Loadamatic and four barrel 49-53 ?

[chopnchaneled]

Looked and didn't find anything other than won't work with multiple carbs.
any one tried it?
Thanks

[Art Newland]

I wonder about this also, some Y blocks had load-a-matic... any of them a four barrel?

[51 MERC-CT]

Sometime back, ran a Holley 390 using the timed vacuum port on the carburetor, seemed to run well. But the distributor was never checked to see what it was really doing.

[BUBBAS IGNITION]

Use a "ported/timed" port on the 390 should work very well . The loadamatic only needs a small venturi signal ( 1-4 in) , depending on the engine may spark knock with too much advance ?

[scicala]

Originally Posted by Art Newland

I wonder about this also, some Y blocks had load-a-matic... any of them a four barrel?

All Y-Block V8's had Loadomatic from '52 (Lincoln only) through 1956. All carbs (two barrel and four barrel) can easily be converted to ported vacuum if using a 1957 or later distributor.


Sal

[tubman]

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Originally Posted by BUBBAS IGNITION

Use a "ported/timed" port on the 390 should work very well . The loadamatic only needs a small venturi signal ( 1-4 in) , depending on the engine may spark knock with too much advance ?

This, along with the comment from "51Merc-CT", is quite interesting. A very good thing to know for guys who just want a little more "oomph"! I was always very satisfied with the performance on the Load-a-Matic" on my '51 when it was bone stock.

[scicala]

I once worked on a '55 T-Bird 292 that had a later Holley 4 barrel on it while still using the stock Loadomatic distributor. When using the correct base timing at idle (6 BTDC) it spark knocked quite a bit on part throttle cruising.


Sal

[chopnchaneled]

Thanks All !
What all did the holley 390 come on ?
Thanks again

[5851a]

I think they were aftermarket Holley's that became popular when people started trying to get horsepower from small engines like V6's and inline 6's. You could use 2 on dual 4 barrel intake and look cool without over carbureting. There may have been oem use also. On the ported vacuum I had always thought it was full vacuum but the port is slightly above throttle blades so no vacuum at idle but regular when driving. This is just my opinion.

[34p-kup]

So what happens if I throw in Mallory dual point (was chevy, set-up by Bubba) with mechanical and vacuum advance? Where do I get the right vacuum signal?

[tubman]

Depends on the manifold you are using. Just about all of them have a port for the wipers; you can usually "tee" into that.

[34p-kup]

The carb has ported/timed and full manifold connection ports. Does the this vacuum diaphragm work same as loadamatic?

[tubman]

What kind of carburetor are you using?

[51 MERC-CT]

Originally Posted by 34p-kup

The carb has ported/timed and full manifold connection ports. Does the this vacuum diaphragm work same as loadamatic?

You would use full manifold for the Mallory dist. and timed /port for the loadamatic.

[V8 Bob]

Originally Posted by chopnchaneled

What all did the holley 390 come on ?
Thanks again

The original 390 cfm was calibrated for 4 cylinder engines, and has a special reverse power valve because of high speed vibrations in 4 cylinder engines. This is # 6299. The more common 390 designed for small 6 and 8 cylinder engines, using regular power vales, is #8007. Both are aftermarket.

[34p-kup]

Originally Posted by 51 MERC-CT

You would use full manifold for the Mallory dist. and timed /port for the loadamatic.

Thanks 51 Merc for confirmation, I tried both, that's how I have it now. Thanks V8 Bob, I was unaware of 2 versions of 390 cfm. I have #8007.