draggsxr1000
Expert Class
Posts: 190
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posted March 18, 2005 03:49 PM
home made turbo
My teammates and I was wondering if a home made turbo kit would work on my gsxr 1000. We have several small turbos that are internaly wastegated at 7psi at our machine shop. My guestion is can ya just put one on the exhaust make an air box. And blow threw the throttle bodies. IF so can it be tuned by a power commander alone. And what kinda power or problems will i face. I heard somthing about boost creep. I have a dyno i can use to tune this jewel. Its a race only bike. Sees very lil street.
  
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johnnycheese
Pro
Posts: 1008
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posted March 18, 2005 04:02 PM
you need an external wastegate that internal for racing will creep bad
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Builder and tuner of some of the fastest N.A. and P/A Hayabusas and ZX12 /14 in Texas
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draggsxr1000
Expert Class
Posts: 190
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posted March 18, 2005 10:10 PM
what exactly is cree there johnny
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johnnycheese
Pro
Posts: 1008
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posted March 19, 2005 01:05 AM
you don't know about creep?
you need to do some homework brfore you takle this mod
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Builder and tuner of some of the fastest N.A. and P/A Hayabusas and ZX12 /14 in Texas
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canadamaxxer
Pro
Posts: 1090
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posted March 19, 2005 08:03 AM
quote:
you don't know about creep?
you need to do some homework brfore you takle this mod
Well put!! 
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canadamaxxer
Pro
Posts: 1090
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posted March 19, 2005 08:07 AM
 Edited By: canadamaxxer on 19 Mar 2005 08:09
invest in the book "Motorcycle turbocharging, supercharging and nitrous oxide". There is also a book I don't have, but is apparently very good also....called "Maximum Boost" ...written by Corky Bell.
These books will address the most common terminologies and concepts you will need to know to build this kit.
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Lorcan
Expert Class
Posts: 327
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posted March 19, 2005 11:10 AM
Edited By: Lorcan on 19 Mar 2005 11:16
Yes you can do exactly what you propose, up to the limit of the injectors. Boost creep is caused by the wastegate hole being too small, this will depend on which turbo you select. If the hole is too small not enough exhaust gas bypasses the turbine and boost continues to climb above where you want it to be. An external wastegate, while desirable in high boost situations where the exhaust pressure can push open the flapper valve and make it leak, probably won't be needed IMO if you are sticking to 7psi (~200hp on a GSXR1000), unless you choose a very small turbo. I have used an internally wastegated T25 on a 750 without boost creep at up to 23psi. If you think I'm wrong, consider that Kawasaki sold over 5000 750 turbos that ran 10psi as stock and were internally wastegated without problems. One of the guys on my site has run 9.4 on his 750 turbo with the stock internal wastegate.
Take the book suggested above, and throw it in the trash. Then buy and read "Turbochargers" by Hugh McInnes. It's way better and McInnes actually knows what he's talking about from direct experience rather than relying on information from other people.
Build your aluminium plenum and fit a boost sensor. Run the grey wire on the Powercommander to it. You can then map according to boost, not throttle position. If you need to, you can fit larger injectors and fuel pump. If your bike has two sets of butterflies you will need to remove the 2nd set.
I say go for it. You will have fun and learn a lot. If you get stuck there are plenty of other home builders around that will help you out here and at other boards like Gary Evan's board http://p090.ezboard.com/bazbiketech. Good luck.
____________
810cc - 211mph: www.750turbo.com
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draggsxr1000
Expert Class
Posts: 190
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posted March 19, 2005 10:20 PM
Yes now thats what im talking about thanks lorcan
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canadamaxxer
Pro
Posts: 1090
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posted March 20, 2005 11:38 AM
quote:
Yes you can do exactly what you propose, up to the limit of the injectors. Boost creep is caused by the wastegate hole being too small, this will depend on which turbo you select. If the hole is too small not enough exhaust gas bypasses the turbine and boost continues to climb above where you want it to be. An external wastegate, while desirable in high boost situations where the exhaust pressure can push open the flapper valve and make it leak, probably won't be needed IMO if you are sticking to 7psi (~200hp on a GSXR1000), unless you choose a very small turbo. I have used an internally wastegated T25 on a 750 without boost creep at up to 23psi. If you think I'm wrong, consider that Kawasaki sold over 5000 750 turbos that ran 10psi as stock and were internally wastegated without problems. One of the guys on my site has run 9.4 on his 750 turbo with the stock internal wastegate.
Take the book suggested above, and throw it in the trash. Then buy and read "Turbochargers" by Hugh McInnes. It's way better and McInnes actually knows what he's talking about from direct experience rather than relying on information from other people.
Build your aluminium plenum and fit a boost sensor. Run the grey wire on the Powercommander to it. You can then map according to boost, not throttle position. If you need to, you can fit larger injectors and fuel pump. If your bike has two sets of butterflies you will need to remove the 2nd set.
I say go for it. You will have fun and learn a lot. If you get stuck there are plenty of other home builders around that will help you out here and at other boards like Gary Evan's board http://p090.ezboard.com/bazbiketech. Good luck.
I have both "Maximum Boost" and "Turbochargers" on order right now. I read a bunch of reviews on the these books (on Amazon.ca), and most people suggest using the two books together, as "Turbochargers" has great basic technical info, but is outdated and has no real info on EFI, and "Maximum Boost" is lacking in some aspect of the technical info, but is better on the more current stuff.
Just an FYI....
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