19bonestock88's 2004 Saturn "Ion Green Line" build...

[19bonestock88]

So I did a big road trip with a revised version of the diffuser. Getting onto the highway last week the front mount failed and it fell down at speed, so I had to repair it and I extended it to the axle to prevent air getting under it. Results are astounding. I cruise at 60mph, now between 10.2 and 11.4% throttle and showing between 20 snd 23% load. Instant mileage is between ~54mpg (11.4% throttle) and ~61mpg (10.2% throttle). I also removed the spare and equipment and cut out some excess metal from the trunk lid, bringing weight to an estimated 2585lb

Making progress indeed!

EDIT: I did reattach the outer plastic and my spoiler after the cutting

[Ecky]

Pretty fantastic economy. Our gearing in top gear is nearly identical, but I think you're edging me out in economy, despite my car having a 600lb advantage and the G1's incredible base Cd.

I'll have to see when things warm up, but this time last year I was seeing ~49-54mpg @ 60mpg on nice days. I've made a few small changes which should improve that, but... yeah.

[19bonestock88]

To be fair I’m not certain my UltraGauge is reporting accurate data. On the road trip I took I was averaging 140-160mi to the quarter tank which works out to be in the ~50mpg range roughly. I need to fix or bypass my evap vent valve so I can get consistent fills and start calculating mileage again

[me and my metro]

I like your ramps, if you can straddle two blocks you can crawl under.

[19bonestock88]

Originally Posted by me and my metro

I like your ramps, if you can straddle two blocks you can crawl under.

That move got me banned from working on my car at my apartment lol

My landlord/property manager is an infinite prick

[Ecky]

I'd be interested to see your tank numbers. Is your speedometer accurate? If you get into tuning, be aware that an Ultragauge won't be anywhere near accurate because it doesn't take changes to AFR into account.

Even with evap in place, it all averages out in the end. All of it ends up burnt, even if one tank might read a little high and the next a bit low.

[19bonestock88]

Originally Posted by Ecky

I'd be interested to see your tank numbers. Is your speedometer accurate? If you get into tuning, be aware that an Ultragauge won't be anywhere near accurate because it doesn't take changes to AFR into account.

Even with evap in place, it all averages out in the end. All of it ends up burnt, even if one tank might read a little high and the next a bit low.

I’ve added 5% to my trip meter when I was calculating mileage due to my tires being ~5.3% taller than stock. 60mph indicated is 63 actual

[ME_Andy]

Cool. I should stop being lazy and make something like that.

[19bonestock88]

Originally Posted by ME_Andy

Cool. I should stop being lazy and make something like that.

I had been telling myself that for months

[cRiPpLe_rOoStEr]

Originally Posted by 19bonestock88

That move got me banned from working on my car at my apartment lol

Living in apartment has its downsides.