89 TBI 350 in my 66....? also some parts swap questions.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hewlett2002000 · 04-06-2008, 09:52 AM

ok guys i can acquire a 89 chevy 1500 with a 350/700r4 for pretty cheap. what do yall think about putting that TBI 350 in my truck? the tranny in this truck has no reverse so i was thinking of bolting a th350 i have here up to it. would i have any problems there? also would the power steering box bolt to my frame with the regular adapter plate? would the brake booster and master bolt up? the engine it self runs strong and only needs a TPS sensor(i think, it dies when you stop, but starts right back up). i know ill need a electric fuel pump for the TBI setup, but i was thinking of trying to rig the tank from the 89 on there. anything else that would be needed please let me know.
thanks,
John

joe231 · 04-06-2008, 06:43 PM

power steering won't work without major mods, the '89 box is on the inside of the frame rail. Probably take some moddin' to use the booster also, wouldn't be a bolt on.

greg64 · 04-07-2008, 12:10 AM

I think the TBI 350 is a great swap idea. Nice simple fuel injection on that setup. The TH350 will bolt up, but you'll need to rig the kick-down cable to work with the throttle linkage on the TBI. This is different then the TV cable that would be on there right now. You'll also need a vacuum line to the tranny, but that's no big deal.

As for the stalling, it could also be the IAC idle air control motor, or possibly EGR bypassing at idle.

About the electric fuel pump, you could adapt the tank, or you could do what I did and mount an external fuel injection pump on the frame rail (so that fuel can gravity feed the pump), then plumb to the TBI and run a return line back to the tank (I tapped in to the vent hose at the tank).

Oh, and don't ignore the oxygen sensor. Without it, the ECU will run the engine in "limp home mode", which will run extra rich and use a lot of extra fuel.

billydonn · 04-07-2008, 05:14 PM

If you are truly "high-tech" you will enjoy doing the swap and benefit a lot from it. The TBI isn't that much simpler than a multi-port installation because you must use all the same sensors for it. Get the overdrive tranny fixed IMO... these systems are designed to work together. Do not cut corners on the fuel supply/return... you will be really lucky if the tank can be swapped.

Do your homework before beginning ... plan ahead... there will be costs.

www.thirdgen.org (TBI forum)
www.chevythunder.com
http://www.goingfaster.com/spo/praisetbi.html

hewlett2002000 · 04-08-2008, 01:33 AM

do you know where i can fins some wiring diagrams for the 89? i would like to see what all is involved, and what all i can cut from the harness. i knew i would have to swap the sensors. i tried to find another thread with somebody doing a similar swap but with no luck. i know ive seen a few but short of going through each one on here i cant find it. any help is appreciated.
thanks,
John

suicide 63 · 04-08-2008, 03:25 AM

heres some good links

http://www.binderbulletin.org/forums...ad.php?t=45293
http://www.persh.org/pickup/tbi-1.htm
http://www.bustedjeep.com/projects/junkyardtbi.asp
http://www.rowand.net/Shop/Tech/GMTBISwap.htm

billydonn · 04-08-2008, 05:34 AM

Suicide 63 has given you some very good stuff there. Basically the efi wiring system stands alone from the rest of your wiring... you are just adding a harness and don't have to mess with what you have- aside from power connections and grounds. You will want to dump most of the emissions, which will simplify things.

BlueJeep · 04-09-2008, 07:47 PM

Pull off the split loom and see where the wires go. It's really basic, the orange wires are hot all the time and the pink ones are hot with the ignition. The wiring harness goes two directions off the engine, toward the driver's side to the bulkhead connector (these are where you'll splice in to your existing truck harness), and off to the passenger side where it goes in to the computer. Inside the truck there is a connector that heads under the dash, that is for things such as the check engine light, the a/c controls, the ALDL connector, and the electric speedo. If you leave the EGR on you won't have to have a custom chip burned, but you might want to to maximize the potential. Overall a really basic swap. There are a lot of online resources, just search for pinouts for a GM 7747 ECM (those are the last 4 digits of the ECM part #).

hewlett2002000 · 04-10-2008, 05:16 AM

what all can be eliminated as far as emissions equipment?

joe231 · 04-08-2008, 05:13 AM

what part of texas are you in? does your '89 donor have air conditioning? if you get it, do you wanna sell me every thing for air? does it have power windows and locks? if so want to sell the doors? also need a front and rear bumper, would take the bad tranny too if you don't use it. maybe i could help you recoup some of the cost to buy it.

04-06-2008, 09:52 AM	#1
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	89 TBI 350 in my 66....? also some parts swap questions.... ok guys i can acquire a 89 chevy 1500 with a 350/700r4 for pretty cheap. what do yall think about putting that TBI 350 in my truck? the tranny in this truck has no reverse so i was thinking of bolting a th350 i have here up to it. would i have any problems there? also would the power steering box bolt to my frame with the regular adapter plate? would the brake booster and master bolt up? the engine it self runs strong and only needs a TPS sensor(i think, it dies when you stop, but starts right back up). i know ill need a electric fuel pump for the TBI setup, but i was thinking of trying to rig the tank from the 89 on there. anything else that would be needed please let me know. thanks, John __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

04-06-2008, 06:43 PM	#2
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: 89 TBI 350 in my 66....? also some parts swap questions.... power steering won't work without major mods, the '89 box is on the inside of the frame rail. Probably take some moddin' to use the booster also, wouldn't be a bolt on. __________________ *CHEVY ONLY*

