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Old 11-09-2007, 12:59 PM   #1
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Default MSpnp doesn't use all the factory switches!!!!oneone

He's pretty sly about it, but it seems like he's looking for an excuse to knock the product.

Quote:
Originally Posted by Keith
We're trying to get Hydra to add the ability to use different widebands.
The Hydra CAN be locked up by a password, but the ones sold by FM are not currently set up that way.
The Hydra is fully plug and play. Even the plug and play MS doesn't use all the factory sensors, such as the idle switch.
Support from the Hydra company really doesn't matter - if you live in North America, you'll deal with FM. If you live elsewhere, you'll deal with the distributors. We have no complaints right now.

Here's a 1995 with an aftermarket exhaust and no other modifications. We strapped it to the dyno, tested it, plugged in a Link and tested it again.
http://www.flyinmiata.com/tech/dyno_...ito_101501.pdf

The 1994 engine in Bill's Westfield has a Hydra. The head is refreshed with fresh valves and a bit of unshrouding. The exhaust manifold is stock and the intake is a hot air setup chosen for packaging above all else. It made 128 hp at the wheels with sharp throttle response.

Aftermarket ECUs can definitely help naturally aspirated cars, but they're expensive. Most people stop after the usual intake/header/exhaust modifications due to exhaustion of the pocketbook.
Quote:
Originally Posted by Keith
The idle switch is very useful in getting the car to idle. My understanding is that the MS can use a variable TPS to determine this, but there isn't one on a 5-speed 1990-93. There are various workarounds, but the easiest solution would be to use the on/off idle switch on the factory sensor. This apparently is not currently workable. The Link and the Hydra both use the factory sensor in this way.

Yes, the Hydra has its own integrated MAP sensor. There's no real benefit to keeping the AFM.
I also doubt we'd see 128whp out of a NA 1.8 with $2000 in light headwork on a non-FM dyno.


Yes, I'm a ****-stirring ************.
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Old 11-09-2007, 01:06 PM   #2
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He works for a vendor, of course he's going to promote his product. Has he said anything that isn't true?

Could you post the link to the thread where you got this from? With out context the meaning can be misunderstood.
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Old 11-09-2007, 01:08 PM   #3
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Old 11-09-2007, 01:09 PM   #4
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I don't really see what he is talking about when he says it doesn't use the stock idle switch. The MSPNP controlls the stock IAC valve. That is the only idle switch i know of.
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Old 11-09-2007, 01:12 PM   #5
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Quote:
Originally Posted by cjernigan View Post
I don't really see what he is talking about when he says it doesn't use the stock idle switch. The MSPNP controlls the stock IAC valve. That is the only idle switch i know of.
there is a tps switch. I thought it was an on/off at full throttle, but apparently its for idle. Either way, both are equally plug n play, and both work just fine. I thought the comment was interested that MSpnp doesn't use every switch in the car, then he goes on about how hydra lets you pull the AFM.
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Old 11-09-2007, 01:22 PM   #6
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peolpe who had tps issues will have it stock or MSPNP, MSPNP allows you to use a variable TPS
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Old 11-09-2007, 01:44 PM   #7
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Quote:
Originally Posted by hustler View Post
there is a tps switch. I thought it was an on/off at full throttle, but apparently its for idle.
The factory TPS in '90-'93 Miatas without automatic transmissions is actually two switches in one housing, with a common return.

When the throttle plate is fully closed, then the "idle" switch is activated. When the throttle plate is fully open, then the "WOT" switch is activated. When the throttle plate is in an intermediate position (neither fully open nor fully closed) then neither switch is activated.

The 1.8 NAs, and those with automatics, have a TPS that contains one switch and a potentiometer. I *think* that said switch indicates the "idle" position, with the "WOT" function being determined off the potentiometer alone.

It's not terribly relevant however as in the NB Mazda decided to do away with the switches altogether and run based on the potentiometer alone.

So if we consider the NB's ECU to be superior to the NA's ECU, then it follows that judging TPS based solely off a potentiometer is superior than using switches to do so. Ergo the MSPNP.
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Old 11-09-2007, 02:21 PM   #8
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heh, yeah what do you need a "switch" for when you can tell the MSPNP that <2%TPS = idle?
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Old 11-09-2007, 02:48 PM   #9
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He's right. The 90-93 PNP (in stock form) completely ignores TPS. If the user wants, he can upgrade to a linear TPS, which is the BEST solution and is easy to do. I'm trying to figure out what the issue is here, or is Trey just stirring the pot.
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Old 11-09-2007, 03:12 PM   #10
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The Hydra and the MS don't really cater to the same market, IMO. Plus, since Keith doesn't like Tom, I like Keith, so why stir ****
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Old 11-09-2007, 03:17 PM   #11
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why the **** is everyone using my name!!!1111
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