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Discussion Starter #1
Hello,

I'm interested in turbocharging my cbr1100xx carb engine

The engine is in a kit car running as RWD using a shortened sump with modified oil pick up. (Sump must be 2"s tall)

Now my question Is!
As the oil drain from the turbo has to be higher then the oil level where can I drain to on the block?

Turbo will be mounted higher then the top of the engine
 

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Just checking that you are running a dry sump system on the motor (or at least an accusump) otherwise you will run into problems with No 3 rod.

BTW I would avoid using the stator cover (assuming you are running a stator in there) since this already gets very hot and pumping more hot oil in there is asking for problems. Have you thought of running a different oil supply to the turbo? Just thinking that would be the way to get the correct oil pressure and ensure that the oil is properly cooled. FWIW I use a separate supply and cooler on my supercharged bike.
 

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Discussion Starter #5
I don't know much history of the engine im afraid.

It's a carb engine which was fitted to another kit car and was removed to fit a car engine

I bought it from eBay and the seller told me that the sump has been modified and that I have to run an oil cooler to make up for the reduction in amount of oil in the engine now due to the sump being shortened

Sump is now 1-2 inches overall depth and doesn't have an accusump fitted
 

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Sump is now 1-2 inches overall depth and doesn't have an accusump fitted
You really need to sort this out first (dry sumping is my favorite) otherwise this is the result of hard cornering with a shortened sump (the owner forgot to turn the accusump on!).
Blown motor comp 001.JPG
 

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Discussion Starter #7
Ok great I will look into the accumsump now I assume you run the accumsump with my current shortened sump will be ok?

Any other ideas on the turbo oil drain
 

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See the pic of the blown engine?
It's been years since I had my turbo BB but notice that chrome pipe in the lower left corner of the pic?
IIRC, that allows oil to drain into the oil pan.
Could you not simply T into that or is it gone with your setup?
I drained the turbo into the main drain plug which was modified with a hose barb.
I also used a restrictor at the feed side into the turbo, about .060" IIRC.
Been a long time, sorry....
 

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Ok great I will look into the accumsump now I assume you run the accumsump with my current shortened sump will be ok?
yes should be, the blown motor I showed above had a very shallow sump on it and it ran just fine until the owner forgot to turn the accusump on. The motor lasted half a lap of Castle Combe before the rod made a bid for freedom.

As a secondary note do you know if the balancer shafts are still in place? Some of the 'bike engined car' brigade remove them and then don't blank the appropriate oilway, this can also lead to problems. If they are left in there is no issue.
If you don't know pop up a couple of photos of your motor and somebody should be able to tell you if they are present (I'm off ridingfor a couple of weeks in a couple of hours so won't be able to answer)
 
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