Stand alone or not????
#1
Stand alone or not????
OK. I'm at the stage when I need to decide which way to go.
My car is currently a 1991 1.6 manual with a 1.8 1994 engine fitted. I have kept the 1.8 throttle body complete with 4 wire TPS. The A/C has been removed. I have fitted the toyota COP mod. Yellow RX8 injectors.
The car has not yet run in its presnet configuration and still has the 1991 ECU fitted.
I have kept the power steering.
Any ideas which is the best route to go and reasons? I have nearly finished my MS1 build.
I do not intend to return this car to stock. Ever!
I plan to run boost control and the improved spark mod.
Thanks
My car is currently a 1991 1.6 manual with a 1.8 1994 engine fitted. I have kept the 1.8 throttle body complete with 4 wire TPS. The A/C has been removed. I have fitted the toyota COP mod. Yellow RX8 injectors.
The car has not yet run in its presnet configuration and still has the 1991 ECU fitted.
I have kept the power steering.
Any ideas which is the best route to go and reasons? I have nearly finished my MS1 build.
I do not intend to return this car to stock. Ever!
I plan to run boost control and the improved spark mod.
Thanks
#6
Im intrigued as to why so many shout for standalone when all you are taking on is more time spent messing around with idle values and other mundane stuff.
I'm not having a go, I just find it amusing that having control over the fan, idle and AC etc makes it so much more "win" I'd rather just get on with tuning fuel and spark and let the OEM ecu do it fine job of handling idle, the fan, AC and any other mundane task.
Unless it's ***** waving rights - In which case, I'll get me coat...
I'm not having a go, I just find it amusing that having control over the fan, idle and AC etc makes it so much more "win" I'd rather just get on with tuning fuel and spark and let the OEM ecu do it fine job of handling idle, the fan, AC and any other mundane task.
Unless it's ***** waving rights - In which case, I'll get me coat...
#7
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I took over the idle control primarily to compensate for having a lightweight flywheel. Allowing me to tune my idle as I see fit for better recovery and stability.
Secondly, I took control of my fans in the off chance I decide to run a cooler thermostat. I can trim my on/off temps to my liking.
I do however miss the factory A/C compensation but with the idle settings in Megasquirt it's a close second to factory.
After all that, I saw no need to keep the factory ecu just for the A/C. There's also the random issues with sharing sensor inputs. Since I no longer needed the factory ecu, I decided to remove it altogether.
I can see your point though, I suppose it's more of a "win" in my particular application. However, it did make my ***** bigger anyway.LOL
Cheerio mate
Secondly, I took control of my fans in the off chance I decide to run a cooler thermostat. I can trim my on/off temps to my liking.
I do however miss the factory A/C compensation but with the idle settings in Megasquirt it's a close second to factory.
After all that, I saw no need to keep the factory ecu just for the A/C. There's also the random issues with sharing sensor inputs. Since I no longer needed the factory ecu, I decided to remove it altogether.
I can see your point though, I suppose it's more of a "win" in my particular application. However, it did make my ***** bigger anyway.LOL
Cheerio mate
Last edited by lordrigamus; 04-21-2010 at 12:43 AM.
#9
Im intrigued as to why so many shout for standalone when all you are taking on is more time spent messing around with idle values and other mundane stuff.
I'm not having a go, I just find it amusing that having control over the fan, idle and AC etc makes it so much more "win" I'd rather just get on with tuning fuel and spark and let the OEM ecu do it fine job of handling idle, the fan, AC and any other mundane task.
Unless it's ***** waving rights - In which case, I'll get me coat...
I'm not having a go, I just find it amusing that having control over the fan, idle and AC etc makes it so much more "win" I'd rather just get on with tuning fuel and spark and let the OEM ecu do it fine job of handling idle, the fan, AC and any other mundane task.
Unless it's ***** waving rights - In which case, I'll get me coat...
Anyway, I was wondering how you go about this. Do you connect only the idle valve to the stock ecu and connect the injectors to the MS?
#11
OP, go standalone and don't ever look back. Best day of MS tuning was when I took the car to my uncle's shop for some suspension and clutch work (borrowed lift). I was listing off some of the things I'd done, and while sitting in the car handed him the OEM ECU and proceeded to start the car. The look on his face was priceless (he always thought I was an idiot).
Anyhow, the Mazda piece is a paperweight.
#17
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Zardoz has spoken.
Seriously, though. The fourth lead on the '94-'97 TPSs is an idle switch closure, just like the 1.6 cars had. (On the NB, they finally dropped this.)
With the MS, you don't need this contact. In fact, the MS wouldn't know what to do with it. All you need are the three wires associated with the analog potentiometer section. Specifically, the green/white wire comes from the MS's Vref (+5) supply pin, the black/blue wire is ground, and the red/black wire is the variable signal that goes to the MS's TPS input.
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