Putting single point dizzy or better yet, Petronix on auto tranny Z

[landmizzle]

Hi all,

Well, I've only had my new '72 240Z for a couple of days now and I've already discovered numerous things about her that set her apart from manual transmission cars (she has an automatic transmission). One of those things is a dual point distributor.

I was talking to my mechanic about this and he said that this was an emissions thing and suggested that I just drop in a single point dizzy for simplicity of maintenance.

Has anyone done this before? Would it actually work? Additonally, if I had a single point dizzy in there, then could I not take the next step of putting a Petronix ignition in the single point dizzy? I can't put a Petronix in there now because an ignition unit is made for the dual point dizzy's.

Best Regards,

Landmizzle '71 and '72 240Z

[zed240au]

would have to think it would be an easy conversion putting single point dizzy and then upgrading to the electronic never done it my self on nissan 6 have changed both of my rotarys to later electronic dizzys and was amazed at the power improvement so i would think it would be a good power move and good for reliability

Mick

[lordbiotree]

what's advantages of converting to electronic dizzys? I have a 71 series I with a duel point dizzy from a 72 auto.

Thanx for your input,

Brandon

[landmizzle]

Hi Brandon,

I've put a Petronix ignition on both my 66 Mustang and my '71 240Z. Really, the main advantange is ease of maintenance. You won't have to to deal with points anymore. Dwell angle is constant and does not need to be dealt with.

Some/many folks will claim performance increases. I've not seen any effects on performance in the cases of my cars. YMMV.

I also like the Petronix units in particular because it keeps a stock look. Most people won't be able to tell you changed anything.

The dual points that Nissan put on the automatic tranny equiped 240Z and I believe the 260Z, were not done for performance reasons but rather emissions. In your case, on your '71, the dual points won't help you any. Probably won't hurt either, it's just more complicated to tune.

Best Regards,

Landmizzle '71 and '72 240Z

Originally posted by lordbiotree

what's advantages of converting to electronic dizzys? I have a 71 series I with a duel point dizzy from a 72 auto.

Thanx for your input,

Brandon

[Daniel]

The haynes 240 manual gives a good explanation.It is for emissions.The potiental "gotcha"is that it shows a temp sensor that triggers a relay to decide which point will be the active set(one is advanced the other retarded)I have no doubt that a single can be installed I just don't know if the sensor /relay needs to be worked around.

[beandip]

I just dumped my stock duel points ignition and in stalled a electronic ignition from a '79 280 zx and it works first rate. If you go this route be sure you get the shaft part the dist, bolts to other wise you wont be able to time the engine. Go to this site there is a great deal of info. here geocities.com/zgarage2001/engine.html