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Vortec Heads Flowed with 2.02/1.60 Valves

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Old Apr 8, 2014 | 08:34 PM
  #1  
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Car: 1990 G92 IROC Z Miniram
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Axle/Gears: 3.73 Gears
Vortec Heads Flowed with 2.02/1.60 Valves

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What you guys think?
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Old Apr 9, 2014 | 08:05 AM
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Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Vortec Heads Flowed with 2.02/1.60 Valves

Great numbers and on a 170cc intake. I am not sure what you have into them price wise but posts like this should make anyone even considering junk like procomp run for the hills. The best increase is on the exhaust side. usually the vortecs are weak on exhaust flow but it looks like that has been fixed.
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Old Apr 9, 2014 | 08:26 AM
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Vortec Heads Flowed with 2.02/1.60 Valves

Originally Posted by midias
Great numbers and on a 170cc intake. I am not sure what you have into them price wise but posts like this should make anyone even considering junk like procomp run for the hills. The best increase is on the exhaust side. usually the vortecs are weak on exhaust flow but it looks like that has been fixed.
You should see what a small amount of chamber work, cnc exhaust work and 2.05/1.60s make 906s flow like! My intake flow was 265 @ .500 and exhaust was 220 @ .500! Made over 300 RWHP with TBI on a dual plane performer intake and a production GM LT4 cam with 1.6:1 rockers. Upped the cam slightly to a Reed Roller in the mid 21x @ .050 and went with a 2bbl victor jr single plane and increased power to 365 RWHP on a 8.9:1 (18cc dished pistons) 350 that was turning an unlocked 700r4, heavy 2 piece steel driveshaft with carrier bearing and GM 9.5" corporate 14-bolt.
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Old Apr 9, 2014 | 04:24 PM
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From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
Re: Vortec Heads Flowed with 2.02/1.60 Valves

A ZZ9 cam will be used with Siamesed Edelbrock runners, Dyno Don Headers, ported Vortec base, 24lbs injectors, 52mm TB, 700r4 and 3.23 gears in a 91 Z28. Chip will be tune by Kevin91z at the Dyno.
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Old Apr 9, 2014 | 04:35 PM
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Vortec Heads Flowed with 2.02/1.60 Valves

Originally Posted by VincentZ28
A ZZ9 cam will be used with Siamesed Edelbrock runners, Dyno Don Headers, ported Vortec base, 24lbs injectors, 52mm TB, 700r4 and 3.23 gears in a 91 Z28. Chip will be tune by Kevin91z at the Dyno.
Sounds like it will be a strong runner.....Looking forward to dyno charts when it gets dialed in. Sounds like it should be in the 350 RWHP range if not a little more.
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Old Apr 9, 2014 | 04:50 PM
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From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
Re: Vortec Heads Flowed with 2.02/1.60 Valves

Originally Posted by Fast355
Sounds like it will be a strong runner.....Looking forward to dyno charts when it gets dialed in. Sounds like it should be in the 350 RWHP range if not a little more.
I hope so!
Oh yea! It also has dual cats and a 3in Magnaflow cat-back exhaust system. The A/C and all the smog stuff will be on and working.
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Old Apr 9, 2014 | 05:19 PM
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Car: 87 IROC
Engine: L31 350
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Axle/Gears: 4.10 D44
Re: Vortec Heads Flowed with 2.02/1.60 Valves

@ Vincent - What did the porting cost? Who did it? And is it available to anyone?
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Old Apr 9, 2014 | 06:19 PM
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Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Vortec Heads Flowed with 2.02/1.60 Valves

I did the porting to the intake and exhaust, Dr. J did the valves and bowl work.
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