Rickricca Posted June 13, 2018 Report Share Posted June 13, 2018 Have been having an issue with fuel boiling in the carburetor with heat soak after shut down. 1940 Chrysler Windsor. I removed lower pans from either side of the motor to improve air flow, and installed a heat shield between manifolds and carburetor. So far, so good Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted June 13, 2018 Report Share Posted June 13, 2018 Have you lowered the float level in the carburetor? Quote Link to comment Share on other sites More sharing options...
Rickricca Posted June 14, 2018 Author Report Share Posted June 14, 2018 float level is at spec Quote Link to comment Share on other sites More sharing options...
_shel_ny Posted June 14, 2018 Report Share Posted June 14, 2018 Lower it. That spec is for 1940 fuel formulation. Quote Link to comment Share on other sites More sharing options...
jeffsunzeri Posted June 14, 2018 Report Share Posted June 14, 2018 19 hours ago, _shel_ny said: Lower it. That spec is for 1940 fuel formulation. What specification has changed to require a lower volume of fuel in the float bowl? Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted June 14, 2018 Report Share Posted June 14, 2018 26 minutes ago, jeffsunzeri said: What specification has changed to require a lower volume of fuel in the float bowl? the entire makeup and formulation of gasoline along with the cutting with varying amounts of alcohol.....some very interesting reading on the internet explaining this and the winter/summer blends we go through annually....... Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted June 14, 2018 Report Share Posted June 14, 2018 31 minutes ago, jeffsunzeri said: What specification has changed to require a lower volume of fuel in the float bowl? Corn oil. Table 2.1: Gasoline and Ethanol Gasoline Ethanol Flash Point -45°F 55°F Ignition Temperature 530–853°F 793°F Specific Gravity 0.72–0.76 0.79 Vapor Density 3–4 1.49 Vapor Pressure 38–300 mmHg 44 mmHg Boiling Point 100–400°F 173°F Flammable Range (LEL–UEL) 1.4%–7.6% 3.3%–19% Conductivity None Yes Smoke Character Black Slight to none Toxicity Lower than gasoline Solubility None Highly Reference: The National Institute for Occupational Safety and Health (NIOSH) Pocket Guide to Chemical Hazards Quote Link to comment Share on other sites More sharing options...
greg g Posted June 15, 2018 Report Share Posted June 15, 2018 Simply put 50's gas went bang in an internal combustion cylinder, today's goes whoomph. It evaporates more quickly, absorbs more heat quicker, boils at a lower temp, produces fewer BTUs. Has a slower flame front, And changes formulas twice a year at least in the northern part of the country. Quote Link to comment Share on other sites More sharing options...
Rickricca Posted June 15, 2018 Author Report Share Posted June 15, 2018 Since I installed the heat shield and improved cooling air flow, I am no longer having the issue. Thanks for all the info 1 Quote Link to comment Share on other sites More sharing options...
Rickricca Posted June 23, 2018 Author Report Share Posted June 23, 2018 Also cured the sticky centrifical advance, replaced the vacuum advance and set initial timing at 4btc (was 0). Sometimes I forget the basics! Runs cooler, more power and no boiling fuel 3 Quote Link to comment Share on other sites More sharing options...
1941coupe Posted December 14, 2018 Report Share Posted December 14, 2018 And be sure to check your heat riser for proper operation. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.