timing 429/460

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Aug 7, 2002 | 08:45 AM

KJKozak2

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timing 429/460

Aug 19, 2002 | 10:11 PM

wally dog

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timing 429/460

i have a mid 70's 429/460 in a 78 bronco . my problem is what to set the timing. it has a rattle when it runs and it startes hard ,gets hot about 3/4 of the factory gage.and when it startes it somtimes starts right up other times it acts like its flooded ,ive been told by a couple of people that this is a sign that the timing is off,the oil pressure also goes up real high when its cold ,but it drops down when its warmed up ,it goes to about ,what would be 1/8 of the factory gage when idleing at warm 1/4 when driving.

Aug 19, 2002 | 10:26 PM

LxMan1

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timing 429/460

[updated:LAST EDITED ON 19-Aug-02 AT 11:30 PM (EST)]The timing should be 10 degrees btdc. This is idling about 700rpm with the vac. advance blocked off.
The flooding when hot, could be the carb getting too hot after you shut it off, causing the fuel to boil over in the carb.
It is normal for the oil pressure to drop when warm on an older engine with alot of miles on it. You may try a new sending unit to see it it stays up higher on the gauge. Or check it with a mechanical gauge and see what the actual pressure is. It should not drop below about 10lbs at an idle hot. The book calls for 35 to 40 @ 2000rpm.

Aug 19, 2002 | 11:06 PM

Mil1ion

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timing 429/460

>i have a mid 70's 429/460 in a 78 bronco . my problem is
>what to set the timing.

I think it Depends on the mileage of the engine
A high miler won't be good at spec as psrts are worn.

it has a rattle when it runs and it starts hard ,gets hot about 3/4 of the factory gauge
this can also be a *Result of Bad timing*,when you time it make sure the *vacuum hose* to the vacuum advance is disconnected and Plugged,you dont have to plug the vacuum advance port,just the hose going to it

and when it starts it somtimes starts right up other times it
>acts like its flooded
How long has this carb been in service without maintenance?

,ive been told by a couple of people
>that this is a sign that the timing is off,

the oil pressure also goes up real high when its cold ,but it drops down when its warmed up ,it goes to about ,what would be 1/8 of the
>factory gauge when idling at warm 1/4 when driving.

This is normal for an engine with many miles on it.
To be sure of what the pressure is,hookup a mechanical gauge to it

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Aug 20, 2002 | 09:54 AM

KJKozak2

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From: Cleveland, WI USA

timing 429/460

Mil1lion,

When you say "disconnect vacuum advance and plug it", do you mean:

a) disconnect hose from manifold and plug the hose
b) disconnect hose from distributor and plug the hose

Just want to make sure I understand.

Thanks!

Kevin K.

Aug 20, 2002 | 11:45 AM

Mil1ion

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timing 429/460

I guess the answer would be *B*

The other answer would be, Disconnect the hose running to the vacuum advance and plug the manifold port.

Although, The vacuum hose should be going to a port on the carburetor and not the manifold.

The idea is to disconnect the vacuum advance and have all the vacuum ports sealed so there are no vacuum leaks.

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