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1991 Siverado 1500 TBI options
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r3turn0
I love my Chevy Chevette!
| Posts: 3
| Joined: 06/09
Posted: 06/21/09
11:00 PM
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Hi everyone!
1991 Chevy 1500 TBI...
Can I take off the intake and throttle body and put on some mild edelbrock heads, performer intake, and a 600 cfm carb and install a manual fuel pump in this motor and still pass emissions?
Do I need to also install compatible cam and lifters also or can I run the same cam?
Thank you. 
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85_trans_am
My first time was in a Chevy
| Posts: 240
| Joined: 05/09
Posted: 06/22/09
12:58 PM
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no it will not pass emissions with a carb. Everything on the engin needs to be oem type components.
What you can do is get the heads, intake, (and for the price of the carb) a jet prom chip and injectors. Keep the electric pump which is way better than a manual pump and you should be straight. Not to mention it will pass emissions and get more performance.
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55Guy
I mow my lawn and find Chevys
| Posts: 1027
| Joined: 07/06
Posted: 06/23/09
05:50 AM
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I've got a '92 Chevy, a head and cam upgrade will do wonders and still let you pass emissions. Something else that will help the head swap, install the TBI manifold from a '92-'95 CHevy/GMC 350 truck, along with the corresponding TBI unit. In '92 GM increased the CFM size of the TBI unit, and improved the manifold to correspond with the CFM increase.
Another option, if you've got the money, is to get one of Edelbrock's TBI to multiport EFI conversion kits for GM TBI systems. It's a direct bolt in system that uses the stock harness, and comes with an e-prom for the stock computer.
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r3turn0
I love my Chevy Chevette!
| Posts: 3
| Joined: 06/09
Posted: 06/23/09
05:59 AM
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Yea I had that as option 2 in my notes.
I guess I will get some aftermarket heads and the holly 600 cfm throttle body,
and burn a chip for it.Or maybe I should put in some headers and a cold air intake, then have the chip done.Thanks for clearing me up on the emissions thing. I kinda thought that you could not get away with it in most areas. I thought about the vortec conversion but that is a little more work than I want to do. I did not want to pull the engine or take the radiator and grill out while attempting to install a camshaft in my front yard with tools made in china LOL!
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r3turn0
I love my Chevy Chevette!
| Posts: 3
| Joined: 06/09
Posted: 06/23/09
06:15 AM
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Wow, I just seen 55guy's post pop up.
Heads and intake are easy but I have never toyed with camshaft and lifters.
I know that It would make a big diff if I put a better cam, but I heard somewhere that the ecm does some strange things when you change all that stuff.
But that is what prom burners do right?
So maybe I could do this:
tear it down, install cam-lifters-heads-92 intake-holly 600 TBI-mallory distributor-better fuel pump with a regulator-headers-cold air intake.
THEN call one of the prom burners and tell them what I have so they can burn me a new chip, boy...would I be nervous when I installed the chip and cranked it up for the first time! Is this how it should be done?
Thank you, yall have given me my first project!
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