Z1OwnersClub GB

turbo arrived today i was like a kid on christmas morning it looks fine to me [which means nothing as i dont know my arshole from my elbow] just missing a wastegate and a carb .tried to fit it on the harris but dont think its going to fit ,the frame is in the way does anybody in zedland know if it can be made to fit without chopping the frame ? if not plan b is to fit it to the 900 this is where i really need help do i need to check the compression ratio ,have the crank ballanced and welded? anything else i should consider ? i think im going to be a regular poster here any help appreciated cheers noel

There was a Harris Turbo Z feature bike in Superbike back in the 80's.
I did have the feature somewhere and if I can find it Noel,I'll send it down to you.
Good luck with it

Good to see ya here Noel.

I'm afraid that I don't know me arse for me elbow either when it comes to turbos - but you have stirred my imagination - praps my next bike should have a blower!!. Big fluff should be able to give you some advice. Giving Steve Debben a phone would be the best place to start. He's very helpful and knowledgeable and will be able to supply you any bitz you need as well. Steve makes his living selling bits and tuning bikes, but he is proper old school and has a passion for what he does and is very generous with his time helping people with their projects.

You visiting Calstock? if so see ya at the weekend if not seez yaz at the South West rally

Noel, if the frame is getting in the way of the header then you will probably have to bolt up the plenum, turbo and transfer pipe to the bike and knock up a new header to suit the frame. Regarding the wastegate, if I remember correctly Tial external wastegates can be found on ebay fairly cheap, probably cheaper still if you get it from the states. I would consider a Mikuni HSR 42 to sort out your carb problems. Cost about £240 from USA and fairly easy to set up.
You might get away with the stock pistons if you are only planning on running a small amount of boost just to pep it up for the street (about 4-5psi) But if you plan on winding up the boost then you might want to fit forged pistons (wiseco or similar) and maybe weld the crank up
Regarding the fine tuning of your system have a word with Dave email fastbyme@aol.com. He's a very helpful guy and knows turbos like no one else.
Also pay close attention to your oil supply to the turbo. As the roller bearing crank engine only runs a low psi compared to the shell bearing cranks. You will probably find an inline oil restrictor in the kit that is supposed to increase oil psi to the turbo.
If you have to make up a new header pipe and don't need the old one I'd gladly buy it off you. My 1000j is going for the turbo treatment over the winter.
Good luck you won't regret it.

london calling wrote:There was a Harris Turbo Z feature bike in Superbike back in the 80's.
I did have the feature somewhere and if I can find it Noel,I'll send it down to you.
Good luck with it

I think the bike that Jack means was owned by the late Dave Grant, who ran a company called Braided Steel. They are still in business doing braided hoses, fittings etc..
I can probably search out the magazine for you, if Jack can't. The bike was also featured on the Crossbow calendar too.

They trade as BSR, and are very helpful...

I believe his wife now runs the show

Stalker,I don't mean Dave Grant's bike.
I'm sure the guy who built this Turbo'd Harris was called Hawkins
It was red and I'm sure pretty much the whole bike was red.
Definitely in Superbike,maybe 86/87 era
Typical STALKER,I'll just go through all my old Crossbow calenders and look at all those boobs,er,um,I mean bikes

Avon Calling - he won't answer for a while, hes stuck up in his LOFT

Hello Noel, yes we have fitted turbos to the harris, and you will need to modify the frame as the brace tube across the frame is in the way. cut out the tube and reposition another. The Red Harris turbo was sold and ended up being broken, the frame went to the Isle of Wight while the turbo went onto a silver Z900 currently owned by a friend of mine. Regards, Steve

To calculate compression ratio:-

1. Set piston at TDC.
2. Remove plug.
3. Add and record the amount of light oil you can get through the spark plug hole until it comes halfway up the plug threads.
4. Add this amount to your cylinder capacity
5. Now divide this amount by what you got in
6. This is your compression ratio

Example....
1. I get 28cc of oil into the combustion chamber
2. My motor is 1105cc, so one cylinder gives me 276.25cc
3. I add the 28cc to my cylinder capacity of 276.25, which gives me 304.25cc
4. I now divide this by the 28cc I got in, which gives me 10.87
5. Therefore, the compression ratio is 10.87:1

I would go for a compression ratio (CR) of around 8.5:1.

I would strongly advise you have all of the following:-
Welded crank, forged turbo pistons, wired liners, HD cyl studs & nuts, lock-up clutch, Mikuni HSR carb.

If you need any more help, PM me and I'll give you my tel no for a chat.
Regs, Will