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Intake manifold for TBI

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Old Mar 13, 2010 | 04:32 PM
  #1  
Piston454's Avatar
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Car: 1990 RS Camaro
Engine: 400 sbc throttle body
Transmission: world class t5 manual
Axle/Gears: 3.73's, Detroit TrueTrac
Intake manifold for TBI

i am building a new 350 for my 1990 camrao rs that originally had a 305. and i am looking for a high performance intake manifold for a TBI. any suggestions?
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Old Mar 13, 2010 | 05:35 PM
  #2  
UNCLE TOM's Avatar
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From: ms. gulf coast
Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
Re: Intake manifold for TBI

edelbrock is the only one I know that makes an aftermarket manifold for T.B.I. . theirs is pn# EDL-3704 . i can't back up their claims , but they have been manufacturing quality performance parts as long as i can remember . at my age ( damn i'm old , 70 + ) and i have been a gearhead forever . i can remember quality hot rod parts from them . anybody remember flat head engines ??? good luck .
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Old Mar 13, 2010 | 08:41 PM
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xX89RSXx's Avatar
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From: Cumberland, RI
Car: 1989 Camaro RS
Engine: 305 TBI
Transmission: 700R4
Re: Intake manifold for TBI

Your best bet is to get an intake ment for a carb and put an adapter plate if keeping tbi. There is a topic on here with flow numbers for the edl-3704. It is better than stock but not too much.
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Old Mar 14, 2010 | 07:56 PM
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Piston454's Avatar
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Car: 1990 RS Camaro
Engine: 400 sbc throttle body
Transmission: world class t5 manual
Axle/Gears: 3.73's, Detroit TrueTrac
Re: Intake manifold for TBI

ya is it worth to spend 200 + dollars on a new manifold for the amount of hp its going to give me over stock?
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Old Mar 15, 2010 | 01:56 PM
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From: Cumberland, RI
Car: 1989 Camaro RS
Engine: 305 TBI
Transmission: 700R4
Re: Intake manifold for TBI

Originally Posted by Piston454
ya is it worth to spend 200 + dollars on a new manifold for the amount of hp its going to give me over stock?
Not for me. There are much better intakes out there that will give you better gains.
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Old Mar 15, 2010 | 02:04 PM
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Re: Intake manifold for TBI

"Building a new 350" does not provide much info to go on. Edelbrock advertises 5500 rpms max range and Holley is rated up to 6000 rpms. Edelbrock stand 5.10 inches tall and Holley more of a high rise at 5.40 inches. Edel port size 1.13 x 1.87 vs Holley 1.15 x 1.89 inch. Best value would be a carb manifold with TBI adapter. Lot of choices there. Why not GM performance Vortec heads with a Professsional Products Vortec manifold? That is the best value for HP vs cost.
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