Detailed throttle body pics?
10-02-2005, 08:51 PM
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Car: Bee-Bowdy
Engine: blowd tree-fity
Transmission: sebin hunnerd
Axle/Gears: fo-tins
Detailed throttle body pics?
I just finished my TPI conversion. There are 2 ports on the passenger side of the throttle body and I'm not sure what they are both for. I assume 1 of them is for the PCV.
Does anyone know where the upper and lower ports go to? I've tried both AllData and Mitchells for a diagram but they're all terrible...
Does anyone know where the upper and lower ports go to? I've tried both AllData and Mitchells for a diagram but they're all terrible...
10-02-2005, 09:02 PM
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Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
The large upper one goes to the vent hose on the passenger side valve cover. The one right below it goes to some part of the charcoal canister system (the largest hose on the canister I believe).
10-02-2005, 09:05 PM
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Car: '89 Trans Am
Engine: 350 TPI
Transmission: T-5
Axle/Gears: 9 bolt 3.23 posi disks
the top one goes into the charchol canister and the bottom one goes into the pass. side valve cover
EDIT:
turns out mine were on reversed
EDIT:
turns out mine were on reversed
Last edited by ncgator; 10-06-2005 at 06:38 AM.
10-02-2005, 09:17 PM
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Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Originally posted by ncgator
the top one goes into the charchol canister and the bottom one goes into the pass. side valve cover
the top one goes into the charchol canister and the bottom one goes into the pass. side valve cover
10-02-2005, 09:27 PM
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Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
The top one is not a vacume port. It was mentioned above it goes to a vent hole on the passenger side valve cover. Or you could leave it open and just put a breather on the cover. There is no vacume with the upper hole. Bottom hose goes to a charcoal canister which sucks in fumes from the gas tank. Vac port under the throttle body gets connected to the EGR Silonoid. (sp)
10-02-2005, 09:29 PM
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Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
Accually the hose from the bottom part of the TB gets an adapter to accept 5/16in vac hose which goes to the SMALLEST port on the canister.
Largest port on the canister get a hose lead out into the fender and the middle sized port gets the hose from the Fuel vent steel line on the frame rail.
Largest port on the canister get a hose lead out into the fender and the middle sized port gets the hose from the Fuel vent steel line on the frame rail.
10-03-2005, 07:48 AM
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Car: Bee-Bowdy
Engine: blowd tree-fity
Transmission: sebin hunnerd
Axle/Gears: fo-tins
Thanks. I'm not using CCP so I guess I'll only use the top port for the PCV.
The vac port for the EGR solenoid is capped as well.
The vac port for the EGR solenoid is capped as well.
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10-03-2005, 08:06 AM
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10-03-2005, 11:24 AM
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Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
There are a couple of ways I've seen the routings.
One way is this is a "closed PVC" system that has one port from the throttle body directly behind the air filter but in front of the throttle blades. This hose would bring fresh air (filtered) into the cranckcase through one of the valve covers.
The other port on the throttle body is behind the throttle blades and has constant vacuum from the engine. That one "usually" is connected to the PCV valve on the opposite valve cover to pull the air out of the crankcase.
Keeps a nice clean circulation of air.
The way mine was previously is the canister purge was connected to the port behind the throttle blades to always pull purge air into the motor when it was opened and the fresh air (filtered port) line went to a valve cover.
The opposite valve cover had the PCV valve and routed directly into the base manifold for full vacuum.
Either way seems ok, You'll probably use the first setup I mentioned.
One way is this is a "closed PVC" system that has one port from the throttle body directly behind the air filter but in front of the throttle blades. This hose would bring fresh air (filtered) into the cranckcase through one of the valve covers.
The other port on the throttle body is behind the throttle blades and has constant vacuum from the engine. That one "usually" is connected to the PCV valve on the opposite valve cover to pull the air out of the crankcase.
Keeps a nice clean circulation of air.
The way mine was previously is the canister purge was connected to the port behind the throttle blades to always pull purge air into the motor when it was opened and the fresh air (filtered port) line went to a valve cover.
The opposite valve cover had the PCV valve and routed directly into the base manifold for full vacuum.
Either way seems ok, You'll probably use the first setup I mentioned.
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