The V8 Owners Forum -

Right- as the build is coming to an end I need to make sure what I do and dont need ignition wise. Although I dont mind doing basic electronics and wiring etc, I feel like a dummy sometimes so can someone give me a run down of Exactly what I need? (So glad I have stuck with a dissy!!!)

i.e. live wire to coil, whatever wires to dissy, balast resistors? (I have a '90 electronic dissy with the black box on the side and a little plug), I also have a MSD boost timing box of tricks but I can get instructions and think it just goes inline somewhere!

TC

Tom,

If you have the 35DLM8 dizzy with the amp on the side it needs a full 12v coil with no ballast resistor. The correct Lucas coil is a DLB198

Can't help with the MSD

What coil have you got as the resistance has to match the requirements of the amp.

Kevin.

Was going to buy a MSD fancy coil, not a good idea then?

Tom,

Electrics are not my strong point, I just bought a coil that matched the same dizzy that you have, I had previosly bought a Lucas sports coil that I thought would have a highr output but it didn't work with that dizzy.

Whether the MSD coil is the right spec I couldn't say.

What coil do you have at the moment?

Kevin.

My suggestion would be to get the manufacturer specced coil for that distributor.

Wiring is dead easy. +12V ignition feed to coil +ve and on to the 'black box'
Coil -ve goes to your rev counter and to the 'black box'

Chris.

topcatproduction wrote: can someone give me a run down of Exactly what I need? - i.e. live wire to coil, whatever wires to dissy, ballast resistors?

Hello Tom, Cant help with how the MSD fits in but your basic circuit will be like this:



No coil ballast resistor needed with the 12 v coil and the input signal connections to the amplifier are internal when the amp is on the side of the dissy.

Brilliant thanks guys, is there any advantage to having a MSD or Aldon "high power" coil then or should I just stick with a Lucas one (maybe in a red bull can!!!) ...and yes half of the reason for wanting one (besides possible performance gain) is looks.....

TC

Ramons circuit is for the earlier setup where the igntion amplifier was a silver box under the coil. What you have is slightly different in that the amplifier is actually on the distributor. So you still have W and W/B wires going to the amplifier, and the amplifier is grounded through the distributor body, but the R & U wires are internal to the distributor.

And you can ignore the 6.8K resistor if you wish to.

Chris.

Wow this thread is older than I thought! This is how I am wiring up the ignition now, the only thing I'm not sure about is that everyone says to put 2 ballast resistors in line with the Accel coil, yet this MSD wiring diagram says to bypass any resistor? Or am I on the wrong track?

topcatproduction wrote:Wow this thread is older than I thought! This is how I am wiring up the ignition now, the only thing I'm not sure about is that everyone says to put 2 ballast resistors in line with the Accel coil, yet this MSD wiring diagram says to bypass any resistor? Or am I on the wrong track?

I take it you've changed the distributor from the one you mentioned first?

Sorted now, MSD helped me again. I am wiring it up as a points type dissy as it it the same sort of signal as my electronic one with the amp on the side. MSD also said to use the resistor(s) and Real Steel are currently sending me another one to use in series with the Accel coil as it should have 2!

Job done, hopefully!

topcatproduction wrote:Sorted now, MSD helped me again. I am wiring it up as a points type dissy as it it the same sort of signal as my electronic one with the amp on the side. MSD also said to use the resistor(s) and Real Steel are currently sending me another one to use in series with the Accel coil as it should have 2!

Job done, hopefully!

Hi TC.
I assume you are using an MSD 5462 and not an MSD 8762.

Out of interest what did RS say about the note in their book regarding not using an Accel coil with the MSD unit?
Cheers Denis

I dont know actually I didn't ask them, it is the universal 5462 BTM not the MSD only one, as MSD confirmed it would be ok I didn't question it any more, maybe its just to cover their backs?