Diary of a Madman; TitaniumTT's see you @ DGRRXI RE-REbuild

[helghast7]

muhuhahahahahaha

[TitaniumTT]

Originally Posted by vex

You only need an input if you want to run it in a closed loop function. You could easily setup similarly to how the stock stepper motors worked (did a full sweep to minimum on start up). So unless someone stuck something in there to keep it from hitting minimum first it should be fine.

As it stands right now; the stepper motor control of the Haltech can run Oil Pumps (Which can also be used for intake manifold runner length alteration), and ICV's.

From what I understand from the MoTeC notes and data sheets, the Renni OMP is a non feedback OMP and requires a different ECU option. Anything 13B uses the feedback type OMP and that's a basic stepper motor option. The 13B electric OMP is a feedback type stepper, that's how, from what I understand, all the DBW's work, you need redundacy damnit

Originally Posted by WE3RX7

nice..

Side note, noticed your from Akron, sorry, lol... most my family lives in/around Wadsworth/Hudson so I go through Akron fairly often. Hope your FC is not an original OH car....

Pssssshhhhh, my FC was originally a CT/VT car! And we all saw the holes in that chassis

Originally Posted by helghast7

muhuhahahahahaha

Sexy..... I need my Stage 3's here, noaw damnit!!!!

[vex]

Originally Posted by TitaniumTT

From what I understand from the MoTeC notes and data sheets, the Renni OMP is a non feedback OMP and requires a different ECU option. Anything 13B uses the feedback type OMP and that's a basic stepper motor option. The 13B electric OMP is a feedback type stepper, that's how, from what I understand, all the DBW's work, you need redundacy damnit

For the OMP you do need an input signal for position to have it work, however on the Haltech when running an ICV, it does not require the use of another input (as other sensors dictate the need and what not of the valve)--thus it stands to reason that if you can find a means of using the stepper motor without the extra need of an input you could mimic the same stepper motor controls with a predetermined startup routine.

(I was referencing the AAS startup routine in the original post)

[RETed]

Originally Posted by vex

For the OMP you do need an input signal for position to have it work, however on the Haltech when running an ICV, it does not require the use of another input (as other sensors dictate the need and what not of the valve)--thus it stands to reason that if you can find a means of using the stepper motor without the extra need of an input you could mimic the same stepper motor controls with a predetermined startup routine.

Doesn't that get kinda dangerous?

I haven't researched this in detail, so there are a few assumptions...

I know it's a 4-position valve, so it's a 4-pole stepper motor.
Does it have limiters on min (1) and max (4)?
If it has limiters, then it's a little bit safer...
If it doesn't, then you can easily jump from min to max with one errant signal.

There has to be a reason why Mazda went with a feedback signal system.

You would think that the OMP system is important enough to have this feedback system functional.
It does throw a nasty error (which goes into limp-home mode) when triggered.


-Ted

[TitaniumTT]

Originally Posted by RETed

Doesn't that get kinda dangerous?

I haven't researched this in detail, so there are a few assumptions...

I know it's a 4-position valve, so it's a 4-pole stepper motor.
Does it have limiters on min (1) and max (4)?
If it has limiters, then it's a little bit safer...
If it doesn't, then you can easily jump from min to max with one errant signal.

There has to be a reason why Mazda went with a feedback signal system.

You would think that the OMP system is important enough to have this feedback system functional.
It does throw a nasty error (which goes into limp-home mode) when triggered.


-Ted

From my understanding, that's EXACTELY why the DBW systems have the safety of a redundant TPS in there... to prohibit thing like that from happening.

Also, from my understanding the OMP on the Renni doesn't have a feedback, while the S5+ units do, again, for that reason of it being rather important. Not quite sure why Mazda changed it for the Renni, but I'm sure they have some type of safety involved with it... I agree with ya, it would be foolish not to,

[j9fd3s]

Originally Posted by TitaniumTT

From my understanding, that's EXACTELY why the DBW systems have the safety of a redundant TPS in there... to prohibit thing like that from happening.

Also, from my understanding the OMP on the Renni doesn't have a feedback, while the S5+ units do, again, for that reason of it being rather important. Not quite sure why Mazda changed it for the Renni, but I'm sure they have some type of safety involved with it... I agree with ya, it would be foolish not to,

the Rx8 MOP is explained in the service highlights book. off the top every couple of engine starts the ecu puts the pump thru its range, so it isn't checked in real time like the 89-2003 pumps.

we set my haltech to run the mop (it was a 20B), the haltech can RUN a stepper motor, but the position sensor is a problem, because its monitored somewhere else, and you can't do anything EXCEPT log it. so if the MOP took a crap, there is no limp home, no CEL....

[helghast7]

Originally Posted by TitaniumTT

Sexy..... I need my Stage 3's here, noaw damnit!!!!

well you will definetly be done before me when it comes to that type of upgrade, i keep getting hit with these large bills, i need to get more stabilized again before i can really start buying stuff, i have a feeling my diff is going to sit at daves at least a month before i can go get it

as for the switches, thats next on my todo list, first i need to finish buttoning up this bike so i can deliver it already, once thats done im gonna dive into the basement and locate them and bring the cup holder idea for you at the same time

btw, i just remembered, whats a good company to get a resonator from because i blew out the one we welded in, so that rules out magnaflow and obx, i was thinking borla but there just so pricey im not sure its worth it

i was also thinking about a straight pipe because i dont care how loud the car is, as long as it doesnt resonate inside...bbbbuuuutttt rotaries ive heard without some sort of resonator tend to have a very metallic hollow twang to them, whereas im more fond of my deeper roar...idk