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Are all FI distributors the same?

 
Old 03-13-2019, 03:10 PM
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jv04
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Default Are all FI distributors the same?

The quick and easy answer is NO, they are not all the same, but the question does deeper than that.

I "MAY" need to make modifications to a Rochester Fuel Injection distributor to work with my 1964 300 hp engine. Some of those modifications may be permanent,
so I do not want to make them to the original 063 distributor that came with my early 7380 unit.

So, I am wondering if any year FI distributor 57-65 will physically fit into my 1964 FI unit, and work as designed.

The distributor will need to:

connect to and supply a rotation source to operate the fuel pump in the injector
connect to and supply a rotation source to operate the distributor (did early FI distributors drive the tach, or was it the generator).

What year distributors will physically fit, and drive both the fuel pump and the distributor.

I will need to change the vacuum advance canister, the advance weights, the advance springs, and possibly modify the advance cam (the football) on top of the distributor shaft.

OK, what will work?

Is there such a thing as a aftermarket distributor for this application?

Inquiring minds....

Ed
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Old 03-13-2019, 03:24 PM
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MikeM
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See my post in your other thread.
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Old 03-13-2019, 03:30 PM
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You want a tach-drive, single point, vacuum advance FI distributor, which means starting with a '63-'65 version. All prior FI distributors are dual-point, no- vacuum advance except the 250/275 HP 283 engines, but I don't think they had a tach drive.

Replace what is likely a "724 CCW" cam assembly with a 730 CCW. This should increase the 24 centrifugal to 30 (see my previous post). A 730 CCW is likely available used from sources that rebuild distributors, so you don't have to make any permanent changes. You'll have to disassemble the dist. but you should do that anyway to clean, lubricated, and assemble to optimum 2-5 thou end play.

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Old 03-13-2019, 03:58 PM
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MikeM
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I wouldn't do anything until you try out what you have. No sense blindly jockeying around if you don't have to.

Unnecessarily jacking/jerking around with OEM parts when you don't have to does nothing but waste your time and adds confusion and chaos to the next owner that has now idea what has been done and no good way to figure it out..

Last edited by MikeM; 03-13-2019 at 03:59 PM.
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Old 03-13-2019, 04:01 PM
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PS. ED,

I installed a 7375 unit with 022 distributor on an otherwise stock '65 327/300. It ran fine on 1965 gasoline. No changes needed.
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Old 03-13-2019, 04:35 PM
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ALLLLLLLLLLLL, repeat, ALLLLLLLLLLLLLL fuel injection distributors will PHYSICALLY function with ANY, repeat, ANY FI unit. No ifs, ands, buts, or maybes.

ONLY the 908(57-early 58), 914(58-61), 990 and 011(62 only), 022(63), 063 and 070(64 and 65) distributors had BOTH the drive for the FI pump and the tachometer.
As mentioned, EXCEPT for the 63-65 FI distributors, ALLLLLLLLLL were mechanical advance WITHOUT vacuum advance.
ALLLLLLLLLLLL 63-65 FI distributors were single point (except for the transistor ignition versions------which you don't want--------I did not include those above) WITH vacuum advance.
In my book, the ideal (and best) distributor to use with FI is a 63-65 version, which has vac adv AND tach drive.

Last edited by DZAUTO; 03-13-2019 at 04:37 PM.
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Old 03-14-2019, 11:15 AM
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SWCDuke
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Originally Posted by DZAUTO View Post

In my book, the ideal (and best) distributor to use with FI is a 63-65 version, which has vac adv AND tach drive.
True, if used with any OE mechanical lifter cam or even a L-79 cam, but the short duration, low overlap 300 HP cam needs a different spark advance map... less total idle advance via a 30 degree centrifugal distributor, all in at 3000-3500 with 6-10 initial, and a B22 VAC that passes the Two-Inch Rule.

The very aggressive spark advance map used in the 30-30 cam engines would likely cause detonation with a 300 HP cam.

All the whys and wherefores are in my tuning seminar - easy search by searching for threads started by me.

Duke
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