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Boost control


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#1
Tj0785

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What sort of boost control is best I’m not keen on manual boost controllers and would like one controlled by the ecu like a factor turbo set up would use.
So what boost controller are you using?

Sorry for all the questions but there will probably be a lot more to come
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#2
Brend4nn

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I’ve got a turbosmart e boost which is really good. Really simple to use and has 2 settings which can be low boost or high boost and changes with one click of the button.
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#3
Tj0785

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Im not fused about being able to use it to change boost settings because when it’s mapped they can set it up so it uses the cruise control stalk to change map settings.
I’ve seen this one that will fit in my air vent pod
https://rspec.co.uk/...g2i7u6u3o60t3q5

#4
IMG

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Im not fused about being able to use it to change boost settings because when it’s mapped they can set it up so it uses the cruise control stalk to change map settings.
I’ve seen this one that will fit in my air vent pod
https://rspec.co.uk/...g2i7u6u3o60t3q5


Are you saying by using the cruise control stalk you’d be able to change the level of boost? If so, how exactly is the ECU going to change the boost levels if itself doesn’t have a form of boost control built in?

#5
cuprabob

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Are you saying by using the cruise control stalk you’d be able to change the level of boost? If so, how exactly is the ECU going to change the boost levels if itself doesn’t have a form of boost control built in?


The way I read it was that the cruise control stalk allowed you to change between different maps which had different pre-programmed boost levels, so no direct control over boost.
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#6
IMG

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Are you saying by using the cruise control stalk you’d be able to change the level of boost? If so, how exactly is the ECU going to change the boost levels if itself doesn’t have a form of boost control built in?

The way I read it was that the cruise control stalk allowed you to change between different maps which had different pre-programmed boost levels, so no direct control over boost.


Which is the same way I read it which is why it doesn’t really make sense to me.

Are we saying the maps would be catered to these different levels of boost but wouldn’t actually change the boost? If so, it’d be a redundant feature unless the boost controller had the ability to switch between different boost levels (which the OP discounted earlier hence my question).

Or do the different maps actually dictate the boost required? If so, the ECU would then need to control the boost pressure itself.

This is a genuine question by the way, very intrigued as to the workings of this map.

#7
Tj0785

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It’s very common on big power 1.8ts the mapper would create a 5 different maps files loaded on to the ecu with different boost settings and using the cruise control stalk you could switch between map files so you have a more useable daily setting and a all out go for it at the flick of a switch
Or a Map with meth and without meth or launch control
Or if the misses was to use it could be switched right down this is why I would want some thing like the factory n75 boost control with is controlled by the ecu so it does alter the boost pressure plus if I can go this route it keeps the inside looking oem
Google switchable maps brings up some info and a few mappers like badger5 and unicorn offer it

Bearing in mind that this is on cars

Edited by Tj0785, 04 October 2018 - 12:02 PM.


#8
Tj0785

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Which is the same way I read it which is why it doesn’t really make sense to me. Are we saying the maps would be catered to these different levels of boost but wouldn’t actually change the boost? If so, it’d be a redundant feature unless the boost controller had the ability to switch between different boost levels (which the OP discounted earlier hence my question). Or do the different maps actually dictate the boost required? If so, the ECU would then need to control the boost pressure itself. This is a genuine question by the way, very intrigued as to the workings of this map.


Yes the boost level would change sorry I wasn’t very clear on my original post I want to go this route for changing boost levels rather than having a gauge or something stuck in the car so I can change the map settings giving a true sleeper look instead of gauges all over the place so if possible I’d like to use a factory boost control set up

#9
Tj0785

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https://www.audi-spo...le-maps.219415/ A bit better explained here

#10
IMG

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https://www.audi-spo...le-maps.219415/ A bit better explained here


Oh I completely understand switchable maps. Who is doing the map on your car? What engine management are you using? Standard? If so, as far as I’m aware there isn’t a solution which uses a n75 valve to control the boost pressure on the R32 platform. The maps generally are set up to use the MAF reading to compensate for the added boost but the car itself doesn’t use manifold pressure as a reference for the fuelling/timing. People then either leave the boost controlled by the turbo by way of the wastegate spring or adjusting the actuator or fit an external boost controller. The ECU and boost controller don’t speak to each other as such.

