Microtech Noob Question About LT 10
#1
Noob Question About LT 10
I am new to the RX-7 world and was hoping someone could help me with a question I have regarding the operation of the LT 10. I have searched on this but couldn't really find an answer.
Is it any big deal to install an LT 10 in a car with air conditioning? For instance, if you have tuned the engine to operate efficiently (and I am not looking at tuning for maximum horsepower - just decent economical operation), what happens when you are idling at a stop light and the A.C. compressor kicks on? Does the Microtech compensate for the increased load?
Engine is basically stock but running non sequential turbos with increased intake and exhaust efficiency.
Thanks in advance for any help you can give me.
Is it any big deal to install an LT 10 in a car with air conditioning? For instance, if you have tuned the engine to operate efficiently (and I am not looking at tuning for maximum horsepower - just decent economical operation), what happens when you are idling at a stop light and the A.C. compressor kicks on? Does the Microtech compensate for the increased load?
Engine is basically stock but running non sequential turbos with increased intake and exhaust efficiency.
Thanks in advance for any help you can give me.
#4
LT 10 Wiring Diagram
Thanks rx72c
I didn't do the original installation. I went to the Microtech website and they offer wiring diagrams for all models except the LT10. Is it available? Will that diagram, if I can get it, show the correct terminations which nned to be made.
A.C. never worked before I got it, so I don't know that it is incorrect.
By the way, can you give me a little more info on the Powerfc?
Thanks,
Jeff
I didn't do the original installation. I went to the Microtech website and they offer wiring diagrams for all models except the LT10. Is it available? Will that diagram, if I can get it, show the correct terminations which nned to be made.
A.C. never worked before I got it, so I don't know that it is incorrect.
By the way, can you give me a little more info on the Powerfc?
Thanks,
Jeff
#5
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They have the general LT10 wiring diagram here:
http://microtechefi.com/microtech-wiring.php#3
http://microtechefi.com/microtech-wiring.php#3
#6
LT 10 Wiring Diagram
Thanks Broken09 for the wiring diagram.
So it looks to me, and I admit I don't know much about this, is the only input back into the controller which may sense a different A/F ratio due to the increased load from an air conditioner compressor would come from the oxygen sensor. Is that correct? So if the oxygen sensor is working properly then the Microtech will respond to the load?
So it looks to me, and I admit I don't know much about this, is the only input back into the controller which may sense a different A/F ratio due to the increased load from an air conditioner compressor would come from the oxygen sensor. Is that correct? So if the oxygen sensor is working properly then the Microtech will respond to the load?
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#8
Aux Input #1?
Thank you for the response. So the only blue/red I see which might be a possibility is Aux Input #1. Perhaps tie into the compressor clutch power? I imagine that whenever the A.C. system engages the compressor clutch it does that with 12v power. Is that the point that supplies the input to the LT10?
It just seems to me that the demands on the air fuel ratio are going to be different at idle and at 75 m.p.h. In other words, if I program more fuel so it runs well at idle, then it will supply more fuel than it needs at cruising speed. Or am I missing something?
It doesn't seem as if the Microtech is very "intelligent" but maybe this is the way all of them operate. Are there any closed loop ECUs?
How did Mazda take care of this with the stock ECU?
Thanks again for the information.
Jeff
It just seems to me that the demands on the air fuel ratio are going to be different at idle and at 75 m.p.h. In other words, if I program more fuel so it runs well at idle, then it will supply more fuel than it needs at cruising speed. Or am I missing something?
It doesn't seem as if the Microtech is very "intelligent" but maybe this is the way all of them operate. Are there any closed loop ECUs?
How did Mazda take care of this with the stock ECU?
Thanks again for the information.
Jeff
#10
So Who is the Smartest ECU on the Block?
For the application I want (maybe want is not the best way to say it). For the application I will probably end up with -
non sequential stock turbos
3" through and through exhaust
and a mildly ported engine
boost limited to a relatively low 10 to 12 - hopefully will be able to limit the creep
and would like decent drivability,
would like to get the A.C. working,
and wouldn't mind decent gas mileage,
is the powerfc still the best choice as previously suggested?
is there a better choice?
Thanks,
Jeff
non sequential stock turbos
3" through and through exhaust
and a mildly ported engine
boost limited to a relatively low 10 to 12 - hopefully will be able to limit the creep
and would like decent drivability,
would like to get the A.C. working,
and wouldn't mind decent gas mileage,
is the powerfc still the best choice as previously suggested?
is there a better choice?
Thanks,
Jeff
#12
Last Question - Hopefully
Would it be difficult to change from a Microtech to a Powerpc? I assume the Microtech harness was spliced into the existing Mazda harness. And the Powerpc just plugs into the existing Mazda harness, so I would need to unsplice the Microtech plug and restore the Mazda harness? Is the Mazda plug available anywhere?
Thanks for all the help,
Jeff
Thanks for all the help,
Jeff
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