Circles?
Fair comment, but appreciate I just cannot get my head round the fact someone will spend all that time, money and effort to carry out a mod` like this knowing full well the engine is likely to dump its guts as a result. Its just bad Engineering and goes against everything I have ever learned and the experience gained.  I never said it was impossible to fit and run with a turbo but its a very involved modification and  the way it stands now, the plan has more holes in it than a welders t-shirt! But as you correctly say it is someone elses project so lets stand back, let him get on with it and see how far off the ground it actually gets.

Enough Said.

Well lets see how he handles the heat situation. Thats the biggest problem. I mean after all air cooled turbos aren't that rare are they? Its just a matter of not going overboard on the pressure.

And yes since its someone else's project. I think a lot of us are going to just sit back and watch what happens

I want to laugh after you buy a car turbo......

let me know when

Quote from: rangerbrown on July 10, 2006, 07:16:48 PM
i mean a bike is a toy not a main mod of transportation. and if it is. then i feel sorry for you.

I don't feel sorry for me.

I've logged 3kmi on my GS this summer and less than 1kmi on my car, and I feel great about it.

Quote from: CirclesCenter on July 11, 2006, 01:27:43 AM
...

I mapped the points you gave me (4.5k 9k and redline) And with 10 psi (at 9 k) you're looking at around 65 hp.

This is a rather large RPM spectrum we're looking for power over. Might want to narrow it to a 4.5k to 9k or 7k to 11k. Would make stuffing this all inside a compressor map a HELL of a lot easier.

If you are going to run the bike over 10.5 K You will also have to do some head work.  I think that this might already be in the plan but not sure.   

Quote from: rangerbrown on July 10, 2006, 07:16:48 PM
i mean a bike is a toy not a main mod of transportation. and if it is. then i feel sorry for you.

The GS is my main mode of transportation. I commute back and forth to work, school, run errands on it, visit my girlfriend 90 miles away (or 300 miles in the school year, both one way) on it. I do everything on my GS.

me 2, i sold my car for my gs. and u shouldt feal sorry, its the best desicion ive ever done

Ok I am gonna weigh in on this subject. Dependability first, If my GS were my only mode of transpotation (and I rode in Oklahoma year round from 89 to 96) then by all means I would say please dont spend your money on a turbo project. But if you have other wheels then I say go for it. I found this thread because I am planning on trying a similiiar project in a few years when I have a second bike that way even if I blow my GS up I can still ride till I get a new motor. Now I as far as dependable mileage from a bike I have no idea what the GS will get for me but my 81 wing went 195,000 miles for me in 8 years time and I bought it with 40,000 on it already. My first ever Suzuki a 79 GS750 had 92,000 miles before I broke a cam chain and had to rebuild the upper end. Sledge if you get only 20K from a bike you must ride em harder than they were meant to be pushed and not PM like should be done.And a final note Ranger has a sound idea and does not appear to be planning on going to excess I bet he will get great longevity from his turbo motor. Lets all see how it goes.

http://gstwins.com/gsboard/index.php?topic=28403.0

195k out of a Goldwing dont surprise me at all, its a touring bike. It has a large capacity, heavy, slow revving and understressed engine designed to chug along all day every day at more or less the same engine speed and rack up huge mileages because this is what touring bikes are expected to do. It simply cant be compared to the GS5 engine, same with the GS750  engine which is another old, heavy and over-engineered design. I cant imagine performance as being a high priority in the design brief when the Honda Engineers all sat down to start sketching out that old flat-four. If you rode your `wing like you would.... say an R1 would you expect to get 195K out of it without major engine work? Lets be realistic, it simply wouldnt happen. Bike engines are not all the same, they are designed for a role thats dependent on which niche of the market the bike will be sold in, be it ecconomy, performance, longevity competition etc.
The figure of 20k I mentioned is not what I expect the maximum lifespan to be for a GS5 engine to be, rather the figure at which I expect engine wear to begin to make itself felt and become a concern. Bearings, journals, camshaft and followers, valve guides pistons and bores, cam-chain etc etc etc etc will all have started to show signs of wear at this mileage and may well be outside the Makers specified tolerances, even with correct maintainence and regular oil changes. You state "Reliabilty first" then go on to say "I bet the turbo motor has great longevity" Thats a contradiction in terms. Even the "Turbo Experts" in the other forum have stated he must first rebuild the engine, yet he has chosen not to and continues to be selective with regard to which advice he chooses to accept or dissmiss. Whats the point in asking someone for advice if you are then going to argue with that someones opinion. If the project is done correctly, and in my view thats with reliabilty in mind, it will be a huge achievement for which he deserves serious credit..............but if he carries in assuming the crank and bottom-end can safely and reliably handle a huge increase in HP without being uprated.. ......ultimately it will all end in tears.

