Scan gauge and vacuum gauge on Suzuki Swift

[TheDevenrocks]

Where do you plug it up to? Pretty interesting in it. Does it work good?

[jomelmaldonado]

@TheDevenrocks Well the scan gauge is connected to the OBD II port, and the vacuum gauge is connected to a vacuum source, after the throttle. Both works fine, I moved them to a Toyota Echo, since I changed the car.

[jasonlava]

How exactly do you hypermile with a vacuum gauge?

[jomelmaldonado]

Thanks for asking. The vacuum gauge is used as an indicator of engine load. When you approach wide open throttle, the vacuum collapse to zero. In idle it should be near 25. Part throttle should fluctuate depending on the engine load vs. throttle angle. The idea is to drive with the vacuum nearest to 25. This makes you practice to perfection. Plus the Scanguage II help giving instantaneous MPG read out. For more info, google search for ecomodder. This site has tons of info.

[jasonlava]

Thanks!

[thewhitenight]

@jomelmaldonado hi, so what is the best method of hypermiling? ive been trying to figure it out for the past 3 years by changing habits slightly and religiously recording mpg's. is it just, use as little throttle as necessary, and cruise control at 55? or do i use the revs a little bit to follow the torque curve? thx!

[jomelmaldonado]

Hi, thanks for watching the video. Not every car has the same optimum speed, it depends on the engine, transmission and vehicle aerodynamics. The vacuum gauge give you instantaneous engine load, the scan gauge determines average MPG in a given distance. Additionally any engine operates efficiently when the piston speed is 5 to 6 m/s. Depending on the engines stroke, it will vary, but mainly from 1700-2100 RPM. I could help you out with the formulas if you know the stroke of the piston.

[thewhitenight]

@jomelmaldonado thx for the fast reply! i took your numbers and googled a piston speed calculator and it gave me 1700-2000 rpm would be best for my 5sfe camry. im usually driving city, does that mean i should keep my range near there, like let it shift at a max of 2000 rpm or shift above that so it averages ~2000 rpm? thx again!

[jomelmaldonado]

If it's a manual, I would shift before reaching 2000 RPM when driving in leveled roads. Apparently anything above the 2000 RPM will be wasted fuel. I suppose it has to do with the rate at which the fuel is expanding during the power stroke. It expands at that speed of 5 to 6 meter per seconds. If you try to go faster than the expansion speed, that expansion will be slower than the piston movement, not contributing to the downward movement any more. If it's automatic, there is not much options.

[6478225]

@jomelmaldonado There is 'LOD' option in scan guage that shows load on engine, why not to use that instead of vaccum guage?

[jomelmaldonado]

Hello and thanks for watching, the scan gauge can display engine load, but the refresh rate is slower than a mechanical vacuum gauge, so I prefer the vacuum gauge, but in fact, it could be possible to try to drive based on engine load by watching the scan gauge, if you don't mind the one second delay of the display.

[6478225]

@jomelmaldonado Thanks for reply, you know you can change the scan gauge update rate? you can go to MORE>MORE>RATE option, it has three settings of SLOW, NORMAL and FAST. Anyways thanks a lot....