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 91 
 on: October 05, 2016, 05:06:44 PM 
Started by Papa Roe - Last post by SilverMiataRacer
I only got a 5, but if I didn't keep second guessing myself I would have gotten 8.  I have a habit of answering and changing my mind and it usually screws me up.

 92 
 on: October 05, 2016, 05:04:36 PM 
Started by Papa Roe - Last post by sfcarbone
That was tough, I got 6.

 93 
 on: October 05, 2016, 02:24:21 PM 
Started by Papa Roe - Last post by thomsoad
LOL..I got 2 out of 10.  And I guessed on the timing belt question.
At least I knew the MSM question.  Cheesy

 94 
 on: October 05, 2016, 04:26:18 AM 
Started by Papa Roe - Last post by '95MSM
If you are looking for the hardest Miata trivia quiz, that one will be hard to beat. Lots of very arcane bits of info. 5 of 10 for me.

Sort of like asking Mazda rotary fans for the geometric name of the shape of a rotary engine piston (tri-lobed envelope of the epitrochoid curve).

 95 
 on: October 05, 2016, 03:16:09 AM 
Started by Qwimby1 - Last post by Qwimby1
The delrin door bushings help a lot.

I'm going to order the door bushings.  Has anyone tried the OEM hard top brackets?

 96 
 on: October 05, 2016, 02:11:20 AM 
Started by Papa Roe - Last post by Papa Roe
http://www.autoguide.com/auto-news/2016/10/the-hardest-mazda-mx-5-miata-quiz-ever.html?utm_content=title1&utm_source=newag20161004&utm_medium=email&utm_campaign=autoguide_review_may15&utm_term=AutoGuide%20Review%20Subscribers

Click on the link and scroll down the page and click on the "Start" button.

 97 
 on: October 04, 2016, 08:54:39 PM 
Started by PK1 - Last post by PK1
Thanks guys. Yes, in this context I was only referring to the stock NB that is after the cat. Here's what I have:

- the OEM sensor by the turbo is still the original one, I haven't touched that one at all
- when i installed the FM exhaust a month or so ago, I changed the rear NB sensor with a new Bosch unit and spliced it in the original harness. I'm not overly worried about this one. If it fails over time when not used it's cheap and easy access with the FM setup
- I just installed the WB that came with my Hydra before the cat.  This one I'd rather not have to mess with every year. It's nowhere near as bad as changing the one by the turbo, but I'd still rather not have to mess with it every year

Sounds like keeping he WB and keeping the time and number of starts to a minimum may not be too bad an issue. I'll give it a shot in 9 months!

 98 
 on: October 04, 2016, 06:53:11 PM 
Started by PK1 - Last post by SilverMiataRacer
The O2 sensor after the cat (in the cat on a stock exhaust) is not the O2 sensor that control the stock ECU fueling.  It is to check the condition of the cat an d report that it is working.  They Hydra does not use that one at all.  It can use the stock NB which is up in the fitting by the turbo.

 99 
 on: October 04, 2016, 06:46:47 PM 
Started by PK1 - Last post by rotorglow
I leave the WB in place for a week each year.  I probably wouldn't drive cross-country like that, or cold-start it 30 times, but because it's usually only for something like 25 miles or so over 3 or 4 trips, it's been no big deal.  

Also yes to the second question, the stock one is installed after the cat. Basic question: does Hydra still use the stock O2 sensor? If not (and assuming that one is heated too), then the same issue would exist wth the stock sensor!

Your answer is confusing.  There are TWO stock sensors.  One before the cat, one after.  Yes, the Hydra can indeed use the stock sensor before the cat, for AFR control wherever the map calls for stoich (14.7:1).  It does not use the rear one; some people pull it out to keep it from dying, but mine is still the original one from the factory.

Note that you can choose to use the wideband for stoich instead of the narrowband, but it probably doesn't react as quickly as the narrowband.  Regardless, it's helpful to leave the front narrowband in as a sanity check on what the wideband is doing, to say nothing of making a changeover to stock easier.

 100 
 on: October 04, 2016, 06:05:00 PM 
Started by PK1 - Last post by PK1
First, you are putting the WB in a different bung from the stock O2 sensor, right?

Second, are you leaving the stock sensor in when you are running the Hydra?

Third and this is a what if as I have no knowledge of this working or ever having been done.  Could you rig a plug to plug into the WB when it's not in use and connect it to power for the heater to have the heater on when the car is on??  If the reason for them failing, and I don't know that this is it, is that the heater isn't on when the sensor isn't in use maybe you could just turn the heater on manually whenever you use the car in stock ECU mode.


Yes to the first question, I installed it in the bung that goes before the cat. (Full FM exhaust system).

Also yes to the second question, the stock one is installed after the cat. Basic question: does Hydra still use the stock O2 sensor? If not (and assuming that one is heated too), then the same issue would exist wth the stock sensor!

And as for the third, this is the first question I asked Jeremy when he told me I needed to remove it. His response was that Hydra controls the heater, it's not on all the time!

In all the reading I've done I've never come across the need to remove the WB sensor so I'm hoping the chances of failure are remote and I can leave it in place.

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