Has anyone successfully used a manual or electronic boost controller?
08-28-2001, 09:16 AM
#17
Don't get me wrong, the piggy back electronics offer great value for low cost...
Especially when programmable ECU packages cost 1,000's of dollar and are not easy to impelement.
In a perfect world, money wouldn't matter, and everyone would buy the *best* product, not the best for what you can afford.
And I'm not saying that piggyback electronics are bad, just that they are what they are. After about 3-5 of them, one should consider how much more piggybacking is available, and just go with a clean and fully programmable ECU.
And trust me, many Japanese cars scare the hell out of me, especially if I see a (insert Supra/RX7/3000GT/Eclipse here) with some dash mounted piggyback electronics.
It's just not so in the Audi, and I was trying to make that point to DrSmile...
In a perfect world, money wouldn't matter, and everyone would buy the *best* product, not the best for what you can afford.
And I'm not saying that piggyback electronics are bad, just that they are what they are. After about 3-5 of them, one should consider how much more piggybacking is available, and just go with a clean and fully programmable ECU.
And trust me, many Japanese cars scare the hell out of me, especially if I see a (insert Supra/RX7/3000GT/Eclipse here) with some dash mounted piggyback electronics.
It's just not so in the Audi, and I was trying to make that point to DrSmile...
08-28-2001, 09:59 AM
#18
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A few comments:
The most common Japanese turbo car you'll come across --- Talons/Eclipses
--- use blow off valves (this is the generic term) to dump excess pressure
caused when the throttle plate closes. The air is dumped into the intake
after the MAF but before the impeller (turbo comes after MAF), not vented to
atmosphere. I believe some other Japanese turbo engines use a similar
setup.
The "piggy back units" as you call them are in fact part of the majority of
street-driven fast Talons and Eclipses. They are cheap, easy to use, and
above all, adjustable! And they can be as simple as a <$100 manual boost
controller. The biggest pain in the *** of my S4 is that so many things are
controlled by the ECU. It makes for a sterile experience compared to
tinkering and getting my hands dirty with my Talon. In my opinion.
Rory
'97 Talon awd (with piggy back units)
'01 S4 (chip)
--- use blow off valves (this is the generic term) to dump excess pressure
caused when the throttle plate closes. The air is dumped into the intake
after the MAF but before the impeller (turbo comes after MAF), not vented to
atmosphere. I believe some other Japanese turbo engines use a similar
setup.
The "piggy back units" as you call them are in fact part of the majority of
street-driven fast Talons and Eclipses. They are cheap, easy to use, and
above all, adjustable! And they can be as simple as a <$100 manual boost
controller. The biggest pain in the *** of my S4 is that so many things are
controlled by the ECU. It makes for a sterile experience compared to
tinkering and getting my hands dirty with my Talon. In my opinion.
Rory
'97 Talon awd (with piggy back units)
'01 S4 (chip)
08-28-2001, 10:04 AM
#19
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Most people
Will dump into the atmosphere after upgrading their BOVs. There is no need to shoot back into the intake once the AFC or VPC has been installed on the vehicle.
Take a look at all the mags and stuff. This is from personal experience as well.
Take a look at all the mags and stuff. This is from personal experience as well.
08-28-2001, 10:23 AM
#20
I didn't disagree with you...
Read <a href="https://forums.audiworld.com/s4/msgs/461119.phtml">this...</a>
I know that piggyback units are good for the cost, I'm not saying they aren't. I know that many people use them, succesfully as well.
I'm just saying that in the S4, this (as you clearly agree) isn't the case.
I'm also saying that having an ECU control all of these things (in my opinion) isn't a bad thing.
That's why I mentioned that some (not all) people who are tuning Japanese turbo cars opt to go the fully programmable ECU option. From what I've read and seen, it's a high cost option that gives maximum flexibility.
The piggyback units offer easy to use, low cost ways of adjusting things. I never said they were any less.
And you can "tinker and get your hands dirty" even more with a fully programmable ECU package.
It's all about the dollars.
FWIW
I know that piggyback units are good for the cost, I'm not saying they aren't. I know that many people use them, succesfully as well.
I'm just saying that in the S4, this (as you clearly agree) isn't the case.
I'm also saying that having an ECU control all of these things (in my opinion) isn't a bad thing.
That's why I mentioned that some (not all) people who are tuning Japanese turbo cars opt to go the fully programmable ECU option. From what I've read and seen, it's a high cost option that gives maximum flexibility.
The piggyback units offer easy to use, low cost ways of adjusting things. I never said they were any less.
And you can "tinker and get your hands dirty" even more with a fully programmable ECU package.
It's all about the dollars.
FWIW