SV650.org - SV650 & Gladius 650 Forum



Idle Banter For non SV and non bike related chat (and the odd bit of humour - but if any post isn't suitable it'll get deleted real quick).
There's also a "U" rating so please respect this. Newbies can also say "hello" here too.

View Poll Results: Which uses more fuel?
Engine braking 7 41.18%
clutch in and use brakes 10 58.82%
Voters: 17. You may not vote on this poll

Reply
 
Thread Tools
Old 17-11-08, 01:19 PM   #11
jimmy__riddle
Guest
 
Posts: n/a
Default Re: Which uses less fuel?

some mixed answers!

I should add its not about me penny pinching, not fussed about that at all. i was just wondering from a engineering/science point of view.
  Reply With Quote
Old 17-11-08, 01:21 PM   #12
yorkie_chris
Noisy Git
Mega Poster
 
yorkie_chris's Avatar
 
Join Date: Apr 2007
Location: Halifax/Leeds
Posts: 26,645
Default Re: Which uses less fuel?

The answer is a massive "it depends"
__________________
Currently Ex Biker
Now rebuilding a 63' fishing trawler as a dive boat
yorkie_chris is offline   Reply With Quote
Old 17-11-08, 01:24 PM   #13
jimmy__riddle
Guest
 
Posts: n/a
Default Re: Which uses less fuel?

yeah i thought it might, the vehicles we were originally talking about were a 2.5TD L200 and a 2.2 petrol (carbed) Hilux.
  Reply With Quote
Old 17-11-08, 01:27 PM   #14
yorkie_chris
Noisy Git
Mega Poster
 
yorkie_chris's Avatar
 
Join Date: Apr 2007
Location: Halifax/Leeds
Posts: 26,645
Default Re: Which uses less fuel?

Well a standard (not common rail) diesel has fuel flow proportional to engine speed and throttle position. So not much difference.
__________________
Currently Ex Biker
Now rebuilding a 63' fishing trawler as a dive boat
yorkie_chris is offline   Reply With Quote
Old 17-11-08, 02:02 PM   #15
startrek.steve
Guest
 
Posts: n/a
Default Re: Which uses less fuel?

Quote:
Originally Posted by jambo View Post
If all else fails, fit a Sid Squid, annoyingly this makes more difference to fuel economy than anything else I've tried.

Jambo
Whats a sid squid?
  Reply With Quote
Old 17-11-08, 02:03 PM   #16
yorkie_chris
Noisy Git
Mega Poster
 
yorkie_chris's Avatar
 
Join Date: Apr 2007
Location: Halifax/Leeds
Posts: 26,645
Default Re: Which uses less fuel?

Who's got that .gif of him with the lightbulb on his head?!?
__________________
Currently Ex Biker
Now rebuilding a 63' fishing trawler as a dive boat
yorkie_chris is offline   Reply With Quote
Old 17-11-08, 02:04 PM   #17
Biker Biggles
Member
Mega Poster
 
Biker Biggles's Avatar
 
Join Date: Jan 2005
Location: Barnet Herts
Posts: 5,071
Default Re: Which uses less fuel?

Its a sort of automatic pilot that drives your vehicle around without using any fuel.
We should market it really.
__________________
On a clear day we stand there and look further than the ordinary eye can see.
Biker Biggles is offline   Reply With Quote
Old 17-11-08, 02:08 PM   #18
Daimo
Guest
 
Posts: n/a
Default Re: Which uses less fuel?

As said, when an engine is idling, its still using a lot of fuel to turn the engine over.

When using engine braking, the momentum is still turning the engine and not forcing any fuel in.

Our VXR does 0.2mpg when on idle, but you leave it in 6th and slow down it'll ratain max of 999.99 (therotically, no fuel used at all).
  Reply With Quote
Old 17-11-08, 02:14 PM   #19
breakz187
Guest
 
Posts: n/a
Default Re: Which uses less fuel?

I thought that the engine braking causes the vacumn to build up massively, reducing the amount of pressure within the fuel pressure regulator. I thought this was how it worked on injected petrol engines anyway. Obviously the injectors will have different control logic but i dunno...
  Reply With Quote
Old 17-11-08, 02:16 PM   #20
yorkie_chris
Noisy Git
Mega Poster
 
yorkie_chris's Avatar
 
Join Date: Apr 2007
Location: Halifax/Leeds
Posts: 26,645
Default Re: Which uses less fuel?

Depends if it's a 2port reg or 3port ... compensated or not... (obv a 3port won't be compensated...) Basically ECU logic can cut fuel flow entirely on the overrun if programmed to do that.
__________________
Currently Ex Biker
Now rebuilding a 63' fishing trawler as a dive boat
yorkie_chris is offline   Reply With Quote
Reply


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
Fuel @ the NEC Bassman SV Talk, Tuning & Tweaking 4 19-11-07 12:24 PM
Not Fuel, so who else is there? Berlin Exhausts 7 05-09-07 04:11 PM
Replacement fuel light / fuel tap riktherider SV Talk, Tuning & Tweaking 7 14-05-07 06:41 PM
Dry fuel BURNER SV Talk, Tuning & Tweaking 8 18-11-05 05:09 PM
Fuel cap? Bikerz SV Talk, Tuning & Tweaking 3 06-06-05 08:46 PM


All times are GMT. The time now is 09:21 AM.


Powered by vBulletin® - Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.