Turbobike Web Site www.Turborick.com
Rick, being that i'm still trying to get my 1983 Suzuki GS550E running, this is a bit premature, but i was wondering if anyone has ever turbocharged a GS550 of any sorts? i've heard from my friend that they are really reliable stock, but i've had my 3rd gear (6th driven) loose it's dawgs, and the same happened to another friend of mine. the reason i ask is that i've built several turbo CBR600F2's in the past for our Formula SAE team that were fuel injected and turbocharged, intercooler and yes, RESTRICTED! due to those damned FSAE rules. oh well, we were still i believe to be one of the three fastest cars at competition last year even though i ran my program from 1997 due to several dyno grenades and a lack of testing. we managed to make around 95hp corrected w/ about 7psi, no intercooler, and the stock astronomical compression ratio of 11.6 to one. one school last year made 92hp to the rear wheels. i believe it was UW madison with a turbocharged, and I'm betting intercooled F3, i think. that's 102.2 if you use the 10% formula for finding crankshaft or more typically engine hp after adding the 10% loss through the tire and chain. the most we've ever made is 95hp corrected in 1992 with a fast by ferraci ninja 600, an intercooler, and a warner-ishi RHB5 turbo with a compressor impeller that was designed for a 1.0 liter car engine. i think we made the same in 1997 with our F2, and we never got a complete dyno run in 1998 with our new F3 (new to us, anyways, w/ a ported head, a first for us) and new Garrett GT15VNT w/o a normal wastegate. instead, it used variable turibine vanes to control the boost. very trick, but also very heavy. i would have liked to strap our car to the dynojet at competition, but the line was like 3 hours long and we wanted beer and food badly, especially those not on engine team. keep in mind, this is through a SINGLE 20mm restrictor, not 4 36mm mikunis. i don't want to venture a guess as to how much power we could make unrestricted, but i'd really like to find out this summer. run like 20psi with a BIG intercooler. i'm guessing close to 200hp corrected at the output shaft. what do you think? also, if you want one of my dyno graphs from 1997, let me know. we made like 52 ft-lbs of torque in 1997, and probobally more last year. we also made 40+ from 4500-11,500rpm. nice ayer's rock powerband that's easy to drive on an autocross course. also, what compression ratio do you reccomend for 100 octane race gas, a 600cc motor with essentially no redline but slightly weak rods (the nemesis of the F2), and around 10psi of boost max.? i'm guessing around 10 to 1 to keep the the thermal efficicency up as high as possible, but i'm not sure. soundls like you have more experience with playing with the compression ratio than we do. i've done engine work the past two years, and been on the Formula SAE team for the past four, but i still have yet to break the magic 100hp barrier. please let me know what you think about a turbo Suzuki GS550E, max hp on an unrestricted F2, and the best turbocharged compression ratio. thanks. also, my crank is presently severly frozen in the bottom end of my motor. i think i dropped a bearing when i put the engine back together while waiting for the gear, and the bearing fell between the crank and another bearing, but i don't know. i've put 100ft-lbs on the end of the crank to no avail. the cams move and are fine, but i'd have to break the cam chain to split the case and look inside. any ideas/suggestions? later, Dave Schumpert '95-'98 VT Motorsports '73 914 2.0 '83 Suzuki GS550E