cbr 1000 carb turbo mod

[oadamo]

hi all iam turboing a cbr 1000 engine i no i need to boost the carbs aswell. but what do i need to do to them to take boost.
thanks adam

[Timmeh]

If you need to ask this kind of question maybe you shouldn't be doing it.
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[Robby]

Eesh. Big job.

Simple turboing - The carbs need to be well sealed to stop the boost pushing out the side of the carbs. You also need to pressurise the fuel going into the carbs at the same pressure as the air going into them.
Then you get fun with getting it set up right, but thats a whole new world of pain.

Personally, I would have a bit more difficult up front to make it easier to make it run well, and more open to changes down the line. I'd convert it to fuel injection.
The existing carbs could be converted to throttle bodies, fuel injectors are cheap, and the right fuel pump will be cheap from a car breakers. Fitting it to the tank would be less easy, but possible. Lambda sensor would be necessary, but seeing as you need to make a whole new exhaust system to take the turbo, its only a small part of a big job.
ECU, you can megasquirt it. Expect to spend the bulk of the time getting the fuelling sorted, and dyno time will be necessary.

Big job. What turbo are you using, and are the manifolds off the shelf or home made? Also is it going in a bike or a car?

[Kickstart]

Hi

Simple way to do it is to put the entire carbs inside the plenum chamber, although that leads to other problems (loads of heat, and try balancing carbs that you cannot get at properly with a running engine).

Basically you need the carbs to be sealed, with the float bowls, etc, vented to the plenum chamber. And you need a fuel pump to keep the fuel pressure above intake pressure.

All the best

Keith
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