Turbochargers?

**pete376403** · 20th November 2006, 22:48

Go to a tech bookshop or look on amazon for a book "Turbochargers by Hugh MacInness" It's an oldie so doesn't include modern developments such as ball bearing t/c but has huge amounts of detail about the calculations for matching and sizing (MacInness was a founder of Rajay)

**EZAS** · 21st November 2006, 11:22

ok, Exhaust spins around the Turbo, spins up a wheel/fan that forces air down into the induction which is then controlled by the throttle bodies.

With a carby, does the turbo just slam air straight into the carby? I can't find any pics eh? ... can someone show me a pick of a turbo carby.

**scumdog** · 21st November 2006, 15:42

Originally Posted by EZAS

ok, Exhaust spins around the Turbo, spins up a wheel/fan that forces air down into the induction which is then controlled by the throttle bodies.

With a carby, does the turbo just slam air straight into the carby? I can't find any pics eh? ... can someone show me a pick of a turbo carby.

As I said before: MOST of the time the carb is on the intake side of the turbo, the air/fuel mix is sicked in by the turbo and forced into the intake side of the engine.
There is the odd set-up where the carb is on the pressure side as you mentioned above but there are more complications with pressurising a carb than you realise.

**imdying** · 21st November 2006, 17:33

http://www.google.co.nz/search?hl=en...e+Search&meta=

**EZAS** · 21st November 2006, 18:14

Originally Posted by imdying

http://www.google.co.nz/search?hl=en...e+Search&meta=

Now that's what I needed ... a good 6-7 hours of reading/learning.

Perhaps I'll switch to an Efi system first. How hard is it to migrate from a carby setup to efi'd setup? I just need a parts list

**imdying** · 21st November 2006, 18:22

Originally Posted by EZAS

Now that's what I needed ... a good 6-7 hours of reading/learning.

Perhaps I'll switch to an Efi system first. How hard is it to migrate from a carby setup to efi'd setup? I just need a parts list

What sort of motor/bike is it?

**EZAS** · 21st November 2006, 20:00

My/bike '95 ZX9
I have a mate who's gonna be spending about $12,000 on a new bike, but I'd rather spend a few thousand and go with a forced induction system.
In saying that I'm not really wanting huge boost maybe 2-4psi.

If I can turbo this bike, there's nothing to stop me from turboing something else. I've been working 10-12 hour days to get the $$ I don't get my liscence back for awhile so I'd prefer to have the bikes in pieces than have it sitting there begging me to be started.

**imdying** · 21st November 2006, 20:13

Considering that you'll probably drop a few thousand without any trouble whatsoever, and given the advances in chassis technology, the amount of weight (comparitively) the 9R carries, the reduction in reliability, etc etc (you get the idea), you would be better of buying a ZX10R. Except at the drag strip, the ZX10R would thoroughly dominate a boosted 9R. Of course, once you've done the ZX10R thing, then you can boost that... and that merely requires dropping some coin and fitting it, it just comes as a kit. If you search the recent posts here, you'll find a thread on ZX10R supercharger kit too.

I really really like to build things... just because I can... I enjoy getting my hands dirty. But don't sink your money into that when a ZX10R would be a far better bike in every respect but quarter mile times. Hell, if you brought a new one, it would come with a warranty!

**mops** · 5th December 2006, 15:10

i'd definitely go EFI. there are many cheap options available... link, megasquirt, microsquirt (released recently) and of course VEMS to name few 'cost effective ones'

turbo wise... well there are few different possibilities there....
either very small turbo for low lag, quick response and good midrange or huge turbo, so it spools only at high loads/max throttle.... in such setup you could even run no wastegate at all

supercharger is always a good idea...

hard to say, but i know stuff about EFI so any questions ask...

**EZAS** · 6th December 2006, 17:16

I picked up a T04B for my old RX-7 for $800 then had it milled out to fit a T-66. I managed to squeeze out 374hp out of it and it ran well for about 20,000k's before I sold it.

The standard RX-7 Turbo's are cheap anyways http://www.trademe.co.nz/Trade-Me-Mo...n-79714419.htm
They are basically just T-03's, however I'd expect to be able to pick up "the right" turbo for less than $1,000 (a T-70 is only $850)

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