My spool valve build!

r-rated diesel

r-rated diesel

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Oct 6, 2011
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Here is my spool valve that me and my buddy built. What do yall think??
 

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I like it. I've been planning something similar. I'm gonna make a test mule out of mild steel and then get one of my buddys to mill the final version out in inconel 625.

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Is there an alernative to welding the block off plate to the valve? Seems like a headache to dissasemble/replace later. Looks good though!!
 
Do you have a break down of where you sourced the individual parts and the cost?
 
Thanks guys! I decided to weld it on because I didn't wanna have to worry about anything workin loose and goin thru my turbo. The only thing I would ever need to change would be the actuator anyways and it unboltes.
 
I like it! Alot cleaner than mine. Is the flange stainless also? How thick?
 
Looks nice. I ran one similar from Sound Performance. I like the compact size, mine didn't like the heat though.
 
Oh wow I figure it'd cause more lag by blocking half it up. Probably wouldn't work too well on a daily driver... Would it?
 
6.9poweredscout said:
Oh wow I figure it'd cause more lag by blocking half it up. Probably wouldn't work too well on a daily driver... Would it?
Click to expand...

It works very well for a daily driver. Search for it on here and Google and see for yourself.

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Sounds good. Just absorbing some knowledge. Don't think I'll need one on my 466 but nice to know the option is there.
 
I had one of the second generation valves designed by Weston. the divider piece broke right out and went through my turbo.( as has happened to a few people)

his newest design has an inconel insert to take the heat.
 
Is $660 the current going rate for these, or does someone make a nicer one than the one listed. Also does anyone know if BD's is carbon steel or inconell?
 
ahale2772 said:
the divider piece broke right out and went through my turbo.( as has happened to a few people).
Click to expand...

I am currently looking into whether the divider of yours failed from erosion, this is most likely the case. Max is the only other person to have this issue, his eroded the center of the divider away(both were ductile iron), this is certainly caused by high(excessive) EGT's.

I have had another ductile block crack the divider, but it remained intact, also due to high EGT's. The other 50% of them(some steel) are still in service and will be updated as soon as we can get to them, Ronnie has run his for a year with no signs of erosion or cracking(ductile). If anyone wishes to make them out of mild steel, ductile, or even stainless steel I wish them the best of luck.
 
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Devider fabrication

It looks good R rated,
If you're after constructive criticism then I would be replacing the butterfly shaft with something much larger in diameter.
After experimenting with exhaust dividers in log manifolds for some years now, I can now fab. one that will last longer than a few months! My first attempt lasted close to 6 months before the mounting bolts pounded out the holes they went through, second attempt with much thicker diameter mounting bolts lasted around 18 months before needing replacement, third attempt lasted a couple of years, fourth attempt is still going strong after 2 years. While excessive e.g.t.'s are no doubt contributing to cracking/failure of components that are directly in the exhaust stream, I am more concerned with the sound/pressure waves that vibrate anything that they hit head on, as only 1 of my manifold dividers were subject to excessive e.g.t.'s, yet they all (except the current divider) eventually failed. Just something to think about!
 
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