Holding revs between gears (and more q's)
#1
06-07-2006, 11:24 AM
Holding revs between gears (and more q's)
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).
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).
#3
09-27-2006, 06:32 PM
RE: Holding revs between gears (and more q's)
so whats your question
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).
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).
#4
12-12-2006, 09:15 PM
From what I've read...
...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?
#5
12-22-2006, 12:44 PM
RE: From what I've read...
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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