mallory

bones · Post by **bones** » Wed Feb 27, 2008 9:57 pm

hi all, ive got a mallory magnetic dizzy and ive lost the paperwork for it, so my question is where does the brown wire go to from the dizzy, help needed,

rich,

r2d2hp · Post by **r2d2hp** » Wed Feb 27, 2008 10:04 pm

Is this the one you have

http://www.centuryperformance.com/mallo ... rkDist.pdf

bones · Post by **bones** » Wed Feb 27, 2008 10:20 pm

thanks for the reply,i couldnt get the pic upto see if its the same as mine, its on a rover v8 sd1, i think afew people on here use the same one,

r2d2hp · Post by **r2d2hp** » Wed Feb 27, 2008 10:36 pm

It says Brown goes to Engine Ground

bones · Post by **bones** » Wed Feb 27, 2008 10:51 pm

well i connected it to the earth lead ,turned the engine over and it started to smoke, the one connected to the chassi and top of the alternator bracket, so im doing something wrong,

r2d2hp · Post by **r2d2hp** » Wed Feb 27, 2008 11:02 pm

Is this any better

bones · Post by **bones** » Wed Feb 27, 2008 11:11 pm

thats alot better thanks for that, well i did earth it but why did it start to smoke, and it melted the rubber surround, thanks for your help r2d2hp

bones · Post by **bones** » Sun Mar 02, 2008 8:05 pm

ok ,i am in desperate need of help, i connected the brown wire again to earth and it melted the wire covering again while im trying to start the engine, what am i doing wrong,

andyv8van · Post by **andyv8van** » Sun Mar 02, 2008 8:57 pm

Hi

in the diagram it says that you need to put a resistance coil in the ign feed,is this causing a problem with high voltage?you may have killed the unit already.Reading the note on the drawing.
when you turn a sd1 over you send a full voltage to the coil,is this getting a feed to the unit giving the earth problem.

Andy

bones · Post by **bones** » Thu Mar 20, 2008 1:26 pm

well i tried to start it again and it melted the earth rubber surround, i stripped the dizzy and found the the brown had melted inside and connected to the red wire, and and the brown and green are not on the right way, but it used to start ok, i put the dizzy back ,didnt connect the brown and it started straight away, good spark and everything else, what should i check, im confused and i hate electrics,

rich

Post by **Coops** » Thu Mar 20, 2008 7:15 pm

now you have sorted the wiring have you tried conecting the brown again to see if its now ok mate?

bones · Post by **bones** » Wed Mar 26, 2008 11:28 am

no i havent not yet, it used to be fine ,but now its a pain, i will try restarting it at the weekend with the brown attached, have i said i hate car electrics,

bones · Post by **bones** » Mon May 26, 2008 2:51 pm

i looked at the dizzy which is a unilite item ,i tried sucking on the vacuum and it doesnt move back the arm goes up abit, tried to adjust it but it only made it go solid, when its at its lightest it takes about 3 or 4lb of pressure to move it, how easy should it move, the plate turns easy enough, any replies welcome

rich

mgbv8 · Post by **mgbv8** » Mon May 26, 2008 3:42 pm

Rich
You will be lucky to see much movement from the vac advance unit just by sucking the pipe. If the timing is near enough it should start with the vac line off. But it may idle roughly.

Take a vac reading at idle to see if its right for the dissy specs.

You will soon see what happens when you put the vac line on and off at idle if you have a decent strobe hooked up to check the vac advance.

I had a problem with my new Mallory dissy in so far that it was giving me way to much advance at idle. And for some reason seemed to be still hanging on to vac advance at wider throttle. I pissed a round for hours with this. Then on the advise of someone here I decided to blank off the vac advance and run the dissy through the mech advance checks at the various rpms to check all was good, which it was.

So I blanked off my vac line last Xmas when the new engine was in and working. It doesnt stutter on pickup and it runs fine at idle.

I just did the same thing for Dave Tetlow. His RV8 wouldnt run smooth at about 1200 rpm when cruising at low speed in 2nd or 3rd ish. Very lumpy it was.
At idle it was making about 36 degrees of advance, and it had a slight lumpy tickover.

Took the vac line off and blanked it. Did the advance checks @ 1200 1800 2400 and 3800 rpm and the curve was as per book.

We took it out for a blast and she runs really smooth at low rpm in 3rd gear now with no lumpyness to the engine. She also picks up and runs smooth when he guns it from low rpm to the redline.

I suppose while I'm waiting for my pistons to arrive that I could investigate this further, but mine runs fine as it is with the Mallory magnetic with the vac blanked off.

FWIW ?

bones · Post by **bones** » Mon May 26, 2008 8:18 pm

thanks Perry, i will try it without the vacuum connected and block it off, the timing ive got in my book are these, do these sound right, 6 degrees at 1200 ,14 at 1800 , 18 at 2600 , 23 at 4400 , 24 at 5200, thanks again

rich