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Sat Jul 18, 2015 11:50 pm

Quote: On my dual cannons I was planning on drilling one side 1/4" and the other side 1/2".

Interestingly enough when I was going through my big box-o-mystery buggy parts I found a single copper hight riser gasket that only had a 1/4" hole in it and another one with the full regular sized opening. My guess is that your idea of asymmetric holes is not a new one and that someone makes a gasket set that way.

In any case, I thought it was a good idea so when I put the riser tubes back on I used those gaskets.

Yes...I didn't relocate one of the risers the way you are "supposed" to. I just couldn't bring myself to start another fab job.

That being said, I'm deep into my warm air intake project building up a centrifugal pan type filter box with a chunk of 3" tubing wrapped around the exhaust pipe and running up to the inlet. Painted the whole thing with ultra high temp paint. Not sure that its all going to get hot enough to cure but what doesn't cure I'm going to wash off and replace with regular high temp paint.

Quote: I have basically the setup you have there with the addition of the heat riser tubes and a warm air pickup tube ( I have an industrial air filter setup and use the dump valve opening on the bottom of it to direct warm air into the canister from off of the cylinders on one side ) . The setup works great with no real signs of causing a problem and I've ran it in everything from single didget to well over 100° with no I'll effects.

Good to hear, I've been a little worried that this system may work too well in warm temps and I'm going to cook my carb or kill performance. I've been trying to figure out an easy way to automatically regulate the hot air intake but haven't figured it out yet. If I could find a regular wax water cooled thermostat valve that opened up at 120º or so I was thinking I could mount it into my filter box so that it popped open and bypassed the hot air intake but I don't think any run that low and the usual 160º seems too hot, although I don't really know what this is going to run. Going to have to stick a thermometer in my filter box when its all running and try and get an idea of what temp my intake is running.

Sun Jul 19, 2015 2:32 pm

I more or less mimicked the stove pipe setup that vw designed minus the little stove pipe piece. Right now I just have to pull the hot air tube away from the cylinders when it gets really hot outside, but much like what your proposing I want to make it self regulating eventually.
so far it hasn't been a problem with getting too hot.

Mon Jul 20, 2015 3:49 pm

Got my warm/hot air intake done. Pretty happy with how it turned out if I do say so myself. I wanted something straight forward and 'clean' looking without having to add any dryer hose or similar since everything is exposed. Only had a chance to test drive it once but it seems that the momentary stumble it used to have on hard acceleration is gone and when I re-tuned my carb I was able to get it running smooth a half turn less than it had been set to.

Mon Jul 20, 2015 8:18 pm

The main downside I see is that you have kinda made a straw for your carb to draw water from a lower point. I would tried to make a heat riser that came from the header to the intake like the factory manifold. Just be careful when crossing streams/ puddles.

Mon Jul 20, 2015 10:15 pm

I doubt he'll have much trouble from the new pipe since it has holes in it up the sides. It won't be able to suck water like a straw as a result. You can verify this by taking a regular straw and putting holes in it and then trying to draw liquid through it. The hole will pull air while the heavier liquid will tend to stay where it's at. If you do this with a very small hole in the straw you may get it to pull some liquid up a bit. However it will take considerably more suction to do so. The holes in his "straw" look to be big enough that I doubt he'll have any issues with it. Unless he submerges the engine to the top of the carb. Then he's probably gonna have more problems to deal with than just a little water in the carb. :wink:

Mon Jul 20, 2015 10:38 pm

GoMopar440 wrote: I doubt he'll have much trouble from the new pipe since it has holes in it up the sides. It won't be able to suck water like a straw as a result.

Yep, that is exactly what the holes are for.

I actually thought about trying to incorporate a snorkel into my system but realistically I'm going to be up to my neck in water before it gets to the top of the carb .

Wed Jul 22, 2015 8:53 pm

You don't necessarily have to be up to your neck, once you get to the other side of the water feature, depending on the angle of the exit, the engine dips down as the front raises. Fortunately your carb is fully enclosed, I had a buddy try to cross a "puddle" that I apparently dared him to go through by saying "I wouldn't do that". All was going well until the wake of water the bug was pushing hit the edge of the hole & splashed back stopping us. The water slinging off the generator belt was directed straight into the clip on air filter while the Archimedes screw crank pulley was pumping the block full of some wonderously fragrant sludge.

Wed Jul 22, 2015 11:03 pm

Quote: The water slinging off the generator belt was directed straight into the clip on air filter while the Archimedes screw crank pulley was pumping the block full of some wonderously fragrant sludge.

Hmm, I forgot about that. I assume there is a way to seal that off? or is it really necessary to pump unfiltered air into your crankcase?

