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Secondaries opening -- how to tell?

Old 01-15-2002, 04:26 PM
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jimduchek
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Default Secondaries opening -- how to tell?

What are different ways of knowing when and how far your vacuum secondaries are opening up? I know the old paper clip on the rod trick but I was wondering if there's any tricks on being able to tell while you're driving?

Jim

Old 01-15-2002, 04:34 PM
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Paul 75 L82
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Default Re: Secondaries opening -- how to tell? (jimduchek)

on a dyno you could see the motor under a load.
Old 01-15-2002, 04:57 PM
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jimduchek
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Default Re: Secondaries opening -- how to tell? (Paul 75 L82)

Unfortunately my dyno is in the shop for repairs... :jester

Jim

Old 01-15-2002, 06:45 PM
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rainman69
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Default Re: Secondaries opening -- how to tell? (jimduchek)

Drive with no hood and air cleaner? ...And a mirror mounted to see in the throats??? :jester

That's probably not safe, but it's an idea... :blueangel:
Old 01-15-2002, 08:22 PM
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AlwaysWave
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Default Re: Secondaries opening -- how to tell? (jimduchek)

http://forums.corvetteforum.com/zerothread?id=217984
Old 01-15-2002, 09:10 PM
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Budman68
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Default Re: Secondaries opening -- how to tell? (AlwaysWave)

Booooowwwwww.....That is without the air cleaner.
Old 01-15-2002, 09:46 PM
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topless68
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Default Re: Secondaries opening -- how to tell? (jimduchek)

Unfortunately my dyno is in the shop for repairs... :jester

:lol: :lol: :lol:
Old 01-15-2002, 10:02 PM
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Pedro'74
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Default Re: Secondaries opening -- how to tell? (rainman69)

Drive with no hood and air cleaner? ...And a mirror mounted to see in the throats??? :jester

That's probably not safe, but it's an idea... :blueangel:
Or use the Portuguese (*) method: put some small nuts or screws on the secondary valves, and go drive the car. If the engine starts making strange noises, that indicates that the secondary valves opened. :jester

(*) replace Portuguese by your favorite joke group: Polish, redneck, Belgium, etc.... :D

-Pedro
Old 01-15-2002, 10:14 PM
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Golden80
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Default Re: Secondaries opening -- how to tell? (Pedro'74)

Instead of a mirror find one of the local neigbor kids, not yours, to sit in the engine bay and hit the highway. Tell him you'll give him/her a cookie for helping you out. :lol:

Matt

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