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Old 09-10-2004, 07:58 PM   #1
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Join Date: Jul 2003
Location: So Cal
Posts: 543
Car: 1989 IROC-Z
Engine: 350 TPI
Transmission: 700R-4

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L98 Cylinder Head Flow Numbers

I was wondering if someone can list the flow numbers for my stock L98 iron heads? From .100 to .600 lift. Also, how drastically can a mild port and polish job change the numbers? I just need and idea of what numbers I can expect so I can plug stuff into desktop dyno. Thanks.
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1989 Chevrolet Camaro IROC-Z 350 TPI---KN filters...TB coolant bypass...SLP air foil...Carsound highflow cat...Spintech crossflow muffler...Hotchkis STB...Spohn Tubular SFCs...Eibach Pro-Kit...Bilstein Sports...Spohn LCAs and brackets...Spohn panhard bar...Spohn front/rear sway bar bushings and endlinks...new 350 and paint job coming soon.
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Old 09-10-2004, 08:06 PM   #2
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Join Date: Jan 2002
Location: Moscow, ID I need my own machine shop
Posts: 3,852
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer

Classifieds Rating: (0)
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LT1 headed LG4 305 beast! Comp Solid lifter XS-262-10S, 1.6 Roller Rockers, 10.2:1, Holley 4160 600cfm, modded Weiand 7502 intake to fit LT1 heads____ Custom cylinder head cooling. Weiand 8208 Short Water Pump____TH-350 3 series 3.73 with 2 series posi and spacer____ Hedman Hedders 1 5/8 headers and Y-pipe 3in Exhaust, Dynomax 3" Bullet muffler ____Moroso Ultra 40 Wires ACCEL HEI Super Coil ____Competition Engineering 3120 Bolt-on SFC's____Homemade: Wonderbar, solid tie rod sleeves, Aluminum LCA and Panhard Rod with spherical rod ends, alternator and PS bracket, Strut tower brace, and Decoupling torque arm with telescoping link.
3000lbs

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Old 09-10-2004, 08:09 PM   #3
Senior Member
 
Join Date: Jan 2002
Location: Moscow, ID I need my own machine shop
Posts: 3,852
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer

Classifieds Rating: (0)
Intake .05-.60
29.000000
56.000000
120.000000
160.000000
186.000000
196.000000
199.000000

Exhaust .05-.6
27.000000
52.000000
104.000000
133.000000
150.000000
170.000000
175.000000
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