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Location:
Brisbane
Registered:
March 2003
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2TG Dwell angle
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Fri, 27 August 2004 04:15
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I got my hands on a little diagnostic analyzer for my 2tg and just out of curiosity i checked the dwell angle, now i dont know if its the analyzer thats wrong or my engine, its reading 70 on the scale for a 4yclinder engine.. according to the analayzer just under the reading of 70-90, its got a bar that says "good points" and anything from 72 down to 30 its got "bad points" but i checked the manual and it says its supposed to be 52deg?? so im not sure whats goin on here.. my car idles well, but my carbs are shithouse, got new points also. ive got a picture of the analyzer reading it, just dont know how to put pics up..
any help appreciated 
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Location:
Brisbane
Registered:
March 2003
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Re: 2TG Dwell angle
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Sun, 29 August 2004 13:35
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so nobody knows or has a slight idea? can anyone suggest another tool for measuring the dwell angle ??
thanks.
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Location:
Tasmania
Registered:
May 2002
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Re: 2TG Dwell angle
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Sun, 29 August 2004 14:27
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People should realy know this stuff, but ignition points are so old, and all the mechanics on here are so young.
I have electronic ignition on my 2T-G. But its not perfect. Maybe I need a new coil? I wonder what the dwell is fixed to with my electronic setup? I should know this stuff. sorry.
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Location:
Brisbane
Registered:
March 2003
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Re: 2TG Dwell angle
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Sun, 29 August 2004 23:27
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thanks jonny i think your right, but i am looking for the electronic ignition setup for my 2TG, saves me stuffin around with the dwell, what exactly do i need apart from a electronic dizzy from a 2TGEU,a module from the same motor, and coil? ive got a Bosch GT40R so its got a external ballast resistor, im not sure if i can use it with the electronic ignition, i heard that you can?
cheers
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Location:
Somewhere on a dirt bowl ...
Registered:
August 2004
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Re: 2TG Dwell angle
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Mon, 30 August 2004 12:28
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The dwell angle should be around the 50-54deg mark.
The dwell angle is of how long the points are open for. So that the coil can recharge for when it fires one of the spark plugs. If the points stay closed (short dwell angle) for to long the coil wont be able to store enough energy for a clean ignition. The same more-or-less applies to if the points stay open (extended dwell) for too long. The coil wont be able to fire the full charge in time.
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Location:
Brisbane
Registered:
March 2003
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Re: 2TG Dwell angle
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Mon, 30 August 2004 12:43
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so basicly the only way i can get it down to 52deg is to keep mucking around with the point gap?? but my analyzer says that my points are "good".. and its reading 70deg.. if i were to put it down to 52deg which is what the manual states it should be, it would be analyzing "bad points" how does that work? maybe i just need to get a hold of another analyzer..
cheers
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Location:
Tasmania
Registered:
May 2002
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Re: 2TG Dwell angle
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Mon, 30 August 2004 12:52
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I think with electronic ignition, the dwell is a fixed time, and not related to degrees anymore. Does anyone know what the dwel is for electronic ignition and how to check it?
SIKTA22: some 2T-GEU distributors have their own igniter inside, others don't and have a external igniter piggyback mounted on the coil. You should be able to use any coil you want still.
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Location:
Finland
Registered:
November 2002
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Re: 2TG Dwell angle
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Mon, 30 August 2004 13:51
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Does anyone know what the dwel is for electronic ignition and how to check it?
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I have 3T with electronic ignition and I did check my dwell. It was 27deg @ idle. Ignitor is *cough* motorcraft *cough* one. 
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Location:
Tasmania
Registered:
May 2002
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Re: 2TG Dwell angle
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Mon, 30 August 2004 14:04
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But your dwell is probably a fixed time, and the degrees will probably change as rpm changes. Try checking the dwell at different rpm, I think it will be different.
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Location:
Finland
Registered:
November 2002
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Re: 2TG Dwell angle
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Mon, 30 August 2004 14:12
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I dont remember what did it show at different rpm's. Only that it was 27 @ idle. Now im converting it to distributorless ignition.
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Location:
Hobart
Registered:
June 2002
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Re: 2TG Dwell angle
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Tue, 31 August 2004 02:26
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dont know what it is in these systems. But other high energy ignition systems its usually around 8-9ms i think. This is increased for starting because of the low battery voltage.
Cheers
Chris
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Location:
Brisbane
Registered:
March 2003
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Re: 2TG Dwell angle
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Tue, 31 August 2004 02:47
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Jonny2TG, i tried measuring at different RPM and it was still reading 70, it dropped to 60 at one stage in about 1sec flat and then went back up to 70, but until i get electronic ignition for my motor, i want to find out if there are any other sort of devices i can get cheap to measure the dwell angle? i know jaycar has one and its $50 but does anyone know of any cheaper?
say i left my motor as is, with it reading a dwell angle of 70, would that eventually do damage to my spark plugs?? also if it were at 52deg, would i notice an improvment in engine efficiency? acceleration, throttle response etc?
thanks.
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Location:
New Zealand
Registered:
May 2002
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Re: 2TG Dwell angle
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Tue, 31 August 2004 10:58
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your coil is charging more at 70 then at 52, and would be delivering more volts. Great.
On my 2tgeu, it used to read around 52 or 57, and it was the same with revs. Note, this is a degrees number.
Johnny, i believe you're correct that later on it is changed to ms, but you can still read it in degrees with a dwell meter.
A 4age is low at idle, and then it rises with revs... can't remember any numbers off the top of my head.
When I get my 3tc in this week, I've got 2 different ignitors that are from different generation T motors. I'll test with both of these for dwell.
And info will go up on GD website.
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Location:
Finland
Registered:
November 2002
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Re: 2TG Dwell angle
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Tue, 31 August 2004 12:56
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your coil is charging more at 70 then at 52, and would be delivering more volts. Great
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True, but 20deg for discharging is bad. Toyota has decided to use 52deg for charging and 38deg for discharging. I'd go with that.
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