Welcome to the North American Subaru Impreza Owners Club Tuesday August 22, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Subaru Models > Impreza Forum

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 05-11-2001, 07:02 AM   #1
Scooby Specialist
Member#: 4817
Join Date: Mar 2001
Chapter/Region: NESIC
Location: Albanyish, NY
Question Double-Clutching, Rev-Matching, and Gas Mileage?

In the quest for better gas mileage, I've had pretty good results using the "Drive like a gramma" method (in which I visualize there's a raw egg underneath my right foot, and if I push too hard I'll break it), but I haven't been able to get any sort of steady mileage readings because at least once a week I go out and have some fun on some back roads, and I usually wind up burning 1/8th of a tank of gas in 15 miles or so.

But, that's not why I'm posting. I'm pretty religious about double-clutching and matching revs when I downshift. It was something I picked up on my MR2 with shot synchros, and I hope that continuing to do so in my WRX will preserve the tranny for an extra few miles. But I've got to thinking: how much does all that extra throttle blipping affect my mileage? I was wondering if anyone had some ideas on the subject? I don't down-shift all too often (only when I need a lower gear, not when I'm coming to a stop-sign or the like), but I'm thinking it must have some affect, especially given the heft of the stock flywheel.

Any theories?

* Registered users of the site do not see these ads.
TimStevens is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-11-2001, 09:02 AM   #2
Scooby Specialist
Member#: 1055
Join Date: Mar 2000
Chapter/Region: MWSOC
Location: Romeoville, IL
2005 No legacy for u
It's a diesel


I think that once I learned to heel and toe downshift really well with my RS that my mileage seemed to drop.

Just coincidence, I think, but worth considering.

kyledooley is offline   Reply With Quote
Old 05-11-2001, 09:05 AM   #3
Scooby Specialist
Member#: 2817
Join Date: Nov 2000
Location: NYC and Troy, NY
2001 Impreza 2.5RS


I would say it's insignificant. I double-clutch all the time, and my mileage has stayed the same between non-double clutch days and double clutch days.

I know you were talking about your gas mileage not being so great at the meet, but I would think that it will get better as you break-in your car more. Also, consider making the car lighter somehow (i.e. get rid of backseats, use lighter wheels).
tmat3 is offline   Reply With Quote
Old 05-11-2001, 09:47 AM   #4
Scooby Specialist
Member#: 4817
Join Date: Mar 2001
Chapter/Region: NESIC
Location: Albanyish, NY

tmat, I'm always bitching about my mileage, and my job, and my pay...

I'm hoping things improve soon when I get some more miles on the car, and I've heard that switching to synthetic will help a bit (plan on doing that at my second oil change). Unfortunately, I can't find any light wheels that are good looking and cheap, not to mention durable...


TimStevens is offline   Reply With Quote
Old 05-11-2001, 10:09 AM   #5
Scooby Guru
Member#: 518
Join Date: Nov 1999
Chapter/Region: NESIC
Location: Trunkmonkey Racing
762 PGT Impreza L,
Silverado EXT, Yaris


Sean is offline   Reply With Quote

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
double clutching, rpm matching? skeletorr General Community 20 02-10-2010 07:19 PM
Rev matching and random torque Q AM5562 Newbies & FAQs 14 04-23-2008 02:18 AM
How to double clutch/ rev match? J Kehl Transmission (AT/MT) & Driveline 2 03-18-2005 10:20 PM
Double-Clutch + Rev-Matching GaTechWRX Transmission (AT/MT) & Driveline 25 05-23-2003 09:01 PM
WANT MORE HP AND GAS MILEAGE??? BrysImpreza Normally Aspirated Powertrain 7 02-26-2001 07:09 PM

All times are GMT -4. The time now is 03:20 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.