• MPG maximizing - My new ZX2 project
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Re: MPG maximizing - My new ZX2 project
Reply #15 on: July 08, 2009, 07:13:53 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
the original s/r is a sorry sight - one sideswipe due to a parking lot hit and run, followed up with an attempt by a mobile body shop to fix, combined with the last hit by a woman with a mexican d/l driving a navigator who decided to make the right hand turn as i was making a left on a green arrow from the other direction. add infrequesnt car washes and a 4 year hiatus sitting in my driveway, and a set of scion steelies on the rear with drag radials on the front and you get the picture...

anyways, back to the mpg thing... here's a map of my eco-cruise trip if anyone cares to see. elevation changes from 1600ft to 300ft above sea level... copy and paste the full text

http://www.mapquest.com/maps?1c=Corona& ... ress::1/l::[20100-20499]+Box+Springs+Rd:Riverside:CA:92507:US:33.9475:-117.30195:street:Riverside+County:1/l::[2890-2913]+la+Sierra+Ave:Riverside:CA:92503:US:33.88945:-117.46475:street:Riverside+County:1/l::30000+Rancho+California+Rd:Temecula:CA:92591-2964:US:33.50752:-117.140099:address:Riverside+County:1/m:hyb:7:33.746017:-117.343978:0:::::/io:1:::::f:EN:M:/e
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


  • krux303
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Re: MPG maximizing - My new ZX2 project
Reply #16 on: July 09, 2009, 01:31:33 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
dang that looks like a fun drive but man does it go down quick on sea level. Does your ears pop all the time hahah?
skate42112: a regular slap to the face is not manly but yet a backhand to the face shows great power


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Re: MPG maximizing - My new ZX2 project
Reply #17 on: July 11, 2009, 06:08:09 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
naw - its only 1600 ft - Cajon pass at 4190ft on the 15 north is the ear popper...
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


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Re: MPG maximizing - My new ZX2 project
Reply #18 on: July 17, 2009, 07:15:56 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
Another update...

Run 7: Upped the air in the tires to 40psi, added Ford Racing Wires and new Motorcraft plugs gapped at .055" and I netted the same 37.5mpg... I should have seen an improvement but i think the low temp thermostat might be fighting my mpg cause. i'm going to change out the 170 t'stat for a 180 t'stat and see if that helps the cause. The car is running great, lots of off the line grunt.

Rob
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


Re: MPG maximizing - My new ZX2 project
Reply #19 on: July 17, 2009, 07:47:13 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
Have you tried smaller plug gaps? I recently replaced my fuel filter and replaced the plugs with some oe .05 gap plugs and I'm seeing 40+ mpg's highway w/ NGP0 on 93 octane


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Re: MPG maximizing - My new ZX2 project
Reply #20 on: July 17, 2009, 09:26:06 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
typically larger gaps give greater results, since that increases the firing voltage. 40+ mpg sounds great, but if you don't actually see the fuel in the filler neck between fills you really won't know if thats an accurate number, since one can dribble feed up to 2 gallons of fuel after the pump clicks off.

rob
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


Re: MPG maximizing - My new ZX2 project
Reply #21 on: July 17, 2009, 10:06:31 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
yeah I realize that, my method isnt super accurate and around 32 was what i got with the atx, but doing this even with mostly 70mph hiway driving i got those #'s, I was impressed especially with the 98mtx's shorter fifth gear


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Re: MPG maximizing - My new ZX2 project
Reply #22 on: July 17, 2009, 10:16:02 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
what size tire was on the car?

you should try filling the neck between fills and see what you're getting... it would be valuable info to see where you might be at.
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


Re: MPG maximizing - My new ZX2 project
Reply #23 on: July 17, 2009, 11:07:13 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
205/40/17
40 psi i think


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Re: MPG maximizing - My new ZX2 project
Reply #24 on: July 19, 2009, 07:47:53 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
well your speedo/odo should be accurate then for testing since 205/40-17 has the same diameter as the stock 185/60-15's.
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


Re: MPG maximizing - My new ZX2 project
Reply #25 on: July 19, 2009, 09:57:16 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
it started with the 14 alloys in my case:)
but yes still accurate


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Re: MPG maximizing - My new ZX2 project
Reply #26 on: July 20, 2009, 10:02:13 AM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
Hmm I wounder if that T-stat is having a issue with open loop and closed loop and not gaining you better results.
skate42112: a regular slap to the face is not manly but yet a backhand to the face shows great power


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Re: MPG maximizing - My new ZX2 project
Reply #27 on: July 20, 2009, 01:35:58 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
no open closed loop issues - but if the pcm reads a coolant temp less than 175 degrees foran extended length of time then it will throw a code and light up the Service Engine Soon lamp.

rob
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


  • zonker
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Re: MPG maximizing - My new ZX2 project
Reply #28 on: August 21, 2009, 03:32:10 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
well - back to the topic at hand... the MPG project car...

I sold the car to a work buddy who needed a commuter car for work. I told him I have a couple other small items to do to the car before I hand over the keys.

I seemed to have hit a plateau at 37.5mpg so I tried adding a 180 thermostat to replace the 170 I had previously installed, and added a ZXtuner upper intake tube and larger TB elbow to the stock intake, as well as a MAC air filter (think K&N drop in filters). Still around the same number.

So... I've decided to add 19 lb injectors to the car and see if perhaps I'm running too lean to begin with. I hope to do the run in the next couple of days. I already installed the injectors and the car did pick up a little more balls so I may be on to something here :)

Rob
http://http://www.zxtuner.com
1999 ZX2 S/R (stock and back on the road!)
1999 ZX2 S/R (Performance Parts project car) - Ticket magnet
1998 ZX2 Base (MPG project car) - 38.6 mpg  - SOLD
2000 ZX2 A/T (daughters car) - not totalled yet lol


Re: MPG maximizing - My new ZX2 project
Reply #29 on: August 21, 2009, 06:52:07 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
aren't stock injectors 19 lb?