Hydra Nemesis

[Sov13t]

You are correct, the Hydra communicates with a computer via a DB-9 Serial Port:


You can either pick up a cheap old laptop that has Serial Port interface or you can buy an expansion PCMCIA card (which is what I did) for newer laptops that no longer support that interface. I picked one up for around $55 shipped, the reason I went so expensive was I wanted to make sure that the port was fully addressable and could emulate RS232 protocol (which the Hydra needs), so I went with a proven brand.

My MAF is still connected and inside the car The EMS simply does not read from it.

Not sure what Tom or Bobby did with theirs, but I am keeping it there for the time being... one of the positives is as you pointed out to pass emissions easier... you can simply unhook Hydra and hook up your old stock ECU and off you go (granted your using stock injectors and so on).

-Sov13t.
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[Johnybeas]

What's the max limit for power on the stock injectors??

Also, is a for sure thing that if you are not running the stock ecu that you will not pass emissions?? what happens if you turbo and need to pass emissions then???

One more thing, I'm not sure what serial port connectors have it but I know when I worked at staples we had a few converters from serial to usb for older printers to be able to connect to a newer computer that is lacking that card. Would this work??

[Sov13t]

Max limit for stock injectors and fuel pump is said to be around 240-250 bhp as far as I know. (can someone confirm?)

Running a non stock ECU will probably mean you have it tuned for max power... as such it will most likely be not environmentally friendly

The creators of Hydra EMS warned users not to purchase USB to Serial converters as they are not fully addressable ports... but simply simulations of a port. Hydra needs back and fourth communication at a fairly high speed.

-Sov13t
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[sperry]

I believe the Hydra will pass OBD-I emissions, as they don't require plugging into the ECU. At least my OBD-I smog check here in Reno is just a visual check that the CEL is not lit, and then a tailpipe sniffer test. YMMV.

OBD-II is right out... I have to swap my Hydra for my stock ECU that's been remapped for blow-thru MAF on my WRX to pass emissions.

As far as the USB/Serial adapters, like Sov13t said, they usually just emulate the TX/RX lines on the serial port, and not the full RS232 chipset. My guess is that the Hyrda uses flow control, RTS, etc... basically all the pins in the DB-9, instead of just the 2 or 3 pins the USB adaptors simulate.

And just one not on the MAF sensor and the Hydra... I'm not sure how the SVX Hyrda is setup, but on the WRX Hydra, the Hydra uses the temperator sensor built into the MAF sensor for intake temp. So you still need it hooked up. Lots of people just tuck it into the fender well or somewhere else out of the way to just read ambient, but I'm using mine in-line with the intake to read post-intercooler intake temps.

[TomsSVX]

With the base maps there is no temperature correction. Users will need to fit an Open Element GM IAT sensor to their intake and have it taken care of.

You can have the tuner, tune the car to pass emissions on the aux fuel maps. It will pass emissions if it is done right for OBDI cars. OBDII will need to use the stock ECU to pass.

Tom

Originally Posted by sperry

I believe the Hydra will pass OBD-I emissions, as they don't require plugging into the ECU. At least my OBD-I smog check here in Reno is just a visual check that the CEL is not lit, and then a tailpipe sniffer test. YMMV.

OBD-II is right out... I have to swap my Hydra for my stock ECU that's been remapped for blow-thru MAF on my WRX to pass emissions.

As far as the USB/Serial adapters, like Sov13t said, they usually just emulate the TX/RX lines on the serial port, and not the full RS232 chipset. My guess is that the Hyrda uses flow control, RTS, etc... basically all the pins in the DB-9, instead of just the 2 or 3 pins the USB adaptors simulate.

And just one not on the MAF sensor and the Hydra... I'm not sure how the SVX Hyrda is setup, but on the WRX Hydra, the Hydra uses the temperator sensor built into the MAF sensor for intake temp. So you still need it hooked up. Lots of people just tuck it into the fender well or somewhere else out of the way to just read ambient, but I'm using mine in-line with the intake to read post-intercooler intake temps.

[Johnybeas]

good info guys! thanks! I'm getting really excited! I think I might be looking to try and purchase this in march or April! I'm stoked!

[Johnybeas]

I had another question, do the base maps push the red line like the ecu tune chips did?? I think a higher red line would really help, when my buddy who has an integra and I go cruise it seems like around the time I'm shifting to third he catches up and gets that nose lead because he doesn't have to shift as soon.

[Sov13t]

<picard>

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[odepaj]

Originally Posted by Sov13t

<picard>

I know, hes learning though.

Originally Posted by Johnybeas

I had another question, do the base maps push the red line like the ecu tune chips did?? I think a higher red line would really help, when my buddy who has an integra and I go cruise it seems like around the time I'm shifting to third he catches up and gets that nose lead because he doesn't have to shift as soon.

The reason the ECUtune stuff would redline higher is because LAN moved the rev-limiter.

The Hydra is nothing like the stock ECU in terms of rev-limiters and such.

In fact (correct me if im wrong) but it requires a special TCU chipset from YT just to be used with the 4EAT. This is only recent also. It originally HAD to be used with a MT.




Dustin

[Tim]

Originally Posted by Sov13t

<picard>

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[TomsSVX]

Originally Posted by Johnybeas

I had another question, do the base maps push the red line like the ecu tune chips did?? I think a higher red line would really help, when my buddy who has an integra and I go cruise it seems like around the time I'm shifting to third he catches up and gets that nose lead because he doesn't have to shift as soon.

The redline is fully adjustable. Honestly with the stock engine there is no need to spin it any higher as you run out of power before you run out of revs.

Originally Posted by odepaj

I know, hes learning though.



The reason the ECUtune stuff would redline higher is because LAN moved the rev-limiter.

The Hydra is nothing like the stock ECU in terms of rev-limiters and such.

In fact (correct me if im wrong) but it requires a special TCU chipset from YT just to be used with the 4EAT. This is only recent also. It originally HAD to be used with a MT.




Dustin

You only need a chip for the TCU if you want higher shift points. I do not offer this right now but you may be able to talk to B3hla about how to do it yourself or maybe have him do it for you.

Tom

[TomsSVX]

I am going to be bringing the Hydra to Reading. I will be offering to do a quick install in people's cars so that they can experience the differences they should expect with it. I think this is the best way to show people what it can actually do for them

Tom

[SVXRide]

OMG! Will you have the school bus by then so you can offer a transport service when people get overly excited by the new-found power?
-Bill

[TomsSVX]

Originally Posted by SVXRide

OMG! Will you have the school bus by then so you can offer a transport service when people get overly excited by the new-found power?
-Bill

I hope to have it by then... but not to transport anyone else's cars

Tom

[YourConfused]

So the hydra has Check Engine Light Control, but I was thinking I saw you say that it won't have error code capabilities. Is this correct or did I read something wrong?
Thanks