Skip to content
Aussieveedubbers

accufire dwell angle

0 likes
Share Share on Facebook Share on X Share on Reddit
Log in to reply

76camper Fahrvergnugen

884 posts · joined Jan 2005 ·

#465222
Installed my empi accufire kit (elect ign) a while ago. After i installed it i measured the dwell and set timing. Dwell was reading around 25 degrees at idle, measured on my new 2nd hand dwell meter. I thought the meter was buggered and forgot about the prob coz bus was running fine. Today i thought i would have another go and measured the dwell. Same, 25 degrees at idle. I then reved the engine and the dwell went to around 60 degrees at 2500-3000rpm.

Have i got the dwell meter hooked up wrong?

How can i adjust the dwell on my accufire kit? I thought it was fixed and found this page, http://www.ratwell.com/technical/PertronixAdjust.html

Tried to raise the rotor plate a bit but didnt do much... any ideas ?

how should i have the dwell meter hooked up? Got one black wire and one red.

can i adjust the dwell on the accufire kit??

cheers
http://www.bytevision.com.au/dee/kombi/index.htm

tassupervee That really hurts doesnt it!

1,171 posts · joined Sep 2003 ·

#465227
Id suggest you might have the dwell meter set on the wrong range. Ie: 6cyl or perhaps 8cyl.

Messing with electronic systems to reap a couple of degrees of dwell here and there is close to (no pun) pointless!

Set your timing, put your dwell meter away and enjoy the fact that thats the last time you ever need to set points and timing again unless it loosens itself off or you remove the dizzy for whatever reason.

L8tr
E
Im not a complete idiot, quite a few parts are missing....

modulus Veteran Volks Folk

2,009 posts · joined Jul 2003 ·

#465232
Usually red lead to negative, black to engine ground. Check that the dwell meter (if it's thae tach/dwell type is set to Dwell.

Dwell angle shouldn't vary with RPM (dwell *time* decreases with + RPM, of course). When measured correctly, varying dwell angle usually indicates the distributor is ready for rebushing, but even a bad one won't go 25-60 degrees! P-ossibly your hookup is not right.

With the accufire, you should be looking for 50+ degrees, but the actual number is not as critical as with mechanical points.

If you get some useful, repeatable results, write a little tech article on how to set dwell on electronic ignitions; I'm sure lots of folk would like to know.

[While I was composing my deathless prose, Tas snuck in with, arguably, a better answer - don't sweat it]

hth

[ Edited on 17-3-06 by modulus ]
Peter Hill
1975 Type 2 Double Cab
modulus.com.au

76camper Fahrvergnugen

884 posts · joined Jan 2005 ·

#465237
hehe, thanks guyz. The bus is running fine so something sus is going on. Am loving not having to set points or timing 😀. Next ignition mod i think will be the universal high energy discharge kit from jaycar. $95 with some pretty nifty features.

As for the settings on the dwell meter, it has only a dwell/ tach switch. tachometer function works fine... and has two scales for both dwell and tach, one for 4cyl and one for 6. Then bottom right of scale says, 8cyl=4cyl X 1/2.

thanks for the replies and as modulus said, be intresting to see if dwell is adjustable some how!
http://www.bytevision.com.au/dee/kombi/index.htm

tassupervee That really hurts doesnt it!

1,171 posts · joined Sep 2003 ·

#465255
Nah apart from the chicanery mentioned in that article you pointed out, the dwell is set at a given figure and is for all intentions and purposes, not adjustable.

Adjusting the dwell requires some pretty sophisticated electronics changes and your system will be sealed and dwell will be fixed.
Unless you can find a setscrew or a knob labelled "Dwell Adjust" dont worry about it! LOL

Enjoy.
L8tr
E
Im not a complete idiot, quite a few parts are missing....

tangblog Learner Dubber

11 posts · joined Apr 2005 ·

#469890
Hi Camper 76,
The electronic dizzy module is meant to have a variable dwell reading it changes from 30 degrees at low rpm up to around 55 degrees under load thus giving you the best dwell angle for your situation. Just be care full with this type of module and dont ever leave you ignition on with out starting the car as it will over heat the coil and then fry the module and then nothing works.

koolkarmakombi enkarmarising

2,078 posts · joined Jun 2003 ·

#469930
What tang said....

ps whats all the gizmos about with the jaycar kit?
This disclaimer does not reflect the thoughts or opinions of either myself, my company, my friends, or my dog: don't quote me on that; don't quote me on anything; this disclaimer is subject to change without notice; text is slightly enlarged to show detail; resemblance to actual persons, living or dead, is unintentional and coincidental; dry clean only; do not bend, fold, or mutilate; anchovies or jalapenos added to this disclaimer upon request; your mileage may vary; no substitutions are allowed; for a limited time only while supplies last; offer void where prohibited; this disclaimer is provided "as is" without any warranties expressed or implied

76camper Fahrvergnugen

884 posts · joined Jan 2005 ·

#469980
Universal High-Energy Electronic Ignition System. available from Jaycar for $95
Features:
slectable dwell period
Coil shut down when engine is not running
Dwell extension with low battery voltage
minimum spark duration of 1ms
two points debounce periods (counteracts points bounce on points ignition systems)
anti theft ignition disable switch option
optional inverted trigger signal operation

Input Triggers:
Reluctor
optical
hall effect (accufire, pertronix etc)
ECU

maybe give it a search on google or something, my dentist photocopied an article from a car magazine featuring the kit... looks the goods to me
http://www.bytevision.com.au/dee/kombi/index.htm