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Old 08-21-2014, 03:24 AM   #1
burb1085
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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?
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Old 08-21-2014, 07:16 AM   #2
BigBlocksRule
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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.
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Old 08-21-2014, 04:55 PM   #3
anubisani
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Re: Tbi to Carb bbc

Quote:
Originally Posted by burb1085 View Post
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
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Old 08-22-2014, 02:24 PM   #4
ZacharyDouglas1992
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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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1967 CHEVELLE MALIBU 427/700R4
1971 CHEYENNE 10 350/350
1983 GMC K3500 454/400/205
1987 R10 TBI 350/700R4
2014 CRUZE 2.0 TURBO DIESEL
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