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03-24-2012, 05:57 PM
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#1 |
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One Slow Automatic
Drives: 2017 GS 2010 CAMARO SS Join Date: Mar 2010
Location: NC NJ NY DMV THE BAYAREA
Posts: 877
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CNC ported TB VS hand polished TB
Whats the difference in performance and HP between the two?
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650HP 2010 CAMARO SS 710HP 2017 GRAND SPORT
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03-24-2012, 06:15 PM
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#2 |
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knows 2 facts about ducks
Drives: ...and they're both wrong Join Date: Aug 2009
Location: The HMS Invincible
Posts: 25,072
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polishing the inside of a TB actually hurts airflow first off, and the VMax ported TB is proved to be the best on the market.
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03-24-2012, 08:17 PM
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#3 |
           
Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012
Location: Vance Alabama
Posts: 8,019
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Same difference as with hand ported cylinder heads and CNC cut ones.
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Retired wanna be cylinder head porter
2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X |
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03-24-2012, 09:01 PM
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#4 |
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Brianskeet
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You have hit on a subject that has seen a lot of trafic. The short version is the VMax CNC ported throttle body is 100% repeatable due to the accuracy of modern CNC machinines. They did the R&D time to come up with a porting job that produces fantastic throttle response and yes some power. No porting job will produce huge power it is just not possible, but VMax produces what is available. The much more valuable part of the porting is crisp precise throttle response. I saw it as part of a "breathing package" for my LS motor. Intake, scoop, washer relocate, and ported throttle body. That took care of the inhale. ARH long tubes and Corsa took care of the exhale.
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 ARH 1 7/8 coated LT, High flows, Corsa L99 exhaust, Vmax CNC throttle body, Elite Engineering catch can and tunnel brace, C.A.I. Apex Washer relocation and scoop, Janetty Tune, MSD wires, DEI heat shields, RB rotors and pads, Mike the powder coater calipers, pedders lines, Forgestar F14's, Gorilla nutz, MTI spoiler finished by Gary, Gary's Customz Bow Ties, Side Markers and Tails tinted, Bezels matte black, Badges deleted, Windows Tinted, AAC DRL P13W lights, AAC tinted LED reverse lights, AAC LED interior lights, RPI match painted DRL Bezels, Lis plate frame, Lloyds mats |
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03-25-2012, 11:13 PM
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#5 |
 
Drives: C6 Z06 Join Date: Nov 2010
Location: Houston TX
Posts: 109
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The engine wont care how the shape was made. The whole point of having a CNC program is repeatability and time - its highly repeatable and takes practically "no" time compared to performing the action by hand.
And FYI NASCAR heads do the initial porting on a CNC and they finish off the porting by hand... there are just certain spots the CNC machine cant reach very well. |
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02-12-2013, 05:04 PM
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#6 |
Drives: 2011 Camaro SS Join Date: Dec 2012
Location: Bradenton, FL
Posts: 2,610
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All the VMAX throttle bodies are CNC spiral ported for consistency. Not saying hand-ported ones do not work, but there is always a human error factor involved. Actually out of the hand-ported TB's my first choice would be Bo White...
Back to back dyno graphs comparing Stock to VMax. |
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