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GS Turbo

  • Thread starter Thread starter jgordon
  • Start date Start date
lecroy said:
If you want to send them to me, I can post them for you as well. Just send me a PM.

There is normally a plate on the compressor housing that has the part number. If the turbocharger has not been modified, I can tell you what you have from this number. If the tag is not on the unit, look at my turbos and tell me if yours looks like mine or not.
Click to expand...

Looks just like yours except its not near as shiny (-;
 
Your bike will run just as good with a 1150 head with 1mm over on the intake and 2mm over on the exhaust with only the seats blended in with no porting. 20 years of turbos on both kawasaki`s and suzuki`s plus wrenching on 3 funny bikes at times has showed me a lot. At one time I had a couple 5 gallon buckets full of ruined pistons. First rule of thumb don`t run wiseco...ever. MTC is a good turbo piston although I prefered arias. I never ran the mikuni`s.....big S&S`s with the high pressure seats. LOTS of fuel pressure will save you. Forget the water injection. Use good fuel. Long story but it(water/alcohol) will cause you more damage in the long run. On the GS you might need to get as low as 26 degrees before you stop tearing parts up. Forget low compression engines on turbos. A gs with 250 pounds of cranking compression is about right. It will give you torque off the line and absolutely not hurt your down track performance.
 
cbxchris said:
Your bike will run just as good with a 1150 head with 1mm over on the intake and 2mm over on the exhaust with only the seats blended in with no porting. 20 years of turbos on both kawasaki`s and suzuki`s plus wrenching on 3 funny bikes at times has showed me a lot. At one time I had a couple 5 gallon buckets full of ruined pistons. First rule of thumb don`t run wiseco...ever. MTC is a good turbo piston although I prefered arias. I never ran the mikuni`s.....big S&S`s with the high pressure seats. LOTS of fuel pressure will save you. Forget the water injection. Use good fuel. Long story but it(water/alcohol) will cause you more damage in the long run. On the GS you might need to get as low as 26 degrees before you stop tearing parts up. Forget low compression engines on turbos. A gs with 250 pounds of cranking compression is about right. It will give you torque off the line and absolutely not hurt your down track performance.
Click to expand...

250 pounds... Thats almost as much as I had with the 13.8:1's in it. How do you get that much with flat tops? I ride it on the street right now so thats why I took the Super B off, It was very hard to throttle off from a dead stop. I have a Holly Red on it and also am using MTC's.

What kind of times should I expect when I put it in the chassis?
 
A few pictures of Jeff's bike.

jg1.jpg

jg2.jpg

jg3.jpg

jg4.jpg

jg5.jpg
 
Will one of those Gixxer heads really bolt right onto a GS or GSX motor? Does that mean a GSX-R 750 head will bolt to a GSX 750 motor and add some horses?
 
isaac said:
Will one of those Gixxer heads really bolt right onto a GS or GSX motor? Does that mean a GSX-R 750 head will bolt to a GSX 750 motor and add some horses?
Click to expand...

Yes it will!!! Visit www.bertaut.com he has an instruction page on how to do it.
Dink
 
I checked out that site and can't find anything but a cursory explanation about how they did it on a bigger engined bike. Are you sure it'd work? From what I've looked at the bores on the GS(X)750 are 67mm, and the early GSX-Rs are 70mm. Is the bore spacing still compatible or not?
 
Go to Vansant.com/raceteam. No real infor. but you can see it can be done
 
It's fairly simple to do. Run the GSXR cams on the GS cam sprockets. Plug the oil drain holes in the fromt of the head. Use a Top end oiler kit. Loose the idler gear on the GSXR head. Some people run drain hoses and tap them into the top case on the front of the motor. You will see a HUGE power difference. A stock oilcooled GSXR head flows what a mildly ported GS will flow. A 1260cc kit with a street/strip ported head with G21 cams made 186 RWHP on a GS1100 Streetbike. And was ridden on the street.
 
GSXR cams

GSXR cams

Hello Mr T
can u plz elaborate more on ur GSXR cams in a 81 GS1100 head I have a 81 gs 1100 and was thinking about adding cams, any info is aprreciated.
Regards, Archie
 
That would be GS cam sprockets on the GSXR cams in the GSXR head. If you have a mild motor set up and would like a good mid and upper RPM power boost go with a set of the G3 cams for the 1100/1150. It is the largest cam you can use with stock valve guides. But a nice set of GS1150 cams is good also in the 1100.
 
umm turbos...

checkout my latest...
the crate arrived Saturday, been holding it every since....

bigun.jpg
 
On my screen it almost looks like it has a gold plateing on it. I would keep that one for my dinner table center piece.
 
Yaknow, I almost convinced myself I should turbocharge a GS.

I dislike the idea of runnign draw through. Something about not having an intercooler bothers me a bit. However... blow through is a royal pain in the butt with carburators. And unless your'e really good, it can lead to all kinds of carburation wierdness.

Now I know a guy on gstwin is running a blow through setup on a GS500E. (I think he's putting out almost a hundered horsepower...) has anyone here done a blow through setup?

OH and the most important bits. What fuel pump would be a good idea? And will a "normal" GS oil pump provide enough pressure for a turbocharger?
 
I don't understand why you think a draw system could not be intercooled. Too much pumbing? Worried about making a bomb? The backfire may have a new meaning. Worried about the fuel wetting on the intercooler?

I give some math on my site showing how I calculated the fuel pump size, top of page:
http://dickey.intell-a-sys.com/fuel.html

For gasoline, you may be able to still gravity feed it, depending on the HP and carb. type.
 
Hi Nerobro,
Why do you think blowthrough carbs are a pain in the butt?
Many guys have done this with succes, including me. The catch is at the pressurising of the floatbowls; you need a dynamic boost that is taken off directly into the airstream that comes from the turbo. This way you have a ''ram-air'' pressurising which has a teensy bit more pressure than the carb bodies get, and 9 times out of 10 you will be able to stick with your standard needles & jets, running it slightly rich! You need to replace your floatneedles with new ones too, because they often leak on the 4 psi fuel overpressure.
On the fuelpump, regulator etc. : Take the easy route and use stuff that comes off of a Yammi turboseca. I do the same on my GS1168 and it works fine, even on this bigger motor. Use the seca turbounit too if you can get your hands on one, or use one off a honda CX turbo.

I think the GS500 uses slide bearings on the cranck instead of my Gs1100's ball bearings and that means you would have sufficient oilpressure to feed the turbo. I'm not sure, measure oilpressure on the std. engine to be sure.

Lecroy, that is one IMPRESSIVE unit you've got there! Good thing about the drawthrough I think is that it looks brutal, with the carb sticking out and the small dumppipe down the side. Good ground clearance too.

Busafied, if ''only'' I had the money!...

Good luck, Marco.
 
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