bruteforce

10 years ago when the new TurboGS was just finished, I nearly died 3 times in a row within the timespan of a week. I saw that as a sign... My little 550-based GS just doesn't handle good enough to stay ahead of the power. I most certainly cannot ride with modern 600's handling wise. But I kick ass on the straights

Nice 'n fat bike! Good to hear you're still on it. Detonation should be avoided at all cost so just a smidge bigger mains maybe? I'd leave the turbo as it is. More top end is silly anyway, only looks good on a dyno sheet, the rush of the turbo kicking in is much more important imho. Greetings, Marco.

This was the old aircooled GS from over a decade ago. I never noticed lag, it went like crazy because it had a fairly small turbo and 1166cc motor. It was heavy! Benefits were the fairly easy piping and gravity drain of the turbo. Large plenum meant it was running spot-on right from the start on standard mains and everything. The NewTurboGS is "traditional" turbo-in-front mount. Efi and a larger turbo make for a more controllable bike compared to the old one.

Go Reinhoud go!

Agree with Reinhoud and Gixer1460; I started with a small turbo as this would spool up nice and early. I soon found out I was fighting the bike all the time, espesh coming out of corners, when just running around town with my buddies. Wheelie/wheelspin (and clutchslip!) madness... I've now a TD05-16G (Subaru Impreza) and it complements the nice torquey low-down grunt of the 1195cc EFi motor, starting to build boost at 4500rpm. Pootle around when you want, get big wallops of power when you want.

I've built my first TurboGS back in 2005. As there were no real turbobikes around to compare notes with, I came up with a style that fell in the middle of drawthrough-blowthrough and was inspired by the *cough* Yami turbo design. Turbo under the seat, original headers, relatively easy plumbing. Benefits: Turbo can gravity drain (no pump or oil pickup return mods), no expensive header welding (just a linkpipe), looks brutal (IMHO), clearly audible HISSS from under the seat, proper fast! Downsides: Presumably the exhaust gases can cool down along the way thus reducing power. Solution: Heatwrap. Other than that it could give a little more lag because of the longer header pipes but I couldn't care. Made 210rwhp/216Nm on an 1166cc aircooled motor. Should have kept it *sigh*...

About the carb tops: I had one restricted carbtop that was presumably off a German bike (100hp limit). After removing the caps the offended one showed some kind of studs that the other ones don't have and limit the full stroke

About €750,- for a NA motor like yours, you will need to mod the tank for an OEM in-tank pump, mod some GSXR600 TBs for correct spacing, and configure it yourself. Wether the bike is worth it is up to you. Refurbing the carbs is also a bit costly but much easier to do.

Great vid! "Mikes EFE smokes a bit"

Done an Efi conversion on my turbobike last year with support of Arttu, great guy, conversion is a huge success that I should've done much earlier.

I addition to the info of Mr. Latheboy; I had two pitots for the carbs in 1/4" tubing. My fuelpressure regulator was fitted tot he plenum, as it was on the XJ650Turbo.

Hi El Gringo, Got your PM about the carb setup. Although I've changed to Efi because I got tired of boosted carbs, I'll try to help you. Sorry if I'm asking the obvious, I have no time to read all of the 14 pages. I understand from your message that you have drilled a channel like The Vault has documented for the 41mm GSXR carbs? I never did that on my bike(s). On your bike I'd start off with as standard carbs as they come. Check float heights and that's it to start with. Anyhow, if the engine falls flat on its face right at the point where the turbo starts building boost, then your dynamic boost compensation for the floatbowls is failing. Dynamic boost comp is about the pitot tube(s) that you need to fit into the compressor feed tube that goes to the plenum. If you don't have these fitted, or you haven't got this right, it won't work. When your fuel pressure is too low, it won't fall flat on its face right after boost, but it will gently run out of petrol after a while cuz the floatbowls are running empty.

Stop worrying... fit Efi like I did and never look back