#11
Tj0785

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Right ok so it won’t be possible then I was hoping to keep standard ecu but looks like it will be a external boost controller map will hopefully be by badger5

Edited by Tj0785, 04 October 2018 - 12:48 PM.


#12
IMG

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Right ok so it won’t be possible then I was hoping to keep standard ecu but looks like it will be a external boost controller map will hopefully be by badger5


Double check with Bill then but to my knowledge no one has managed to get either the standard management to work with the n75 valve or the factory management from another model which has a turbo as stock working on the VR6 platform. There’s been plenty of talk about it. I seem to remember something about using the management from the old 2.7 rs4 but as always it’s easier said than done.

#13
Lionborg

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Why not just use the tried and proven solution? If your goal is around 500hp, select a 18psi spring for your wastegate and be done with it... or go with a 14 psi spring and buy a e-boost to up the boost with a button, when needed, it’s working for so many other people with a boosted R32.
Alternatively do the whole package and buy an aftermarket ecu which uses a MAP sensor instead of the stock MAF sensor
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#14
Tj0785

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I Don’t know what the tried and proven method is I don’t know anyone this that’s why I’m asking all these questions and I really appreciate all the info and help you guys are given me.
I’I’d like to get near 600 but mapping would be A pain Changing the spring between runs to find what it’s capable off but I’m not sure if I can justify spending on a stand-alone ecu to go that route but il look it to how much that will cost

#15
Lionborg

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You need to set one very important priority here. How much money you want to spend, and be realistic. I’m not saying this to talk you out of it, but you start with a goal around 480hp and now you are talking about 600hp, there’s quite the difference. If you can’t justify spending on an aftermarket ecu, and you talk about eBay manifolds, then you need to work out what you want to do. 600hp is possible on stock ecu with a good tune, but I’d say that’s the point where you go stand-alone ecu. Other then that, 600hp will need forged rods at minimum, and a very strong clutch, twin or triple disc. And then there’s the gearbox... you see where I’m going? 600hp is where everything starts breaking.
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#16
Tj0785

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Yeah I hear you the plan at the beginning was 2.8 gt 30 but I’ve now got a 3.2 and think the gt35 you mentioned will be the turbo. The rods will be getting done so will oil and water pumps timing chains and the forged crank you mentioned. I’d like 600 but I’d be happy with 500 but I don’t want to limit myself to 500
Realistically it could only make 450 it all depends how it’s put together The reason I asked about eBay exhaust manifold is they are all over the place so surly someone is buying them and a ported cast manifold is one of the most reliable for the ko4 turbo but then again this is a different beast. I’d be putting in to this More than what the mk5 r32 is worth and then some. When I say justify I mean if you can get the same power with or without the standalone than is it work the extra 1k to go that route

#17
IMG

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Lionborg hit the nail on the head. You need a fixed goal because an extra 100hp might just seem like a case of adding some more boost but to reliably make that extra power isn’t so simple. Both in terms of strengthening the engine and the associated parts like the drivetrain. Set yourself a rough budget and it’ll make it easier to tailor what you need for your application.

#18
Tj0785

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Yeah I get what your saying all honesty I’d be happy with anything 450 -600 hopefully closer to 600, car has been off road for 2 years just want a reliable build so to speak And it back on the road it’s just s case of buy what parts I think are best or what recommend on here because you guys are more clued up than me and I have no experience doing this and see what happens as long as it doesn’t go bang il be happy

Edited by Tj0785, 04 October 2018 - 09:20 PM.


#19
IMG

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Yeah I get what your saying all honesty I’d be happy with anything 450 -600 hopefully closer to 600, car has been off road for 2 years just want a reliable build so to speak And it back on the road it’s just s case of buy what parts I think are best or what recommend on here because you guys are more clued up than me and I have no experience doing this and see what happens as long as it doesn’t go bang il be happy


Who’s going to be doing the work exactly? As for not going bang, even engines that have been built using the best parts put together by time served engine builders have locked up the first few hours of run time. Sometimes there’s a logical reason why, sometimes there isn’t. Nature of the beast.

#20
Tj0785

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A mix of both me and the a local mechanic I know , I’m handy with the tools and do a bit on cars and he will be doing all the engine internal work and badger5 to do the mapping or is there a r32 mapping specialist I should consider?




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