Turbo carb question...

[vespatim]

I am actually not working on a bike, but rather a small car engine. I am turbocharging a MGB with a 1.8L engine, but hear me out for a minute. I had planned to use a Weber DCOE carburetor, but they have become very hard to find so I am looking for something else that will work. Mikuni carbs came to mind. There are few new carbs being made these days for cars, but these motorcycle carbs are modern and beautiful. There are no throttle shafts in the slide design, so that is one less thing that can leak boost. What do you guys think? I know Mr. Turbo uses the Mikuni HSR in those turbo kits. Is that the best Mikuni for turbocharging? I think even one HSR 48 would flow enough for this engine. Or maybe two HSR 42s. What other carbs might work for me? Has anyone had experience with turbocharging Mikunis? Any information would be greatly appriceated.

Thanks,
Tim

[mydlyfkryzis]

Slides may have a harder time controlling than butterfly type throttles. The pressure against them is higher on a Turbo than NA, and the slides always had some stiction issues with NA engines.

Instead of blowing theough the carbs, why don't you draw through them? It is easier technically because of venting issues and such. If you insist on a blow through design, you might want to consider building a pressure housing for the carbs. This way you don't blow fuel out the bowl vent.

[jmillheiser]

If you go draw through plan on a carbon seal for the turbo.

I was thinking of going the draw through route for my VW but decided to go with FI instead.