RedM Posted July 7, 2009 Share Posted July 7, 2009 Don't stick it in sixth at 30mph. I think I once read that stuff like that means that fuel gets chucked into the engine in ordeer to prevent stalling. Quote Link to comment Share on other sites More sharing options...
martini Posted July 7, 2009 Share Posted July 7, 2009 I think I once read... This is the issue here... we haven't got anything concrete. We need someone that knows this stuff to pass on the knowledge. It's odd that there aren't most sites dedicated to this issue. Quote Link to comment Share on other sites More sharing options...
Kranz Posted July 7, 2009 Share Posted July 7, 2009 http://www.ecomodder.com I get 78mpg out of my Focus on a long run! Yes, I'm a novice hypermiler Quote Link to comment Share on other sites More sharing options...
RedM Posted July 7, 2009 Share Posted July 7, 2009 (edited) This is the issue here... we haven't got anything concrete. We need someone that knows this stuff to pass on the knowledge. It's odd that there aren't most sites dedicated to this issue. I don't really care TBH. I go weeks and hundreds of miles between visits to the fuel station. My idea of a cost-saving drive is finding a free parking space. Edited July 7, 2009 by RedM (see edit history) Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 7, 2009 Author Share Posted July 7, 2009 Driving slower is not necessarily more fuel-economical. Manufacturers often say at what speed and in what gear the engine is most efficient: for a petrol car this is usually around 2500rpm in top gear.. Don't stick it in sixth at 30mph. I think I once read that stuff like that means that fuel gets chucked into the engine in ordeer to prevent stalling. Thats exactly the question i was intending to raise guys... ...basically driving slow and keeping the revs VERY low.....i was thinking maybe that actually causes the car to use MORE fuel ... Quote Link to comment Share on other sites More sharing options...
martini Posted July 7, 2009 Share Posted July 7, 2009 Having your foot to the floor in really low revs in 6 can't save that much fuel compared to gentle acceleration in 2nd or 3rd...? I have bugger -all knowledge about combustion engines and gear strains on fuel loads etc... Quote Link to comment Share on other sites More sharing options...
Kranz Posted July 7, 2009 Share Posted July 7, 2009 Ideally you want to keep the engine speed low (lower friction) in the highest gear possible for the speed without lugging the engine down too much. In my diesel focus it will pull from 1000rpm but I only accelerate slowly while watching the fuel economy readout. I try to accelerate at above 40mpg if there's nobody behind me. Typically I change up at around 1500rpm which drops the revs in the next gear into the 1000 range. Accelerate slowly Anticipate slowing down and come off the throttle well before you have to slow down allowing the engine to brake the car (uses no fuel at all). Anticipate traffic lights so you reach a red light just as its turning green and the traffic that was stopped has accelerated to your speed when you reach it Don't brake unless you need to (brakes are just energy wasters), so this means keep your cornering speeds up. Once you reach a speed (around 50 is best for most cars) then stay at that speed and don't move the throttle. i.e. No accelerating and decelerating. When coming up to a hill keep the accelerator pedal in the same position and let the speed drop off, then as you reach the top and go down hill allow it to accelerate to your chosen speed then come right off the pedal. Accelerate downhill, not up hill.... if you need to accelerate! Keep tyre pressures high. I run mine at 50 psi Drafting behind trucks too close is dangerous! But there is a good benefit to be had at the legal 2 second gap too. Some hypermilers use EOC (Enginr Off Coasting). This is illegal and removes the power steering and braking. Not at all advisable! Coasting out of gear is not as bad as EOC but still not legal. See the ecomodder website for more info. Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 7, 2009 Author Share Posted July 7, 2009 Ideally you want to keep the engine speed low (lower friction) in the highest gear possible for the speed without lugging the engine down too much. In my diesel focus it will pull from 1000rpm but I only accelerate slowly while watching the fuel economy readout. I try to accelerate at above 40mpg if there's nobody behind me. Typically I change up at around 1500rpm which drops the revs in the next gear into the 1000 range. Accelerate slowly Anticipate slowing down and come off the throttle well before you have to slow down allowing the engine to brake the car (uses no fuel at all). Anticipate traffic lights so you reach a red light just as its turning green and the traffic that was stopped has accelerated to your speed when you reach it Don't brake unless you need to (brakes are just energy wasters), so this means keep your cornering speeds up. Once you reach a speed (around 50 is best for most cars) then stay at that speed and don't move the throttle. i.e. No accelerating and decelerating. When coming up to a hill keep the accelerator pedal in the same position and let the speed drop off, then as you reach the top and go down hill allow it to accelerate to your chosen speed then come right off the pedal. Accelerate downhill, not up hill.... if you need to accelerate! Keep tyre pressures high. I run mine at 50 psi Drafting behind trucks too close is dangerous! But there is a good benefit to be had at the legal 2 second gap too. Some hypermilers use EOC (Enginr Off Coasting). This is illegal and removes the power steering and braking. Not at all advisable! Coasting out of gear is not as bad as EOC but still not legal. See the ecomodder website for more info. thanx mate But... 50 PSi what size rims is that on? do you know what PSi my 18's should be pls? Quote Link to comment Share on other sites More sharing options...
Kranz Posted July 7, 2009 Share Posted July 7, 2009 That's my Focus mate, and the handling does deteriorate a bit, plus the suspension is now hard! 50 is the max tyre sidewall pressure rating. There's an increased risk of punctures, hopwever tyre wear is reduced! I wouldn't recommend it in a Supe at all! Stick to the manufacturer recommended maximum pressures only. Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 7, 2009 Author Share Posted July 7, 2009 ok cheers. so what is that for an 18" tyre mate do u know? Quote Link to comment Share on other sites More sharing options...
Kranz Posted July 7, 2009 Share Posted July 7, 2009 Nope, the Supra wasn't made with an 18" but I'd hazard a guess its the same as a 17" recommended pressure Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 7, 2009 Author Share Posted July 7, 2009 34psi should be ok then all round? Quote Link to comment Share on other sites More sharing options...
Kranz Posted July 7, 2009 Share Posted July 7, 2009 I expect that will be fine If its economy you want tho, but a Smart diesel Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 7, 2009 Author Share Posted July 7, 2009 - i wouldn't get my legs in one of those!!!!! Quote Link to comment Share on other sites More sharing options...
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