miataturbo.net-like debauchery thread (about the ND or something) - Page 130 - Miata Turbo Forum -Boost cars, acquire cats.

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Old 05-24-2016, 07:05 PM   #2581
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Originally Posted by aidandj View Post
How does it do flex fuel without a sensor?
SAAB was doing it without a sensor back in 2004ish.

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Its kinda neat how it determines the mix, heres how I understand it. When the ECU sees that there has been a "refueling event" (i think its more than 10 liters according to the MIU) it forces a re-adapt cycle. During the first few minutes of driving the ECU determines with the o2 sensor the amount of correction require to achieve lambda=1, and basically it can just figure out the ethanol content from that info. Thats being overly simplified I'm sure, but thats the basic idea, theres no flexfuel sensor like most flexfuel cars, so no extra sensors to go wrong, an excellent solution IMHO.
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SAAB does it the easy way. There is Multiple maps (t7) one for gasoline and one for e85, and calculated on Mass Air Flow and Lambda the car know the percentage of ethanol in the tank. This works amazingly good and even at -20-degres celsius the car starts like normal...
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Old 05-24-2016, 07:06 PM   #2582
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Interesting.
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Old 05-24-2016, 07:07 PM   #2583
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That's because SAAB was friggin' BAUCE.
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Old 05-24-2016, 07:19 PM   #2584
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Quote:
Originally Posted by aidandj View Post
How does it do flex fuel without a sensor?
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Originally Posted by EO2K View Post
Bro, it just knows
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Originally Posted by codrus View Post
Cameras and LTE. It watches you add fuel from the pump and looks up the specs on the gas company web site.

--Ian
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Originally Posted by mgeoffriau View Post


Quote:
Originally Posted by Joe Perez View Post
As we all know, fuel blending specs vary by season.

The ASTM spec permits E85 to be as as low as E70 during winter, but requires a minimum of 79% alcohol for Class 1 during summertime.

http://www.cleanairchoice.org/pdf/Ethanol%20Specs.pdf

http://ethanolrfa.3cdn.net/4eea401b7..._nrm6bhv0i.pdf
*depending on state and station

the station 2 miles from my house is e85, which is actually 85% most the time, at worst 80%, year round. It's some Valero.

Sadly, the shell/propel stations around here are all 70% for some reason.
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Old 05-24-2016, 07:24 PM   #2585
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*depending on state and station
That was in my head when I wrote it, but didn't make it to the fingers.

Yes, states, as those of us with CA experience know, have their own standards for fuel blending which sometimes deviate from industry and Fed specs.
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Old 06-16-2016, 07:18 PM   #2586
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miataturbo.net-like debauchery thread (about the ND or something)-80-13412131_1060374087349482_7836437631912817921_o_c53aff53eec7ed74b037409833eebda6bd0c7a27.jpg   miataturbo.net-like debauchery thread (about the ND or something)-80-supermiata_nd_xida_inline_triple_dyno_65ce21a9f9089f9f9ab01e66d0232a8c8d909fbe.jpg   miataturbo.net-like debauchery thread (about the ND or something)-80-supermiata_nd_xida_single_adjustable_84349bc85b4e155f7ad0b7b6b10d1457fc0cc986.jpg  
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Old 06-16-2016, 08:51 PM   #2587
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My evil plan . . .

1. 2018-19 Sport (give them a couple of years to fix the gearbox and whatever other issues come up);
2. Swap in LSD from a wrecked 2016 Club;
3. Add the ND XIDAs, 6ULs and recommended sways that will be out by then;
4. Add ND roll bar;
5. Add long-tube headers, exhaust and tune to add 40ft-lbs across entire rev range;
6. Profit!!

Modernized 95R project!
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Old 06-16-2016, 08:52 PM   #2588
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I'm starting to wonder if I should do the Sport the same way. Will have to play with lease figures again....
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Old 06-17-2016, 03:49 AM   #2589
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I am considering a Sport, as well. The stock LSD isn't very expensive, but it also isn't very good, so waiting for an OSGiken is probably a good thing. The stock one, however, could be installed at first, as a stop-gap measure, and then you would have an entire open OEM assembly to put a OSG in when it releases.

