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GS500 build thread... cf tanks, internal supercharger, etc

Amazing work.

I had a pretty built-up GS500 track bike, and the one thing I thought it still could have used was a lighter replacement for that heavy tank. Very nice.
 
ekolto said:
Maybe I'm too tired but, how are you changing your intake valve timing to open on every downward stroke on the compressor side? If you don't change that your only going to suck as much air as the combustion side right? Your intake valves are going to stay shut as if it were on the combustion stroke, but you have no exhaust valves so then you'll be sucking through your exhaust ports as the piston moves down. The translation should be?
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I see you didn't even read the thread... :laughing

Cereal KLR said:
I have seen GM smog pumps used as blowers also,although on small displacement engines.
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I can confirm that this works on Briggs & Stratton motors. :toothless
 
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Roadstergal said:
Amazing work.

I had a pretty built-up GS500 track bike, and the one thing I thought it still could have used was a lighter replacement for that heavy tank. Very nice.
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Here it was before you got it.
 

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If mllcb42 was a fighter pilot, his call sign would be TINKERER. :thumbup

So creative!

IIRC we had a guy Jon Bawden in the AFM who raced a turbocharged GSXR750 a few years ago, he almost flipped the bike over backwards when cresting T9 at Thunderhill. :p
 
mllcb42 said:
What are you after? I'm sure I could be talked into at the very least helping make some, etc.
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Rearsets for one. I bet you could sell a few of them to the gstwins.com people. I would love the CF Tank, but I have no doubt that it's a crazy expensive part, and I'm not sure I could justify putting that much cash into a $1500 race bike. :)
 
Burning1 said:
Rearsets for one. I bet you could sell a few of them to the gstwins.com people. I would love the CF Tank, but I have no doubt that it's a crazy expensive part, and I'm not sure I could justify putting that much cash into a $1500 race bike. :)
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I've got the rear sets posted up on gstwins.com so they'll be for sale shortly. I'll need to do a presentation about the project for a class including some videos. If you'd be willing to/have the means to take some video shots of them in use, I'd be happy to sell you a set for the cost of materials.

If you're interested in a CF tank but don't want to put out a bunch of money, I'd be happy to help you make one using the molds I made. They're just sitting here anyway.
 
I do have a bike cam I could point at the rear-sets. Next track-day is thanksgiving weekend. I don't have any plans for my track-day after that... But, if you need the video before the project is due, I'd be more than happy to at least take a couple laps around the apartment complex. :)

If I like em, I'll probably buy a couple of extra sets. Rear-sets are a common crash damage replacement part.

Question: Are you planning to convert to a linkage system on the shifter side, or to build an extended shift lever?
 
Burning1 said:
I do have a bike cam I could point at the rear-sets. Next track-day is thanksgiving weekend. I don't have any plans for my track-day after that... But, if you need the video before the project is due, I'd be more than happy to at least take a couple laps around the apartment complex. :)

If I like em, I'll probably buy a couple of extra sets. Rear-sets are a common crash damage replacement part.

Question: Are you planning to convert to a linkage system on the shifter side, or to build an extended shift lever?
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Planning on doing a linkage system.

I should have at least a prototype set ready to go by thanksgiving weekend.
 
19.8:1 ratio
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I don't think the head gasket will work, you're heating only half the head by combustion, hoping for 100% HP on a stock GS500 rod (you know that's 40HP).


It is a good motor to experiment with and a dear project to us non main streamers
 
wait if stock is 9:1 how do you think its gonna hit 19.8?!?

also with the relatively poor Volumetric efficiency of the GS head.....

Also if if matters to you my old 90 GS with low miles pushed out 32HP on the dyno... a brand new GS500 (08) ran within an hour of me and put down 33 and change.

asking for even 50% is gonna be alot of stress on the parts.

STILL ROOTING FOR YOU THOUGH!!!

if your crazy idea work i might just have to convert my ninja into a 300CC LOL!
 
I don't post much here, but this is one of the most impressive threads I've ever seen.
 
Told all my bike friends about this. No pressure :)

My gut tells me the head gasket might be the weak link here, but what do I know? I think I'm convinced on the con rod strength requirements though... Good luck!
 
Alexey said:
Told all my bike friends about this. No pressure :)

My gut tells me the head gasket might be the weak link here, but what do I know? I think I'm convinced on the con rod strength requirements though... Good luck!
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It's entirely possible. Between the higher pressures and the uneven heat distribution. This is an area where a v-twin would be far superior to a parallel twin.

That said, by switching over to fuel injection and electronic ignition control, A LOT of leeway is found as far as how much the compression can be bumped up over stock. This is a very stout little motor that works with very minimal fueling/ignition controls. We'll see


If it doesn't work well, I can still run the motor fuel injected, etc, which should offer some major improvements over stock.
 
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