View Full Version : TVR 2500M Triple Weber 40 DCOEs

08-11-2011, 12:29 PM
I have a question for the TVR/Triumph guys out there. I own a 1974 TVR 2500m and it has three weber 40 DCOE carburetors on it. These carbs look great, but the problem is that there is a stumble in the acceleration of the car. I have to take off very slow until the RPMs are higher in range. It is sort of manageable if I toggle the choke while driving...It definatly feels like a lean out situation (not enough gas or too much air). The problem never really goes away though.

I have made sure that all of the jets in the carbs are clean and I recently put a fuel regulator on the car which helped a little.

Has anyone else experienced this problem? I need help with this aggrevating problem, I can't find the solution!

Any help or suggestions would be great!

Thank You in Advance,


08-11-2011, 03:16 PM
Can't answer your question, but am envious of the triple webers!!
Two years ago, attended Jonh Twist's MGengineering 3 day seminar and spent some time w/ Carl Heideman @ Eclectic Motor works. They've done several triple carb convesions and I'm sure they can help w/ your problem. I'd recommend you email Eclectic Motor Works. They are really good people.

08-13-2011, 01:52 PM
Thank You, I will shoot them an email to see what they have to say!


08-15-2011, 10:04 PM
They'll ask what comes after the "40 DCOE" first, then you will learn about "progression ports" under the brass caps just outboard of the idle screws.