I think I would miss the stock better stereo in the Club or GT and the eventual display gauges that will come out for the dash screen, though.
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Old 06-17-2016, 09:38 AM   #2590
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Quote:
Originally Posted by hornetball View Post
My evil plan . . .

1. 2018-19 Sport (give them a couple of years to fix the gearbox and whatever other issues come up);
2. Swap in LSD from a wrecked 2016 Club;
3. Add the ND XIDAs, 6ULs and recommended sways that will be out by then;
4. Add ND roll bar;
5. Add long-tube headers, exhaust and tune to add 40ft-lbs across entire rev range;
6. Profit!!

Modernized 95R project!
Honestly this is about my plan for when I get a ND in a few years. Then after all that fun, I start on the ND MKTurbo setup.
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Old 06-17-2016, 09:39 AM   #2591
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Old 06-17-2016, 10:27 AM   #2592
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Whoa!

"triples" Now what does the rebound adjuster look like?

Is it possible to have the rebound high speed blowoff slope much flatter?
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Old 06-17-2016, 01:48 PM   #2593
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Quote:
Originally Posted by JasonC SBB View Post
Whoa!

"triples" Now what does the rebound adjuster look like?

Is it possible to have the rebound high speed blowoff slope much flatter?
Rebound side is same as the singles. See the single plot above to view the double digressive piston-ness.
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Old 06-17-2016, 02:49 PM   #2594
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Any reason we can't have separate high/low valving on rebound?

I dunno, it just seems kind of lazy. I'm sure they work ok, but I just don't know if they have enough ***** on them to really qualify as the sickest coilovers on the market. They need to be, like, 20% more dope.













(ducking)











j/k, man. Those plots look amazing.
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Old 06-17-2016, 03:15 PM   #2595
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AI just don't know if they have enough ***** on them to really qualify as the sickest coilovers on the market. They need to be, like, 20% more dope.
I just inhaled coffee. D*** you!
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Old 06-17-2016, 03:21 PM   #2596
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Quote:
Originally Posted by Joe Perez View Post
Any reason we can't have separate high/low valving on rebound?

I dunno, it just seems kind of lazy. I'm sure they work ok, but I just don't know if they have enough ***** on them to really qualify as the sickest coilovers on the market. They need to be, like, 20% more dope.

(ducking)
j/k, man. Those plots look amazing.
Yup, that would be a 4 way adjustable shock.
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Old 06-17-2016, 07:14 PM   #2597
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Maybe the racetech suspension book I read is out of date or old school or something, but why would you want or need high and low speed rebound adjustment? With any given spring rate, doesn't the suspension always unload at the same rate? I understand why high and low compression, but rebound? I don't get it.
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Old 06-17-2016, 07:47 PM   #2598
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Quote:
Originally Posted by williams805 View Post
Maybe the racetech suspension book I read is out of date or old school or something, but why would you want or need high and low speed rebound adjustment? With any given spring rate, doesn't the suspension always unload at the same rate? I understand why high and low compression, but rebound? I don't get it.
The wheel is both pulled down by gravity and pushed down by the spring, and the force that the spring applies depends on how far it's been compressed, right?

--Ian
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Old 06-17-2016, 07:49 PM   #2599
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Yes. F=k*d
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Old 06-17-2016, 09:55 PM   #2600
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Quote:
Originally Posted by williams805 View Post
Maybe the racetech suspension book I read is out of date or old school or something, but why would you want or need high and low speed rebound adjustment? With any given spring rate, doesn't the suspension always unload at the same rate? I understand why high and low compression, but rebound? I don't get it.
Cars have mass, and things with mass have inertia.

For an uneven road surface, the rate of acceleration of the suspension in rebound increases as the rate at which the road is falling away from the vehicle increases.

But more specifically, it was just the setup for a joke.
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