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Home > A-Series EFI / Injection > MPI idle valve - on MS3

wil_h

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9258 Posts
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Betwix Harrogate and York

I love my tornado more than my MS, been a lot less hassle, and better in so many ways.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


jbelanger

1267 Posts
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Montreal, Canada

On 14th Nov, 2011 wil_h said:
I love my tornado more than my MS, been a lot less hassle, and better in so many ways.

Would you care to elaborate on this? I'm not taking a dig at anything or anyone, I'm genuinely interested in knowing what specifically is better and less of a hassle. That may help in the future.

Jean

http://www.jbperf.com/


wil_h

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Betwix Harrogate and York

Remember I only have MS1, and the following issues may no longer exist. My main gripe is having to press burn when I make a change. And I don't understand the VE table, why not just have ms? after all that's what you change.

Boost control and traction is better developed too on the Tornado.

I do however like some of the 'wizard' functions on tuner studio.

I just seem to always be fighting the MS to get it to be right. But I haven't touched the tornado since it went on the RR. I don't know what it does, but it just seems to get the AFR right more consistantly.

Also, in tuner studio, I paid the $30 for the upgrade for VE analyze live and all it did was fuck up my fuelling and make the car undrivaable. absolute shite, I was pulling my hair out.

Just my experience.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


jbelanger

1267 Posts
Member #: 831
Post Whore

Montreal, Canada

I think a lot of your issues are due to using MS1. MS2 and MS3 should be significantly better.

As for the VE table(s), this actually makes more sense in my view (but I'm biased). Using 'ms' is not better because you will have temperature correction, WBO2 feedback correction, acceleration, and a host of other corrections which mean that you will never actually use the pulse width that is in the table. Also, if you change injectors, that 'ms' table is no longer valid which is not the case of a VE table.

I think it's just a question of getting the right mind set. Does a pulse width of 6.8ms mean more to you than a VE of 76.2? Both are just numbers and you tweak them to get the correct result.

And if you use the VE analyze live correctly, it should give you good results. At least with MS2 it should.

Jean

http://www.jbperf.com/


wil_h

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Betwix Harrogate and York

I agree the advantage that using VE enables you to keep the the table, I wonder how often that happens though.

I like ms because you can look at the table and see what it says, then look at what it actually is. If it's not the same then you know to look at some compensation rather than change the map straight away.

With VE there is no target pulse width, so I find I'm chasing my tail.

Not sure how else to use analyse live, I produced a target AFR table, then set it going. I have achieved the targets manually and it's great, but stick live tuning on and it never achieves them. quite the opposite.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Paul S

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Formerly Axel

Podland


On 14th Nov, 2011 wil_h said:
I love my tornado


That's a whirlwind romance considering you have only known her for a few miles :)

Is is because you popped her fuse on the first date :)

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


minivan63

114 Posts
Member #: 9645
Advanced Member

South Wales

:)

Anyway I have spent out on the MS3 now - hope I have made the right decision! I'm pretty happy so far.

Paul are you still going to try linking the 2 injectors outputs together with the closed loop O2 control?


wil_h

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Betwix Harrogate and York

Indeed, but the fuse fault was a wiring error on my part, without the protection offered in the ECU it would be totally FUBAR. Not sure MS has similar protection againt shoving a big spike up it?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Rod S

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Rural Suffolk

On 15th Nov, 2011 wil_h said:
Not sure MS has similar protection againt shoving a big spike up it?


Slightly off topic, but if it's a V3.0 PCB I would say yes, although it uses a bank of discrete components to provide the protection rather than a single chip solution.

If anything it's probably a bit OTT, but I've replicated it on the boards I've made.

I think any problems you may read about with MS are down to DIY assembly done wrong (diodes in backwards etc.)

Schrödinger's cat - so which one am I ???


Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

I have to agree with some of that,

I too have had issues with VE live, I think its down to me not having the right lambda delay set, so it ends up adjusting a cell next to the one it should be... in my case when you snap the throttle shut it leans out all the cells in the transition from boost to overrun, so I just set it to only change the cells on boost to get around it.

Ive had a dabble with SX tune and found it hard to get to grips with, but tbh a fair amount of that was not knowing the shortcut keys, (and my brain kept trying to use the MS ones!) plus it was a TPS system which I just wasnt used to. Plus i was on a bit of a time scale,

with the MS my preference is to tune from logs, as I can do an auto tune, then scan back through the logs and double check the changes are in the direction I want.

at the end of the day though, I think you've got to expect a bit of trouble from the MS platform as it is an ongoing development project that is always going to be in a state of flux,

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



wil_h

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Betwix Harrogate and York

This thread is way off topic.

But it does offer the answer I want on the idle valve.

Looking at the Pug one the 'nob' bit does the sealing, right?

So I need a boss made with a seat for sealing. I'm thincking of maube attaching it straight to the inlet manifold.

