Tell me what you know about TBI - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jays68yak · 11-10-2004, 11:34 PM

Well swaping TBI into a non TBI truck to be exact.
TBI parts car is a 88 firebird.
Receiver is a 79 Blazer.

Im pulling Intake manifold and up, harness, serpintine setup, and computer. Anything else I need to grab?

*1FaastC10* · 11-11-2004, 12:35 AM

if its a 305 in the car, and a 350 in the truck, dont bother. the 305 TBI wont like the larger displacement. i would recomend a tbi setup from a truck with a 350.

jays68yak · 11-11-2004, 12:39 AM

That should at the most be the injectors tho right? Well and how the computer is programed. I was thinking about getting a 5.7 computer anyways.

BowTieMan · 11-11-2004, 01:10 AM

You wont need a whole different computer for the 350. All you need is the chip for it.

*1972C10* · 11-11-2004, 01:29 AM

I hear that 350 knock sensors ESC and a few other components are different than 305 Not sure thouh Im swapping a 305 TBI system to 350 But Im going to use either a 305 throttle body with 350 injectors Only difference is the injectors .. or a 454 TB

And like earlier stated the chip is different.

GMCLS1 · 11-11-2004, 03:41 AM

This a a good source for TBI
http://www.thirdgen.org/techbb2/show...hreadid=227281

Jason Spears · 11-11-2004, 10:12 PM

I think you'll need the calpak as well as the prom chip for the ecm. What transmission will you be running? The ECM activates the kickdown solenoid on the TH400 so you'll have to make sure the prom chip can do this. The 305 TBI will work on a 350, you just need to use the larger injectors.

jays68yak · 11-11-2004, 10:33 PM

im going to be using a th400. Ill have to read more into the kick down part but I know if all else fails I can use a manual kickdown like what would be on a carb. I know if it was a 7004r then you would need the lock up.

*1972C10* · 11-12-2004, 01:42 AM

I lucked out the Truck i pulled my harness from had a TH-375 wich is basically the same as a TH-400 so i will have kickdown based off TPS sensor If for some reason it dont act right or hold the gear long enough I can always hook up my factory kickdown .

You may be able to wire it into your computer The truck i pulled my harness from was an 89 C1500 W/T You might get a schematic for one of them.

jays68yak · 11-12-2004, 01:46 AM

Quote:

Originally Posted by 1972C10

I lucked out the Truck i pulled my harness from had a TH-375 wich is basically the same as a TH-400 so i will have kickdown based off TPS sensor If for some reason it dont act right or hold the gear long enough I can always hook up my factory kickdown .

You may be able to wire it into your computer The truck i pulled my harness from was an 89 C1500 W/T You might get a schematic for one of them.

I own a 94 so I already have a manual for those model trucks, plus one for the 87-91 TBI injected trucks.

From what im gather, Ill need to lay out the harness that I have, cut open the tape and pull all unneeded wires and sensors out of it?

*1972C10* · 11-12-2004, 01:49 AM

Yeah I dont know what sensors your going to do away with . I started taking mine apart but decided to wait untill i was ready to install it But it looked like it would pretty simple to install .

jays68yak · 11-12-2004, 01:52 AM

Well one of the 20 pages that i looked at between last night and now I thought I saw a chart with ones you could pull. I dunno. Basicly I just want to make sure I get everything out of the car before I smash it that way I dont have to track down the parts once I go to install it in my blazer.

*1972C10* · 11-12-2004, 02:12 AM

Yeah its nice to be able to have the vehicle to pick and pull every little piece needed for the swap.

jays68yak · 11-12-2004, 02:16 AM

Yeah wonder if I can fit the gauges into the blazer. hmmmmm

Anyone need any parts from an 88 firebird? Other then the TBI or the serpintine setup.

Jonboy · 11-12-2004, 10:44 AM

BTW, if you buy the calpack at the dealer, it will have the PROM on it already. Around here, there are a ton of TBI suburbans in the pick a part, and they all have the 7747 ECM and 350 Calpack in them. The same one was used from 87 to 94, and it will be in pickups, vans, suburbans, etc.

The 7747 is also a good ECM to put on a Cross Fire Injection setup to get it to work correctly, FWIW.

11-10-2004, 11:34 PM	#1
jays68yak Registered User Join Date: Oct 2002 Location: Gilroy, CA Posts: 1,454	Tell me what you know about TBI Well swaping TBI into a non TBI truck to be exact. TBI parts car is a 88 firebird. Receiver is a 79 Blazer. Im pulling Intake manifold and up, harness, serpintine setup, and computer. Anything else I need to grab? __________________ 1969 Chevy Project SWB Fleet, 20s, 5.3, t56, in the weeds. 1970 Chevy Truck cab on a 1979 Jimmy frame-8.1 liter 496 bbc/sm465/np203-jeds doubler-np205/d60/14bff Welded/42 tsls on recentered H1s 1998 Chevy Crew Cab K3500 SAS'd with hpd60, links and swayaway coilovers. 8.1l vortec DD/towrig "I like long walks, especially when they are taken by people who annoy me. "

11-11-2004, 12:39 AM	#3
jays68yak Registered User Join Date: Oct 2002 Location: Gilroy, CA Posts: 1,454	That should at the most be the injectors tho right? Well and how the computer is programed. I was thinking about getting a 5.7 computer anyways. __________________ 1969 Chevy Project SWB Fleet, 20s, 5.3, t56, in the weeds. 1970 Chevy Truck cab on a 1979 Jimmy frame-8.1 liter 496 bbc/sm465/np203-jeds doubler-np205/d60/14bff Welded/42 tsls on recentered H1s 1998 Chevy Crew Cab K3500 SAS'd with hpd60, links and swayaway coilovers. 8.1l vortec DD/towrig "I like long walks, especially when they are taken by people who annoy me. "

