| Author | Topic |
|---|
Location:
Colyton, NSW
Registered:
May 2002
|
|
WARNING - to all 4A-GZE ppl
|
Mon, 30 September 2002 06:56
|
 |
dont put a switch for the supercharger ...
I just got told by my mechanic that my clutch has been wipped clean...
i guess thats from flicking the switch when at 4-5 grand...
the stress on the charger must have killed the poor bugger..
that and the bearings had seized...
so i guess that little mod just cost me $350 + labour
|
|
|
Location:
cambo
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Mon, 30 September 2002 07:13
|
|
i coulda told ya that, shoulda asked before you did it 
|
|
|
Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Mon, 30 September 2002 08:57
|
|
|
I think he did make it known that he was putting a switch on, & no one made any objections or gave any warnings.
|
|
|
Location:
Camden
Registered:
July 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Mon, 30 September 2002 10:28
|
|
How can the 4AGZE supercharger clutch be wiped clean?
remember that it is a electromagnetic clutch.
|
|
|
Location:
Colyton, NSW
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Mon, 30 September 2002 10:33
|
|
ok well i was on the phone to a customer when my mechanic called... i was having 2 coversations at one time without either knowing...
needless to say i picked up every second word....
so i am picking it up and will post some pics tomorrow....
with a proper discription
|
|
|
Location:
Newcastle, NSW, Australia
Registered:
May 2002
|
|
|
Location:
Camden
Registered:
July 2002
|
|
Re: Blower Clutch
|
Tue, 01 October 2002 05:42
|
|
Thanks Grant, i just thought the clutch just used magnets for the attraction of both the faces.
thanks mate 
|
|
|
Location:
Adelaide
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Tue, 01 October 2002 05:51
|
|
ok, I have been considering adding one of these sc to my 2tg and I was told by my mechanics that they woudl set it up with a microwsxitch so that when it got to 1/2 throttle it would switch on the sc..... they were telling me that having the sc making boost at idle is not a good thing, too much air or something, so I dunno what the actual 4agze is setup but what does it do at idle ??
would it be ok to have a microswitch on it so that it turned on at 1/2 throttle or something or would it be better to have it come on the second you touch the throttle but have a switch on the dash like this person did so I could turn it on and off.... but not switch it on while taking off from the lights getting done in a drag and thinking I need boost, switch it on before hand ??
help would be appreciated, new to s/c
Brendon
|
|
|
Location:
cambo
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Tue, 01 October 2002 07:47
|
|
|
i really am only taking a stab in the dark here, but i THINK the charger is not always engaged, it engages when there is a load. i think your mechanic is wrong when saying there should be a switch for half throttle cause i somehow doubt that toyota would make an engine that would fuck up at idle. im sure they thought of all the little problems before they released the engine.
|
|
|
Location:
Adelaide
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Tue, 01 October 2002 08:00
|
|
ok, you just said that it wopuld engage when it's under load, which I presume woulda been senced by the MAP sensor in the 4agze ecu right ??
but also the engine would have any load at idle therefore it wouldn't be making boost....
I think the idea my mechanic was trying to get at with the microswitch at 1/2 throttle was supposed to be like a load sensor, at 1/2 throttle there would be more load on the engine than there would be if you were at 1/4 throttle....
I dunno.. this is the logical side of things I can see at the moment, but everyone is conctantly learning...
Brendon
|
|
|
Location:
Camden
Registered:
July 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Tue, 01 October 2002 08:27
|
|
|
i know for a fact that when at idle, the supercharger isnt boosting. When you have a boost gauge set up on your gze then needle is in the vac position thus making no boost. When you turn the supercharger off, the boost gauge is always in the vac.
|
|
|
Location:
Colyton, NSW
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Tue, 01 October 2002 08:45
|
|
hi guys...
just a bit of a thing for u ... i can drive and stay in gear all the way to 6500 rpm and not even boost.... ie go past 0 on my boost gauge...
a bit of a update
i got a second hand charger.. a bit of wear on the clutch...
my original clutch... wow.. now that is one worn piece of metal... deep ass grooves .. metal filings all through it...
the teeth in the clutch that when engaged spins the rollers in the charger .. well the first section.. about 5mm was comletely stripped.. then back after that.. the teeth were slight tapered to one side...
i will be posting pics tomorrow of both new and old chargers .. and insides...
|
|
|
Location:
Montrose, VIC
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Tue, 01 October 2002 08:51
|
|
On a 4agze, there is a bypass valve that opens when there is vacuum in the manifold. Also, when there is vacuum in the manifold the ECU disengages the clutch, because it would be largely pointless having it spinning with a bypass valve open, although it won't really do any harm as such. Many aftermarket blower installations use 1 or more blow off valves as bypass valves and dont bother with a clutch on the blower.
