LS carburetor intake using a stock DBW throttle body?, pls help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

vannatta20 · 08-11-2013, 06:35 AM

I have an idea and want to know if its possible to do. I want to get a LS carb intake with EFI bungs and mount a stock DBW 78mm throttle body off an 2004 5.3 intake on it. Can i mount the throttle body on it like a carb? I can fab up an adapter plate. I will probably run a speed density tune so I wont need a MAF. I can then fab up a mount to house a old school air cleaner on top of it to make it look somewhat period correct. With the DBW throttle body i can retain cruise control easily. I have hptuners and can adjust most settings to get this to work. Pls help me with inputs to get this working.

http://www.summitracing.com/parts/nal-88958675

Matt Cramer · 08-11-2013, 07:17 AM

There are off the shelf adapters for that purpose, but most of them have a 90 degree bend for hood clearance, like this one:

http://www.summitracing.com/parts/edl-3847/overview/

Making a straight adapter should be petty easy, especially since you don't have to worry about throttle cables. You could probably just take a square of steel or aluminum plate and drill it with the appropriate bolt patterns.

vannatta20 · 08-12-2013, 12:41 AM

Found this today. Mast motorsports has done it.

http://www.mastmotorsports.com/2010/...0System&id=487

68GMCCustom · 08-12-2013, 01:11 PM

wow that looks restrictive...like it needs a 102mm TB.

vannatta20 · 08-13-2013, 03:00 AM

a 87mm throttle body flows around a 1000 cfm from what i read.

Wasted Income · 08-13-2013, 10:35 AM

That's pretty slick. I like it.

BR3W CITY · 08-13-2013, 12:26 PM

Weird, my post disappeared. Few companies have done it, I like the idea but it also requires going with an SD tune.

Wasted Income · 08-13-2013, 12:37 PM

Quote:

Originally Posted by BR3W CITY

I like the idea but it also requires going with an SD tune.

Funny...that's the same reason I DO like it.

dkauffman05 · 08-14-2013, 08:58 PM

WOW! Can't believe this came up . I always wanted to do this but with dbc t.b. just never took the plunge.
Posted via Mobile Device

Blackpony · 08-15-2013, 10:05 PM

That looks cool as hell! But I would rather stay with a maf tune and not SD..

yossarian19 · 12-18-2014, 02:26 AM

I know it's an old thread, but
did anyone find a cheap / easy / crafty way to mount a standard air cleaner on the 4" OD of an LS throttle body?
I'm trying to wrap my mind around the parts / pieces available and what it would take to put a stock TB on a Victor Jr. intake, then put an air cleaner on it... My junk already runs, mind you, I just want it to look like something.

dkauffman05 · 12-18-2014, 08:01 AM

I'm headed in that direction . I've mage my bottom adapter from aluminum. Haven't got to the air cleaner adapter yet but I have some ideas soon to come.

yossarian19 · 12-20-2014, 12:24 AM

The part to adapt the 4-bolt DBW throttle onto the 4150 type flange is available on ebay.
Doesn't do me any good, using a Gen III 3-bolt throttle body, but the plate isn't too hard to make I don't think.

To get the carb type air intake onto the Gen III / Gen IV throttle body is a small trick.
The TB's are 4" O.D., most air cleaners are 5 1/8".
McMaster sells 1" long sections of 4" ID / 4 1/2" OD aluminum for under $10. If you have a lathe or a nearby and reasonable machinist, this could be turned on one side to 4 7/32" ID. Emery cloth the outside of the TB until this tube is a tight fit (but doable with a plastic hammer, say) and tap it on to the TB, leaving the lathe-turned side up & exposed 1/4 - 1/2".
Then you are just a $10 carb adapter away from running an old school intake on your LS.
I haven't measured how much meat is on the TB to see if it could be opened up for the carb adapter without the collar on it. I kind of doubt it; it would need almost 1/8" of metal to spare in the wall thickness.

The only other detail I can think of is needing some sort of support for the air cleaner stud. I guess you could cross-drill the collar & put a piece of bar across the diameter, that bar itself being drilled for the carb stud, but this is starting to sound ugly.

