84 GPz750 Turbo
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From: ogden on 14 Jan 2010 11:01 wrote: > In uk.rec.motorcycles.classic ogden <ogden(a)pre.org> wrote: > > > I lusted after Chewits and a Liverpool home strip in 1984. Doesn't mean > > I'd want either now. > > Especially if you live anywhere near Reading :-) I fear you've mistaken me for Adie or anyone else who might be interested in Liverpool's current fortunes. I got bored with it when I was about 10. -- ogden
From: Kevin Gleeson on 14 Jan 2010 18:35 On Thu, 14 Jan 2010 13:43:53 +0000, Champ <news(a)champ.org.uk> wrote: >On Thu, 14 Jan 2010 12:57:12 GMT, Kevin Gleeson ><kevingleeson(a)imagine-it.com.au> wrote: > >>>>>> http://www.leossouth.com/pre_owned_detail.asp?sid=06731684X1K13K2010J4I22I53JPMQ701R0&veh=1415481 > >>Never ridden a turbo bike but owned lots of turbo cars. Was gunna >>turbo my VF1000R in 1985, but got distracted by a race engine from >>Malcolm Campbells superbike that went instead (Google his name you >>pommy bastards). > >Some of us don't have to :-) > >>Then when I was getting bored with a souped up Hayabusa in 2002 >>(bloody thing was only getting 138kW at the rear wheel) I was going to >>turbo that. Then a divorce intervened. >> >>Unless they are set up well, and I don't just mean the motor, a turbo >>bike would be quite a handful. > >The factory turbos were not the handul that most backstreet >conversions were. The GPz is acknowledged as the best of the bunch, >an it's no handful at all - just huge torque [1], right in the >mid-range. That sounds sweet. What sort of PSI does the turbo run?
From: Lozzo on 14 Jan 2010 19:12 Kevin Gleeson wrote: > On Thu, 14 Jan 2010 13:43:53 +0000, Champ <news(a)champ.org.uk> wrote: > > The factory turbos were not the handul that most backstreet > > conversions were. The GPz is acknowledged as the best of the bunch, > > an it's no handful at all - just huge torque [1], right in the > > mid-range. > > That sounds sweet. What sort of PSI does the turbo run? From memory I think the GPz750 Turbo only ran at about 7 psi. Apparently they don't start to detonate until they are above 14 psi, so there's a large margin for error -- Lozzo Versys 650 Tourer, CBR600F-W racebike in the making, SR250 SpazzTrakka, TS250C, RD400F (somewhere) Garage clearout - Yamaha SpazzTrakka 250 for sale, email for details
From: Fraser Johnston on 14 Jan 2010 21:31 "ogden" <ogden(a)pre.org> wrote in message news:MPG.25b91ea42b233e3a989df4(a)news.eternal-september.org... > Mark Olson wrote: >> Champ wrote: >> > On Wed, 13 Jan 2010 17:55:56 -0600, Mark Olson <olsonm(a)tiny.invalid> >> >> >> Given the glacial pace of sales at most dealerships now, I imagine the >> >> selling price might end up nearer $5k or less. But given the rarity of >> >> clean unmolested examples of this iconic bike, who knows. >> > >> > So buy it then :-) >> >> I've already got four bikes, and ... hmmm. >> >> I would love it, I had an '82 GPz550 and an 81 KZ750 plus a '77 KZ650. >> It would round out my Z ownership experience for sure. I lusted after >> one for sure back in 84. But it would eat up a good share of my bonus >> and I'd rather spend the money on road trips. > > I lusted after Chewits and a Liverpool home strip in 1984. Doesn't mean > I'd want either now. For me it was Kathleen Turner until I saw her on the telly the other day. Barf. Fraser
From: Champ on 15 Jan 2010 04:03
On 15 Jan 2010 00:12:41 GMT, "Lozzo" <lozzo(a)lozzo.org.uk> wrote: >Kevin Gleeson wrote: > >> On Thu, 14 Jan 2010 13:43:53 +0000, Champ <news(a)champ.org.uk> wrote: > >> > The factory turbos were not the handul that most backstreet >> > conversions were. The GPz is acknowledged as the best of the bunch, >> > an it's no handful at all - just huge torque [1], right in the >> > mid-range. >> >> That sounds sweet. What sort of PSI does the turbo run? >From memory I think the GPz750 Turbo only ran at about 7 psi. There was a high variation - the test in factory manual said the wastegate should open between 7 and 10psi. Consequently, some people fitted secondary wastegates to control this. Also, if you snipped the 'magic wire' in the loom to put the ECU into 'race mode', it richened the mixture and you could run more boost more safely. >Apparently they don't start to detonate until they are above 14 psi, so >there's a large margin for error When I had a second wastegate on mine in the 80s, I used to run it to about 14~15psi. -- Champ We declare that the splendour of the world has been enriched by a new beauty: the beauty of speed. ZX10R | Hayabusa | GPz750turbo neal at champ dot org dot uk |