79 GS1000 turbo, anyone w/experience?

[4x4fab]

I have a 79 GS 1000. The motor is fresh, stock with a welded crank. The bike itself is sorta a rat. I would love to turbo it this winter. I could do all of the fab work no problem at all.
I am wondering if anyone here has done it before, or could atleast reccomend a turbo. I can get (free) a good turbo from a 4cyl mazda car. It may be too big??
I know I'll have fuel supply issues, and will have to install a pump. Where would be the best place to tap in for oil supply?

I have been dreaming this all summer long, I'm really serious about it, please help.................

 

[4x4fab]

I should add, this is not gonna be a drag bike. Yeah, I like to abuse it though. Anyone have a feal for how much the trans can take in stock form?

give me some turbo parts and I'll give you my v&H 4 into 1, and maybe even powder coat it for ya, hehe......

 

[4x4fab]

And I guess I'd better plan on a camshaft too. Any clue to a good exhaust lift numbers? I've heard that 112 is pretty good for these motors running a turbo???

 

[posplayr]

a lotta discussion here

a lotta discussion here

http://www.thegsresources.com/_forum/showthread.php?t=94468&highlight=turbo+exhaust

or do more of a search

Posplayr

 

[lecroy]

Blower's is a blown bike, not turbo. Agree, use the search. Also goto
http://oldskoolsuzuki.info/ and look under the inforboards and forced induction
dragbike.com also has a turbo section in their forums.


I have never owned a 1000 so can't be of much help. Doubt the 2-valve is going to make much difference for what your wanting to do. Just turn the boost up if you want more power.

Terry set all those records with stock cams in the 1100. I use a stock head with pretty much stock cams on my 1100.

The stock 1100 can take some abuse. I ran a F/F RaJay on a stock 1100 for a few years with no real problems. Pressure was maybe 7PSI or so. I ran a stock 1100 backcut and helical gears deep into the 8's with my car tire bike. Tranny turned out to be the weak link. Now using billet gears and shaft. Never had and troubles after this.

If I were you, I would leave the motor stock and focus on the turbo. You can get away with a lot when you have a small tire.

Are you going to blow through or draw? Inject or carb? All my stuff is old draw carb. Simple to setup. Guys here have done blow through with injection and carb. Search!!

I have used F/B F/F and E/F 40AR combinations with the RaJay. For you I would think a B/B would be fine for low boost and be very smooth. The F/F on my 1100 was a lot of fun and very reliable. Rajays are nice because they are small. Problem with them is finding parts and it may cost more than buying a brand new style turbo.

Ball will require liquid cooling, so you will need a sleeve bearing and if your a draw system, a carbon seal.

Oil supply for the Garrett is the same for the RaJay. A new 1100 pump with 750 gears will work. Not sure on the 1000. You will need to make a block to tap off of.

My advice, when it comes to tune take it slow and start VERY fat. Work your way down. I have melted a lot of parts from lack of fuel. Keep track of the oil pressure! Parts are expensive and its pretty easy to junk that welded up crank of yours in a few seconds.

Be sure and post some pictures as you progress.

 

[posplayr]

Show how much I know

Show how much I know

Blower's is a blown bike, not turbo.

........

Posplayr

 

[yj4x4]

Pretty sweet build:

http://members.home.nl/marcovandevelde/turbo GSX06.htm

 

[4x4fab]

Thanks for the info already. I have been searching around. Although my power has been out since sunday from a wind storm. I'm at work right now.

 

[4x4fab]

Alright, I have in my posession a good (used) turbo from a Mazda MX6. I have been searching on this turbo and haven't found out too much.
I am hoping that someone with expierence can give me some insight on wether or not it would be a good turbo for my bike or not.
The specs on the turbo are as follows.

IHI Turbo
Turbo spec. BJ11 8903
Serial # RHB5 06216A
Parts # p220 B



it's killin me, I really want to turbo this bike. I'm scared that I don't know too much about turbo's. The fabricating is nothing to me, and I could probably make it through tuning. I'll be tearing the bike down for powder coat and paint this winter, and if I'm turbo'ing this thing I need to do the fabricating before I pull the bike apart. What do you think, good turbo or no???