Another thing to remember if you're planning on putting the blower on something else is that the 4agze has got the throttle BEFORE the blower, therefore a soon as you close the throttle boost is gone, and there is no boost until the throttle is open far enough to let enough air in. This is why I laugh when I see some goose has gone a spent big $ on an aftermarket noisy valve, only to find it makes no noises...
If you have the blower before the throttle, which in some ways is a good idea, then you must remember to put a good blow off valve in there, otherwise you'll very quickly blow hoses/bend the throttle.
|
|
|
I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
|
|
|
Formerly TRD_RoLLa
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Tue, 01 October 2002 10:21
|
|
Sorry to hear that Troy.
I will learn from your mistake.
|
|
|
Location:
Sydney
Registered:
July 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Wed, 02 October 2002 01:44
|
|
Ive got a switch on mine.. and it has worked fine for 2 years.
Just dont make a habit of turning it on at high load.. ie dont have the throttle open.
The OEM computer will engauge the clutch at at preset vacuum close to atmosphere... regardless of the RPM.
ie when your crusing and its in vacuum, when you open the throttle the pressure goes from vacuum to atmosphere quickly... just before it reaches atmo the clutch engauges and then it goes into boost until it falls back just before atmo.
|
|
|
Location:
Colyton, NSW
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Wed, 02 October 2002 04:29
|
|
yeah so basically if u do it slowly.. u never reach 0 pressure and can keep off boost (supercharger clutch not engaging) while still revving...
Now we all know that im not gonna do that...
it was just an example of saving petrol... and the elimination of the sc switch...
its not necessary...
buy by all means.. put one in if u wanna...
... and yeah that was my mistake... switching under load...
|
|
|
Location:
Canada
Registered:
August 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Thu, 03 October 2002 03:31
|
|
S/C or A/C clutch does not have friction material. The small band that you see is a band of cork, used to cushion or reduce the noise when the clutch engages.
99 of 100 times, the clutch fails because the compressor locks up or is binding. I.E. do not just replace the clutch, find out what caused it to fail.
|
|
|
Club Member
Location:
Sydney, NSW
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Thu, 03 October 2002 10:32
|
|
Haha good one Troy... Could this be blamed on me though???
Remember that night when you picked me up after you finished work??? Where we went up the road hit about 70km/h and then flicked the switch on??? Oh well... Good luck with the new supercharger... Will you be by-passing the switch this time???
|
|
|
Location:
Montrose, VIC
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Thu, 03 October 2002 14:10
|
|
|
What really is the point in having a switch? Drive it gently(hah!) and GZE's can actually scrape in pretty decent economy... Oh, and drive them hard, and that tank seems to disappear quicker than you would have thought the laws of physics would allow...
|
|
|
Location:
Melb
Registered:
June 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Thu, 03 October 2002 16:00
|
|
Iv had a switch for over a yeah and it's still fine.
I just switch it at the lights or chuck the old clutch in when driving. Your a madman if you were switchinh it at like 5 grand.
|
|
|
Location:
Colyton, NSW
Registered:
May 2002
|
|
|
Location:
Colyton, NSW
Registered:
May 2002
|
|
Re: WARNING - to all 4A-GZE ppl
|
Thu, 03 October 2002 23:18
|
|
oh.. and its fine to have a switch...
just dont switch it like me...
hhehehe
i only did that cause i save dave (dnation) switching happily away.. therefore... i thought.. ok...
but ... its not ok...
i still have the switch hooked up.. all is well...
just not gonna switch at 5000...
btw... car is all ok...
lost about 2 psi...
this may be a not so tight s/c belt..
will investigate on weekend!
|
|
|
