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Location:
Newcastle NSW
Registered:
June 2002
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 Any GZE drivers i got a Question?
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Thu, 25 March 2004 23:28
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just got my gze installed and running in my AE82 i have noticed it overrevs between gears? it actually picks up 2-300 rpm for a second or so.
is this normal or have i got a bug in the system. i do have a 3SGE TB installed which is 3-4mm bigger but it doesnt have the idle controller so lucky i dont have aircon or powersteering..
any ideas?
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Location:
Melbourne
Registered:
August 2003
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Re: Any GZE drivers i got a Question?
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Fri, 26 March 2004 05:53
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This is normal. If you increase the length of your post-throttle intake, you increase the amount of intake charge which must be consumed before the tract falls into vacuum and idle conditions. So when the throttle snaps closed it takes a moment to affect the engine speed.
I've assumed that your throttle is now before the S/C, whereas before it would have been at the manifold (in 4A-G) or at the carburettor (4A-C). Correct me if I'm wrong.
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Location:
Adelaide
Registered:
May 2002
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Re: Any GZE drivers i got a Question?
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Fri, 26 March 2004 06:29
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areyou running the stock blowoff valve? the the car now have a front mount intercooler? because the air has no where to go its normal to fill it pick up revs between gears.
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Location:
sydney
Registered:
March 2004
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Re: Any GZE drivers i got a Question?
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Fri, 26 March 2004 08:26
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my car duz the same thing never thought it was a problem though
like if i decided to shift at 5000rpm, i let go of pedal and clutch in and it jumps to bout 5300-5500rpm
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Location:
Newcastle NSW
Registered:
June 2002
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Re: Any GZE drivers i got a Question?
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Fri, 26 March 2004 13:05
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yes i am runing a front mount Galant VR4 cooler and the stock bypass valve, i dont really see this as a major problem just gotta be a little bit careful as it can make u look like a bad driver even when your not. has anyone overcome this problem by venting exess pressure to atmosphere or any other way?
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Location:
Canberra, ACT
Registered:
May 2002
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Re: Any GZE drivers i got a Question?
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Sat, 27 March 2004 08:13
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mine does it as well. I just take a little bit longer to put the clutch in and it doesn't overrev at all, when I'm giving it a bit and changing gears fast it does it tho, can't really be avoided I guess..
-Andrew
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Location:
Castlemaine Vic
Registered:
November 2002
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Re: Any GZE drivers i got a Question?
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Sat, 27 March 2004 09:22
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its just a gze thing i think, its also cos the s/c is still spinning isnt it? like its not going to be able to stop with a click of a finger ya know..
i think everyones gze does it...
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Location:
Rosanna, Melb
Registered:
June 2002
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Re: Any GZE drivers i got a Question?
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Sun, 28 March 2004 11:26
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As said first off it is all about the length of the inlet tract AFTER the throttle body. When you get off the accelerator the TB snaps shut but the engine can still use all the air that is in your intercooler, piping and intake manifold, and the engine is unloaded since you are on the clutch, the revs rise.
Happens to all of them, especially with a front mount as that increases the post-TB volume. And yeah, you do sound a bit like an L-plater, but I can live with that.
Hen
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Location:
NSW
Registered:
September 2003
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Re: Any GZE drivers i got a Question?
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Mon, 29 March 2004 03:32
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Thats the beautiful free-spinning nature of the 4ag internals... they just do that!
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