Inlet Manifold Gasket


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By Phil Gillespie - 13 Years Ago
1955 Customline Stock 272, 2100 Carb. Stock Distributor with pertronix 2 fitted. Reds Headers. Manual with O/drive.

Running perfect. Indication shows around 20 degrees at timing indicator when Vaccum gauge was used for best vaccum.

Fitted the inlet manifold gasket with smaller hole to eliminate paint burn off at manifold at carb base.

Should have been simple but now runs like s..t. No power.

Carb jets checked, fuel filter. Pertronix head in distributor and all connections. Nil abnormal found. Still rubbish idle and road running. All vaccum connections distributor to carb intact.

Seems I will need to go through timing again and establish best position again.

Did not expect this should happen with this simple inlet manifold gasket change.

Have i missed something?

Appreciate all assistance as prior to this was great starting, idle and highway running with overdrive in use.

Thanks,

Phil Gillespie

New Zealand

By pegleg - 13 Years Ago
Phil, Do a vacuum check. You can use "starting fluid" either to spray the intake at idle. If the idle changes, you have a leak.  Might hook up the vacuum gage and check to see if the vac. has dropped at idle, this WILL affect the advance.
By Hoosier Hurricane - 13 Years Ago
Phil:

It ran fine before the gasket change.  Ran poorly after the change.  I think you need to revisit the gasket installation.  Check for a vacuum leak as Frank suggested first.  I have used an unlit propane torch to locate a vacuum leak, be careful around the distributor with either propane or ether.  There are sparks inside the cap.

By Phil Gillespie - 13 Years Ago
Thanks for your advice Frank and John. Will do as you suggest and hopefully locate the problem.

appreciate your assistance

Phil Gillespie

By pegleg - 13 Years Ago
Phil, also, if you haven't already, get a 57 up distributor for the car.
By Phil Gillespie - 13 Years Ago
Hi Frank,

          Already have a pertronix 2 fitted in the original distributor and am happy with performance.

What could I expect with the fitted of a later distributor?

Thanks,

Phil

By charliemccraney - 13 Years Ago
The older distributor will not get the right vacuum signal from the newer carb which results in an engine that "now runs like s..t. No power." If you still have the stock distributor and want it to run right, the only fix is a '57 or newer distributor.
By pegleg - 13 Years Ago
The old distributor, assuming it's original to the car, has no mechanica advance mechanism. It operates based from various vacuum signals from the original carb, including manifold vacuum and airflow based signals. You no longer have these signals. You MUST use a distributor with mechanical advance to restore your perfomance and economy. This is one of the oldest issues with Y-blocks, been articles written about it since the late 50's. NAPA and Autozone carry rebuilt distributors for early 60's trucks, for 50-80 bucks. Get one then we'll explain how to re-curve it and you'll think you gained 100 hp. Maybe you will!!w00t
By oldcarmark - 13 Years Ago
The application you would ask for is 1964 F100 with 292.Last year the 292 was used in N.America.If you are still using the stock distributor with the later carb you will be surprised at the way it runs with the dual advance distributor.You will also need a cap and rotor for a 57-74 Ford V-8 as the later cap is bigger diameter.
By GREENBIRD56 - 13 Years Ago
Phil - You didn't by chance install the Pertronix without retiming the engine did you? The placement of the trigger in the distributor doesn't quite match the points opening - which changes the static timing. Time to drag out the timing light and vacuum gauge......  
By Phil Gillespie - 13 Years Ago
Thanks for all advice. I overthought this and made it complicated.Adjusting timing which really screwed me up.Removed plugs to check and clean. Crossed over 6&7 leads which gave a backfire through carb when eventually started.

Rechecked, got plug leads correct, used the timing light and vacum gauge now its back to where it was before smooth and sweet. The timing unit at front has shifted so only a guide as it indictes around 45. Vaccum at idle 20.

Running original distributor with 2100 Holley so all is stock. Pertronix all good.

Inlet manifold gaskets changed for units with smaller holes across carb base.Sometimes better to stop, wait think and progress instead of too much fine tuning. Again thanks for all assistance.

Phil

By charliemccraney - 13 Years Ago
Oooohhhh, Holley 2100. Apparently we were thinking Autolite 2100.