What is z difference between:

[78 280zcar]

Hello ya all, I have a question about my car. I wanted to get a distributor for my car and I have the D6F4-03 distributor and was wondering if anyone knew if I could use the d6f5-02 instead. Thanks, any info would be great.

[george71z]

From the info I found, the difference will be in the vacuum advance. The D6F4-03 needs 7.9" of vacuum to start the plunger and has 7.5 deg. of advance max. @ 13.8". The D6F5-02 needs 5.9" to start the plunger, and has 9 deg. of advance max. @ 11.6" of vacuum. If my interpretation is right, the -02 has a quicker advance and advances more at less vacuum. Hope this helps.

[78 280zcar]

Do you think that I could just use the vacuum advance from my distributor and put it on the -02. Thanks for the info.

[Zedrally]

You can change/swap over the vaccuum advance. This difference between the 2 is actually in the springs, these are the items that determine your advance. As long as you change them over your advance should be the same.

MOM

[78 280zcar]

Right on, because I just bought one off of ebay, on mine the plastic part of the vacuum advance broke and it was not advancing, all of the balls that are mounted in the plastic were floating around inside of the distributor and I could'nt really afford 100.00 for a new distributor . But, thanks for the advice guys/gals

[Gav240z]

Please do me a favour and keep your old distributor there is a good chance your new one will have the same problem it is a common problem with these distributors and there are ways of fabricating a much better system than the ball bearing cage.

You should also look at possibly getting your distributor mapped to your cam so you don't have vacuum advance instead it's all mechanical.