 

[4x4fab]

Oh, and to answer previous questions. It will be a blow through setup with stock carbs. I'll keep the boost low enough that hopefully i wont need a fuel pump ~9-10 psi.

 

[ArttuH]

Unfortunately I can't say much about the turbo because IHI doesn't provide much specifications for their turbos. But I have a feeling that RHB5 series could be at right ballpark

If you can provide some additional details about the turbo we might be able to give estimation about it's suitability.
-How much power that MX6 has? Engine displacement and rpm of maximum power?
-Diameter of compressor and turbine wheels? You can measure these from inlet of the compressor and outlet of the turbine.

With blow through setup you will need a fuel pump and a pressure regulator. Fuel pressure must be always slightly more than the boost pressure. Otherwise you can't get fuel to the float bowls. There is quite good description how to make a blow through setup: http://forum.oldskoolsuzuki.info/cgi-bin/Yabb/YaBB.pl?num=1107708284

 

[4x4fab]

thanks, I will dig up that info. I thought that with a blow setup if you keep boost under~10 psi, stock fuel delivery was adequate. Maybe not though. I should probably set it up with a pump regardles either way. That way I wouldn't have to worry about leaning it out on the top end.

 

[cbxchris]

I don`t have time right now but I will tonight. I have 30 years of turbo experience believe it or not starting with a 1978 GS1000. You have a lot of work ahead of you. Not only in turbo design but in the engine.

 

[4x4fab]

I don`t have time right now but I will tonight. I have 30 years of turbo experience believe it or not starting with a 1978 GS1000. You have a lot of work ahead of you. Not only in turbo design but in the engine.

great, just what I want to hear, some words of incouragment.
nah, really, I know it's not just a simple project. When I tell most people what I'm doing they say, oh that shouldn't be too hard. yeah right!
I do want to keep it somewhat simple though. this is a road riden bike, not a race bike. The motor will be stock, except for the welded crank. I'm not looking to push this thing to the limits. I want the most reliable setup I can.

 

[Busafied]

I sold an IHI RHB5 to a guy in canada he bought it for his 750, it should be fine for your 8v1000.
I used to have a map for it somewhere let me see if I can find it.
Fuel Pump & Regulator are a necessity not an option, for the reason mentioned.

GL-
Ron

------------------


here with some helpful explanation:

http://www.mx6.com/forums/1g-faq-submission-area/140946-ihi-rhb5-vj11-compressor-map-psi-plots.html

google search string:

http://www.google.com/search?q=ihi+...s=org.mozilla:en-US:official&client=firefox-a

 

[4x4fab]

Thanks for the info. Soon I'll start searching for a pump and regulator. I need to figure out the specs on the charging system, and choose a pump.

 

[Giblet]

He should know. Ever tried to keep up with a turbo Busa on a GS1100GK? Can't be done.

I sold an IHI RHB5 to a guy in canada he bought it for his 750, it should be fine for your 8v1000.
I used to have a map for it somewhere let me see if I can find it.
Fuel Pump & Regulator are a necessity not an option, for the reason mentioned.

GL-
Ron

------------------


here with some helpful explanation:

http://www.mx6.com/forums/1g-faq-submission-area/140946-ihi-rhb5-vj11-compressor-map-psi-plots.html

google search string:

http://www.google.com/search?q=ihi+...s=org.mozilla:en-US:official&client=firefox-a

 

[cbxchris]

OK, now I have some time. For your application a smaller turbo is better. Less time to spool up and more forgiving. I have always used a aftermarket type kit with modifications. I noticed you mentioned using all four carbs. I think that would be a huge mistake for several reasons. You want to use a butterfly type carb set up. With high boost it will stick the slides against the side of the carb body. NOT GOOD. I`d recommend a S & S for simplicity sake but some ran zeniths(OK) and mikuni's(better). As for fuel delivery I recommend a return type system. In in other words the fuel you do not use is returned to the fuel tank. Any other type system is a compromise. I once had a couple 5 gallon buckets of pistons to prove this point. DON'T COMPROMISE. Since you are building your own pipes the quicker they converge the better. A simple spring type boost release will be fine. Bigger pipes aren`t always better for a street bike. I have no idea what type intake manifold you intend on making but buying one would be a lot easier. Then you can make any adapter needed to mount your carb/air filter.


