What did y'all do with the hose that used to run from the engine to the airbox?
Straw for beer? :laugh:
adding to the thed, what jet sizes are people using with a lunchbox and aftermarket exhaust?
yeah what is that hose for anyway.. i just let mine hang
Quote from: EDub on April 02, 2006, 10:24:40 PM
yeah what is that hose for anyway.. i just let mine hang
Blowby. It improves emissions by recirculating exhaust gases that leak past the valves and rings back into the combustion chamber instead of into the atmosphere. Letting it hang is actually what was done back in the day. If possible, let it hang where the airbox drain was. It's not a good idea to have exhaust blowing on steel since it's corrosive.
Put a breather filter on it, ala hot rod v8. Works great.
I put a pcv valve on it and ran the hose to dump behind the rear tire.
Quote from: aplitz on April 02, 2006, 11:55:37 PM
Put a breather filter on it, ala hot rod v8. Works great.
What does that do?
wx
Quote from: AlphaFire X5 on April 03, 2006, 08:32:32 AM
Quote from: aplitz on April 02, 2006, 11:55:37 PM
Put a breather filter on it, ala hot rod v8. Works great.
What does that do?
There are times when there could be a vacuum in the crankcase, and you don't want debris being sucked in there now do you!
A better thing to do would be to route it through a small catch can and pcv valve back to the vacuum port on the carbs. This will help minimize oil leaks as there will always be a vacuum in the crank case preventing oil from being blown past all the various seals.
Quote from: AlphaFire X5 on April 03, 2006, 08:32:32 AM
Quote from: aplitz on April 02, 2006, 11:55:37 PM
Put a breather filter on it, ala hot rod v8. Works great.
What does that do?
PVC valve, installed in the correct direction, lets blow-by out of the crankcase and does not allow it to suck in air as the pistons rise and fall - in theory there is a slight increase in ower and reduction in oil consumption by keeping the crankcase under a slight negative pressure - doubt that you would ever see that power on a dyno. Installing the PVC backwards is a no-no.
Installing the PVC backwards is a no-no.
Then would it be a NCV (negative crankcase ventilation)?? :)
PCV valve backwards would make your engine bleed out oil like it were out of some horror movie
so uh... how about those jet sizes?
Quote from: budget speed demon on April 03, 2006, 03:17:39 PM
so uh... how about those jet sizes?
No idea. Mine's an '04 so it's different than yours. I'm running 20/62.5/135 right now. Since I'm the only anal one about bad jetting, you might have to go with the "reccomended" crap. :icon_razz:
BSD: I'm running 40 pilot and 150 main with a 1mm washer under the stock needles. Basically per the jetting matrix. I think that it's about as good as I can get it without a gas analyzer. (Maybe later this year.) :)
(http://img.photobucket.com/albums/v11/horteniv/Plugs.jpg)
BTW: K&N lunchbox and V&H full system.
Alpha: That's the crankcase vent hose as you've no doubt figured out by now! It's necessary to vent the crankcase to the atmosphere to prevent a pressure build-up within the engine. I once saw an TSIO-540 that had a mud dauber nest in the crankcase vent. It managed to dump 8 quarts of oil an hour past the crankshaft seal. The operator was convinced he was lucky to be alive with oil all over the windshied, but I didn't tell him he had another 4 quarts to go. :laugh:
Install a filter on the end of it to keep the bugs out and be done with it. PCV is another EPA thing. The only engines that NEED PCV are large Diesels. Do a google on "crankcase explosion" if you want to see some nasty pictures. Oil vapor buildup in the crankcase + ignition source = big mess.
what size of PCV valve is used in this case? is there anything specific I should ask for at the parts counter?
the pcv valve i used is for a '88 2.2 dodge shadow turbo im not sure what the size is tomorrow im going to work on my bike so ill take a peek at what size and the length i used.
Cool thanks.
My bike has been in storage all winter, and I'm gonna go and get her ready for the season soon. I've ordered a Srinath flange and a Wileyco can, and a K&N lunchbox, and I'm gonna do a rejet as well. I had totally forgot about that hose, and until just now, had no idea what it was for!
Oh and I've never really looked at a PCV before... they're obviously flow specific... are they marked on the valve? anyone got any tips/pics please?
white on the plugs= lean right?
btw, how does it run with those jet settings? any hesitation?
No hesitation at all when I wrang it's neck on Saturday. I haven't had a chance to ride it very much, but I think the setting is very close to correct. I may drop a second washer under the needles out of sheer curiosity.
As a general rule, light to medium tan plugs indicate proper mixture. The color will vary due to additives, heat range, and other variables. Alcohol will tend to lighten the deposits, and I think it's part of the reason why those plugs are such a light shade of tan. Realize that spark plug reading isn't an exact science, and that power output, EGT, or exhaust gas analysis is far more reliable.
As a sidenote, the bike previously had dynojet drop-in needles at groove #3. It would flood on choke, the plugs were dark black, it was impossible to start cold, and engine speed would drop like a rock when you let off the throttle.
Oh man you are wonderful! I now have a starting point.
And just out of curiosity, do you think you'll get around to trying out that second washer any time soon? If not let me know and when I do my rejeting I'll try it out and let you know what happens.
Probably not, even though it only takes a couple minutes to switch washers. I have to put the bike in storage so I can leave next week, and I probably won't be back until fall. :cry:
Those settings will get you into the ballpark. After that it's just setting the idle mixture and fiddling with the needle to get the slope of the mixture curve correct. Don't be afraid to fiddle with those settings if you need to, as no two sets of carburetors meter exactly alike. Just be sure that whatever you do to one you do to the other. :cheers: