 6 02-22-2008 08:38 AM
DIY decel fuel cutoff; alternator regulation; auto start/stop MetroMPG EcoModding Central 0 11-29-2007 02:04 PM
Basic EcoDriving Techniques and Instrumentation SVOboy Instrumentation 2 11-17-2007 11:38 AM



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