102mm TB vs 90mm TB - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

1989GTA · 05-26-2014, 11:10 PM

I saw this post on another forum and found it quite interesting. I have no more information than what is in the thread.

I recently built a 451 CID engine - 12:1 compression - ALL PRO LSW12-1 heads by WCCH - 252/272 solid roller cam - Tony Mamo ported F.A.S.T. 102 intake and a Nick Williams 102 mm throttle body. During engine dyno testing, we ran a comparison of the 102mm throttle body versus a Mamo-ported 90mm throttle body.

The results were that the 102 made 8 hp more than the 90 above 6,500 rpms and lost 25 lb-ft of torque in the mid-range. I sold the 102 and am running the 90mm throttle body.

Mean Green Z28 · 05-27-2014, 12:29 AM

Probabaly due to air velocity vs. volume at the given rpm? Just shooting from the hip here...

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1989GTA · 05-27-2014, 11:27 AM

Quote:

Originally Posted by Mean Green Z28

Probabaly due to air velocity vs. volume at the given rpm? Just shooting from the hip here...

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I don't know either. Not what I thought would have happened at the mid range.

05-26-2014, 11:10 PM	#1
1989GTA Drives: 1989 GTA Trans Am Join Date: Jun 2012 Location: Cypress, California Posts: 610	102mm TB vs 90mm TB I saw this post on another forum and found it quite interesting. I have no more information than what is in the thread. I recently built a 451 CID engine - 12:1 compression - ALL PRO LSW12-1 heads by WCCH - 252/272 solid roller cam - Tony Mamo ported F.A.S.T. 102 intake and a Nick Williams 102 mm throttle body. During engine dyno testing, we ran a comparison of the 102mm throttle body versus a Mamo-ported 90mm throttle body. The results were that the 102 made 8 hp more than the 90 above 6,500 rpms and lost 25 lb-ft of torque in the mid-range. I sold the 102 and am running the 90mm throttle body.

05-27-2014, 12:29 AM	#2
Mean Green Z28 Drives: 2010 2SS Join Date: Aug 2013 Location: Annapolis, MD Posts: 941 View My Garage	Probabaly due to air velocity vs. volume at the given rpm? Just shooting from the hip here... Sent from my SAMSUNG-SGH-I747 using Tapatalk __________________ 2010 2SS - CAI Intake, ADM Scoop, RotoFab Washer relo. LT Headers and off-road pipes, X-pipe, Muffler Deletes, ZL1 Spoiler, Technostalgia Tail-lights '98 T/A (Sold) - Forged 6.0ltr, MS3, P&P'd Heads/Valves, 90MM FAST/TB, Headers, 3" Y-pipe, 4" Mufflex Catback. Koni Adjustables w/GC coilovers (550/175), Strano Sway Bars '94 Z28 (Sold) ... LS1 swap (basically same setup as the T/A), TH350/3500 stall ... swapped it all into the T/A -- >> Some of my Projects My Fquick Page