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CC Advertisers
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 16Likes
06-04-2024, 10:26 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Next time you park it hot... give it 15 minutes with the hood down and then take the air cleaner off and look at the top of the butterflies for puddled gas. Watch for drips of gas from the boosters. look for suspicious wet spots or brown stains on the outside of the carb at the downside (meaning the direction that a drip would go if it was running off your butterflies) especially on the butterfly shaft. Any of those will tip you that you have a percolation problem. If you see none of that, with your hand on the carb linkage give it a good "push to the floor" and watch for accelerator pump to see if it will squirt gas out in two nice strong streams. Those two tests will put you down the road to success. Personally, I'm betting on percolation.  |
06-04-2024, 12:45 PM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Chilliwack,BC,
BC
Cobra Make, Engine: F5 Roadster
Posts: 1,422
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Not Ranked
1/4" heat gasket
__________________
F5 cobra Mark 4 roadster, **SOLD** Ruby Wine Red with pearl,
dual 2" roll bars, warmed up 302, Edelbrock AVS carb and heads, E Street aluminum Heads, Comp cam and roller rockers, AOD, 4.10 Eaton Posi, Power Baer/disc brakes, block hugger headers, 2 1/2" under car exhaust, F500 18" black spoke wheels.
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06-05-2024, 02:55 PM
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CC Member/Contributor
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Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, ERA 289 roadster hybrid, mystery Ford powered 2dr convertible
Posts: 12,767
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Not Ranked
Quote:
Originally Posted by HighPlainsDrifter
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For all of my race cars, I prefer the Mr Gasket kit, part # 3710 , as it gives more options. You only need one heat shield, and two gaskets, and do not have to use the whole kit.
Dozens upon dozens of cars I've dealt with, and this fixes any carb percolation issues I've run across.
Bill S.
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
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06-05-2024, 07:33 PM
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CC Member
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Join Date: Sep 2007
Location: Marlboro,
NJ
Cobra Make, Engine: Contemporary Cobra
Posts: 924
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Not Ranked
fuel pump
do you have a electric fuel pump? You can put one in line with a check valve Turn it on to fill the bowls before starting … solved it for me
jom
__________________
The Impossible Only Takes A Little Longer
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06-06-2024, 12:19 PM
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CC Member
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Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,916
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Not Ranked
Quote:
Originally Posted by saltshaker
do you have a electric fuel pump? You can put one in line with a check valve Turn it on to fill the bowls before starting … solved it for me
jom
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What saltshaker wrote.
__________________
Brian
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06-06-2024, 06:53 PM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine: # 757 ERA 427 SC , 482 Al. big block
Posts: 896
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Not Ranked
Here are two other suggestions that would probably work well if it is heat soak . I run a wood insulator under the carb that is readily available from Summit in various thicknesses . Seems to work better on my FE that the shield for some reason .
Another area that is generally overlooked is the fuel pump . It`s sitting right against the hot engine block and is lubricated by hot engine oil . I found a company …… Seals - It , who makes a fuel pump heat insulator gasket set that they came up with for Robert Yates Racing for their Windsor engines .
It consists of a special insulator gasket , insulated bolts and a hot oil shield that keeps the hot engine oil out of the pump . Since the fuel pump is lubricated with splash engine oil , it obviously needs some lube from somewhere . So , they installed a grease fitting in the pump body and pack it with grease .
I put that setup on my FE minus the seal gasket . Even though it`s an FE , the gasket fit fine with no leaks and only moved the pump out about 3/16” . No problems with overstroking the pump with that small a change ( I installed it , turned it over some , pulled the pump off and checked the ride pattern on the pump actuator arm ) . This kit is also available from Summit for around $50 to 60 US dollars .
Just a thought . |
06-07-2024, 03:39 AM
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CC Member
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Join Date: Jul 2021
Location: Northampton,
UK
Cobra Make, Engine: Shell Valley Daytona, Ford 302
Posts: 140
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Not Ranked
Quote:
Originally Posted by saltshaker
do you have a electric fuel pump? You can put one in line with a check valve Turn it on to fill the bowls before starting … solved it for me
jom
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No I don’t. It’s mechanical. |
06-07-2024, 03:32 AM
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CC Member
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Join Date: Jul 2021
Location: Northampton,
UK
Cobra Make, Engine: Shell Valley Daytona, Ford 302
Posts: 140
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Not Ranked
Quote:
Originally Posted by HighPlainsDrifter
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I think phenolic spacers do work but unfortunately there is very little space between the air cleaner and bonnet to increase the height of the carb. |
06-04-2024, 12:46 PM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Chilliwack,BC,
BC
Cobra Make, Engine: F5 Roadster
Posts: 1,422
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Not Ranked
1/4" heat gasket
__________________
F5 cobra Mark 4 roadster, **SOLD** Ruby Wine Red with pearl,
dual 2" roll bars, warmed up 302, Edelbrock AVS carb and heads, E Street aluminum Heads, Comp cam and roller rockers, AOD, 4.10 Eaton Posi, Power Baer/disc brakes, block hugger headers, 2 1/2" under car exhaust, F500 18" black spoke wheels.
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06-07-2024, 03:13 AM
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CC Member
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Join Date: Jul 2021
Location: Northampton,
UK
Cobra Make, Engine: Shell Valley Daytona, Ford 302
Posts: 140
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Not Ranked
Quote:
Originally Posted by patrickt
Next time you park it hot... give it 15 minutes with the hood down and then take the air cleaner off and look at the top of the butterflies for puddled gas. Watch for drips of gas from the boosters. look for suspicious wet spots or brown stains on the outside of the carb at the downside (meaning the direction that a drip would go if it was running off your butterflies) especially on the butterfly shaft. Any of those will tip you that you have a percolation problem. If you see none of that, with your hand on the carb linkage give it a good "push to the floor" and watch for accelerator pump to see if it will squirt gas out in two nice strong streams. Those two tests will put you down the road to success. Personally, I'm betting on percolation. |
Thanks Patrick I will follow your tips next time I have it out. I should have added that once started it runs fine. |
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