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  #91  
Old 06-01-2013, 10:13 PM
PerfTech's Avatar
PerfTech PerfTech is offline
 
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Quote:
Originally Posted by jchang10 View Post
I got my vacuum valve with clamps (thank you Allan), and i assumed it would be an easy install. Murphy strikes again!

Unfortunately, it turns out there is precious little straight runs in the exhaust system on the -10. I am still unsure of exactly where i can mount it appropriately.

It looks like most -10 welded installs put it right on the curvy part of the tubing, which won't clamp well with the clamp system.

There is a chance it will fit on the only straight section right underneath the firewall but the clearances are tight. Also, it will make removing the hinge pin difficult.

Argh!
,
....If you can take some photos and tell us what you need we will make you a custom part to solve the problem. very sorry to hear you ran into this. Allan...
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  #92  
Old 06-01-2013, 11:51 PM
jchang10 jchang10 is offline
 
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Hi Allan... it's certainly not your fault! you delivered exactly as promised. i was so excited about not having to farm out for the welding job, that i hadn't even considered any other possibility other than this would be a cinch.

I'd be more than happy to take some photos, but it may take a few days. I did find this link below to Ernst's post that shows the -10 exhaust. You can see how it curves straight out of the heat muff.

http://www.vansairforce.com/communit...8&postcount=51

It might be possible to fit the clamp right in Ernst's same location with a smaller clamping plate, possibly.

I didnt have much time to study it today. Unfortunately, it might take me a few days to get time to look at it again.

I hope someone else may have a suggestion as well. Thanks again for all the help and great products!

Jae
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  #93  
Old 06-02-2013, 10:13 AM
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CharlieWaffles CharlieWaffles is offline
 
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Here are some pictures of my welded on one, as well as shots showing how little straight tubing there is for a saddle like this.

http://myrv10factory.wordpress.com/2...valve-welding/
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  #94  
Old 06-02-2013, 10:32 AM
N427EF N427EF is offline
 
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Jae,

you may consider a location up near the header, there are straight sections
on both sides.
According to Dan Horton, this area of the exhaust is more efficient but
it is almost uphill from the exit of the separator.
There is simply no straight section downstream from the mufflers that can accept a saddle fitting.
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  #95  
Old 06-06-2013, 11:05 PM
jchang10 jchang10 is offline
 
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I didn't find much room upstream the muff either. The pipe runs are fairly tight there, too.

I finally got around to it and got it mounted. I ended up mounting it to the side where the clamping plate fit without modification. I thought i would need to trim some of it but never did.

No test flight yet, since I have to wait for Obama to leave tomorrow!



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  #96  
Old 06-07-2013, 06:13 AM
N427EF N427EF is offline
 
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Default Nice job

That looks nice and seems to fit perfectly.
Mine is welded in place right there and works great.

Sorry you are locked in by the Presidential TFR,
great timing for Golden West.
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  #97  
Old 06-07-2013, 06:28 AM
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ColoRv ColoRv is offline
 
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I have a question. While I love the idea of removing air pressure from the case, what happens when the valve stops working? If it fails open, no problem....but if it fails closed...wouldn't it blow out a seal on the engine? Couldn't that get rather interesting in flight if it blows oil all over the place?

Are we expecting a moving part with baked oil on it to never stick?
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  #98  
Old 06-07-2013, 09:03 AM
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PerfTech PerfTech is offline
 
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Quote:
Originally Posted by ColoRv View Post
I have a question. While I love the idea of removing air pressure from the case, what happens when the valve stops working? If it fails open, no problem....but if it fails closed...wouldn't it blow out a seal on the engine? Couldn't that get rather interesting in flight if it blows oil all over the place?

Are we expecting a moving part with baked oil on it to never stick?
.....I addressed this it another thread and you need not be concerned. The valve is a reed valve and the only kind of failure it can have is wide open if the reed were to break the only consequence would be a loss of the gained performance improvement. We have been using and selling these systems from 1969 to date (many thousands) and I can't remember ever seeing a failure or a bad valve. Hope this puts your mind at ease. Thanks, Allan...
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Last edited by PerfTech : 06-07-2013 at 09:07 AM.
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