TBI swap questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bfr57 · 05-31-2008, 05:52 AM

Just picked up a complete TBI motor with all wiring and accessories. Got a few questions for you guys that have done this swap into a 67-72.

1. Where did you mount ECM? I have factory AC. I thought about glove box?
2. Where did you return the fuel at? I no longer use the original vapor canister line, can I use that?
3. I even got all the cruise control items, except switch. Anybody hook up a CC and what did you use for a switch?
4. One last question; anybody do any aftermarket upgrades to TBI to improve performance/MPG?

**clay68c10** · 05-31-2008, 06:59 AM

My ECM is under the dash on the left side near the column support.
You can use your vapor line as a return. I made a return thru my sender since my 68 doesn't have the vapor evap stuff.
As far as the cruise, that's a great idea. You'll have to check the wiring diagrams to see what kind of signals and switching the switch uses. I bet some later model tilt column switch would work. You'll also need the speed sensor from the trans and the right stop lamp switch.
As far as mileage, there are some folks making economy chips. http://www.tbichips.com/

chevelle · 05-31-2008, 03:23 PM

I put a tBI motor in my 67 and i love it. I installed my ECM right behind my glove box on top of the factory ac unit it just sat on top and the glove box held it in place, that was just a temporary place until i installed my vintage air but i never had any problems with it. I installed a blazer gas tank under the rear of mine so i cant really answer the vapor line question but it should work. I dont know about the cruise control but it sounds like a good idea to me. As for mileage, with the 700 r4 and mostly highway drivin i have been gettin around 19mpg. here are some pics of my junk.

98L150 · 05-31-2008, 06:40 PM

chevelle,

whose kit do you use, I am wanting ot do this to my 64 and would like to know how you did your tbi install

jeff

chevelle · 05-31-2008, 11:55 PM

Its not really a "kit". It was a fairly simple install. First i started out with an old school 350 block. I have a friend that has done one of these swaps before in a toyota so i got alot of the parts from him. All of the injection stuff(heads intake throttle body etc..) are factory gm parts. the Wiring harness is a painless harness and it was well worth the money, it is pretty much plug and play. I would strongly recommend a 700r4 trans with this setup because its got everything you would want, low 1st gear and overdrive and the lockup convertor is still controlled by the computer(2000 rpm at 70 mph, with 3:73 gears). the serpentine setup is not factory on the TBI units, its for a later model 5.7 vortec system. I used this setup for many reasons for one it only has three mounting bolts on each side, it looks better and the main reason was because it was FREE
if you need any help just ask, im sure if i dont know the answers someone on here does

**LockDoc** · 06-01-2008, 03:34 AM

-
Here are a few threads on the subject.. I didn't read them all but maybe you can get some info from them.

http://67-72chevytrucks.com/vboard/s...=throttle+body

http://67-72chevytrucks.com/vboard/s...=throttle+body

http://67-72chevytrucks.com/vboard/s...=throttle+body

http://67-72chevytrucks.com/vboard/s...=throttle+body

http://67-72chevytrucks.com/vboard/s...=throttle+body

http://67-72chevytrucks.com/vboard/s...=throttle+body

http://67-72chevytrucks.com/vboard/s...=throttle+body

LockDoc

oldspowered · 12-25-2008, 09:20 PM

Quote:

Originally Posted by chevelle

I put a tBI motor in my 67 and i love it. I installed my ECM right behind my glove box on top of the factory ac unit it just sat on top and the glove box held it in place, that was just a temporary place until i installed my vintage air but i never had any problems with it. I installed a blazer gas tank under the rear of mine so i cant really answer the vapor line question but it should work. I dont know about the cruise control but it sounds like a good idea to me. As for mileage, with the 700 r4 and mostly highway drivin i have been gettin around 19mpg. here are some pics of my junk.

that is one slick looking install!!!

**Boog** · 12-25-2008, 09:39 PM

.Yeah buddy! It looks like it came that way. 19 mpg ain't too bad either.

oldspowered · 11-29-2009, 01:43 PM

i have a pretty good question i'm cleaning up my 87 tbi 350 so i can paint it and install into my71 cheyenne. well my exhaust manifold are cracked and cobbled and this motor has a air diverter valve. that hooks into the egr system.
do i have to have it? will it hurt my mpg?
thanks to any advice...
David

capev86 · 11-29-2009, 01:58 PM

use the tbi from a same era 454 and hog out the small block intake to match port it. supposed to flow about as much as a q-jet. you normally don't need as much air with tbi due to the efficiency of the air/fuel mix, unless you have a bad boy engine that requires more air than a plain jane 350.

05-31-2008, 05:52 AM	#1
bfr57 Registered User Join Date: Jul 2003 Location: Tucson, AZ Posts: 106	TBI swap questions Just picked up a complete TBI motor with all wiring and accessories. Got a few questions for you guys that have done this swap into a 67-72. 1. Where did you mount ECM? I have factory AC. I thought about glove box? 2. Where did you return the fuel at? I no longer use the original vapor canister line, can I use that? 3. I even got all the cruise control items, except switch. Anybody hook up a CC and what did you use for a switch? 4. One last question; anybody do any aftermarket upgrades to TBI to improve performance/MPG?

