GS(X)1100E turbo EFI

[lecroy]

Making some good progress. Looks like a bike again.

I like your oil pan. Ran into a problem with mine and would love to have chopped up a pan like this, but the bike sits too low so I could only gain the height of the fins at best. It looks like the drain feeds into the sump, but I don't see how you drain the oil now. I ended up trying a Ward pickup with a stock pan and it is working good so far.

Why were you porting out the turbine inlet?

In the picture it does not look like the gears are slotted.

 

[ArttuH]

Thanks for your comments.

Do you mean how I will drain the oil for changing it? I'm going to drain it by removing the drain hose from the turbo.

The turbo is slightly too small for the engine so I'm trying to improve it a bit. Especially the turbine inlet was quite restrictive. Most likely this porting will delay spool up slightly but this shouldn't be a problem since I can compensate it by adjusting the VNT mechanism.

The cam sprockets are slotted by my self. They are slotted only just enough to make required adjustments. So the slots are barely visible under the bolts.

 

[lecroy]

I thought in the picture that the bottom of the sump was not yet in place and maybe the drain would be there.

I thought the turbo looked small. I tore a little RaJay B up pretty bad when I over sped it. Just way to small for making any boost.

Looks good. I would be interested in seeing some videos of it running once you get it all sorted out. Keep up the good work and keep us posted.

 

[oldschoolorange]

Where/what did you get
speedo/ tach from?

 

[ArttuH]

Yep, the turbo is a bit too small but not badly. It keeps boost up to the top end and exhaust back pressure stays on reasonable level. But I think that porting will reduce back pressure and improve top end.

The speedo/tacho assembly is Koso RX1N. It's quite handy device. It has almost all functions what you may want like two temperature gauges, fuel gauge, shift light, warning lights and so on. Only missing thing is a gear display. It came from some German web shop, it was kind of group buy with few mates. The price was about $250.

 

[lecroy]

Yep, the turbo is a bit too small but not badly. It keeps boost up to the top end and exhaust back pressure stays on reasonable level. But I think that porting will reduce back pressure and improve top end.

What was the pressure ratio before you ported it?

 

[ArttuH]

It was pretty close to 1:1, roughly. I did just few short test runs to measure the back pressure and the readings weren't very clear at top end. For some reason it wasn't so easy to stare at the gauge beyond 6000 rpm throttle wide open

 

[lecroy]

That was pretty good. Why even port it? I figured it was going to be 2:1 - 3:1.

 

[ArttuH]

Why to port? Why not? I'm going to try out all kind things with this engine just to collect some experience about turbo engines. Then I can build another engine for some real power and do it right at once (dream on...).

I have read and heard all kind rules for the pressure ratio. Some say 2:1, most common seems to be 1:1 and some say even 0.5:1. So I guess that 1:1 is already pretty good but there is still room for improvement.

 

[lecroy]

For a street bike I would think you would want to be very close to 1:1. On a drag bike the ratio closer to 1.5:1 - 2:1 Ex,In. But these bikes are not rode around town. They run wide open all the time. Seems like your near perfect.

 

[ArttuH]

The schedule seems to slip big time. I have been a way too busy with another building project and I have done almost nothing for the bike during last month.

It's have been very frustrating to see summer passing by while the bike sits in the garage. To help this I did a "clever" move and got another bike.

Officially I bought it for my missus but fortunately I can borrow it "sometimes" Quite nice ride but I guess that GSX will feel especially fast when I get it back on the road.

 

[ArttuH]

Actually I have done something with the GSX too. Not much, but here are few pictures.

Front mudguard got new paint.

I discarded plans to control the VNT vanes electronically, for a while. I mounted old pressure actuator back. It just needed new location since the turbo is changed. Hope that it won't catch the ground.

Gauge cluster layout is ready.

Wiring harness under construction...

 

[first timer]

i thnk you need to turbo that 650 as well, that would be very intresting.

 

[cloudbreakmd]

All I gotta say about the work you have done... Wow. :shock:

 

[ArttuH]

i thnk you need to turbo that 650 as well, that would be very intresting.

Yep, that would be interesting. Unfortunately it would be practically impossible to get approved around here. All the -91 and later vehicles needs extended emission check to get any major engine modification (like turbocharging) approved. This emission check costs about $2000. Older bikes like my GSX needs only a dyno print which shows that the power isn't increased more than 20%

 

[tofast]

koso speedo

koso speedo

Nice bike

The koso speedo. Is it hard to wire in the bike. Does it come with everything you need to hook it to the bike. Im trying to get some info on the koso. I looking to put it on my bike that is becoming a streetfighter. Thanks for all your help.

 

[ArttuH]

The Koso speedo is quite simple to wire, even if you are going to connect it to bikes original wiring harness. (I'm building a new harness from a scratch.) It comes with everything you need. There is universal mounting bracket, temp sensors, speed sensor with mounting brackets, etc. Only additional thing you may need is some kind adapter for temp sensor, depending on where you are going to mount it. Koso temp sensor goes directly on the place of the original oil temp sensor on GS1100.

 

[zig06]

How easy was it to install the EFI and get it programmed correctly?

 

[ArttuH]

How easy was it to install the EFI and get it programmed correctly?

Well, of course there was plenty of work and learning but nothing extremely difficult. In my case the hardest part was to find most suitable mechanical parts like throttle bodies, fuel pump etc. Electronics side was easy for me since I was already familiar with these things.

Tuning is a subject of it's own. The beginning can be challenging. You have freshly installed system which you hardly know and the bike barely idles. But when you get used to tuning and learn how the system operates it's pretty easy and fast. At the first time I spend few weeks tuning on the road and then one hour on dyno to finish the tune.

 

[ArttuH]

So it became this winters project as well... But it will be ready for next summer even if progress continues as slowly as during last few months.

Few pics about what I have done after last post.

New more compact ignition trigger setup.

Fuel lines, pump and filter mounted.