BR3W CITY · 12-20-2014, 07:20 PM

Maybe a few mm's if your lucky trying to bore it out. Thats why the aftermarket (i.e. Nick williams) TB's came alone. There aren't a ton of good options for the dbw 78mm TB without going to something like the xdrive (that thingy that lets u run the newer style dbw tb)

dkauffman05 · 01-08-2015, 10:41 PM

Got mine done but it'd dbc
Started with an aluminum Poston on the lathe

Done

dkauffman05 · 01-08-2015, 10:43 PM

Got mine done but it'd dbc
Started with an aluminum Poston on the lathe

Done

kvn1011 · 03-17-2015, 10:05 PM

wow!! nice job!

08-11-2013, 06:35 AM	#1
vannatta20 Registered User Join Date: Oct 2011 Location: Las Vegas, NV Posts: 291	LS carburetor intake using a stock DBW throttle body?, pls help I have an idea and want to know if its possible to do. I want to get a LS carb intake with EFI bungs and mount a stock DBW 78mm throttle body off an 2004 5.3 intake on it. Can i mount the throttle body on it like a carb? I can fab up an adapter plate. I will probably run a speed density tune so I wont need a MAF. I can then fab up a mount to house a old school air cleaner on top of it to make it look somewhat period correct. With the DBW throttle body i can retain cruise control easily. I have hptuners and can adjust most settings to get this to work. Pls help me with inputs to get this working. http://www.summitracing.com/parts/nal-88958675

08-11-2013, 07:17 AM	#2
Matt Cramer Registered User Join Date: Apr 2012 Location: Covington, GA Posts: 386	Re: LS carburetor intake using a stock DBW throttle body?, pls help There are off the shelf adapters for that purpose, but most of them have a 90 degree bend for hood clearance, like this one: http://www.summitracing.com/parts/edl-3847/overview/ Making a straight adapter should be petty easy, especially since you don't have to worry about throttle cables. You could probably just take a square of steel or aluminum plate and drill it with the appropriate bolt patterns. __________________ Matt Cramer 1972 Chevy C10 - 4.8 swap, long bed, and maybe one dent free body panel somewhere - SOLD 4.8 LS build thread

08-12-2013, 12:41 AM	#3
vannatta20 Registered User Join Date: Oct 2011 Location: Las Vegas, NV Posts: 291	Re: LS carburetor intake using a stock DBW throttle body?, pls help Found this today. Mast motorsports has done it. http://www.mastmotorsports.com/2010/...0System&id=487

08-12-2013, 01:11 PM	#4
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: LS carburetor intake using a stock DBW throttle body?, pls help wow that looks restrictive...like it needs a 102mm TB. __________________ 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

08-13-2013, 03:00 AM	#5
vannatta20 Registered User Join Date: Oct 2011 Location: Las Vegas, NV Posts: 291	Re: LS carburetor intake using a stock DBW throttle body?, pls help a 87mm throttle body flows around a 1000 cfm from what i read.

08-13-2013, 10:35 AM	#6
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: LS carburetor intake using a stock DBW throttle body?, pls help That's pretty slick. I like it. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2023 Ford Explorer ST - Twin Turbskis 2023 Ford F150 RCSB - Whipple Supercharged 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

08-13-2013, 12:26 PM	#7
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: LS carburetor intake using a stock DBW throttle body?, pls help Weird, my post disappeared. Few companies have done it, I like the idea but it also requires going with an SD tune. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

08-14-2013, 08:58 PM	#9
dkauffman05 Registered User Join Date: Jan 2008 Location: Cumming, Georgia Posts: 417	Re: LS carburetor intake using a stock DBW throttle body?, pls help WOW! Can't believe this came up . I always wanted to do this but with dbc t.b. just never took the plunge. Posted via Mobile Device

08-15-2013, 10:05 PM	#10
Blackpony Registered User Join Date: Feb 2013 Location: Aubrey, TX Posts: 308	Re: LS carburetor intake using a stock DBW throttle body?, pls help That looks cool as hell! But I would rather stay with a maf tune and not SD..

