04-03-2020, 09:07 AM
Hi Bob
This thread interests me as I’m just fitting a 1 1/4 SU to the special. I think the HS2 is the standard Carb of the mini era with a flexible pipe between the float chamber and the main body of the carb. I think the H type with the hole through the float was used from the late 30’s on.
I can’t see how the float lever orientation would affect the running of the carb but it does sound like fuel starvation is the problem. One thought is that the angle of the carb is set incorrectly on the manifold. From Burlen’s catalogue there is a myriad of float connecting pieces for every conceivable float chamber angle. The float chamber must be level in all directions.
Hi Tony, I’ve heard the same regarding the 1 1/4 but also reports of them working well. I guess it depends on the state of tune of the engine? I’m hoping that a sports inlet manifold, Ricardo head and bunch of bananas exhaust will provide suitable breathing requirements for the 1 1/4 H type I’m fitting? I’d be very interested in comments from those running the larger SU!
Cheers
Howard
This thread interests me as I’m just fitting a 1 1/4 SU to the special. I think the HS2 is the standard Carb of the mini era with a flexible pipe between the float chamber and the main body of the carb. I think the H type with the hole through the float was used from the late 30’s on.
I can’t see how the float lever orientation would affect the running of the carb but it does sound like fuel starvation is the problem. One thought is that the angle of the carb is set incorrectly on the manifold. From Burlen’s catalogue there is a myriad of float connecting pieces for every conceivable float chamber angle. The float chamber must be level in all directions.
Hi Tony, I’ve heard the same regarding the 1 1/4 but also reports of them working well. I guess it depends on the state of tune of the engine? I’m hoping that a sports inlet manifold, Ricardo head and bunch of bananas exhaust will provide suitable breathing requirements for the 1 1/4 H type I’m fitting? I’d be very interested in comments from those running the larger SU!
Cheers
Howard