I've used a vac dizzy with that cam in a 350. Ran full manifold vacuum and worked very well.

Howdy,
i probably did ask about vacuum a while ago as have been pondering and reading up on it. Cash is tight, but I still want to get to as many shows as possible this year so the piggy bank gets it.

I've read some good tech stuff re; idle / low load, which is what the engine does most the time.

I got the twin point dizzy years ago without realising it works best at the track etc.
I'd never thought to pull in the mechanical part to allow more initial. Currently no more than 10 initial. It doesn't like more than 34 total on premium and has knocked under heavy load.
Mind, I think that would be a bit of a compromise and if the tuning guys can get more with a wider range that vac allows then so be it.

Cheers
Jimbo

MSD every time unless I was looking for an old school look then it's a Mallory 47 series with a petronix unit in it.

I wondered why you had no vacuum but sure you discussed it on here a while back Jim?

I'll confuse you even more. I've put a Pertronix Ignitor kit in a GM body in my W block Chevy and an MSD Pro Billet distributor in my small block. Have used a few MSD ones in the past as well. I think both are good quality. If I were in your position and buying new I would go for the MSD Pro Billet, their Streetfire is a cheaper quality. Make sure that you have good connections on everything, especially earth's, whatever you go for.
The one thing I will not personally use these days is Mallory.

For maximum fuel economy you should always use vac advance distributor. At light load such as cruising on the motorway engines run more economically with maximum ignition lead.. if possible change your distributor to a vac type

Originally Posted by satan

just stick a pertronix igniter 2 in the mallory. works well with what you have.

I second that fitted it in mine (mallory Dual Point) years ago and never checked it since, tho mine has the vac advance with a curve kit etc but still been trouble free motoring since day one

Originally Posted by Kustom Jim

Hi all,

To get the most hp and mpg from the 383 on a rolling road tune up in the near future I'm looking for advice on the best brand distributor upgrade.

383, approx 10:1, Edelbrock package, comp cam XE268, MSD6AL, Mallory twin point nil vac dizzy.

It looks like Pertronix and MSD have similar modern contactless distributors that can work with 6AL and be good for proper tuning.

Anyone had any experience of either?
Google has mixed opinions - it's hard earned wonga so need to get it right first time.
Shakey here we come!!!

Cheers
Jimbo

just stick a pertronix igniter 2 in the mallory. works well with what you have.

SBC distributor upgrade choice?

Hi all,

To get the most hp and mpg from the 383 on a rolling road tune up in the near future I'm looking for advice on the best brand distributor upgrade.

383, approx 10:1, Edelbrock package, comp cam XE268, MSD6AL, Mallory twin point nil vac dizzy.

It looks like Pertronix and MSD have similar modern contactless distributors that can work with 6AL and be good for proper tuning.

Anyone had any experience of either?
Google has mixed opinions - it's hard earned wonga so need to get it right first time.
Shakey here we come!!!

Cheers
Jimbo