Surge valve not opening
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Surge valve not opening Using the VS surge valve, it felt pretty stiff trying to push on it, with the engine running,
12-13" of vac, it doesnt open. It came with a second spring, but it felt stiffer. Anyone
ever just cut the spring until it could pull open with the vac. source avail. Not sure if there
is some other issue or just to stiff a spring. I had taken it apart and the piston seemed to
move ok.
12-13" of vac, it doesnt open. It came with a second spring, but it felt stiffer. Anyone
ever just cut the spring until it could pull open with the vac. source avail. Not sure if there
is some other issue or just to stiff a spring. I had taken it apart and the piston seemed to
move ok.
You dont want it to pull open with vacuum otherwise your pulling air through the cold side piping instead of the air filter. Find a spring light enough just to keep it closed at idle. If you snap the throttle, you should see it open briefly then close again. That’s how I set mine up. Been fine.
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Turbo-I hooked up a vac pump I got off an import, use it to bleed brakes. It can pull
over 25" of vac, the valve doesn't move. When I had it apart it moved fine, prob something
is machined off, gonna send it back.
over 25" of vac, the valve doesn't move. When I had it apart it moved fine, prob something
is machined off, gonna send it back.
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9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Depends on application which he still hasnt stated.
If blower, then it needs to open fast/easy.
If turbo...less of a concern, but if you want it to be functional then it still needs to be capable of opening.
If blower, then it needs to open fast/easy.
If turbo...less of a concern, but if you want it to be functional then it still needs to be capable of opening.
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
I wired it for man shift until I can afford a controller, but I disc. that which puts it
in limp mode, rev and 2nd. Still goes 1' for/back then locks up. Its got to come out,
I was only trying to get it in my other bay where the lift is, guess I need to call in some
muscle (pushers), lol. I'll just stick my old 400 in until I feel like tearing it down.
in limp mode, rev and 2nd. Still goes 1' for/back then locks up. Its got to come out,
I was only trying to get it in my other bay where the lift is, guess I need to call in some
muscle (pushers), lol. I'll just stick my old 400 in until I feel like tearing it down.
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
I saw that setup some time ago, wouldn't you need HP tuners to still adjust it.
Pulling the pan off the trans today, hoping maybe the 1st/rev band pin is holding
it, if not it has to come out. When I built it, it went together OK, was a little tight, but
I convinced myself it was OK, because I wanted this project running-my bad, lol.
Back on the valve, the spring that came with it was so strong it kind of jammed the
piston in the closed position, I found a weaker spring in my pile of parts (sometimes
its good I don't throw out stuff, lol) and with my hand vac it opens now-I will just have to
play with springs until I get the desired opening.
Pulling the pan off the trans today, hoping maybe the 1st/rev band pin is holding
it, if not it has to come out. When I built it, it went together OK, was a little tight, but
I convinced myself it was OK, because I wanted this project running-my bad, lol.
Back on the valve, the spring that came with it was so strong it kind of jammed the
piston in the closed position, I found a weaker spring in my pile of parts (sometimes
its good I don't throw out stuff, lol) and with my hand vac it opens now-I will just have to
play with springs until I get the desired opening.
huh i didnt know there was a 400 version of that. I had a "jetaway" 2 speed with the switch pitch converter and it worked rather well. of course being 19 i tossed it in the trash for an m21 set up lol
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Yep, 64-65 Big Buicks used them, chevy guys would convert their 400's with the parts.
I built this one years ago, now just use it as a stand by if I temp need a 400. The converter
is a 13", now I am a little worried it might not clear the turbo cross over pipe-$hit just keeps
snow balling, lol. Beer time tonight, had enough of cars..
I built this one years ago, now just use it as a stand by if I temp need a 400. The converter
is a 13", now I am a little worried it might not clear the turbo cross over pipe-$hit just keeps
snow balling, lol. Beer time tonight, had enough of cars..