[AC Ventura]

Hi guys,

My aluminium FE arrived in a crate. The carb had no instructions and I’m not familiar with the QFT. I’m told it’s a 780, but not sure how to verify that as there’s no markings I can see.

Anyhow to the point. The carb has two small ports (arrowed) and I’m not clear what these are supposed to be used for. When I installed it, I though best to cap them of with a couple of neoprene caps, I had lying around. Now I’m wondering if this was a mistake and is affecting the carb operation, in particular the vac secondaries.

Any input I’d be very grateful as I’m not getting the power (503/532) I was told the engine produced in the dyno. Also there’s an unpleasant crackle in the exhaust note, that I’m guessing is unburnt fuel.

Do get me wrong. Car has big cam idle and runs smoothly after 2000 rpm. Just feels more like 250 bhp. I’m sure the exhaust note is linked to the missing power. It’s really odd and I don’t feel I was misled by the builder.

Only other clue is the MSD 6 AL2 we couldn’t get the 1st stage to work. I was going to use it as a 4000 rpm limiter, for if I gave the car to my kids to try. In the end we set both at 6000 limit.

Thanks
Mike