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TPI throttle body cover function

Old 12-29-2018, 10:34 PM
  #1  
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Location: Wichita, KS
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Car: 1987 GTA
Engine: 5.7 L98
Transmission: 700R4
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TPI throttle body cover function

I know it wouldn't be designed and on there, but I've scoured the internet as well as the forums here and all I find is cool pretty replacements, but nothing in depth about the function of the chamber beneath the cover. I'm also wondering if a bad gasket/leak would affect idle or performance in any way.

Any gurus out there that has this information that could share? Many thanks in advance, any input is appreciated!
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Old 12-29-2018, 11:25 PM
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Car: 89 GTA ASC Conv., Prev: 89 GTA 6.3L
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Re: TPI throttle body cover function

Part of airflow for idle circuit w throttle blades closed?
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Old 12-30-2018, 01:47 PM
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Re: TPI throttle body cover function

I think it’s a passage for pcv
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Old 12-30-2018, 01:53 PM
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Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: TPI throttle body cover function



You can see how the large vent line for the pcv connects to the air inlet on the upper side of the front of the throttle body.
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