04-07-2008, 12:10 AM	#3
greg64 Registered User Join Date: Dec 2007 Location: Kimberley, BC, Canada Posts: 799	Re: 89 TBI 350 in my 66....? also some parts swap questions.... I think the TBI 350 is a great swap idea. Nice simple fuel injection on that setup. The TH350 will bolt up, but you'll need to rig the kick-down cable to work with the throttle linkage on the TBI. This is different then the TV cable that would be on there right now. You'll also need a vacuum line to the tranny, but that's no big deal. As for the stalling, it could also be the IAC idle air control motor, or possibly EGR bypassing at idle. About the electric fuel pump, you could adapt the tank, or you could do what I did and mount an external fuel injection pump on the frame rail (so that fuel can gravity feed the pump), then plumb to the TBI and run a return line back to the tank (I tapped in to the vent hose at the tank). Oh, and don't ignore the oxygen sensor. Without it, the ECU will run the engine in "limp home mode", which will run extra rich and use a lot of extra fuel. __________________ Greg 64 GMC Suburban - 283, NV3500, 14 bolt 77 C10 swb - 292, SM465, 12 bolt

04-07-2008, 05:14 PM	#4
billydonn Council of the Elders Join Date: Mar 2008 Location: Omaha, NE Posts: 212	Re: 89 TBI 350 in my 66....? also some parts swap questions.... If you are truly "high-tech" you will enjoy doing the swap and benefit a lot from it. The TBI isn't that much simpler than a multi-port installation because you must use all the same sensors for it. Get the overdrive tranny fixed IMO... these systems are designed to work together. Do not cut corners on the fuel supply/return... you will be really lucky if the tank can be swapped. Do your homework before beginning ... plan ahead... there will be costs. www.thirdgen.org (TBI forum) www.chevythunder.com http://www.goingfaster.com/spo/praisetbi.html __________________ 66 C-10 Stepside 350 Tuned Port Injection Tremec TKO-600 Truck Pictures: http://community.webshots.com/user/billydonn Truck Video: http://good-times.webshots.com/video...ost=good-times Last edited by billydonn; 04-07-2008 at 05:16 PM. Reason: add link

04-08-2008, 01:33 AM	#5
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: 89 TBI 350 in my 66....? also some parts swap questions.... do you know where i can fins some wiring diagrams for the 89? i would like to see what all is involved, and what all i can cut from the harness. i knew i would have to swap the sensors. i tried to find another thread with somebody doing a similar swap but with no luck. i know ive seen a few but short of going through each one on here i cant find it. any help is appreciated. thanks, John __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

04-08-2008, 03:25 AM	#6
suicide 63 Registered User Join Date: Nov 2007 Location: peculiar mo Posts: 219	Re: 89 TBI 350 in my 66....? also some parts swap questions.... heres some good links http://www.binderbulletin.org/forums...ad.php?t=45293 http://www.persh.org/pickup/tbi-1.htm http://www.bustedjeep.com/projects/junkyardtbi.asp http://www.rowand.net/Shop/Tech/GMTBISwap.htm

04-08-2008, 05:34 AM	#7
billydonn Council of the Elders Join Date: Mar 2008 Location: Omaha, NE Posts: 212	Re: 89 TBI 350 in my 66....? also some parts swap questions.... Suicide 63 has given you some very good stuff there. Basically the efi wiring system stands alone from the rest of your wiring... you are just adding a harness and don't have to mess with what you have- aside from power connections and grounds. You will want to dump most of the emissions, which will simplify things. __________________ 66 C-10 Stepside 350 Tuned Port Injection Tremec TKO-600 Truck Pictures: http://community.webshots.com/user/billydonn Truck Video: http://good-times.webshots.com/video...ost=good-times

04-09-2008, 07:47 PM	#8
BlueJeep Registered User Join Date: Mar 2008 Location: Waukee, Iowa Posts: 1,608	Re: 89 TBI 350 in my 66....? also some parts swap questions.... Pull off the split loom and see where the wires go. It's really basic, the orange wires are hot all the time and the pink ones are hot with the ignition. The wiring harness goes two directions off the engine, toward the driver's side to the bulkhead connector (these are where you'll splice in to your existing truck harness), and off to the passenger side where it goes in to the computer. Inside the truck there is a connector that heads under the dash, that is for things such as the check engine light, the a/c controls, the ALDL connector, and the electric speedo. If you leave the EGR on you won't have to have a custom chip burned, but you might want to to maximize the potential. Overall a really basic swap. There are a lot of online resources, just search for pinouts for a GM 7747 ECM (those are the last 4 digits of the ECM part #).

04-10-2008, 05:16 AM	#9
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: 89 TBI 350 in my 66....? also some parts swap questions.... what all can be eliminated as far as emissions equipment? __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

04-08-2008, 05:13 AM	#10
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: 89 TBI 350 in my 66....? also some parts swap questions.... what part of texas are you in? does your '89 donor have air conditioning? if you get it, do you wanna sell me every thing for air? does it have power windows and locks? if so want to sell the doors? also need a front and rear bumper, would take the bad tranny too if you don't use it. maybe i could help you recoup some of the cost to buy it. __________________ *CHEVY ONLY*



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