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Hey dave you have to post with the e-mail address you are subscribed with or to make it easyer post from the same machine you are subscribed with Rick ----- Original Message ----- > 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 help get the numbers > more accurate by back calculated the volumetric efficiency.. I calced 145-155 > HP for an engine this size (assuming modern combustion chamber design/volumetric > efficiency) 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!. > > > > Non-yet Turbocharged ZX-11! (Ha!) > > > -----Original Message----- > > > From: Dave Morrill [SMTP:david.p.morrill@fairchildsemi.com] > > > Sent: Wednesday, April 14, 1999 2:46 PM > > > To: bike > > > Subject: [turbobike] ZX-11 turbocharged! - bigger turbo? > > > > > > Hello Diego, > > > Sounds like a good project. I'm not sure, but I think that your GPz > > > 750 > > > turbo may be a little small. If it is, you will probably be disappointed. > > > When swapping out a turbo from salvage and I can't get the compressor map, > > > I > > > usually do a rough cfm calc based on boost, disp, and redline from both > > > engines > > > and see if they are close. If the turbo is too small you'll be way off on > > > the > > > efficiency and have problems with surging, and probably detonation from > > > the > > > extra air heating, and just plain poor performance. > > > > > > I don't know the specs on your bike, if you send them to me I'll calculate > > > the > > > numbers for you. Need displacement, boost that your GPz ran, and redline > > > on > > > both bikes. > > > > > > You may be better off finding a junkyard turbo from a 1.5-2.0 liter car, > > > clean > > > it up and try that. I've gotten them in good shape for under $100. > > > > > > Good luck! > > > > > > Dave. > > > > > > Astorga, Diego Marcelo wrote: > > > > > > > Hi again!!!!: > > > > > > > > Hi Bill, as you say, I'm not lookin' for an astronomical boost and an > > > > astronomical waste of money for my pockets, understand?, currently I > > > have > > > > not got this number ($3000-$4000)... I'm lookin' for experience in this > > > kind > > > > of works, Do ya know what I mean?... > > > > It's not a matter if I can not gain 200-250...500 HP in the rear > > > wheel...To > > > > begin, 150 HP or lil' less, it's Ok for me, The biggest satisfaction for > > > me > > > > will be plain, do, and ride my project. With the shortest investment of > > > > money... recyclin' what I've got..., Understand? > > > > Well, I hope you can understand my english...and understand what I wanna > > > > do... and to finish my 1st. big project in this kind of work, I will > > > need > > > > all the help that everyone of you can give me. > > > > I think that's all.... > > > > > > > > Read ya later, Dudes... > > > > > > > > Diego! > > > > > -----Original Message----- > > > > > From: Bill Charette [SMTP:five0@skypoint.com] > > > > > Sent: Tuesday, April 13, 1999 1:36 AM > > > > > To: Astorga, Diego Marcelo > > > > > Cc: 'turbobike@natvideo.com' > > > > > Subject: Re: [turbobike] ZX-11 turbocharged! > > > > > > > > > > Diego. > > > > > > > > > > I think everyone on the list will tell you to save yourself the hassle > > > and > > > > > just get a Mr Turbo kit. They come engineered with everything you > > > need to > > > > > get it running right, as long as you're not looking for astronomical > > > > > levels of boost. Figure $3000-4000 american. > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > > > > > Bill Charette > > > > > Five0@skypoint.com | http://www.skypoint.com/~five0 > > > DoD:#1915 > > > > > 1985 Yamaha FJ1100 > > > NRA:Life > > > > > Newton's 17th law of Life in America: For every action there is an > > > > > unequal and moronic overreaction. --R&T, 4/98 > > > > > > > > ------------------------------------------------------------------------- > > > > > >