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02-13-2012, 12:30 PM
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#1 |
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Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Carb'd GenIII-single or dual plane?
OK, I plan to put a carb on my LS1 engine. My question is which intake should I get?
I know a dual plane will offer better low end torque, while a single plane will offer better higher rpm power. I asked the same question on at LS1tech.com and got different answers. Most favor the single plane design on GenIII motors because they make such a wide torque range to begin with. Who has what? Why? And how do you like it?
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02-13-2012, 11:27 PM
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#2 |
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Moderator
 
Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,888
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Re: Carb'd GenIII-single or dual plane?
Asked myself the same question...then I threw caution to the wind and went with a single plane (Victor Junior) simply because they look cooler
 
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'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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02-14-2012, 09:21 AM
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#3 |
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Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: Carb'd GenIII-single or dual plane?
Yeah, they do look better. I just passed up a GREAT deal on a GM single plane on LS1Tech for $300 still NIB. I guess I should've jumped on it. It ended up selling for $275 shipped. With the cam, stall and gear I plan to run, though, I would think I'll need the extra low end torque.
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02-14-2012, 09:55 AM
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#4 |
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Registered User
Join Date: Dec 2009
Location: lindale,tx
Posts: 2,373
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Re: Carb'd GenIII-single or dual plane?
I have the duel plain maniflod on mine and it has tons of low end even with my cam. I am sure you will lose a bit of hi end power with the duel but how often are you at 5000rpm compared to 2000 rpm.
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82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle |
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02-14-2012, 05:39 PM
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#5 | |
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Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: Carb'd GenIII-single or dual plane?
Quote:
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02-14-2012, 06:26 PM
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#6 |
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Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
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Re: Carb'd GenIII-single or dual plane?
mine's a genIV (rectangular intake ports) but I also run a dual plane...and my motor also puts out gobs of torque yet pulls strong up thru 6k-6500rpm or so.
 
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Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken |
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02-14-2012, 10:12 PM
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#7 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: Carb'd GenIII-single or dual plane?
I would go 2 plane, on a heavy truck....but I have the complete parts truck(fullie)? Gonna be a chit load of wires to hide, but I want the mileage
 crazyL
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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02-23-2012, 02:22 AM
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#8 |
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Registered User
Join Date: Feb 2012
Location: davidson north carolina
Posts: 105
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Re: Carb'd GenIII-single or dual plane?
ive tested both of edelbrocks offerings and the result was that the dual plane intake didnt give up anything all the way to 6500rpm with a stock 6.0 and a zo6 cam in a foxbody coupe with a race car style set-up,so i'd imagine in a truck on the street it would be the better choice....hope this helps...billy.
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