I have recently moved from a Nissan GTR to a 97 A4 1.8t 5-spd (mostly for the wife). I found all the A4s I test drove held the revs between the gears in a way I am not used to with any other turbo vehicle. Even MKIV golfs running essentially the same engine were significantly more punchy coming into boost.
I assume the A4 is designed to hold revs between gears to keep the turbo spooled. Is the turbo that antiquated that it can't handle the abuse of boost-vent-boost-vent....etc like almost all other turboed cars in the world?
Is it because the 1.8 uses a DV as opposed to a BOV? Is there a throttle body solenoid of sorts that slows throttle return? Can I remove it without harm?
What boost is considered maximum on the factory turbo and what is the likely point of failure when exceeding that?
(yea, I started searching and reading, I really did).
< Message edited by 4nick8 -- 6/7/2006 4:45:37 PM >
I have recently moved from a Nissan GTR to a 97 A4 1.8t 5-spd (mostly for the wife). I found all the A4s I test drove held the revs between the gears in a way I am not used to with any other turbo vehicle. Even MKIV golfs running essentially the same engine were significantly more punchy coming into boost.
I assume the A4 is designed to hold revs between gears to keep the turbo spooled. Is the turbo that antiquated that it can't handle the abuse of boost-vent-boost-vent....etc like almost all other turboed cars in the world?
Is it because the 1.8 uses a DV as opposed to a BOV? Is there a throttle body solenoid of sorts that slows throttle return? Can I remove it without harm?
What boost is considered maximum on the factory turbo and what is the likely point of failure when exceeding that?
(yea, I started searching and reading, I really did).
Posts: 2547
Joined: 7/18/2006 From: six zero seven, NY Status: offline
...other cars, including the 07 Civic, do this as well, apparently as a way to help with emissions. I don't know really how this works to keep emissions down, but that's what I've heard. Any ideas, anyone?
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Jeremy 99 A4 2.8QM 30v (a few things to make the car look better, sound better, stop better, and entertain passengers better)
"VTEC - all of the lag, none of the boost. It's like waiting for bad sex." (from a Z driver long ago)
Yes it is for emmision purposes. At one point in the 80's I think there were certain model cars that couldn't be sold with a manual trans because they couldn't control the emmisions when the throttle plate slammed shut because you took your foot off the throttle to shift.
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Holding revs between gears (and more q's) - 
