RHB5

My concern is exactly that, sucking oil past the seals when manifold vacuum is present- basicaly the turbo compressor will become part of the manifold. I have debated the throttle body after the turbo and carb to control airflow. I can pick up a thottle body for cheap off of ebay. Here is the other thing for those of you talking about FI. I am cheap, that is why I am still doing a carb setup. The used RHB5 cost me $36. I have a bypass valve I paid $20 for shipped(yeah it looks good and works). I found a full turbo rebuild kit for 60 bucks ($120 from turbo city) from eBay. I will make my own manifolds- mainly because nobody else does. Thanks for the suggestions. --Robert

Thats to do it properly. I could be done for less but with less success. The problem with the MG is its siamesed intake ports. With a firing order of 1,3,4,2 and cylinders 1&2 sharing a port along with 3&4. What you get is a period of overlap where cylinders 1 and 2 are drawing air at the same time, this causes extra fuel to be required during this period of overlap, so a batch fire or throttle body will not work. You WILL get a lean condition on cyls 2 and 4 and rich condition on 1 and 3. I saw a guy who built a custom tuned port intake manifold and had exactly that problem- power was gone by 3000 rpms. For proper FI on these engine you have to change over to a crossflow head which alone costs over $2k. Then you need manifolds, wiring, rocker assembly, computer, etc. There are no factory FI, turbo, or supercharger parts. MG never made that an option. The company produced cars from about 1926ish to 1980 when the origional MG company went out of business and never fuel injected a car. It's British, they are not known for great innovations in street cars.

Thanks Nug, thats the answer I was looking for.

Will the RHB5 work in a draw though application?

To properly FI this car will cost nearly $4K. It would require changing the head, rocker assembly, fabricating an intake manifold, wiring harness, stand alone management system, fuel return lines, gas tank modification, and gobs of patience- FI was not an option in 1969. The engine is a 1798cc pushrod L4 cylinder(94hp,110lbs torque), if not the RHB5, what would you suggest for a quick spooling turbo- T28? I purchased the IHI from ebay for $36 shipped- all it needed was to be rebuilt, good housings, impellers, and waste gate. I would like to use the IHI as I already have the parts I need to set it up. Will the RHB5 work in a drawthrough application? Thanks

I have an IHI RHB5 out of what I think is a late 80's Loyale. The turbo spec # is VF48710. I would like to use this turbo in a custom application doing a drawthough on a carburetor(MGB with a single 1 3/4" SU). I have read that in order to use a turbo in a drawthrough setup that the turbo must have carbon seals in order to keep the oil from being sucked out of the turbo. Can anybody advise me on this matter? Are carbon seals even avaliable for this turbocharger? Thanks, Robert