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Re: [turbobike] RB Racing CBX Twin Turbo Kit

Fri, 24 Sep 1999 08:02:23 -0400

Hi Bob,

I believe the most common place you'll find 10mm banjo bolts is either on
motorcycle brake systems or on EFI fuel rails.  Those might be your best

Do you know how well the SU worked in its day?  I'm sure there are some articles
in the old Turbo Bike magazine but I can't remember off hand how well that carb
worked.  Many people have been pleased (including myself) with the Mikuni HSR42
roller slide carb, and they also make a 45 as well.  I think your SU is a CV
type carb with a butterfly, right?  What I'm getting at is that it won't flow as
much as one might think despite its large size.  The smaller Mikuni should be
able to support what you're doing.  It's something to consider before you spend
time and/or money with the SU.  The Mikuni is only a $300 piece.  I can offer
jetting suggestions for it if it would help.

By the way, RB now has a website at rbracing-rsr.com

Bob Shammas

"Bob Buehler" <ribicf@hotbot.com> on 09/24/99 12:00:48 AM

To:   turbobike@natvideo.com
cc:    (bcc: Bob Shammas/EQA/Nsk-Corp)
Fax to:
Subject:  [turbobike] RB Racing CBX Twin Turbo Kit

Hi Gang:

Just purchased an older turbo kit that was put together by RB Racing back in

I'm looking for parts and advice.

The kit came with an SU 2 inch or 57mm carb.  I figured I would try this unit
out first since I have it but I need some parts.

The carb needs a plate with a 2 inch pipe extending from it to attach it to the
primary intake manifold.  The system is designed to have the carb feed air and
fuel into a "t" type manifold that connects to the pair of IHI turbos.  The
turbos feed or force air and fuel into a manifold attached to the head.

I also need to find a way to attach a throtle cable and choke cable to the carb.
If anyone has been through this or has an old setup that they have since replace
I would like to speak with them, see the system or purchase some of the parts.

I would also like to know if anyone has a source for 10 mm by 1.5 thread bango
bolts.  As it turns out the IHI turbos have this odd thread bango fitting for
the high pressure oil inlet.

If anyone out there has some general advice or information that they would care
to share with me I would greatly appreciate it, this is new stuff to me.

Thanks in advance
Bob Buehler

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