Rode the wing like I stole it!!! trips to new orleans from tulsa that only took 8 hours and ground down 2 sets of pipes cornering. Hardly typical tour riding that bike rarely saw the underside of 90mph. Engineers are pretty smart and have to know some body is gonna figure out how to get the most out of a motor. A 9.0:1 compression ratio is the ideal starting place for a turbo motor, I shudder to think of the comp ratios on a modern superbike if it were to be turboed. Hmmmm 12.5:1 mount a highpressure injector pump and run diesel with a turbo. Might have to try it!!!

i would have to say, after the 14,000 miles i have on my gs. it has very little wear on it.

cam shafts have no wear (or little) timing chain/gears show no signs of any wear.
little to no oil has ever been used, compression still as high as when i got it with 1700 miles

i would liek to perform a leak down test to see what shape the rings are trully in.

in my honest opinion, the gs is more than capable off 100k befor some type of tear down rebuild.

this being said, sure like i said before.

keep the idea simple, dont over do it in hopes for big power, and dont go blasing down the hwy every day at 8-10k and think that a turbo gs would ever last.

like i said, the most if any thing, i would like to see 80hp and 40-50 tq still with in resonable ranges as the gs makes 35tq and 50 hp if tuned right.

big things to get out of the way,


HEAT,
timing
fuel
fuel delivery
oil pressure and temp (again much larger cooler after the turbo, and then a possable reserve tank)
mixture of the fuel (aircraft engines that are N/A and forced induction are runing way rich, for cooling, once off the ground they can be trimed. looking into this as a possable leway)

the rest is easy
if going carb build box and tune as needed (although i know this will be a major pain in the ass)
turbo mounting
exhust routing
intake routing
varable timing
and much more

Quote from: rangerbrown on July 11, 2006, 05:42:38 PM
varable timing
and much more

another plus of using MegaSquirt... with the MSnS-E code you can use it to decode the stock crank wheel on the GS, using the stock VR sensor (pulse generator), and drive the stock ignition coils, thus giving you total ignition timing control.  There are also plenty of other features availible that might be useful for this application 

But I think you'd get tired of 80 hp before too long.  Then you'd want more.
I just can't imagine anyone ever wanting to buy your GS from you with a turbo on it.  Would you buy a used bike that somebody turboed?
I just can't believe that there isn't a production bike that would suit your needs for flick-ability and more power.

Oh, wait.  There are tons of them.  Nevermind. 

Its the fun factor of doing it and then being able to show it off and I did that

Since everyone else is always honest here, I will be too.

This is stupid, if you ask me.  Especially on a bike as nice as Rangerbrown's.   That is my opinion and nobody gives a rat's ass, but I never state my opinion, so I thought I would.  You could easily buy a bike more flickable and with more power than a GS500 with a turbo.  It would be different if his bike was a cobbed out 89 model.  I still don't think your friends will think it is cool, even if you pull it off, which you won't. 

yo sorry im with jake d, if you want more power than upgrade, if not learn to be happy with what ya have and can do with out spending a rediculous amount of $$$

back in 2001 i had some extra $ sitting around

I was going to build a big monster engine

I had a GR650 engine
I had a GS400 8 VALVE engine
I had FJ1200 pistons
I had race cams

and after thinking about it for a while....I bought a 1992 honda RS-125 GP race bike
for the same amount of money.....
I have since gotten rid of all the GS engine goodies

well except for the cute little turbo sitting on the shelf
might use it
might just look at it
might turbo a Z-50 for sh!ts and grins

I have just placed a reminder in Outlook for 3months time....It says "Post question in GStwin forum, ask Rangerbrown how far he has got with the Turbo project" 

sigh... some people just don't understand... it's not about the power, it's about the challenge of making that power, it's about using your BRAIN and your own two HANDS to solve a problem that in all reality does not really need to be solved

back in the day, before sports cars and sports bikes were as common as they are today, you had to use your own skill and talent to modify what was out there to perform the way you wanted it... there wasn't an 'aftermarket' like we have today, you had to design and fabricate your own parts... you couldn't call up jardine and order your nice new exhaust system, you had to layout, cut, and weld your own from scratch... this forced people to be CREATIVE and allowed them to take PRIDE in THEIR work... today that is dying, people are losing their creativity because of things like the mindset of 'they already make one that does that, why not just go and buy it'

you see, some of us get just as much satisfaction from CREATING as we do using... personally, I would get just as much, if not more, satisfaction from turboing a GS as I would actually riding it...  not to mention the amount of pride and knowledge gained from such a project

people have turbo'd the gs before, MANY people have fuel injected carb'd motorcycles and cars before, so just because you may not know how or don't have the desire to pull this off, doesn't mean he can't

I guess those of you who would rather sit back and let others create your bikes will just never understand what this is all about, and that is just fine, this just isn't your thing.   

oh, and sorry ranger for further digging you into a hole of turbo commitment