Stock TPI Plenum
Thread Starter
Joined: Aug 1999
Posts: 492
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From: Aurora, ON, Canada
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 4 Spd Auto
Stock TPI Plenum
Does anyone know if I replace the stock base and runners, weather or not the stock plenum will flow enough for around 450 hp, the way it is or ported?? I like the look of the stock tpi setup and dont want a mini ram or something like that.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
He's asking about the plenum, if he changes his runners/TB to aftermarket. 
And yes, port the plenum to match the TB and the runners, and it'll handle lots of HP.
------------------
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
-=ICON Motorsports=-
And yes, port the plenum to match the TB and the runners, and it'll handle lots of HP.------------------
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
-=ICON Motorsports=-
Member
Joined: Apr 2000
Posts: 213
Likes: 0
From: Ok, USA
Those stock plenums are quite good it is the runners and base plate that you ahve to worry about. But you have that covered. I say go for it but get a 52mm throttle body.
------------------
TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph
"Speed kills, wanna live forever, drive a Ford."
------------------
TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph
"Speed kills, wanna live forever, drive a Ford."
Member
Joined: Sep 1999
Posts: 265
Likes: 0
From: Melbourne, FL
A ported plenum should flow enough, but I hope you have plans for a lot of cubic inches if you are looking for 450hp.
------------------
Mike
'90 IROC-Z, 5-speed, ZZ4, Trick Flows
Moderator SEThirdgen
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Mike
'90 IROC-Z, 5-speed, ZZ4, Trick Flows
Moderator SEThirdgen
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Junior Member
Joined: Jan 2000
Posts: 6
Likes: 0
From: Camp Pendleton,CA
Try going to this web site www.TPIS.COM
They have some options for you for your runners if your not going to have it done yourself.
------------------
91 CAMARO Z28
350 5.7 TPI (L98)
108,000 miles still stock and running strong!
They have some options for you for your runners if your not going to have it done yourself.
------------------
91 CAMARO Z28
350 5.7 TPI (L98)
108,000 miles still stock and running strong!
Senior Member
Joined: Jul 1999
Posts: 900
Likes: 1
From: Haslett, MI
Car: 1984 Trans Am WS6
Engine: Minirammed 385, 396 RWHP
Transmission: T56
Axle/Gears: 3.73 Moser 12-bolt
I can gasket match the plenum and port it for $60, if you are interested.
see: http://www.isthq.com/~dan/efi.html
------------------
Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff. PST suspension, Braided stainless brake lines, Koni struts, 11-inch rear disks,Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
New best E/T! 14.039 at 100.82 MPH in 41 degree air at Stanton, Michigan.
see: http://www.isthq.com/~dan/efi.html
------------------
Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff. PST suspension, Braided stainless brake lines, Koni struts, 11-inch rear disks,Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
New best E/T! 14.039 at 100.82 MPH in 41 degree air at Stanton, Michigan.
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