twin air injectors
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#8
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Originally Posted by LS35A
Twin air injectors are used by people who are only concerned with how it
looks or the bling factor or those who have ahmed brown noses
All IMO of course.
looks or the bling factor or those who have ahmed brown noses
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All IMO of course.
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JonnyBravo,
LOL, MY opinion is based on practical experience with all types of
electronic boost control and obviously personal preference as I said,
it was my opinion.
As you seem to think otherwise to me, lets have your explanation so I
can disagree
LOL, MY opinion is based on practical experience with all types of
electronic boost control and obviously personal preference as I said,
it was my opinion.
As you seem to think otherwise to me, lets have your explanation so I
can disagree
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Simon, my drive in-drive out price was extremely good, and I'm happy to let Harvey fit what he sees as fit for the job ![Raz](https://passionford.com/forum/images/smilies/tongue.gif)
IIRC, the single injector only came about due to people either not knowing what gas injector to use or because of supply issues with said injector.
I answered the chap's question so why do you have to pollute the thread with your embittered drivel? If he'd asked for the single air injector, I'd have pointed him in Stu or DazC's direction
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IIRC, the single injector only came about due to people either not knowing what gas injector to use or because of supply issues with said injector.
I answered the chap's question so why do you have to pollute the thread with your embittered drivel? If he'd asked for the single air injector, I'd have pointed him in Stu or DazC's direction
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Billabong,
WTF, where did that come from LOL
My comment was a bit of my personal opinion and a bit of banter.
And if you re read - Single injectors were mentioned way before by a
few people before I brought it up...
Or are you saying, that only your opinion counts
Lighten up
WTF, where did that come from LOL
My comment was a bit of my personal opinion and a bit of banter.
And if you re read - Single injectors were mentioned way before by a
few people before I brought it up...
Or are you saying, that only your opinion counts
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Lighten up
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#16
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Probably best I dont explain as I'll make a complete fool out of myself
Its a Subaru tuner that has been playing with them as I was talking to one of his customers about my Yb and whilst waiting for him to start slagging air injectors off like normal he said how good the results were he was getting using them on his own car.
Ofcourse you should know and possibly you like many understand why boost controllers are better than air injectors but everyone has a different way of doing things and as we know not everyone agrees with everything you do
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Its a Subaru tuner that has been playing with them as I was talking to one of his customers about my Yb and whilst waiting for him to start slagging air injectors off like normal he said how good the results were he was getting using them on his own car.
Ofcourse you should know and possibly you like many understand why boost controllers are better than air injectors but everyone has a different way of doing things and as we know not everyone agrees with everything you do
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I wasn't offering an opinion in my first post, just the information the guy asked for
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Maybe you should tell the guy he may need to have his boost curve re-calibrated if he uses the single type, IF he's already had a map that utilises the twin type?
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Maybe you should tell the guy he may need to have his boost curve re-calibrated if he uses the single type, IF he's already had a map that utilises the twin type?
#20
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Not so sure about stuck in the past really.
I noticed the DCY Evo track car that was on the cover on one of the Jap mags the other day is running T6 and twin air inj.
I noticed the DCY Evo track car that was on the cover on one of the Jap mags the other day is running T6 and twin air inj.
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What are we playing, Top Trumps?
I don't claim to know everything
feel free to enlighten me if you like
(especially if it help The menace to make an informed decision).
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I don't claim to know everything
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Billabong,
I am fully aware you are clued up and have never considered you ignorant.
May be miss informed
(that was a joke)
Less parts are always better for reliability and cost.
I am sure if you have them on your car and are happy with there
performance then I am pleased for you. I never said they didnt do the job.
Just think how much of the cost of them went towards Mr Gibbs Porsche (or his tax bill)
(another lame joke I know)
I am fully aware you are clued up and have never considered you ignorant.
May be miss informed
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Less parts are always better for reliability and cost.
I am sure if you have them on your car and are happy with there
performance then I am pleased for you. I never said they didnt do the job.
Just think how much of the cost of them went towards Mr Gibbs Porsche (or his tax bill)
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(another lame joke I know)
#26
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Originally Posted by LS35A
Less parts are always better for reliability and cost.
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Thanks for the advice and contacts everyone
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I feel cheated now
, I was expecting an essay about TFC & boost control
If my extreme value for money bill helped pay for one of Harvey's two AMG Merc's then I'm happy to have contributed in a small way - I don't expect people to work for nothing
Wasn't aware he'd bought another Porker
, I'll have to make up an excuse to go and see him now as he did his job so well, I only have to visit them for servicing
Apologies to UnseenMenace for hijacking your thread
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If my extreme value for money bill helped pay for one of Harvey's two AMG Merc's then I'm happy to have contributed in a small way - I don't expect people to work for nothing
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Wasn't aware he'd bought another Porker
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Apologies to UnseenMenace for hijacking your thread
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#28
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Originally Posted by Billabong
I feel cheated now
, I was expecting an essay about TFC & boost control
Apologies to UnseenMenace for hijacking your thread![Red Faced](https://passionford.com/forum/images/smilies/icon_redface.gif)
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Apologies to UnseenMenace for hijacking your thread
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#30
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Grp A cars used to double up on vital stuff (on a redundancy basis) in case something fails. e.g. 2 MAP sensors etc. so expect WRC do the same where allowed?
#31
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Originally Posted by Paul Ripley
WRC's use four air injectors don't they? 2xtwins
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phase and anti-phase injectors
#36
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Originally Posted by bigchez
what are air injectors for? i realise for injecting air, but for what purpose?
What Are Air Injectors?
Air injectors, are, as they sound, a set of injectors that inject air instead of fuel. They are commonly used to control the boost pressure output by a turbocharger.
What do they look like?
There are various types available, but the most common ones are as follows.
![](https://img.photobucket.com/albums/0603/stu@mdevelopments/Engines%20etc/airinj.jpg)
There are however many types available nowadays, including ones that only run a single injector.
How do they work?
The air injectors have an input to the top of them from the turbocharger and an output on the bottom to the wastegate. The injectors are wired to the ecu so they can be controlled.
The ecu air injector map is mapped against boost, rpm and air temperature. The injectors initially stay closed, keeping the wastegate closed too, encouraging the turbo to spin to speed as fast as possible. When the desired turbocharger pressure is aquired during mapping, the injectors are pulsed so that they open at that point, allowing air to flow to the wastegate. This of course opens the gate, bypassing some exhaust gas from the turbine wheel, slowing the compressor and leveling or dropping the boost pressure depending entirely of course on how much air we allow through. The beauty of this system is we can use a relatively weak actuator to achieve very large boost levels and we can accurately program boost curves into the system.
Any downsides?
Yes, if the injectors fail, due to the “Bleed On” configuration, the turbo will run whatever boost it can until something either stops it or something fails due to the fact we have blocked the pipe to the actuator.
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Is there any reason why you couldn't use air injectors in the same way as an amal valve with injectors bleeding out air (controlled by the ecu) from the feed to the actuator, rather than feeding air to the actuator? This would mean the system failed safe, but potentially allow more control than an amal valve (as the range of flow would be greater)?
#40
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no reason why you cant,,,, and ive tried it
but the reason for using air to air boost control is that the actuator doesnt see any pressure untill you want it, this stops the wastegate creeping open
but the reason for using air to air boost control is that the actuator doesnt see any pressure untill you want it, this stops the wastegate creeping open
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