To those with lunchbox/pod filters

Alphamazing · April 02, 2006, 08:19:04 PM

What did y'all do with the hose that used to run from the engine to the airbox?

Destro · April 02, 2006, 08:32:13 PM

Straw for beer?

budget speed demon · April 02, 2006, 08:43:53 PM

adding to the thed, what jet sizes are people using with a lunchbox and aftermarket exhaust?

EDub · April 02, 2006, 10:24:40 PM

yeah what is that hose for anyway.. i just let mine hang

Egaeus · April 02, 2006, 10:30:38 PM

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.

aplitz · April 02, 2006, 11:55:37 PM

Put a breather filter on it, ala hot rod v8. Works great.

Cusimano · April 03, 2006, 08:17:55 AM

I put a pcv valve on it and ran the hose to dump behind the rear tire.

Alphamazing · 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?

Wrecent_Wryder · April 03, 2006, 09:05:39 AM

wx

LimaXray · April 03, 2006, 10:47:34 AM

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.

mjm · April 03, 2006, 11:10:55 AM

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.

Chuck · April 03, 2006, 01:10:52 PM

Installing the PVC backwards is a no-no.

Then would it be a NCV (negative crankcase ventilation)??

LimaXray · April 03, 2006, 01:18:29 PM

PCV valve backwards would make your engine bleed out oil like it were out of some horror movie

budget speed demon · April 03, 2006, 03:17:39 PM

so uh... how about those jet sizes?

Alphamazing · April 03, 2006, 06:20:33 PM

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.

GeeP · April 03, 2006, 07:07:39 PM

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.)

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.

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.

joedude · April 03, 2006, 07:14:11 PM

what size of PCV valve is used in this case? is there anything specific I should ask for at the parts counter?

Cusimano · April 03, 2006, 07:20:24 PM

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.

joedude · April 03, 2006, 07:34:57 PM

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?

budget speed demon · April 03, 2006, 08:48:52 PM

white on the plugs= lean right?

btw, how does it run with those jet settings? any hesitation?

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To those with lunchbox/pod filters