Products to Compare (max of 3)
X
Compare These Parts
Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Customer Service
Since 1952
in
in
  • Expert Tech Support
  • Huge Inventory
  • Fast Shipping

The Flathead Vapor Lock

By John
1 year 7 months 26 days ago

In this Tech Tip, John makes a few suggestions on how to deal with the classic problem of a Flathead Ford, vapor-lock.

Flathead Ford won't run when it's warm

“Hi, I own a ‘51 Ford convertible that I cannot get to run in warm weather. The fuel system shuts down what is your fix for this problem? Fuel pump? Carb? Frustrated owner here, thanks for any help.”

  • Jim

Hi Jim, Your question brings up the age old problem of keeping the Flathead Fords running in warm weather. The Flatheads were notorious for vapor-locking. Unfortunately, the warmer it gets the worse it gets. The old trick of clothes pins on the fuel line and aluminum foil over the line always doesn’t help. Vapor lock and boiling fuel is normally the culprit. First you need to check fuel flow to make sure everything is flowing freely in the fuel lines. If not, make the changes to correct those problems. If you have 6 volt pump you can look at P/N 9104259, or a newer mechanical pump will insure flow. Keep in mind the ‘51 mechanical pump has two possibilities for the pump fittings. A regulator such as 56058500 is always recommended with electric pumps. If your mechanical pump appears to be working, maybe a helper pump is needed. In that case we offer P/N 465810400 in 12 volt and this requires no regulator. Carb spacers help such as P/N 91011615 and sometimes customers will use 2 per carb. Thermal sleeve is available under P/N 70414030 and others. Relocating the fuel line so not to be close to the exhaust is another good idea.  Run regular gas without ethanol and avoid the blended fuels. Feel free to visit us on the web at www.speedwaymotors.com or call 1-800-979-0122 with questions or to place an order.

  • John W.

Products Featured in this Article

Related Articles

'57 Bel Air Fuel Pump
by Jeff K. - Posted in Tech
3 months 8 days ago
The process of changing out a mechanical fuel pump in a 1957 Bel Air and some helpful tips while doing so.
Learn More
Winterizing Your Fuel System
by Frank G. - Posted in Tech
3 months 21 days ago
The process on how to effectively winterize your fuel system in open wheel racing. This includes step by step instructions and recommended parts to use for your fuel system.
Learn More
Fuel System Overview
by Speedway Tech Team - Posted in Tech
1 year 8 months 10 days ago
Thinking about rebuilding your fuel system but you're not sure what it entails? Click here for a comprehensive article on what to expect!
Learn More
Is a washable filter worth it?
by Speedway Tech Team - Posted in Tech
1 year 8 months 10 days ago
Unsure if your washable filter is worth the cost? Click here to find out!
Learn More
Designing Your Fuel System
by Jason - Posted in Tech
1 year 8 months 10 days ago
Fuel System Performance
Learn More
Red Ram Revival Part Two
by Tim - Posted in Tech
1 year 10 months 13 days ago
Speedway Motors employee Tim M. Decided to take us along as he revives his 241 "Baby Hemi". In this installment, Tim helps his project breathe a bit better with and Edmunds 2x2 intake, topped with a pair of Speedway Motors' own "9 Super 7" carbs.
Learn More
Fuel Expansion Issues
by John - Posted in Tech Tips
1 year 7 months 16 days ago
In this Tech Tip, John offers up a couple solutions to a somewhat common problem of fuel expansion on the older vehicles.
Learn More
How To Set Up Multiple Carburetors on a Vintage Engine
by Jason - Posted in Tech
1 year 7 months 10 days ago
There's a right and wrong way to run a two-barrel carburetor on your vintage engine. Check out this guide about how to select the correct carburetor for your Flathead or vintage engine.
Learn More
Keep Your Sprint Car Engine Running at Peak Performance
by Dalton J. - Posted in Tech
2 months 3 days ago
One of the most important parts of your racing operation is the engine. This article gives a detailed overview on how to maintain your engine to get the most out of it for as long as possible. Also learn some tips to prolong the life of your engine.
Learn More
Plumbing Your Dual Feed Holley Caburetor
by Zach R. - Posted in Tech
6 months 7 days ago
Learn how-to plumb your dual feed Holley Carburetor.
Learn More
Suggestions
Error
Note
Ok