Engine.

Chunk the stock pistons. No joke. I recommend J&E. The ring lands will break in the stockers. Stock rods are fine for street use. Get a billet clutch basket. The fingers will break off...again no joke. Undercut the tranny or you will start jumping out of gear in 4th after some abuse. If you want to help your performance over a stock engine install 1mm over exhaust valves and clean up around the valve seats and have someone make them bigger with a serdi/etc. No porting in necessary. Clean up around the stock intake valve seats(serdi) and leave the stock valves in. No cam needed. Good valve springs are a must. Adj cam sprockets are required. O`ring the cylinders with piano wire and use a good annealed copper gasket. We had a nifty set up where we cut out the gaskets/cylinder and ran GSXR stud o rings ...never leaked. Replace the cylinder studs with APE,etc and honestly case studs would be nice. I never ran a over drive oil gear,ever. Never burned a turbo up either. Make sure you have a good cam chain adjuster. Run GOOD fuel when on boost.

May not be what you want to hear but its what I would do. Putting a turbo on a virtually stock engine is just a disaster in waiting. There is no need to have a turbo if you`re not going to turn the boost up.

Good luck......

 

[4x4fab]

OK, now I have some time. For your application a smaller turbo is better. Less time to spool up and more forgiving. I have always used a aftermarket type kit with modifications. I noticed you mentioned using all four carbs. I think that would be a huge mistake for several reasons. You want to use a butterfly type carb set up. With high boost it will stick the slides against the side of the carb body. NOT GOOD. I`d recommend a S & S for simplicity sake but some ran zeniths(OK) and mikuni's(better). As for fuel delivery I recommend a return type system. In in other words the fuel you do not use is returned to the fuel tank. Any other type system is a compromise. I once had a couple 5 gallon buckets of pistons to prove this point. DON'T COMPROMISE. Since you are building your own pipes the quicker they converge the better. A simple spring type boost release will be fine. Bigger pipes aren`t always better for a street bike. I have no idea what type intake manifold you intend on making but buying one would be a lot easier. Then you can make any adapter needed to mount your carb/air filter.


Engine.

Chunk the stock pistons. No joke. I recommend J&E. The ring lands will break in the stockers. Stock rods are fine for street use. Get a billet clutch basket. The fingers will break off...again no joke. Undercut the tranny or you will start jumping out of gear in 4th after some abuse. If you want to help your performance over a stock engine install 1mm over exhaust valves and clean up around the valve seats and have someone make them bigger with a serdi/etc. No porting in necessary. Clean up around the stock intake valve seats(serdi) and leave the stock valves in. No cam needed. Good valve springs are a must. Adj cam sprockets are required. O`ring the cylinders with piano wire and use a good annealed copper gasket. We had a nifty set up where we cut out the gaskets/cylinder and ran GSXR stud o rings ...never leaked. Replace the cylinder studs with APE,etc and honestly case studs would be nice. I never ran a over drive oil gear,ever. Never burned a turbo up either. Make sure you have a good cam chain adjuster. Run GOOD fuel when on boost.

May not be what you want to hear but its what I would do. Putting a turbo on a virtually stock engine is just a disaster in waiting. There is no need to have a turbo if you`re not going to turn the boost up.

Good luck......

I hear your point, and I take it for all it's worth (a lot). The turbo will have to wait, if I do all these things ($). Waiting may be the wise thing to do? I don't like do to projects half-way. I'm ussually, go big or go home kinda guy. I was under the imperssion from others that a stock motor would hold up fine under ~10 psi boost.
My thoughts were this..............I have a turbo (cheap), I can easily do the fab work myself ( no poblem), I can keep it mild now and next winter I may tear down, do lots of upgrades and make it wild.
My thoughts were that I would have all of the fab work done, a functional turbo setup, a bike that I could ride next year. Kinda like phase 1 and phase 2.