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Registered
Join Date: Jan 2020
Posts: 57
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Tall or short manifold for a 3.2
Hi!
I am building a 3.2 engine with a 46 Weber. The engine is stock, only the cam is DC21 I have source for "short" and a "tall" PMO manifold set. The intake port is 41mm, The short set is 35mm diameter on the intake side and the tall set is 41mm. Which is better to install? I am installing this engine into a SWB car, is the tall set might be too tall? 
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08-06-2021, 10:40 PM
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tall. for midrange torque. I think
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80SC (ex California) |
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08-08-2021, 02:59 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,115
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In this case, you definitely want the 41mm as the ports are 41.5mm IIRC. Using a 35mm port will choke the heads for sure.
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood  , Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
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08-08-2021, 09:33 PM
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Jeff Day
Join Date: Aug 2021
Location: Coventry
Posts: 5
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 I can supply 98mm tall manifolds to suit 40 and 46 mm applications with up to 41mm ports. Also available with fuel injection bosses for efi, with a 100 mm tall throttle body, so the height is no taller than a conventional carb on a short manifold. A standard air filter still fits as well 
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08-08-2021, 10:30 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,467
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Remember, the heads on 3.2, the intakes are shorter at least by the thickness of the insulator and one intake gasket
I’d go tall… Bruce |
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08-11-2021, 03:25 PM
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Registered
Join Date: Jan 2020
Posts: 57
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Just checked the space between the heads and the engine roof.
Seems like the "tall" intake can hardly fit with the K&H filter house |
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08-12-2021, 09:17 AM
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Jeff Day
Join Date: Aug 2021
Location: Coventry
Posts: 5
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Quote:
Last edited by Westbound; 08-15-2021 at 01:41 AM.. |
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08-15-2021, 01:32 AM
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Racer
Join Date: Oct 2010
Location: Franklin, TN
Posts: 5,885
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Go tall....
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Scott Winders PCA GT3 #3 2021 & 2022 PCA GT3 National Champion 2021 & 2022 PCA West Coast Series GT3 Champion |
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08-15-2021, 01:42 AM
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Jeff Day
Join Date: Aug 2021
Location: Coventry
Posts: 5
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Quote:
 Pictured is the prototypes, production will be better finished, and linkages zinc plated Last edited by Westbound; 08-15-2021 at 01:46 AM.. |
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08-15-2021, 01:43 AM
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911SC
