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EFV-8 Club Forum / General Ford Discussion / power deficiency?

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Discussion Topic: power deficiency? -- page: 1 2

37RAGTOPMAN

04-04-2023 @ 7:19 AM

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What you need to do if there is a problem., and exactly what it is... before starting to replace parts that are not needed
STEP ONE,,,,
I would first take a compression test. to see if al 8 cylinders are up to par,
if comprssion is off nothing you do will help,
do a dry compressiong test FIRST then do a wet compression test to see if it increases compression,
this will test if the valves or rings are at fault
you can also do a VACUUM GAUGE TEST. to SEE WHAT READING'S you get, most vacuum gauges explain what the reading are

and check for full throttle at the carb with someone pushing the gas pedal to the floor, to see if linkage is adjusted
I have a 37 85 hp and it runs with plenty of power , even up hills most in 3 gear with no problems
if compression is OK and carb has full throttle

Also check your fuel supply, fuel pump press and it if is pumping correctly enough of fuel and if it is old and maybe dirty
usr fresh fuel to all tests
you can disconnect the fuel line front and rear and blow out the front to rear line, be carefull
see if any dirt is in the fuel system
hope you read this post, hope it helps 37RAGTOPMAN /Maine

CaliforniaBorn36

04-03-2023 @ 4:29 PM

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When going uphill, pull the choke out ever so slightly and see if that helps. Mine used to struggle a bit under load, pulling the choke a bit helped by giving a little richer mix for the carb.

carcrazy

04-03-2023 @ 11:59 AM

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If you want to install an electrical tachometer for an 8 cylinder engine with 6V positive ground system, one source for them is Westach. Their website is:
https://www.westach.com/tachometers

pauls39coupe

04-02-2023 @ 4:59 PM

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These are not the most powerful cars in the world especially compared to a modern car. That said, how steep and how long are the hills you are trying to climb?
Pull the spark plug wires off one at a time, and hold them to the head. You should see a bright blue spark about a quarter of an inch long. The engine should drop 50 to 100 rpm when you ground the plug to the head. If you have a good spark and no rpm drop there are problems with that cylinder.
Changing to a new set of name brand spark plugs would be a good start.
I would bet a good tune up would help a lot. New plugs, points, condenser, rebuilt coil, new plug wires, carb rebuild, may be needed

CharlieStephens

04-02-2023 @ 12:09 PM

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Check to be sure you are getting full travel on the throttle, sometimes the linkages get bent.

Charlie Stephens

ermine white

04-02-2023 @ 11:57 AM

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Thanks for the advice,I will do so.

JayChicago

04-02-2023 @ 11:45 AM

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I'm thinking that this low power issue could be due to so many different things, that we on this forum can't really give any meaningful advice. My only advice is to join your local Regional Group, have someone with experience drive with you on those hills.

ermine white

04-02-2023 @ 8:01 AM

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thanks for your input, yes, all of your assumptions are correct,the information you provided has been very useful,thanks again.

carcrazy

04-01-2023 @ 8:00 PM

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Making the following assumptions: your tires are the stock 6.00X16 size with an aspect ratio of 90%, your rear axle ratio is the stock 4.11:1, your 2nd gear ratio is 1.60:1 and you don't want to rev your engine over 3800 RPM (the power peak), 2nd gear is safe for 46 MPH. If you have the stock 2.82:1 1st gear ratio, 3,800 RPM engine speed in 1st yields 26 MPH. Your top speed in 3rd gear at 3,800 RPM, providing your engine has enough power will be approximately 74 MPH.

ermine white

04-01-2023 @ 4:05 PM

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ok thanks, with no tach not sure how to gauge how high to rev it without blowing it up!

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