TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

Pcv valve ???

Thread Tools
 
Search this Thread
 
Old Apr 18, 2012 | 08:47 PM
  #1  
soarestransam's Avatar
Thread Starter
Senior Member
10 Year Member
 
Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Pcv valve ???

Ok so I noticed that the tpi has two Pcv valves I'm installing pre 86 edelbrock valve covers an it only has one port for the Pcv an one big one for the oil fill plug is it ok to just use one Pcv or do I need two???
Reply
Old Apr 18, 2012 | 09:15 PM
  #2  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Pcv valve ???

you will need a breather cap for the fill and the provision for the pcv on the other head and cap the tb
Reply
Old Apr 18, 2012 | 09:35 PM
  #3  
Apeiron's Avatar
Moderator
 
Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Pcv valve ???

The TPI has one PCV valve.
Reply
Old Apr 18, 2012 | 10:40 PM
  #4  
soarestransam's Avatar
Thread Starter
Senior Member
10 Year Member
 
Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Re: Pcv valve ???

Hmmmm weird cause when i disassembled my stock 350 today to pull the motor out i took two pcv valves off one that goes into the intake manifold an one that was hooked up to the throttle body
Reply
Old Apr 18, 2012 | 11:05 PM
  #5  
vetteoz's Avatar
Supreme Member
20 Year Member
iTrader: (13)
 
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Pcv valve ???

Originally Posted by soarestransam
i took two pcv valves off one that goes into the intake manifold an one that was hooked up to the throttle body
So if you did someone has ( wrongly ) put one in the pass side cover;
Reply
Old Apr 19, 2012 | 12:11 AM
  #6  
Apeiron's Avatar
Moderator
 
Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Pcv valve ???

Originally Posted by soarestransam
Hmmmm weird cause when i disassembled my stock 350 today to pull the motor out i took two pcv valves off one that goes into the intake manifold an one that was hooked up to the throttle body
One is a PCV valve, one is an elbow, unless someone has done something dumb.
Reply
Old Apr 19, 2012 | 09:37 AM
  #7  
soarestransam's Avatar
Thread Starter
Senior Member
10 Year Member
 
Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Re: Pcv valve ???

Yea sO i think it was right do i need the elbow or could i just block it off
Reply
Old Apr 19, 2012 | 10:57 AM
  #8  
Apeiron's Avatar
Moderator
 
Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Pcv valve ???

You need the elbow, or at least something on that side to let clean air in. The factory setup is the cleanest possible way to do it.
Reply
Old Apr 19, 2012 | 11:36 AM
  #9  
soarestransam's Avatar
Thread Starter
Senior Member
10 Year Member
 
Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Re: Pcv valve ???

Ok so ill just get a breather an see if that will work i then have to block it off from the throttle body
Reply
Old Apr 19, 2012 | 11:50 AM
  #10  
Apeiron's Avatar
Moderator
 
Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Pcv valve ???

And clean your valvecover on a regular basis.
Reply
Old Apr 19, 2012 | 09:48 PM
  #11  
vetteoz's Avatar
Supreme Member
20 Year Member
iTrader: (13)
 
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Pcv valve ???

Originally Posted by soarestransam
Ok so ill just get a breather an see if that will work i then have to block it off from the throttle body
No can do.
On your MAF car , PCV air must come from the TB port ( metered);
otherwise you just have a big air leak @ idle
Reply
Old Apr 20, 2012 | 09:38 AM
  #12  
soarestransam's Avatar
Thread Starter
Senior Member
10 Year Member
 
Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Re: Pcv valve ???

Ok so what you are saying is to get a breather woth a vac port to hook up to the throttle body an also use that as a oil fill this will be on the passenger side of the motor an for the drivers side it will be the pcv valve hooked up to manifold vac port right under the fuel rail on the drivers side of the intake manifold
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tyeo098
Tech / General Engine
38
Nov 30, 2015 06:27 PM
sleprock
Power Adders
9
Sep 24, 2015 04:33 PM
CatmanFS
LTX and LSX
1
Sep 19, 2015 09:00 AM
355tpipickup
Tech / General Engine
9
Sep 13, 2015 11:35 PM
sandman92084
Tech / General Engine
13
Sep 12, 2015 10:27 PM




All times are GMT -5. The time now is 10:42 PM.