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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Mon Mar 13, 2017 10:53 pm 
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Dave knows the Maxy in scrutinous detail and that's why I recommended chatting with him.

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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Mon Mar 13, 2017 11:02 pm 
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I have just realised from Davids message that I have also not grounded the unused inputs marked with an asterisk on the connection diagram ( I blame the small print), so I will try the trigger load setting and the grounding of the unused inputs at the weekend weather permitting.


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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Sat Mar 18, 2017 3:33 pm 
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I have just done as David advised but disapointingly it did not cure my problem, rather irritating as the work involved and the fact that im missing out on a useful function of the maxxy, so it looks as if Im going to have to utilise a microswitch on the accelerator (gas) pedal, I know you have told me this is how you have yours set up, is there a wiring diagram? Not sure where to wire in the microswitch whilst still benefitting from the Maxxy's fuctions


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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Sat Mar 18, 2017 11:03 pm 
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Using a microswitch isn't a big loss, so don't feel too bad about it. simply take the microswitch and have one terminal connect to 12+V and the other terminal to the R10 trigger wire and that's it.

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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Sun Mar 19, 2017 2:24 pm 
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Yes I can see that on the wiring schematic now, can i take the 12v out of the arming switch so it will be protected by the same fuse? Presumably this method of switching is low current due to the size of the R10 terminal and cable which can be utilised in it?


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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Sun Mar 19, 2017 3:48 pm 
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You can do it that way. The trigger wire draws virtually nothing in current, it's only used to 'read' voltage to know when to activate the nitrous.

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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Tue Mar 21, 2017 8:35 am 
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Ive ordered a microswitch, so all the other benefits of the Maxxy will work its just the TPS bit which isnt used?


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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Tue Mar 21, 2017 12:43 pm 
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bmwz4 wrote:
Ive ordered a microswitch, so all the other benefits of the Maxxy will work its just the TPS bit which isnt used?

It will work just fine with the other features. The TPS gives the most accurate reading of where the throttle plate is for fly-by-wire engines, and it's especially useful for finicky cars with super sensitive traction control or limp mode systems that limit butterfly travel regardless of the throttle pedal position. However, BMW's love to be driven HARD so it's doubtful you'd ever run into an issue with the ecu closing the butterfly, which isn't a concern with WoN systems anyway, whereas it would on competitor junk systems.

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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Sun Mar 26, 2017 3:28 pm 
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The sun is shining, wife has gone out with the mother in law, what could be better.....? Well continuing with my installation of course :P Microswitch fitted and wired in, the BMW throttle box set up is made for a microswitch set up, theres even a radius'd ridge on the back of the pedal to activate the switch. Set the rpm to zero and activated the switch, pulsoids buzzin away a good'un. Set the RPM to 2000 min and nothing so that part of the max is working great. What min RPM setting would you recommend
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Ive definately broken the back of it now (i hope), I'm going to order myself a pressure transducer before i get the bottle filled, i've already installed the cabling for it and will probably fit a bottle heater at some stage too.

I know I've still got some work to do but whilst I get to that I have been playing with the power settings to get a feel for it, what baseline settings would you recommend I start with, eg power, build time and delay time for the 1st gear and then for the other 5 gears. Am i correct that the delay time setting for the 1st gear is to slightly delay the delivery of the nitrous to prevent an overly lean mixture and what sort of figure should I start with, bearing in mind the engine in question? Thanks


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 Post subject: Re: BMW Z4 3.0I Install
PostPosted: Mon Mar 27, 2017 12:22 am 
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bmwz4 wrote:
The sun is shining, wife has gone out with the mother in law, what could be better.....? Well continuing with my installation of course :P Microswitch fitted and wired in, the BMW throttle box set up is made for a microswitch set up, theres even a radius'd ridge on the back of the pedal to activate the switch. Set the rpm to zero and activated the switch, pulsoids buzzin away a good'un. Set the RPM to 2000 min and nothing so that part of the max is working great.

Great news! In fact, I just asked about the trigger in your previous thread.

What min RPM setting would you recommend

It really depends on the car and what overall setup. In this case, I'd go right off idle in 1st gear with 50 bhp with the displacement and gearing of the Z4, especially if you're start power is less than 100%: the key is allowing the engine to freely accelerate. I whacked the juice on my 1.4 liter in first gear with 25 jets and 100% start power with good results.

Ive definately broken the back of it now (i hope), I'm going to order myself a pressure transducer before i get the bottle filled, i've already installed the cabling for it and will probably fit a bottle heater at some stage too.

:yes:

I know I've still got some work to do but whilst I get to that I have been playing with the power settings to get a feel for it, what baseline settings would you recommend I start with, eg power, build time and delay time for the 1st gear and then for the other 5 gears.

Keep it simple and start with 25 jets. Starting in this way allows for finding any hidden gremlins, allow you to adapt to using the system, and if you do happen to make a mistake, then the chances of damage occurring is minimal.

Keep start power at 100% throughout all gears and power points; build time can be set to the max; 0 delay, unless you have traction issues.


Am i correct that the delay time setting for the 1st gear is to slightly delay the delivery of the nitrous to prevent an overly lean mixture and what sort of figure should I start with, bearing in mind the engine in question? Thanks

That delay is for the overall activation of the system: it allows for vehicles with traction issues or weak drive train components to get rolling before adding more power. You need to go into the 'System' menu to access the nitrous/fuel delays. You can set it to the minimum to 100 milliseconds nitrous delay for 25 jets and for short pipe lengths. If you have long pipe lengths, then more delay may be needed once the power is stepped up.

Overall, the settings all depend on what you feel the car needs and how it responds. You have the ability to decide what you want it to do with the Max Extreme, you pretty much have god-like power at this point. You just have to learn to how to use your power 8)

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