st170 cam actuator whitch is + and - and when should cam kick in?
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From: Leicester le7
st170 cam actuator whitch is + and - and when should cam kick in?
i just fitted a st170 engine in to my focus and its running mtech v4 ecu and gsxr 42mm K2 throttle boddies
all this stuff was fitted to my original 1.8 engine before the swap and left the wire for the cam wraped up under the engine bay
il put the questions below in a list to avoid pointless waffling
cheers
all this stuff was fitted to my original 1.8 engine before the swap and left the wire for the cam wraped up under the engine bay
il put the questions below in a list to avoid pointless waffling
- What pins on the injector style connector for the cam actuator is + and - ?
- what is the best throttle rpm for the cams to kick in?
- what can i set the rev limiter to on a standard engine?
- and on the mtech v4 ecu do the outputs give 12v and not require a relay?
cheers
Last edited by mrviper; Sep 9, 2010 at 05:17 PM.
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Joined: Mar 2005
Posts: 375
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From: Guildford, Surrey
1) Pin 1 (GN/OG) is the 12v feed, Pin 2 (BK/RD) is the ground switched by the PCM.
2) The system and cam is designed for a continuously variable adjustment of advance. Although some have used it as a two position system, it really needs the cam pulley to be set for an optimum power position at fully advanced, which is around 30 degrees away from the factory setting.
3) About 7,200
4) Don't know, but most ECU's provide a negative (ground) output which depending on physical configuration will be either high current (for ICV, Injectors, VVT, etc) or low current (for indicators, relays, etc).
To run the VVT as intended you really need a Pulse Width Modulated (PWM) output driven by a closed loop algorithm. I don't know of any 'road' ECUs that offer that facility, your moving towards clubman competition equipment.
A few ECUs can operate a PWM output in open loop. That would allow programming, as you indicate you want, the ability to have a low/high revs setting ie 30%/70%, but what would give optimal cam position.......
VVT doesn't add any power BTW, it only improves flexibility.
Martin
2) The system and cam is designed for a continuously variable adjustment of advance. Although some have used it as a two position system, it really needs the cam pulley to be set for an optimum power position at fully advanced, which is around 30 degrees away from the factory setting.
3) About 7,200
4) Don't know, but most ECU's provide a negative (ground) output which depending on physical configuration will be either high current (for ICV, Injectors, VVT, etc) or low current (for indicators, relays, etc).
To run the VVT as intended you really need a Pulse Width Modulated (PWM) output driven by a closed loop algorithm. I don't know of any 'road' ECUs that offer that facility, your moving towards clubman competition equipment.
A few ECUs can operate a PWM output in open loop. That would allow programming, as you indicate you want, the ability to have a low/high revs setting ie 30%/70%, but what would give optimal cam position.......
VVT doesn't add any power BTW, it only improves flexibility.
Martin
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