Injector to carb on my '87 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ratty 46 · 11-25-2009, 12:15 AM

I'd like some input if anyone else has done this ....

My boss just switched from a TBI factory injector, factory puter & distributor to a holley 670, edelbrock intake, MSD 6 & a basic HEI on his '90 SS454 p/u with great results. For a smog 54 it runs right along .....

I'd like to do the same BUT not change the intake. I'm not sure if the smaller runners of the TBI intake will really make that much difference than the edelbrock intake. Would a spacer assist the new carb? How much of a spacer?

Why the change? I've had the TBI off ...... replaced the injectors & am just plain tired of depending on 22 year old parts & wires ...... screw them. I can fix it on the side of the road my way. I need a bandage the factory way.

Anyone?????

Ratty 46

Greenlee · 11-25-2009, 01:55 PM

I have always been told that you have to go with a different intake.

In my opinion, it would be crazy to swap from the TBI to carb.

GMC91 · 11-25-2009, 02:14 PM

I have a 91 GMC that Ive done this too, Though I swapped motor and all, but same principle. All you need is a stock 4-bbl intake that will bolt up. Beside that it shouldnt be to hard.

Sarge261 · 11-25-2009, 02:27 PM

I want to go the other way. I would love to put a TBI or even prot injection on my 85 SBC, but I know it would cost alot.

Sarge

ratty 46 · 11-25-2009, 08:37 PM

Greenlee ..... really ...... crazy?? I have already driven the boss's truck with this conversion ..... it runs the nuts. Much better than MY truck. That is why I will contemplate the change.

Sarge ..... you want the parts when they are taken off?? Pay shipping & p/u a harness & your in.

I thought that the intake was ok but needed a spacer due to the real short runners for the injection system.

Ratty 46

cableguy0 · 11-25-2009, 09:12 PM

a carb cannot bolt to a tbi intake. its a tiny weird shaped 2 hole opening. there is not an adapter that would work and you wouldnt want to run one anyhow. you have to swap the intake out. tbi is not and was never intended for all out performance. it can run better than it does now with the current parts by having a chip burned for it. obviously a 2 barrel tiny restrictive throttle body and a crappy intake isnt going to flow like a 4bbl carb and performance intake.

joe231 · 11-25-2009, 09:56 PM

Quote:

Originally Posted by ratty 46

Sarge ..... you want the parts when they are taken off?? Pay shipping & p/u a harness & your in.

Ratty 46

oh, pick me, pick me!!

Sarge261 · 11-25-2009, 10:05 PM

I would love too but I have a small block not a big block. If Joe has a bog block and he can use it I will pass.

Thanks for thinking of me, Happy Turkey Day to you all and your families...

Sarge

ratty 46 · 11-25-2009, 11:10 PM

Hey Joe ...... I'll pass them your way if you have interest ...... same deal-e-o ...... you pay packing & shipping & they are yours!! FREE.

Ratty 46

joe231 · 11-26-2009, 12:46 AM

Sweet deal!!!
My zip is 73071
let me know how much and when

Sarge261 · 11-26-2009, 01:48 PM

Good Score Joe...Guess that makes this an even better turkey day!!

joe231 · 11-26-2009, 01:49 PM

Heck yeah!!
thanks Sarge!
and Thanks to ratty!!!!!

ratty 46 · 11-26-2009, 02:08 PM

Not an issue guys ....... I also have another set up off my bosses truck .... less the tbi. but intake & related parts, distbtr., coil, some brakets that I'll also GIVE AWAY FREE - he doesn't want it - I rescued the stuff from the dumpster.

Ratty 46

westofb · 11-26-2009, 03:48 PM

You will have to get an intake that will bolt up to your heads, the tbi motors have the 4 center bolts that go into the heads more or less straight up and down. I am sure edelbrock makes one, just have to order the right one to fit your heads.

texasfunk · 11-26-2009, 04:04 PM

Quote:

Originally Posted by westofb

You will have to get an intake that will bolt up to your heads, the tbi motors have the 4 center bolts that go into the heads more or less straight up and down. I am sure edelbrock makes one, just have to order the right one to fit your heads.

on mine in the el camino i just wallowed out the holes, and used some washers, hasnt given me a problem for 3 years

1LowToy · 11-26-2009, 05:30 PM

A friend of mine put the TBI om his 73. He had to switch fuel tanks too as the fuel pumps were in the tanks. Tanks are different from 1973 to 87. Here in California 1976-1981 are ok to work with some what, but the 1982-86 you can get a dime for due to smog regs. tha feed back carbs are #*2T. Changing from FI to a carburator in California you just made yourself a parts truck.

ratty 46 · 11-26-2009, 06:25 PM

Well ...... thank goodness I'm going the other way & I'm NOT living in Cally. The truck was bought out there but I shipped to the Atlanta area.

I'll keep you posted on the progress. I'll be ordering my parts from sumitt next week.

Ratty 46

11-25-2009, 12:15 AM	#1
ratty 46 Registered User Join Date: Jun 2009 Location: Atlanta, Ga. Posts: 1,104	Injector to carb on my '87 I'd like some input if anyone else has done this .... My boss just switched from a TBI factory injector, factory puter & distributor to a holley 670, edelbrock intake, MSD 6 & a basic HEI on his '90 SS454 p/u with great results. For a smog 54 it runs right along ..... I'd like to do the same BUT not change the intake. I'm not sure if the smaller runners of the TBI intake will really make that much difference than the edelbrock intake. Would a spacer assist the new carb? How much of a spacer? Why the change? I've had the TBI off ...... replaced the injectors & am just plain tired of depending on 22 year old parts & wires ...... screw them. I can fix it on the side of the road my way. I need a bandage the factory way. Anyone????? Ratty 46

11-25-2009, 01:55 PM	#2
Greenlee Registered User Join Date: Jun 2004 Location: El Lago, TX Posts: 1,668	Re: Injector to carb on my '87 I have always been told that you have to go with a different intake. In my opinion, it would be crazy to swap from the TBI to carb.

