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Your calculations look very close it would be a waist of time to put that turbo on the bike. Diego what you should do is find someone that wants to turbo a 600cc or 750cc bike and sell it to him it's a fine turbo for that size motor I think the tubro GPZ only made 95 HP Turbo Rick 350HP Turbo GSXR1100 Street bike Web Site http://www.ptw.com/~gsxr1100/ Southern California Timing Association 1998 Fastest Bike of the year EL Mirage Land speed Record holder 204.626 MPH E-mail gsxr1100@ptw.com > Diego, > Ballpark estimates: The guys on this list can probably tell you how > out to > lunch the numbers are, here goes: > > The GPz turbo is good for 200cfm at 12000 rpm 10 lbs of boost on > your old > bike. Do you know what it made for HP? I can use this to get the > numbers > a little more accurate by back calculating the volumetric efficiency.. > I calced 145-155 > HP for an engine this size (assuming modern volumetric efficiency #'s) > on a 70 deg day. > Your ZX-11 needs over 320 cfm for 10lbs of boost at 13000, looks > like over > 230 HP. It needs 200cfm stock (without a turbo). The GPz turbo is a > stretch, > I'm betting it's too small. > Try and scavenge a turbo from a 2200cc car that redlined around > 6500 rpm, > this would be an exact match for your motor, cfm wise (317cfm at > 10lbs). A lot > of the car turbos have built in wastegates, saves you $ there also. > Don't be > afraid to unclip the housings and turn them so they line up better for > your > install, even re-mount the wastegate actuator if you need to. > Remember, these calculations are from a spreadsheet I made (I don't > actually > know what I'm doing) using PV=nRT, so they could be waaay out to > lunch. The > numbers seem to be pretty close. > > Good luck, > Dave. > > Dave Morrill wrote: > > > > ------------------------------------------------------------------------ > > > > > Subject: RE: [turbobike] ZX-11 turbocharged! - bigger turbo? > > Date: Fri, 16 Apr 1999 05:51:51 -0400 > > From: "Astorga, Diego Marcelo" <diega@eastman.com> > > To: "'Dave Morrill'" <david.p.morrill@fairchildsemi.com>, > > "'bike'" <turbobike@natvideo.com> > > > > Hi Dave!!!!!!!!!!!!!: > > > > These are the specs that you will need: > > > > ZX-11: > > > > Bore x Stroke: 2,99 x 2,58 (inches) > > Max RPM:13000 > > Boost PSI: 10 (Don't laugh!) > > > > GPz 750: > > > > Bore x stroke (inches): 2,598 x 2,126 > > Max RPM: 12000 > > Boost PSI: 10 > > > > If you need something else, just tell me... > > As you see, I'm not lookin' for too much power...but, anyways, maybe > the > > next weekend I will try to find out a junkyard turbo... > > Well, thanx for your attention... > > > > Read ya later guys!!.... > > > > Diego!. > > >