12-18-2014, 02:26 AM	#11
yossarian19 Registered User Join Date: Sep 2011 Location: Nevada City, CA Posts: 908	Re: LS carburetor intake using a stock DBW throttle body?, pls help I know it's an old thread, but did anyone find a cheap / easy / crafty way to mount a standard air cleaner on the 4" OD of an LS throttle body? I'm trying to wrap my mind around the parts / pieces available and what it would take to put a stock TB on a Victor Jr. intake, then put an air cleaner on it... My junk already runs, mind you, I just want it to look like something. __________________ "Over my head" 1957 Chevy 3200, big rear window & 6 lug. Front disc, power steering, Vortec 4.8 / 4L60E swap, hydro boost brakes & patina.

12-18-2014, 08:01 AM	#12
dkauffman05 Registered User Join Date: Jan 2008 Location: Cumming, Georgia Posts: 417	Re: LS carburetor intake using a stock DBW throttle body?, pls help I'm headed in that direction . I've mage my bottom adapter from aluminum. Haven't got to the air cleaner adapter yet but I have some ideas soon to come.

12-20-2014, 12:24 AM	#13
yossarian19 Registered User Join Date: Sep 2011 Location: Nevada City, CA Posts: 908	Re: LS carburetor intake using a stock DBW throttle body?, pls help The part to adapt the 4-bolt DBW throttle onto the 4150 type flange is available on ebay. Doesn't do me any good, using a Gen III 3-bolt throttle body, but the plate isn't too hard to make I don't think. To get the carb type air intake onto the Gen III / Gen IV throttle body is a small trick. The TB's are 4" O.D., most air cleaners are 5 1/8". McMaster sells 1" long sections of 4" ID / 4 1/2" OD aluminum for under $10. If you have a lathe or a nearby and reasonable machinist, this could be turned on one side to 4 7/32" ID. Emery cloth the outside of the TB until this tube is a tight fit (but doable with a plastic hammer, say) and tap it on to the TB, leaving the lathe-turned side up & exposed 1/4 - 1/2". Then you are just a $10 carb adapter away from running an old school intake on your LS. I haven't measured how much meat is on the TB to see if it could be opened up for the carb adapter without the collar on it. I kind of doubt it; it would need almost 1/8" of metal to spare in the wall thickness. The only other detail I can think of is needing some sort of support for the air cleaner stud. I guess you could cross-drill the collar & put a piece of bar across the diameter, that bar itself being drilled for the carb stud, but this is starting to sound ugly. __________________ "Over my head" 1957 Chevy 3200, big rear window & 6 lug. Front disc, power steering, Vortec 4.8 / 4L60E swap, hydro boost brakes & patina.

12-20-2014, 07:20 PM	#14
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: LS carburetor intake using a stock DBW throttle body?, pls help Maybe a few mm's if your lucky trying to bore it out. Thats why the aftermarket (i.e. Nick williams) TB's came alone. There aren't a ton of good options for the dbw 78mm TB without going to something like the xdrive (that thingy that lets u run the newer style dbw tb) __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-08-2015, 10:41 PM	#15
dkauffman05 Registered User Join Date: Jan 2008 Location: Cumming, Georgia Posts: 417	Re: LS carburetor intake using a stock DBW throttle body?, pls help Got mine done but it'd dbc Started with an aluminum Poston on the lathe Done

01-08-2015, 10:43 PM	#16
dkauffman05 Registered User Join Date: Jan 2008 Location: Cumming, Georgia Posts: 417	Re: LS carburetor intake using a stock DBW throttle body?, pls help Got mine done but it'd dbc Started with an aluminum Poston on the lathe Done



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03-17-2015, 10:05 PM	#17
kvn1011 Kvn1011 Join Date: May 2009 Location: kankakee il Posts: 560	Re: LS carburetor intake using a stock DBW throttle body?, pls help wow!! nice job! __________________ My Build Thead (Project Slow Motion)

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