mS on 2004
#21
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If you guys have not seen it yet BRP has suggested a VVT mod that works well with FI applications. It looks like you just advance the vvt sensor by 2 deg, so I guess this would keep valve timing advanced by 2 deg from stock all the time. They claim this was good for 30hp on their top end supercharger system.
If you interested check out the brp forum site or I have a PDF instruction sheet they put out, anyone interested can pm me their email and I will send it to ya.
Things are looking up for the MS on 01+ cars, let’s keep this thread going.
I’m about halfway done the build on my MS. Right now I need to set the jumpers to select between the VR or hall/optical type sensor. Is the VR sensor the one that works with CAS?
If you interested check out the brp forum site or I have a PDF instruction sheet they put out, anyone interested can pm me their email and I will send it to ya.
Things are looking up for the MS on 01+ cars, let’s keep this thread going.
I’m about halfway done the build on my MS. Right now I need to set the jumpers to select between the VR or hall/optical type sensor. Is the VR sensor the one that works with CAS?
#23
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Originally Posted by kingofl337
Reverant, the CAM sensor is mounted on the front of the timing belt pully. It does not change with the VVT.
Closeup:
Originally Posted by kingofl337
The fuel pump does not change voltage the pressure is fixed a 50psi. The regulator is in the tank. You just have to adjust your injector CC size based on the rated flow at 43psi vs 50psi.
Originally Posted by kingofl337
The VVT is not progessive its on or off. All you have to do is setup the shift light output on the MS and it will turn on the VVT at a target RPM.
#24
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Originally Posted by olderguy
Pictures? Source?
http://www.cardomain.com/ride/2287976/3
#27
The '99 workshop manual says the fuel line pressure should be between 53-61 psi, and the injector volume 264-328 cc/min. That's quite a big range. I'm assuming it will be pretty much the same on all the returnless setups. Does anyone have any good sources on what (if anything) controls how hard the fuel pump works?
#28
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Originally Posted by saboteur
Does anyone have any good sources on what (if anything) controls how hard the fuel pump works?
#29
Source: http://www.madracki.com/miata/images/wiring/99sys.pdf
http://www.madracki.com/miata/images/wiring/00sys.pdf
Fuel pump connects to the main relay and then is grounded. It is not adjusted by the ECU.
The firing order and timing is still controlled by the crank mounted sensor. The cam is just a
reset on the megasquirt. So VVT changes shouldn't effect the megasquirt.
Also the megasquirt supports PWM output on Fidle I bet the extra guys could
adapt it to control the VVT.
Someone would have to try to MS a 01 to see if they can get everything to work. If you
leave the MAS in line the VVT should run correctly on the stock computer.
http://www.madracki.com/miata/images/wiring/00sys.pdf
Fuel pump connects to the main relay and then is grounded. It is not adjusted by the ECU.
The firing order and timing is still controlled by the crank mounted sensor. The cam is just a
reset on the megasquirt. So VVT changes shouldn't effect the megasquirt.
Also the megasquirt supports PWM output on Fidle I bet the extra guys could
adapt it to control the VVT.
Someone would have to try to MS a 01 to see if they can get everything to work. If you
leave the MAS in line the VVT should run correctly on the stock computer.
Last edited by kingofl337; 06-16-2006 at 11:48 AM.
#30
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Update: The MS and the LM-1 arrived today at work - what a shame I am on a sick leave. :-/
Nevermind, instead of reading my emails tomorrow first thing in the morning, I'll be unwrapping pretty little packages instead. So stay tuned for the first install of an MS on 01+ Miata.
Nevermind, instead of reading my emails tomorrow first thing in the morning, I'll be unwrapping pretty little packages instead. So stay tuned for the first install of an MS on 01+ Miata.
#31
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I have been told that the stock MAS would not work properly on a turbo charged car, the reason being that its not calibrated for the higher air flow rates you get on a forced induction engine.s THis is the reason we are all using a MAP sensor instead right?
Strange thing is, it seems that all the supercharger kits out there keep the MAS sensor.
Any experience in running a stock MAS on a turbo miata?
Im going to be using the MAP sensor that the MS comes with but if the VVT is using the MAS for something Im worried this will cause further problems for us.
Strange thing is, it seems that all the supercharger kits out there keep the MAS sensor.
Any experience in running a stock MAS on a turbo miata?
Im going to be using the MAP sensor that the MS comes with but if the VVT is using the MAS for something Im worried this will cause further problems for us.
#33
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Got my Megasquirt couple 'o days ago, along with an LM-1 wideband. I still have to order an extension harness, onto which I'll wire up everything. Below is my initial plan, the "ghosted" parts are left under the control of the stock ECU, while the oxygen sensor (pin 23 on the DB37) will be the LM-1 analog output, ignore the heater and gnd wires. My MAP sensor is not onboard, but external in the engine bay, so it is relayed through pins 27, 29 and 31. Just tell me what you guys think.
#35
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Through the idle solenoid, which it still controls. The oem ecu will open/close the solenoid valve and the MS will see the change in manifold pressure and will squirt and spark accordingly.
#38
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Originally Posted by Arkmage
The crank position sensor will have to remain connected to the stock ECU or you'll get no FIDLE control and a check engine light. Other that that its the finest diagram I have seen yet for MS miatas.
I have only drawn seperate sensor diagrams for the sake of clarity. Both sensors are integrated in one device, see Randy Stocker's page:
http://members.aol.com/solomiata/Fuel-elec.html
(check at the bottom of the page)
#39
Originally Posted by Reverant
No problem there. I have already purchased a used CAS from an NA 1.8, which is the dual wheel, magnetic type. I will retrofit it on the exhaust cam (the slot is still there on NB cars!), so I will actually not use the stock CKP & CMP sensors (which are left totally untouched and will only be connected with the oem ecu).
I have only drawn seperate sensor diagrams for the sake of clarity. Both sensors are integrated in one device, see Randy Stocker's page:
http://members.aol.com/solomiata/Fuel-elec.html
(check at the bottom of the page)
I have only drawn seperate sensor diagrams for the sake of clarity. Both sensors are integrated in one device, see Randy Stocker's page:
http://members.aol.com/solomiata/Fuel-elec.html
(check at the bottom of the page)
#40
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Just to let you guys know...I've updated the diagram above, I've been studying the connections on the stock ECU so some changes had to be made (ie the ckp and cmp sensors use +12V, not the +5Vref). If you continue to see the old diagram and not the new, just hit the refresh button on your browser.
Jim
Jim