11-25-2009, 02:14 PM	#3
GMC91 Always trouble Join Date: Jul 2009 Location: Hartsellle, Al Posts: 1,111	Re: Injector to carb on my '87 I have a 91 GMC that Ive done this too, Though I swapped motor and all, but same principle. All you need is a stock 4-bbl intake that will bolt up. Beside that it shouldnt be to hard. __________________ 91 Silverado Regular cab, 2wd, swb-project truck 97 Silverado Extended cab, 2wd, swb-driver

11-25-2009, 02:27 PM	#4
Sarge261 Registered User Join Date: Sep 2009 Location: Upstate NY Posts: 395	Re: Injector to carb on my '87 I want to go the other way. I would love to put a TBI or even prot injection on my 85 SBC, but I know it would cost alot. Sarge __________________ 1997 GMC Yukon Western Mid Weight Plow Project THOR

11-25-2009, 08:37 PM	#5
ratty 46 Registered User Join Date: Jun 2009 Location: Atlanta, Ga. Posts: 1,104	Re: Injector to carb on my '87 Greenlee ..... really ...... crazy?? I have already driven the boss's truck with this conversion ..... it runs the nuts. Much better than MY truck. That is why I will contemplate the change. Sarge ..... you want the parts when they are taken off?? Pay shipping & p/u a harness & your in. I thought that the intake was ok but needed a spacer due to the real short runners for the injection system. Ratty 46

11-25-2009, 09:12 PM	#6
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Injector to carb on my '87 a carb cannot bolt to a tbi intake. its a tiny weird shaped 2 hole opening. there is not an adapter that would work and you wouldnt want to run one anyhow. you have to swap the intake out. tbi is not and was never intended for all out performance. it can run better than it does now with the current parts by having a chip burned for it. obviously a 2 barrel tiny restrictive throttle body and a crappy intake isnt going to flow like a 4bbl carb and performance intake. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

11-25-2009, 10:05 PM	#8
Sarge261 Registered User Join Date: Sep 2009 Location: Upstate NY Posts: 395	Re: Injector to carb on my '87 I would love too but I have a small block not a big block. If Joe has a bog block and he can use it I will pass. Thanks for thinking of me, Happy Turkey Day to you all and your families... Sarge __________________ 1997 GMC Yukon Western Mid Weight Plow Project THOR

11-25-2009, 11:10 PM	#9
ratty 46 Registered User Join Date: Jun 2009 Location: Atlanta, Ga. Posts: 1,104	Re: Injector to carb on my '87 Hey Joe ...... I'll pass them your way if you have interest ...... same deal-e-o ...... you pay packing & shipping & they are yours!! FREE. Ratty 46

11-26-2009, 12:46 AM	#10
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: Injector to carb on my '87 Sweet deal!!! My zip is 73071 let me know how much and when __________________ *CHEVY ONLY*

11-26-2009, 01:48 PM	#11
Sarge261 Registered User Join Date: Sep 2009 Location: Upstate NY Posts: 395	Re: Injector to carb on my '87 Good Score Joe...Guess that makes this an even better turkey day!! __________________ 1997 GMC Yukon Western Mid Weight Plow Project THOR

11-26-2009, 01:49 PM	#12
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: Injector to carb on my '87 Heck yeah!! thanks Sarge! and Thanks to ratty!!!!! __________________ *CHEVY ONLY*

11-26-2009, 02:08 PM	#13
ratty 46 Registered User Join Date: Jun 2009 Location: Atlanta, Ga. Posts: 1,104	Re: Injector to carb on my '87 Not an issue guys ....... I also have another set up off my bosses truck .... less the tbi. but intake & related parts, distbtr., coil, some brakets that I'll also GIVE AWAY FREE - he doesn't want it - I rescued the stuff from the dumpster. Ratty 46

11-26-2009, 03:48 PM	#14
westofb I really hate wet sanding! Join Date: Dec 2008 Location: Brookfield, MO Posts: 601	Re: Injector to carb on my '87 You will have to get an intake that will bolt up to your heads, the tbi motors have the 4 center bolts that go into the heads more or less straight up and down. I am sure edelbrock makes one, just have to order the right one to fit your heads. __________________ Jeff, 68 C-10 75 C-20, now a C-10! 10 F-150

11-26-2009, 05:30 PM	#16
1LowToy Registered User Join Date: Nov 2009 Location: Sonora California Posts: 860	Re: Injector to carb on my '87 A friend of mine put the TBI om his 73. He had to switch fuel tanks too as the fuel pumps were in the tanks. Tanks are different from 1973 to 87. Here in California 1976-1981 are ok to work with some what, but the 1982-86 you can get a dime for due to smog regs. tha feed back carbs are #2T. Changing from FI to a carburator in California you just made yourself a parts truck. Last edited by 1LowToy; 11-26-2009 at 05:33 PM.*

11-26-2009, 06:25 PM	#17
ratty 46 Registered User Join Date: Jun 2009 Location: Atlanta, Ga. Posts: 1,104	Re: Injector to carb on my '87 Well ...... thank goodness I'm going the other way & I'm NOT living in Cally. The truck was bought out there but I shipped to the Atlanta area. I'll keep you posted on the progress. I'll be ordering my parts from sumitt next week. Ratty 46



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