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Post by Johansson on Jul 24, 2011 14:25:03 GMT -5
If it is possible I would like to route the exhaust out between the rear tyre and the seat, but most likely I will need that space for the fuel tank so I guess I will have to make one port to each side. Preferably so that my legs won´t catch fire.
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Post by racket on Jul 24, 2011 16:59:44 GMT -5
Hi Anders
Thankfully you won't need lots of leaning clearances , so you can have the exhaust pretty close to the road surface , our large volume exhaust systems are a problem :-(
Cheers John
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Post by Richard OConnell on Jul 24, 2011 20:44:10 GMT -5
isn't there a potential for damaging the rear tire if gasses are vented directly onto it? They should be getting pretty hot from the road friction alone...
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wolfdragon
Senior Member
Joined: April 2011
Posts: 287
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Post by wolfdragon on Jul 24, 2011 21:02:05 GMT -5
looks like Anders needs to invest in some fiberglass pants...
and possibly a not so creepy way of asking the ladies to scratch his legs...
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Post by Johansson on Jul 24, 2011 22:57:21 GMT -5
One thing I have to keep in mind is that according to the SCTA rules the exhaust mustn´t be pointing towards the ground, this rule is made to avoid damage to the salt track. The best angle for the exhaust is slightly up and rearwards, that way it might lift some skirts if I am driving by a crowd. If I make the engine compact enough I will have room to move it around a bit until I find a spot where the exhausts clear my legs, so some sort of seat will have to be made so I can test the driving position and see where I want to have the legs.
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Post by Johansson on Jul 26, 2011 15:40:15 GMT -5
I got a complete rear axle with the mail today, made some progress on the rear part of the frame jig and rigged some kind of seat to try to find a decent riding position. Once the handlebars bought on Ebay arrives I can give the riding position more thought, could hardly keep myself from falling over without anything to hold on to... Cheers!
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Post by Johansson on Jul 29, 2011 16:25:47 GMT -5
I made all the oil lines in and out of the engine today, I have bought a new 100 litre workshop compressor capable of 10bar and will use it to spool the engine up with full oil pressure. If it works I won´t have to overhaul the scuba compressor, the time it takes to fill the tank is also greatly reduced with the 10 bar compressor so I hope it proves to be enough. Here is a pic of the oil return plenum, it is needed to connect the two outlets to the single oil return pump. A high flow/high pressure oil filter that I bought along with the other stuff today. Cheers!
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Post by racket on Jul 29, 2011 17:17:56 GMT -5
Hi Anders
Nice oil lines :-)
Is that teflon tape on the oil filter fittings ?? ...........................I've always been worried about using that after having "problems" from stray bits getting into places I didn't want it to get into .......................so now only use Loctite Hydraulic Sealant on threads so there can't be any "solid" bits getting into small lube ways . .....................I get paranoid about lube problems and have to flush the circuit religiously before hooking up to the engine , even then I'm still worrying about the lube until several test runs have been completed without problems .................all those FM-1 bearing problems have left me very cautious about lube systems .
One thing with your scavange pump , the oil coming out is pretty hot , you might find that it will soften the plastic tubing to the point where the suction will collapse the tubing sealing off the scavanging , it might pay to keep a close watch on the tubing condition , a lot will depend on how much bypass air is mixed with the lube and whether the air will keep the suction at a level where the tubing isn't collapsed . ..................lotsa unknowns with a new engine on its first spoolup ....................exciting times ahead for you :-)
Cheers John
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Post by ernie wrenn on Jul 29, 2011 19:39:45 GMT -5
NEVER.....NEVER......EVER... Use teflon tape on ANY critical fitting. Use 3M or Rectal Sealent Gray. I cannot tell you how much of that crap I have removed from nitrous solenoids, usually AFTER the racers engine exploded! The tape cuts into tiney sllivers and work their way down the threads. If the fitting is removed and reinstall the tape remaining in the female threads will get pushed into the system. I have NO idea what a good use is for the tape but it keeps me busy rebuilding clogged equipment. I have had to flush a complete nitrous system including cleaning the spray bars in the plate and jets. Ernie COMPUCAR NITROUS SYS www.compucarnitrous.com
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Post by turbochris on Jul 29, 2011 20:06:12 GMT -5
That's what I like, the loctite hydraulic stuff that's antifouling.
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Post by racket on Jul 30, 2011 0:59:45 GMT -5
Hi Chris
LOL........I even use it as a low strength thread lock on parts that don't have fluids :-)
Cheers John
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Post by Johansson on Jul 30, 2011 1:03:12 GMT -5
Point taken guys, I´ll get rid of the teflon tape right away and get some Locktite sealant. Thanks for the advice! John, the see through hose is just for this cold test so I can see how much air the scavange pump manages to pull through the shaft seals, when the engine is ready for a live test I will exchange it for an AN8 steel braided hose.
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Post by racket on Jul 30, 2011 3:33:39 GMT -5
Hi Anders
Plastic hose is good for viewing how systems are working , I wanted to use some on the GT6041 drain but couldn't find any 1.125" ID , it was either 1" or 1.25 " :-( .....................when I made up the 10/98 test stand setup I was able to use plastic tubing to check what was dumping out of the lube drain , its was a great help :-)
The Loctite hydraulic sealant works great , been using it ever since I started playing with turbines , I needed it for the high pressure fuel system fittings on the bike , no problems handling >1,000 psi and never any stray bits of sealer to get into places they shouldn't .
Its a bit expensive , but it lasts a long time as you only need a little at a time , took me nearly 20 years to go through my first container full , purchased a replacement last year :-)
Cheers John
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Post by Johansson on Jul 30, 2011 23:48:25 GMT -5
I removed the teflon tape yesterday and got a bottle of Locktite hydraulic sealant, much easier to use as well so that was one good purchase. I also modified the oil filter holder to allow the oil pressure pickup to be fitted to it, this way I won´t have to get a T-piece for the steel braided oil line. After that I finished hooking the engine up with the oil lines, the air impingement line and the wiring, so I only have to find a suitable oil tank to have the engine ready for a test! Cheers!
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Post by racket on Jul 31, 2011 0:07:22 GMT -5
Hi Anders
Nice and neat solution .........................LOL, it doesn't matter how many times we make something there always seems to be a better way of doing things , there must be at least a dozen things on the kart that I could change already :-(
Can't wait to hear about the fire spoolup :-)
Cheers John
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