350tpi vaccum question
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Junior Member
Joined: Aug 2008
Posts: 42
Likes: 0
From: Colchester,VT
Car: 91 Firebird Formula 350
Engine: TPI 350
Transmission: 700r4
Axle/Gears: 3:23
350tpi vaccum question
hey guys
i just knotice thats right or not. anyways my car idels a little off, its about 600rpm, im not sure if thats normal. i added a k&n filter and now hear a hissing noise, which u do get from those, but i think something is wrong, i swapped to stock filter back and same thing. its on the pass side only. help. thanks
i just knotice thats right or not. anyways my car idels a little off, its about 600rpm, im not sure if thats normal. i added a k&n filter and now hear a hissing noise, which u do get from those, but i think something is wrong, i swapped to stock filter back and same thing. its on the pass side only. help. thanks
Supreme Member
Joined: Jul 2005
Posts: 1,675
Likes: 3
From: Arab, Alabama
Car: 1988 Trans Am GTA
Engine: 350 4BBL
Transmission: 700R4
Axle/Gears: 3.27
Re: 350tpi vaccum question
hey guys
i just knotice thats right or not. anyways my car idels a little off, its about 600rpm, im not sure if thats normal. i added a k&n filter and now hear a hissing noise, which u do get from those, but i think something is wrong, i swapped to stock filter back and same thing. its on the pass side only. help. thanks
i just knotice thats right or not. anyways my car idels a little off, its about 600rpm, im not sure if thats normal. i added a k&n filter and now hear a hissing noise, which u do get from those, but i think something is wrong, i swapped to stock filter back and same thing. its on the pass side only. help. thanks
Joined: Feb 2007
Posts: 4,767
Likes: 63
From: Trumbull CT
Car: 87 TA clone
Engine: 70/70 Turbo 5.3 LS
Transmission: bullet proof 2004R
Axle/Gears: ford 8.8, 3.55 gears
Re: 350tpi vaccum question
idle for a 350tpi is from 450-600 in idle. the K&N filter is a TB mounted one?? im guessing bc yours is a 91 so its SD. there are really only 2 vacume lines on the TB... the one below the TB on the driver side its literally underneath the TB(connects with a 90 degree rubber end to the nipple fitting of the underside of the TB) the other is to the charcol canister and PCV system.
the hissing noise is most likely the air being sucked in through the new high flow filter... the stock stuff has silencers etc to quiet it but it also restricts flow... a good intake should be unrestrictive and LOUD! u will hear the air being sucked in even when the hood is closed... i can hear it on my 86TA and 87 formula 350. hope this helps
the hissing noise is most likely the air being sucked in through the new high flow filter... the stock stuff has silencers etc to quiet it but it also restricts flow... a good intake should be unrestrictive and LOUD! u will hear the air being sucked in even when the hood is closed... i can hear it on my 86TA and 87 formula 350. hope this helps
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