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-   -   Tbi to Carb bbc (https://67-72chevytrucks.com/vboard/showthread.php?t=640362)

burb1085 08-21-2014 03:24 AM
Tbi to Carb bbc
 
If switching from a factory tbi setup to carb on a 87 454 bbc, would I have to use a new cam to work with a mechanical fuel pump? I know I would have to change distributor, and add the mech. pump, is there any other changes/ parts to swap?

BigBlocksRule 08-21-2014 07:16 AM
Re: Tbi to Carb bbc
 
Head over to the 454SS website, quite a few of those guys have done the swap
I'm going the other way with a tow rig, I want to run a 4L80E and switching to TBI is the easiest way.

anubisani 08-21-2014 04:55 PM
Re: Tbi to Carb bbc
 
Quote:
Originally Posted by burb1085 (Post 6810500)
If switching from a factory tbi setup to carb on a 87 454 bbc, would I have to use a new cam to work with a mechanical fuel pump? I know I would have to change distributor, and add the mech. pump, is there any other changes/ parts to swap?
use the electric pump, that's in the tank right now, but use a regulator to lower the fuel psi use a return style rehulator

ZacharyDouglas1992 08-22-2014 02:24 PM
Re: Tbi to Carb bbc
 
X2 on using the electric pump with a regulator. If this is the next generation BBC, it wont even have the provison to mount a mechanical pump.


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