Courtesy of Herman Wedemire - AUGUST 2023
As I continue to make improvements to my Model A, I tested three rebuilt carburetors.
Three carburetors tested:
Marvel Schebler also called Wheeler-Schebler
Each carburetor was carefully rebuilt adjusted on my car.
First place - Marvel Second place Tillison Third -Zenith
Performance improvement with the Marvel was observed immediately. Car was very responsive accelerating. Idle was super smooth. Down shifting gears also appeared to improve due to rpm falls of quickly with foot off the gas pedal.
Tillison comes in a close second. Smooth idle and good acceleration but noticebly not as peppy as th Marvel.
To give Zenith benifit of the doubt, I tested 3 different Zenith carbs. Each one performed differently but none matched with the performance of the Tillison and Marvel.