TPIS runners install problem
Thread Starter
Pro
Joined: Dec 2002
Posts: 522
Likes: 3
From: Rolling Meadows IL
TPIS runners install problem
I installed TPIS runners on my 85 with iron heads. The tube on the pass. side that goes from the valve cover to the TB won't fit between the runners and the valve covers. Do I replace the metal tube with a rubber hose? Anyone else have this problem.
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Re: TPIS runners install problem (dave_85)
Yeah You can use a rubber hose if some of the pipes no longer fit.I ran a rubber hose from the TB straight to the valve cover grommet pipe and it worked fine for years.
:)
:)
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Re: TPIS runners install problem (dave_85)
You can also just eliminate the tube altogether.
All you need to do is put a plug on teh Throttlebody where the hose would connect, and put an open breather on the valve cover..
As logn as you don't have major blowby you should not get anything out of there, but vacuum. Looks better too.. :cheers:
All you need to do is put a plug on teh Throttlebody where the hose would connect, and put an open breather on the valve cover..
As logn as you don't have major blowby you should not get anything out of there, but vacuum. Looks better too.. :cheers:
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: TPIS runners install problem (MrNuke)
You can also just eliminate the tube altogether.
All you need to do is put a plug on teh Throttlebody where the hose would connect, and put an open breather on the valve cover..
As logn as you don't have major blowby you should not get anything out of there, but vacuum. Looks better too.. :cheers:
All you need to do is put a plug on teh Throttlebody where the hose would connect, and put an open breather on the valve cover..
As logn as you don't have major blowby you should not get anything out of there, but vacuum. Looks better too.. :cheers:
Le Mans Master
Joined: Jul 2001
Posts: 5,297
Likes: 0
From: Stamford VT
Re: TPIS runners install problem (CentralCoaster)
I'm sure this has been run through the mud before, but wouldn't that introduce a huge vacuum leak to the system? and render the IAC control ineffective?
Safety Car
Joined: May 1999
Posts: 3,651
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From: Atlantis
Cruise-In I Veteran
Re: TPIS runners install problem (Jim85IROC)
I'm sure this has been run through the mud before, but wouldn't that introduce a huge vacuum leak to the system? and render the IAC control ineffective?
The tube just routes fumes from the engine to the throttle body.
What would be better? Engine blowby fumes or clean air going into that throttle body opening?
Anyway the previous poster said to put a plug on the throttle body port.
No problem like that.
It's just part of the PCV system. The PCV valve is on the other (driver)valve cover.
Air flowing past the "hump" in the plenum generates a low pressure that siphons air through the PCV valve.
When there is low manifold pressure the fumes travel through the passenger side vent tube to the throttle body where they mix with incoming air and get burned.
Putting a breather on the passenger side will keep the PCV system working.
Thread Starter
Pro
Joined: Dec 2002
Posts: 522
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From: Rolling Meadows IL
Re: TPIS runners install problem (VetNutJim)
Thanks for all the help. I ended up using some ½ inch radiator hose and a straight hose barb. I used one piece of hose from the TB routed under the runners and connected it were the end of the original tube would have with the hose barb. It looks good.
Le Mans Master
Joined: Jul 2001
Posts: 5,297
Likes: 0
From: Stamford VT
Re: TPIS runners install problem (VetNutJim)
I'm sure this has been run through the mud before, but wouldn't that introduce a huge vacuum leak to the system? and render the IAC control ineffective?
UH-UH it won't either.
The tube just routes fumes from the engine to the throttle body.
What would be better? Engine blowby fumes or clean air going into that throttle body opening?
Anyway the previous poster said to put a plug on the throttle body port.
No problem like that.
It's just part of the PCV system. The PCV valve is on the other (driver)valve cover.
Air flowing past the "hump" in the plenum generates a low pressure that siphons air through the PCV valve.
When there is low manifold pressure the fumes travel through the passenger side vent tube to the throttle body where they mix with incoming air and get burned.
Putting a breather on the passenger side will keep the PCV system working.
UH-UH it won't either.
The tube just routes fumes from the engine to the throttle body.
What would be better? Engine blowby fumes or clean air going into that throttle body opening?
Anyway the previous poster said to put a plug on the throttle body port.
No problem like that.
It's just part of the PCV system. The PCV valve is on the other (driver)valve cover.
Air flowing past the "hump" in the plenum generates a low pressure that siphons air through the PCV valve.
When there is low manifold pressure the fumes travel through the passenger side vent tube to the throttle body where they mix with incoming air and get burned.
Putting a breather on the passenger side will keep the PCV system working.
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