Carb or tbi - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ofnaman · 10-09-2007, 12:23 AM

I am debating on putting a new carb on my truck or switching to tbi. I have a 402 and have almost all of the stuff to convert to tbi. It will cost about the same either way I go, but I am still not sure. I have converted a few vehicles to fuel injection and have had really good luck with it, I am not sure why I am hesitating, but something keeps holding me back. What do you think? Thanks

extd56 · 10-09-2007, 03:17 AM

I am putting the TBI setup in my 67 and my 69 trucks. I like the looks of it and it is some what easy to do. I also still have an extra intake and computer from a 1991 Suburban that had a 454 with TBI that I sold the motor but kept the TBI and computer.

svgould · 10-09-2007, 11:07 AM

I love the tbi that I put in my, will never go back to a carb.

davidh · 10-09-2007, 12:06 PM

are you guys swapping in the whole tbi motor or just the throttle body part??

chevelle · 10-09-2007, 12:36 PM

it all depends on what you are going to do with it, if you are looking for performance the carb would usually be better but if you drive it everyday i would go with the TBI. I put a TBI and 700r4 combo in my 67 daily driver and i will never ever go back to a carb. just my 2 cents

67_C-30 · 10-09-2007, 02:06 PM

For a driver, I'd go with TBI also...

**clay68c10** · 10-10-2007, 05:59 PM

I'm totally diggin' my TBI. Way better driveability than any carb.

ProStreet68SB · 10-10-2007, 06:20 PM

if you want some performance but still want a TBI. There are a couple guys on 454ss.com the modify the 454 throttle bodies, and they flow 750+ cfm. So then you can have your cake and eat it.

67_C-30 · 10-10-2007, 07:02 PM

Quote:

Originally Posted by ProStreet68SB

if you want some performance but still want a TBI. There are a couple guys on 454ss.com the modify the 454 throttle bodies, and they flow 750+ cfm. So then you can have your cake and eat it.

You do that, or buy the Holley 670 cfm throttle body, and have the chip flashed. I put a 350 in place of a 305 TBI in '89 RS Camaro years ago. It ran really good, but the 454 throttle body is capable of more cfm if modified than the Holley 670 is. I made a phenolic spacer on a CNC mill that smoothed the transition from from the 2" butterflies on the 670 throttle to the 1.56" bores in the factory intake. The best way to go is with an aftermarket intake with the bigger bores, but mine did perform well with the spacer.

10-09-2007, 12:23 AM	#1
ofnaman Registered User Join Date: Aug 2007 Location: reno Posts: 397	Carb or tbi I am debating on putting a new carb on my truck or switching to tbi. I have a 402 and have almost all of the stuff to convert to tbi. It will cost about the same either way I go, but I am still not sure. I have converted a few vehicles to fuel injection and have had really good luck with it, I am not sure why I am hesitating, but something keeps holding me back. What do you think? Thanks __________________ A sweet 2000 Deville.....

10-09-2007, 03:17 AM	#2
extd56 Senior Member Join Date: Nov 2004 Location: Vacaville, CA Posts: 2,272	Re: Carb or tbi I am putting the TBI setup in my 67 and my 69 trucks. I like the looks of it and it is some what easy to do. I also still have an extra intake and computer from a 1991 Suburban that had a 454 with TBI that I sold the motor but kept the TBI and computer.

10-09-2007, 11:07 AM	#3
svgould Active Member Join Date: Jul 2003 Location: Boise Idaho Posts: 296	Re: Carb or tbi I love the tbi that I put in my, will never go back to a carb. __________________ 1971 SWB SOLD LT1 motor / 4l60E transmission ECE front dropped spindles with stock height springs 4" rear springs Coys Wheels 18 x 8 all the way around Hydratech hydroboost brake system

10-09-2007, 12:06 PM	#4
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,221	Re: Carb or tbi are you guys swapping in the whole tbi motor or just the throttle body part?? __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

10-09-2007, 12:36 PM	#5
chevelle instagram "footbraker67" Join Date: Apr 2007 Location: Mustang,Oklahoma Posts: 204	Re: Carb or tbi it all depends on what you are going to do with it, if you are looking for performance the carb would usually be better but if you drive it everyday i would go with the TBI. I put a TBI and 700r4 combo in my 67 daily driver and i will never ever go back to a carb. just my 2 cents

10-09-2007, 02:06 PM	#6
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: Carb or tbi For a driver, I'd go with TBI also... __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

10-10-2007, 05:59 PM	#7
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,932	Re: Carb or tbi I'm totally diggin' my TBI. Way better driveability than any carb. __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ

10-10-2007, 06:20 PM	#8
ProStreet68SB The Engine Whisperer Join Date: Sep 2006 Location: Ohio Posts: 770	Re: Carb or tbi if you want some performance but still want a TBI. There are a couple guys on 454ss.com the modify the 454 throttle bodies, and they flow 750+ cfm. So then you can have your cake and eat it.



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