neonphil
Expert
I am posting this for Snow Fever
This is the New gauge I'm installing on my sled in case the Turbo thing doesn't pan out...........
This is the New gauge I'm installing on my sled in case the Turbo thing doesn't pan out...........
SF,
Where are you at with your slide spring experiment?
Where are you at with your slide spring experiment?
Snow fever, What would happen if you put a hose from the airbox to someplace beneath the diaphram that lifts the slides therefore using boost pressure to lift the slides rather then vaccum to pull the slides up,I havnt looked at mine but there must be room on that diaphram housing to drill and install a nipple ,maybe im way off but it makes sence to me?You would have to vent the topside of the diaphram to allow air back and forth.Vcrash
Snow Fever
Expert
Well I hate to say it but the spring theory worked alot better on paper then in real life. I cut the springs down untill the carbs worked fine without the air box, but when I hook the turbo back up it craps out around the 7000 rpm range. So I tried removing all the springs from the slides again because thats as soft as you can go but it still won't rev past 7000 without crapping. We then figured that it must be the placement of my vacum lines for the slides. (the big ones at the back of the carbs) I had them hooked to the charge tube and we figured that they must be pulling a vacum untill the Turbo built enough boost so we move those lines down to the air box where the small vacum lines for the float bowls were. Still craps at the same rpm. We tried about 20 diffrent combinations to no avail but we have a new theory. Maybe the air box is TOO SMALL? Corky Bell the Turbo Gurru said for altimate throttle response make the air box 1.2 times larger in volume then the CCs of the motor. Motor is 1000cc my air box is 1225cc. The only variable is those damn CV carbs. Maybe that principle doesn't work with these type of carbs? Anyways I have some more things to try and if you guys have any suggestions let me know. Vcrash, those big vacum tubes on the back of the carbs do just what you are explaining but thanks for the input. I'm sure its something simple I'm just over looking or maybe it is just that the air box is too small for CV carbs to react to? Good thing its just Sept. so I still have some time to deal with my issues. Oh well its good to have a puzzle to work on when your old so your brain doesn't get rusty.
black john
TY 4 Stroke Guru
carb,s
it,s all in the petio tubes
it,s all in the petio tubes
black john
TY 4 Stroke Guru
carbs
i forgot check and see what yamaha did to there carbs on the seca 650 turbo maybe theres somthing there that could help you out ? :idea:
i forgot check and see what yamaha did to there carbs on the seca 650 turbo maybe theres somthing there that could help you out ? :idea:
Snow Fever
Expert
Black John, your right and I have started on the fix and thanks to some of the guys on here for there help I will get it right sooner or later. I've been painting my buddies hood and trailing arms on his RMK this week so I havn't had time to work on mine but the changes are almost finished. I set my stuff aside to do the painting because I thought adding weight to his sled was a good thing HA HA I tried to convince him to put on 20 coats of paint and clear to get that real deep look but really I just wanted to add 20lbs to his sled. I have to go over this morning and put the last color on and then it's done so I can get back to my junk. Thanks to all you guys that called or wrote me with suggestions.
neonphil
Expert
I am posting this for Snow Fever
This is why I haven't been working on my sled, trying to add weight to my buddies RMK to slow him down. I just finished painting his hood trailing arms and rear bumper and it came out pretty good. Not bad for NO lessons anyway.
This is why I haven't been working on my sled, trying to add weight to my buddies RMK to slow him down. I just finished painting his hood trailing arms and rear bumper and it came out pretty good. Not bad for NO lessons anyway.
neonphil
Expert
Excellent job!!!
1xr
Expert
The hood looks good. Did you put the decals on first and then cleared over. I just spent hours and hours painting and then wet sanding and buffing my hood and gas tank cover. I did'nt clear over the decals. The dam red on the decals does'nt match any way. Well thats what I get for upsetting it on the road a couple weeks ago. I don't feel so bad now that the finish is alot better than yamaha's enamel paint.
Snow Fever
Expert
Actually there are no decals on here. I free hand masked it all and painted each color. It really looks alot better in real life, its VERY shinny, looks like glass. Used a Urathane automotive paint. Took damn near as long to take off all the masking as it did to put it all on. My backs killing me so now I have to rest awhile before going back to my Turbo. Hopefully tomorrow start work on it again.
Snow Fever
Expert
I fixed it!!!!!!!!!!!! Motor HAPPY now. I put the pitot tube for the float bowls up close to the bend in my charge tube just before it hooks to the Turbo. Motor screams like a Banshee to 10,000 + with a short stroke of the throttle. I'll take it out on the grass this weekend and see if its still happy. My dealer has one of those exhaust meter things that you stick in the exit end of the pipes so I'll wip it down there and see how far off it is in the jetting. Now I can get revved up about working on it again instead of scratching my head. :lol:
Scott F
Newbie
- Joined
- Oct 10, 2003
- Messages
- 9
Snow Fever, thanks for the very cool thread. It's been a month now since your last post. Have you tested it yet? Or are you waiting for snow to fly?
A note about the CV springs. If you cut coils out of the spring, you will reduce the preload, but the spring rate will go up. If anyone wants to try a selection of springs, this company has a bazillion springs:
http://www.centuryspring.com/home.htm
Their catalog is unbelievable. All you have to do is dimension the stock springs, measure the spring rate, then browse the catalog for likely candidates.
A note about the CV springs. If you cut coils out of the spring, you will reduce the preload, but the spring rate will go up. If anyone wants to try a selection of springs, this company has a bazillion springs:
http://www.centuryspring.com/home.htm
Their catalog is unbelievable. All you have to do is dimension the stock springs, measure the spring rate, then browse the catalog for likely candidates.
Snow Fever
Expert
Scott, I started a new thread, "Do it yourself Tubo Part 2(Testing)" and Yes I have put 14 miles on the grass and its working good. I'm just finishing up all the little details now should be on its feet this next week and then just need to add SNOW.