Why has your's got two pipes on it Paul? is is so you bleed air equally to each side?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Paul S

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Formerly Axel

Podland


On 15th Nov, 2011 minivan63 said:
:)

Anyway I have spent out on the MS3 now - hope I have made the right decision! I'm pretty happy so far.

Paul are you still going to try linking the 2 injectors outputs together with the closed loop O2 control?


Maybe. Probably not a good starting point until you are familliar with the setup.

The best thing to do is getting it close to where you want it, then use closed loop to refine the result.

We used VEAL to set up the MS3 on the 998Ti. This is the result after less than an hour on the road:


No need for a rolling road to get to this standard. Still some fine tuning to do, but VEAL is the dogs. All we had to do was set the injection timing by comparing the AFRs.

On the subject of VE tables, I think it is a mindset issue. However, if you change the injectors or the fuel pressure, you just need to alter a single number, REQ_FUEL. I transfered the VE table from the 998Ti running 1900 cc/min injectors to the Miglia running 4500 cc/min (Ooo, just realised thats a gallon per minute), changed the REQ_FUEL and it was bang on to get it running.

I would suggest that Wils problems with VEAL are possibly due to the wet manifold setup and a confused wideband.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


Paul S

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Formerly Axel

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On 15th Nov, 2011 wil_h said:
Why has your's got two pipes on it Paul? is is so you bleed air equally to each side?


It's inlet and outlet. The 'nob bit sits above a seat. The 'nob moves in and out to control air drawn into the engine by the inlet manifold vacuum.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


wil_h

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Betwix Harrogate and York

ok. So one pipe goes to the engine side of the butterfly. ther other? surely that just vents to air? unless you put it back to a filtered part.

I don't think is is a wet manifold issue, all it knows is that it is a certain AFR and it needs to reach a target. It wasn't the flat out bit that was a problem though. It was the cruise and light throttle. Before I used it I had a car that drove nicely but was a little rich, afterwards I had an undrivable car which was still richer in really odd places.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Paul S

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Formerly Axel

Podland

Yes, back to post-filter or just put a small filter on the inlet.

Edited by Paul S on 15th Nov, 2011.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


minivan63

114 Posts
Member #: 9645
Advanced Member

South Wales

On the mpi manifold the other end connects onto the TB upstream so it gets filtered air. Could use a filter on the valve for NA but I guess it might boost out the inlet on turbo applications if it were open at all so would need similar plumbing.


wil_h

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Betwix Harrogate and York

Cheers. I'll give it a go then.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Paul S

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Formerly Axel

Podland

You will need the MS2 daughterboard to drive the stepper type IACV.

Edited by Paul S on 15th Nov, 2011.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


John

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Mongo

Barnsley, South Flatcapshire

With the SC throttle body could you setup some sort of servo or stepper to kick the butterfly open automatically as opposed to an IACV? Or would this not give a good idle?

If something is worth doing, it's worth doing half of.


wil_h

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Betwix Harrogate and York


oh, didn't realise that.

Right, I'll get a PWM one then, easier install, just they look a bit price. I hope my MS1 ia suitably modified to drive one. Not sure what the mod is.

On 15th Nov, 2011 Paul S said:
You will need the MS2 daughterboard to drive the stepper type IACV.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Sprocket

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Preston On The Brook




On 15th Nov, 2011 John said:
With the SC throttle body could you setup some sort of servo or stepper to kick the butterfly open automatically as opposed to an IACV? Or would this not give a good idle?


The Rover SPi and the early Rover T series engines use this method, also known as a throttle kicker, as it operates dirrectly onto the throttle, rather than bypassing it.

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


John

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Mongo

Barnsley, South Flatcapshire

I remember the kicker on my SPi. Used to idle ok. So would this principle work?

If something is worth doing, it's worth doing half of.


Paul S

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Formerly Axel

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The MS has a Fidle output that should drive a fast idle solenoid or kicker.

If you wish to use a PWM valve, you may need to add a TIP122. It's all in the MS1/Extra manuals.

EDIT: You may already be using the fidle output to drive something else though.

Edited by Paul S on 15th Nov, 2011.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


Rod S

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Formally Retired

Rural Suffolk




On 15th Nov, 2011 wil_h said:

oh, didn't realise that.

Right, I'll get a PWM one then, easier install, just they look a bit price. I hope my MS1 ia suitably modified to drive one. Not sure what the mod is.


Usually to replace the small transistor that just switches a relay with a larger one to handle the current of a PWM valve.

Again, that's assuming it's a version 3.0 PCB and assuming that MS1 uses the same circuit for PWM idle as MS2 does....

Schrödinger's cat - so which one am I ???


Paul S

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Formerly Axel

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Blimey, did you know that the MS1 is now over 10 year old technology !

Not fair to compare it with a current product really.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

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