Home-grown GS (X) 1100 turbo *DYNOSHEET*

[Hoomgar]

Re: answers

Hi Guys,
Thanks for your overwhelming response, Although a lot is explained on the webpage, I'll try to answer as good as possible:
1)HOOMGAR The turbo is indeed midship mounted, you can look at a detailed pic on the webpage


Webpage: http://home.wanadoo.nl/marcovandevelde/turbo%20GSX.htm

Greetz, Marco.

Thats excellent Marco. I was high or something when I posted that because I missed your web link in the original post all together. I checked it out. Very awesome indeed

[lecroy]

Is this some kind of home made blow off valve?

Thanks for posting other pictures of the manifold. I have never seen anyone try to make a part like this from glass and resin.

[katman]

Looks KILLER...LOve it.

[Anonymous]

That is freakin awesome! So that kind of turbo doesn't require a waste gate? are the fins on some type of hinges or something? What's the tradeoff?

[marcovandevelde]

Hi Guys,
Lecroy, the blow-off valve is not home-made. It was new and relatively cheap on ebay usa from a company called Zerotek, intended for a dodge viper. It's not the loudest but well made, and needed to protect the turbo from lethal surge.

Mookie, The speed of the turbine is regulated, indeed, by hinged fins inside the housing. There are some tech. sites on it, for example on

http://essay.studyarea.com/essay/Physic_Chemistry_Space/11.shtml

In theory you don't need a wastegate as max. pressure is limited by the backpressure of the (normally long) car exhaust. As I have a very short exhaust I probably need to fit an external wastegate to protect the system. The VNT can be regulated somewhat, so I'm not sure yet. The tradeoff is that it is a bit bigger (housing) and that in time the fins tend to stick. Garrett put in millions of $ in developement, so these VNT's run for a couple of hundred thousand kms' without problems.

Greetings, Marco.

[snowbeard]

sweet ride!! lots of fun in that! 8)

[Anonymous]

Hello Marco,

At first: Very nice job! Looks really great!
Is the tuning of the mixture getting alright now?

But I'm having 2 questions about your system.
1) Where do you get the neccesary oil pressure for the turbo? (an extra pump?)
2) Why did you choose a turbo from a diesel? As far a I know these are not intended to be used on a gasoline engine (exhaust gasses from a diesel have a lower temperature).

I found a link on a dutch forum about your project.

[Anonymous]

Tony,

I can't answer for the above bike but locally I've seen a Hayabusa turbo with the turbo connected to the header and a small lead-in pipe going to an intake plenum / small exhaust pipe coming from the turbo and no muffler and its not nearly as loud as my CBR with an m4 full system. The hiss it makes while shifting gears is wicked though!

ya mean like this :twisted:



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marcovandevelde, nice project!

I saw your post about it on SuperKaos.com

The gate is a must, no boost control = toasted bits

The VNT may be controlled totally diff then Normal Turbos, dunno.

You know I will have to do the GS over the winter now don't you ? :twisted:

[marcovandevelde]

TURBO ON THE ROAD

Hiya Guys,
Since the last post I had the chance to put a new (stronger) stainless plenum on it, and really go for it on the road.
The problems with the fuelling going bad at transit from vaccuum to boost are gone due to the new o-rings in the floatbowl-Ts. It now runs as clean as it did with only the bigbore and pods; sweet as a babies' bottom.

The power and acceleration are absolutely stunning! It truly has to be experienced to be believed.

WARP SPEED MR.SULU! :twisted: :twisted: :twisted:

The VNT works well, a bit too well actually, as it will spin over 15 psi on the revs, triggering the blow-off valve to protect the engine. This will be fine tuned by opening the vanes a bit more. The turbo starts boosting from 3,500 rpm onwards with an initial 7 psi, then climbs to 15 psi at 9,500 rpm. It gets a little too hot to my liking, and so the std GSX oilcooler will be replaced with a large GSXR one when the postman brings it in.

I'm also looking into a simple water-injection system as it will make life for the big'ol lady a bit easier.

The noise it makes must be one of the most orgasmic things available. It's fairly quiet at idle, as the vanes are closed, muffling the engine well. Then when boost comes in the vanes open up (like an Exup or PAR valve) to let the engine breathe more and get a good howl from the engine. The bike whistles, goes HISSSSS and propels you forward in a way that makes you an instant addict. Close the throttle and the bikes' blow-off valve flutters to make onlookers wonder what this stock-looking bike is doing.

Don't know about you, but to me it looks a million dollars! New pics at http://home.wanadoo.nl/marcovandevelde/turbo%20GSX.htm


TO BE CONTINUED

Marco.

[Hoomgar]

Marco, sweeeeet!!!

I cut my teeth on a Turbo bike. Riding one is like nothing else!

I share your joy man

[lecroy]

Much nicer. I like the bug catcher.

[morthrane]

You never did mention... how did you deal with the oil pressure problem?

[Anonymous]

Very nice indeed Marco.

[marcovandevelde]

Hi guys, Thanks for your compliments!

Lecroy, Can you tell me, as an experienced turbo-rider, what is the best way to launch a turbobike? I've 1500mm wheelbase, but am a bit afraid to flip it so I'm not the fastest at the lights right now. Although I catch anything back within 100m or so. Also, do you use water-injection? If so, how do you determine the spraynozzle you need?

Morthrane, I don't recall which problem you refer to, but I put GS750 pumpgears in to accomodate the turbo's needs, and the oillight flickering was because the oillevel gets drawn too low 'cos the turbo circulates quite a bit of oil. So I topped it up to the max level indicator and the problem is gone.

I hope I can show you all a dynosheet in a month or so, when everything has settled.

Greetz, Marco.

[Anonymous]

The original engine where the turbo came off uses an oil pressure in the range of 40..100psi. What kind of oil pressure produces a GSX?
Just curious.

PS: If youre attending a bike-meeting in the near future please let me know, I would like to hear the sound .