Thu Jul 23, 2015 3:52 am

A "sand seal" crank pulley solves that problem, Some kits just press into the block while others require that the block be machined, try the press in style first, but if there is any wear or corrosion damage on the block, you may need to get the other style.

Thu Jul 23, 2015 10:25 am

TDCTDI wrote: A "sand seal" crank pulley solves that problem, Some kits just press into the block while others require that the block be machined, try the press in style first, but if there is any wear or corrosion damage on the block, you may need to get the other style.

Silicon seal on the OD of the seal carrier will take care of any imperfections in the case in that area. In fact, it should be there if the case is brand new.

Sat Jul 25, 2015 11:23 am

Fellow Montana'er

Awesome build so far, mines no where near as far along as yours, But thoughts are all the same.

Sat Jul 25, 2015 1:49 pm

Tetonrvr wrote: Fellow Montana'er

Awesome build so far, mines no where near as far along as yours, But thoughts are all the same.
OK, I gotta know, a bug out buggy, in Montana? I thought y'all were already far enough out.

Sun Jul 26, 2015 2:54 am

It's all relative, I've had people from Delaware tell me there state isn't at all crowded even though it has more people than my entire state in an area the size of my county,

But to me my county is the second most populous in Montana with 120,000 people living in only 25,000 square miles so there is always somewhere further out to go.

Took the buggy out today and spent an hour bouncing arround a clear cut on a hillside. Lots of fun except my intermittent gremlin came back, engine kept acting like it was out of gas stalling any time I tried to give it partial throttle even though it would idle fine and accelerate fine if I stomped on the gas. Limped home, checked everything, as usual, found nothing.

I did notice that the fule filter seemed mostly full of air that wouldn't seem to clear out. My gas tank only had a couple inches in it and at that level my filter is just above the level of fuel. The pump is a couple inches lower but the way my fuel line is routed it comes up to the filter first before going down to the pump. I have a theory that maybe when on extreme slopes or bumps with a low fuel tank that air gets sucked into the fuel line and ends up stuck in this high spot and the fuel filter can't get enough suction to clear it since the syphon is lost and ends up just pulling a little trickle past the bubble. Not sure if there is anything to it but I re did my fuel line anyway so that there are no high spots between the tank and the pump. Fuel filter still looks mostly full of air rather than gas but after the change the engine ran great again. I've had this happen before and also had it go away after cracking open the fuel line at the filter, possibly purging a bubble? I dunno. I though I had this problem licked about three other times too. Letting the buggy sit overnight will temporarily fix it, as will cracking the fuel line open or taking apart the carb but it always seems to come back eventually. For all I know it's not even a fuel problem but that is what it feels like at least.

As for sand seal pullys is there any easy way to tell if you have one already? I have a aluminum pulley with degree markings and externally it looks just like the sand seal pulley kits I see for sal online if that means anything.

Sun Jul 26, 2015 6:51 pm

I got a migraine last night, for which the only effective solution I have found is caffeine so I ended up staying up all night and in my ramblings on the internet I found this article on Air Lock

https://en.wikipedia.org/wiki/Air_lock

Which made me sit up and take notice since that picture is pretty much how my fuel line looked with the filter at H1 and the pump at H2

Sun Jul 26, 2015 7:57 pm

& bouncing around could agitate the fuel enough to introduce air bubbles into the system. Electric pump might solve that.

Sun Jul 26, 2015 8:56 pm

I do have an electric pump but I understand that these pumps are pushers rather than pullers and would have a hard time sucking liquid past an airlock type situation. They would pull the liquid out until they started sucking air and then would lose sucking and not be able to pull enough air out to clear the bubble and rather just end up pumping the small amount of fluid that leaks past the air bubble.

But that is just a theory.

If this happens to me again I think I am just going to temporarily replace my fuel line with transparent vinyl tubing so I can see exactly what is happening.

Sun Jul 26, 2015 9:12 pm

Aerindel wrote: Took the buggy out today and spent an hour bouncing arround a clear cut on a hillside.

I'll be getting my rail running again pretty soon and I'll need to do some shake down cruises to work out some of the remaining bugs. Maybe I need to drag it up there towards Missoula so I'll have someone to putt around with in case I need a hand with it. At least that's what I'm thinking of telling my wife. LOL

Sun Jul 26, 2015 9:20 pm

That would be fun.

Sun Jul 26, 2015 9:40 pm

How about the fuel cap, if it's sealing completely it may be causing a vacuum.

Sun Jul 26, 2015 10:24 pm

Quote: How about the fuel cap, if it's sealing completely it may be causing a vacuum.

Someone suggested that a while ago so this time I took the cap off for a little while and there was no change, also removed the air cleaner in case that was the issue.