11-11-2004, 01:10 AM	#4
BowTieMan Registered User Join Date: Dec 2003 Location: Glendale Arizona Posts: 747	You wont need a whole different computer for the 350. All you need is the chip for it. __________________ "A true hotrodder wouldn't be content untill he had created a car so violent, so hairy, so totally sick that the very act of dropping the hammer would result in instant death. Anything less results in the need to go faster." - Tony DeFeo

11-11-2004, 03:41 AM	#6
GMCLS1 1987 GMC Sierra Classic Join Date: Feb 2004 Location: South Carolina Posts: 121	Tbi This a a good source for TBI http://www.thirdgen.org/techbb2/show...hreadid=227281 __________________ Gary L Hilton jr Last edited by GMCLS1; 11-11-2004 at 03:42 AM. Reason: hyperlink

11-11-2004, 10:33 PM	#8
jays68yak Registered User Join Date: Oct 2002 Location: Gilroy, CA Posts: 1,454	im going to be using a th400. Ill have to read more into the kick down part but I know if all else fails I can use a manual kickdown like what would be on a carb. I know if it was a 7004r then you would need the lock up. __________________ 1969 Chevy Project SWB Fleet, 20s, 5.3, t56, in the weeds. 1970 Chevy Truck cab on a 1979 Jimmy frame-8.1 liter 496 bbc/sm465/np203-jeds doubler-np205/d60/14bff Welded/42 tsls on recentered H1s 1998 Chevy Crew Cab K3500 SAS'd with hpd60, links and swayaway coilovers. 8.1l vortec DD/towrig "I like long walks, especially when they are taken by people who annoy me. "

11-11-2004, 12:35 AM	#2
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,400	if its a 305 in the car, and a 350 in the truck, dont bother. the 305 TBI wont like the larger displacement. i would recomend a tbi setup from a truck with a 350.

11-11-2004, 01:29 AM	#5
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	I hear that 350 knock sensors ESC and a few other components are different than 305 Not sure thouh Im swapping a 305 TBI system to 350 But Im going to use either a 305 throttle body with 350 injectors Only difference is the injectors .. or a 454 TB And like earlier stated the chip is different.

11-11-2004, 10:12 PM	#7
Jason Spears Registered User Join Date: Dec 2002 Location: Stoney Creek, ON Posts: 89	I think you'll need the calpak as well as the prom chip for the ecm. What transmission will you be running? The ECM activates the kickdown solenoid on the TH400 so you'll have to make sure the prom chip can do this. The 305 TBI will work on a 350, you just need to use the larger injectors.

11-12-2004, 01:42 AM	#9
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	I lucked out the Truck i pulled my harness from had a TH-375 wich is basically the same as a TH-400 so i will have kickdown based off TPS sensor If for some reason it dont act right or hold the gear long enough I can always hook up my factory kickdown . You may be able to wire it into your computer The truck i pulled my harness from was an 89 C1500 W/T You might get a schematic for one of them.

11-12-2004, 01:49 AM	#11
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	Yeah I dont know what sensors your going to do away with . I started taking mine apart but decided to wait untill i was ready to install it But it looked like it would pretty simple to install .

11-12-2004, 01:52 AM	#12
jays68yak Registered User Join Date: Oct 2002 Location: Gilroy, CA Posts: 1,454	Well one of the 20 pages that i looked at between last night and now I thought I saw a chart with ones you could pull. I dunno. Basicly I just want to make sure I get everything out of the car before I smash it that way I dont have to track down the parts once I go to install it in my blazer. __________________ 1969 Chevy Project SWB Fleet, 20s, 5.3, t56, in the weeds. 1970 Chevy Truck cab on a 1979 Jimmy frame-8.1 liter 496 bbc/sm465/np203-jeds doubler-np205/d60/14bff Welded/42 tsls on recentered H1s 1998 Chevy Crew Cab K3500 SAS'd with hpd60, links and swayaway coilovers. 8.1l vortec DD/towrig "I like long walks, especially when they are taken by people who annoy me. "

11-12-2004, 02:12 AM	#13
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	Yeah its nice to be able to have the vehicle to pick and pull every little piece needed for the swap.

11-12-2004, 02:16 AM	#14
jays68yak Registered User Join Date: Oct 2002 Location: Gilroy, CA Posts: 1,454	Yeah wonder if I can fit the gauges into the blazer. hmmmmm Anyone need any parts from an 88 firebird? Other then the TBI or the serpintine setup. __________________ 1969 Chevy Project SWB Fleet, 20s, 5.3, t56, in the weeds. 1970 Chevy Truck cab on a 1979 Jimmy frame-8.1 liter 496 bbc/sm465/np203-jeds doubler-np205/d60/14bff Welded/42 tsls on recentered H1s 1998 Chevy Crew Cab K3500 SAS'd with hpd60, links and swayaway coilovers. 8.1l vortec DD/towrig "I like long walks, especially when they are taken by people who annoy me. "

11-12-2004, 10:44 AM	#15
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	BTW, if you buy the calpack at the dealer, it will have the PROM on it already. Around here, there are a ton of TBI suburbans in the pick a part, and they all have the 7747 ECM and 350 Calpack in them. The same one was used from 87 to 94, and it will be in pickups, vans, suburbans, etc. The 7747 is also a good ECM to put on a Cross Fire Injection setup to get it to work correctly, FWIW. __________________ 1974 Jimmy- 5.3/4L80e/NP241



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