I'd like to know if it's a good idea to take down that wall in the plenum. I'm thinking of doing this since I gotta remove the plenum for the AFPR install.
I'm also putting on TES.
There will be all this extra breathing w/the headers/cat back and "opened" plenum. My question is, is that too much breathing for a 305. Will there be TQ loss at lower RPM. Will there be loss in throtle responce? Please keep in mind that I will not port the plenum/runners and will step up the fuel pressure.
I'd like some advice and/or reasurance.
Thanks to all who respond, in advance.

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1990 Formula
Factory:WS6-TPI-305/Dual Cat/5 Speed,3.42 rear, Aluminum Drive Shaft.
Mods:SLP air foil,K&N Filter,All Accel ignition parts,Hypertech Thermomaster chip,Stat,Fan switch.Flowmaster 3" Cat-back exhaust,TB coolant bypass, Centerforce clutch.
Weight delete:Back seat-backs,spare tire.
Near future plans:Some runs at Raceway Park for a time slip, After headers install.Before cam+heads mods.

 

If you're refering to the two walls in the throttle body openings in the front of the plenum, then hell yes! Thats one of the "free mods" you can do to get more power out of your engine.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
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