05-31-2008, 06:59 AM	#2
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,935	Re: TBI swap questions My ECM is under the dash on the left side near the column support. You can use your vapor line as a return. I made a return thru my sender since my 68 doesn't have the vapor evap stuff. As far as the cruise, that's a great idea. You'll have to check the wiring diagrams to see what kind of signals and switching the switch uses. I bet some later model tilt column switch would work. You'll also need the speed sensor from the trans and the right stop lamp switch. As far as mileage, there are some folks making economy chips. http://www.tbichips.com/ __________________ 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

05-31-2008, 03:23 PM	#3
chevelle instagram "footbraker67" Join Date: Apr 2007 Location: Mustang,Oklahoma Posts: 204	Re: TBI swap questions I put a tBI motor in my 67 and i love it. I installed my ECM right behind my glove box on top of the factory ac unit it just sat on top and the glove box held it in place, that was just a temporary place until i installed my vintage air but i never had any problems with it. I installed a blazer gas tank under the rear of mine so i cant really answer the vapor line question but it should work. I dont know about the cruise control but it sounds like a good idea to me. As for mileage, with the 700 r4 and mostly highway drivin i have been gettin around 19mpg. here are some pics of my junk. Attached Images __________________ 1967 lwb, bigwindow, factory air (converted to Vintage Air), custom option,4.5- 6 drop, TBI injected 355, 700r4, 5 lug, daily driver. 1967 Chevelle Malibu Drag car, 355, brodix heads and intake, powerglide, 10.82 @ 123 mph 1966 chevelle malibu, Street/strip, 355, spare parts from my other chevelle, 12.82 @104 mph 1968 lwb parts truck

05-31-2008, 06:40 PM	#4
98L150 ///Relaxed Atmosphere Join Date: Apr 2003 Location: Hockley, TX Posts: 657	Re: TBI swap questions chevelle, whose kit do you use, I am wanting ot do this to my 64 and would like to know how you did your tbi install jeff __________________ 72 Suburban 64 Chevy short fleet 04 Chevy Colorado Sport Reg Cab 2012 Chevy Avalanche 2003 Chevy S10 Blazer Xtreme http://www.hubgarage.com/mygarage/RA_Jeff 64 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=295915

05-31-2008, 11:55 PM	#5
chevelle instagram "footbraker67" Join Date: Apr 2007 Location: Mustang,Oklahoma Posts: 204	Re: TBI swap questions Its not really a "kit". It was a fairly simple install. First i started out with an old school 350 block. I have a friend that has done one of these swaps before in a toyota so i got alot of the parts from him. All of the injection stuff(heads intake throttle body etc..) are factory gm parts. the Wiring harness is a painless harness and it was well worth the money, it is pretty much plug and play. I would strongly recommend a 700r4 trans with this setup because its got everything you would want, low 1st gear and overdrive and the lockup convertor is still controlled by the computer(2000 rpm at 70 mph, with 3:73 gears). the serpentine setup is not factory on the TBI units, its for a later model 5.7 vortec system. I used this setup for many reasons for one it only has three mounting bolts on each side, it looks better and the main reason was because it was FREE if you need any help just ask, im sure if i dont know the answers someone on here does __________________ 1967 lwb, bigwindow, factory air (converted to Vintage Air), custom option,4.5- 6 drop, TBI injected 355, 700r4, 5 lug, daily driver. 1967 Chevelle Malibu Drag car, 355, brodix heads and intake, powerglide, 10.82 @ 123 mph 1966 chevelle malibu, Street/strip, 355, spare parts from my other chevelle, 12.82 @104 mph 1968 lwb parts truck

06-01-2008, 03:34 AM	#6
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,423	Re: TBI swap questions - Here are a few threads on the subject.. I didn't read them all but maybe you can get some info from them. http://67-72chevytrucks.com/vboard/s...=throttle+body http://67-72chevytrucks.com/vboard/s...=throttle+body http://67-72chevytrucks.com/vboard/s...=throttle+body http://67-72chevytrucks.com/vboard/s...=throttle+body http://67-72chevytrucks.com/vboard/s...=throttle+body http://67-72chevytrucks.com/vboard/s...=throttle+body http://67-72chevytrucks.com/vboard/s...=throttle+body LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

12-25-2008, 09:39 PM	#8
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,139	Re: TBI swap questions .Yeah buddy! It looks like it came that way. 19 mpg ain't too bad either. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

11-29-2009, 01:43 PM	#9
oldspowered resto body guy Join Date: Mar 2008 Location: milford, Nebraska Posts: 128	Re: TBI swap questions i have a pretty good question i'm cleaning up my 87 tbi 350 so i can paint it and install into my71 cheyenne. well my exhaust manifold are cracked and cobbled and this motor has a air diverter valve. that hooks into the egr system. do i have to have it? will it hurt my mpg? thanks to any advice... David __________________ http://i3.photobucket.com/albums/y86...DSC_0004-2.jpg trucks are ment to haul!

11-29-2009, 01:58 PM	#10
capev86 Registered User Join Date: May 2009 Location: Eliot, Maine Posts: 1,314	Re: TBI swap questions use the tbi from a same era 454 and hog out the small block intake to match port it. supposed to flow about as much as a q-jet. you normally don't need as much air with tbi due to the efficiency of the air/fuel mix, unless you have a bad boy engine that requires more air than a plain jane 350.



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