Holding revs between gears (and more q's) (Full Version)

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Holding revs between gears (and more q's)

  

4nick8 -> Holding revs between gears (and more q's) (6/7/2006 8:24:34 AM)

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).

  
311Style -> RE: Holding revs between gears (and more q's) (9/27/2006 3:24:40 PM)

I noticed my 2004 S4 does the same thing but it is not turbo so I am wondering if anyone else has notcied this? Is this bad? Thanks

techbod -> RE: Holding revs between gears (and more q's) (9/27/2006 3:32:45 PM)

so whats your question
quote:

ORIGINAL: 4nick8

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).


UpstateNYA4 -> From what I've read... (12/12/2006 6:15:46 PM)

...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?

veeviii2003 -> RE: From what I've read... (12/22/2006 9:44:42 AM)

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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