Guest Anonymous Posted October 17, 2001 Share Posted October 17, 2001 Here are the photo's Scotty sent me of his Turbo HD sled, very cool. I'm anxious to hear how it runs. Regards, Lone Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 17, 2001 Share Posted October 17, 2001 Thanks lone that was quick!I didn't get a chance to drive it last night i wasn't feeling good so i just snapped some pics and sent them to you.Guys don't mind the flex tube to the carb it's getting changed soon i just wanted to see if it would work before i spent the money on a custom pipe.When i had it running it seemed to have alot more power.But i'll see soon enough when i take it for a ride around the yard on the grass.Oh ya it needs to be cleaned so don't mind the crap on it i just got it out from storage about a week ago.When it's all done i'll see if lone will post some better ones.This is a total sleeper no one would expect a turbo on a sled especially one this old. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted October 17, 2001 Share Posted October 17, 2001 Ouch - I see there is no wastegate control hose - what does that sucker boost?? What a screamer - hang on tight! Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 17, 2001 Share Posted October 17, 2001 Hey sleeper it doesn't have one cuz it only boosts 5 psi right now if it gets higher then i'll hook it up.I'm hoping for at least hitting 60 again since i changed motors it will only go 50 maybe 55 with the wind behind me and going down hill.I think i have clutch problems Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 17, 2001 Share Posted October 17, 2001 Scotty, no problem, send the pictures to me when you take them and I'll post. That is a cool project. Regards, Lone Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 17, 2001 Share Posted October 17, 2001 the test will be tonight when it goes for it's first ride around the yard.Hopefully i don't tear up the grass my g-friend's mom will kill me if i mess it up Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 18, 2001 Share Posted October 18, 2001 well bad news there isn't any snow But i did take it for a ride and the tilliston carb can't pump gas when it's under boost.Anyone have an idea on what i can do?I was thinking about a new carb(used)and maybe a fuel pump what do you think? Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted October 18, 2001 Share Posted October 18, 2001 Shouldn't need a new carb. What's occuring is the gas is being pumped back down the line under boost. The fuel pressure needs to be pressure refrenced so that as boost rises the fuel pressure will go up at the same rate. This occurs on automotive carbs too. Mechanical fuel pump right? It can be done with those by drillingtapping into the pump but I'm honestly not sure how it's done or how it's done on a snowmobile Check around on the 'net and you should find information on how it's done for cars or maybe bikes which should be a clue. Oh, carb have floats? Make sure they're strong as they could also collapse under the boost. Even a few lbs of boost could put a surprising amount of pressure on the float. Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 18, 2001 Share Posted October 18, 2001 Thanks blk but the carb is a tilloston and it has an internal pump in the carb and it requires the pulsation of the engine when it sucks and blows on the engine's normal cycle.I'm just wondering if it's just getting blow instead of both?I'm checking some sites and hope to find an answer soon.I even thought of a fuel injection system. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 18, 2001 Share Posted October 18, 2001 Scotty, I'd check with some of the bike turbo places (do a search under like motorcycle turbo) or something to that effect. There are loads of bike carbs to be had, some slide type, some CV carbs like the Harleys (and some Honda's) use. (which I'm not sure will work, but on the other hand isn't that sorta what a SU is?). Probably know all that, but thought I'd tell ya just in case. How about a carb box? Perhaps if all the vents and such are under pressure as well it'll work? It would require enclosing the carb in a box and sealing where the linkage goes in ala Studebaker. Just some ideas. Regards, Lone Quote Link to comment Share on other sites More sharing options...
DavyZ Posted October 18, 2001 Share Posted October 18, 2001 Wicked idea for a sled--ditto the "hang on tight!" comments. Davy Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 18, 2001 Share Posted October 18, 2001 Thanks for the ideas i checked for some sites on turbo sleds but seem to find none i'll have to try the bike sites.The carb is not like a su it's just a plain carb nothing special but i think i will go with a mikuni carb and fuel pump.This is going to get expensive quick i can see it now i just hope the results are worth it. Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted October 18, 2001 Share Posted October 18, 2001 Hrm, presurrize the gas tank perhaps? Use a check valve so it doesn't suck in raw gas hrm, not sure you'd be able to work that out.... Pressurizing the entire carb might do it but I'd be afraid it would just push the gas right back into the tank.. Oh well, sell the turbo to Ron for his golf cart Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 19, 2001 Share Posted October 19, 2001 I think i'll get a motorcycle carb and a fuel pump.I was thinking about it today while i was working and figured it wouldn't be that expensive to do it that way.It will be fun as soon as the snow hits but til then it's a great time to work out the bugs. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 19, 2001 Share Posted October 19, 2001 Ahh, it'll be fun, it'll winter, you'll be bored. It won't cost ya that much.. Seriously though, if its a motorcycle carb, look for a bike dismantler, save ya at least 50-75%, alot of times particularly on bikes the stuff is real low mileage (except for forks, those are tough to find as most of them have the distinctive oscar meyer weiner look to them hence the reason they're in a dismantler ). Regards, Lone Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 19, 2001 Share Posted October 19, 2001 Put a slick on it .They r availible you know!Then put a electromotive unit on it. There is a turbo elecvtromotive sled at the shop 275 ft lbs ! Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted October 28, 2001 Share Posted October 28, 2001 Well another update i took some advice and pressurized the carb in the "Bowl" of the carb.It doesn't have a real bowl so i used the fuel return line and it acually worked But... yes there is always a but the return line is just actually just putting gas in the turbo and when it spools up it will push in extra gas but i do think it is pushing the gas thru the carb too.I found out my crappy intake pipe from the turbo to carb isn't too air tight it leaks alot.When it gets flooded it will fill the turbo up with fuel and then when i started it it pushed that big load of fuel up the pipe and i saw it leaking out everywhere So the next thing is a mikuni carb i think unless i can rack my brain for another idea to use the stock carb.One good thing is the fuel has oil in it and it helps oil the turbo but.... yes another but it is very hard to tune cuz the jets in the carb are set one way and all the extra fuel from the return line is pushed into it too so either i can have good low end or good high end no happy medium.But it does run and stay running and does have more power and sounds sweet when i let off the throttle with that psshhhhh sound. Well that's my update for now i think i'll keep on it to try to get a working turbo sled.I lose ambition after a while then i get into it and it gets me excited again and i'm into it again.I have a question too do you guys think that a check valve would work in the return line?I could use it to keep the fuel out but it would let the pressure in what do you think? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 28, 2001 Share Posted October 28, 2001 Might work ok, maybe like a rollover valve in a fuel cell on a T off that return line (or a check valve more appropriate). *shrug* Regards, Lone Quote Link to comment Share on other sites More sharing options...
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