TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old Nov 23, 2002 | 03:43 PM
  #1  
ninjairoc's Avatar
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From: Upton, Massachusetts
Car: 1986 Camaro IROC-Z
Engine: 305 TPI
Transmission: 700R4
airflow

does anyone know the stock airflow specs(cfm???) of an '86 305TPI?
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Old Nov 23, 2002 | 04:29 PM
  #2  
mrr23's Avatar
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From: orlando, fl usa
Car: 1986 pontiac TA
Engine: 360 HSR
Transmission: 700r4 3300 yank converter
Axle/Gears: 3.27 9 bolt
i copied this off here awhile back

Part CFM
Stock base 222.5
Accel base 251.5
Extruded Accel base 275.8

Stock runner 203.2
Accel LTRunner 242
Super Ram runner 289.2
AS&M long tube runners 260


Stock base, stock runners 198.72
Stock base, Accel runners 213.5
Accel base, stock runners 215.8
Accel base, Accel runners 232.5
Accel base, Accel Super Ram 240.2
Accel base, extruded Accel runners 243.2
Extruded Accel base & runners 266.9
Stock base, Accel Super Ram 220.67
Stock base, Extrude Accel 217.11



Stock Throttle Body 48mm 670
Stock with Airfoil 709
AS&M 52mm 750
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Old Nov 23, 2002 | 05:10 PM
  #3  
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From: Upton, Massachusetts
Car: 1986 Camaro IROC-Z
Engine: 305 TPI
Transmission: 700R4
so is that a total of 670 cfm stock?
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Old Nov 23, 2002 | 05:12 PM
  #4  
mrr23's Avatar
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Joined: Oct 2001
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From: orlando, fl usa
Car: 1986 pontiac TA
Engine: 360 HSR
Transmission: 700r4 3300 yank converter
Axle/Gears: 3.27 9 bolt
no that's what the throttle body can flow. look at the stock base, stock runners number 198.72 cfm
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Old Nov 23, 2002 | 05:16 PM
  #5  
ninjairoc's Avatar
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From: Upton, Massachusetts
Car: 1986 Camaro IROC-Z
Engine: 305 TPI
Transmission: 700R4
so my induction cfm would be the stock base plate and stock runners @ 198.72cfm or added up @ 425.7cfm?
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Old Nov 23, 2002 | 05:19 PM
  #6  
mrr23's Avatar
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Joined: Oct 2001
Posts: 1,392
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From: orlando, fl usa
Car: 1986 pontiac TA
Engine: 360 HSR
Transmission: 700r4 3300 yank converter
Axle/Gears: 3.27 9 bolt
just 198.72 total. the intake can only flow at it's lowest restriction. even though the TB can flow 670 cfm, the total intake itself can only flow 198.72 cfm.
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Old Nov 23, 2002 | 05:21 PM
  #7  
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Joined: Jun 2002
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From: Upton, Massachusetts
Car: 1986 Camaro IROC-Z
Engine: 305 TPI
Transmission: 700R4
damn that sux huh? thanx for the clearification though
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Old Nov 23, 2002 | 05:22 PM
  #8  
mrr23's Avatar
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Joined: Oct 2001
Posts: 1,392
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From: orlando, fl usa
Car: 1986 pontiac TA
Engine: 360 HSR
Transmission: 700r4 3300 yank converter
Axle/Gears: 3.27 9 bolt
i think that number is off myself.
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Old Nov 23, 2002 | 05:24 PM
  #9  
ninjairoc's Avatar
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Joined: Jun 2002
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From: Upton, Massachusetts
Car: 1986 Camaro IROC-Z
Engine: 305 TPI
Transmission: 700R4
is there anyplace I can look that up and find out for sure?
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Old Nov 23, 2002 | 05:25 PM
  #10  
mrr23's Avatar
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Joined: Oct 2001
Posts: 1,392
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From: orlando, fl usa
Car: 1986 pontiac TA
Engine: 360 HSR
Transmission: 700r4 3300 yank converter
Axle/Gears: 3.27 9 bolt
not sure. i copied this from someone else here.
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