will the holly TBI units work on Cross-Fire Injection. i was thinking about upgrating the units. right now they are about 250cfm each. i want more. thanks

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1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
Eldebrock Headers, 1 stupid Glasspack right after the cat and dumps out before the rear axle.
Mods: 1.6 Proform Roller Rockers, electric fan.

Future mods: X-Ram( Aftermarket Cross-Fire Injection Manifold that proves to have as much power as TPI www.x-ram.com )
Cross-Fire Injection after market chip that says that it will proform like 90's injections.. http://www.turbocity.com/CorvetteCro...ECMUpgrade.htm

 

you can bore the stock CFI throttle bodies to 2" any machine shop can do this (i was quoted 17 dollars a bore)
you can get the throttle blades from Barry grant carburetor


Pablo

 

First off no the single Holley TBI units would not work without modification. One of the stock units has a FPR and the other does not as it gets feed via the other TB.

Second the stock single TBI units can be bored up to 53mm. Checkout the Vette CFI Forum there's a guy (HLWood?) who sells 2" flaps for about 4 bucks a set and he's getting 53mm flaps soon.

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1989 Camaro RS LO3 WCT5 "The Hose Queen" 0-60' 2.34 1/4 15.8@87mph
http://350.StreetRacing.org
ICQ: 61342629 AOL IM: BlackSunshineZ28

 

So, you can bore the stock OEM 1-5/8" TBI to over 2" bore, or 53mm??? Now that's ok... I did not know that.

How much can you bore an OEM 2" TBI???

 

I think it's only the single barrel TBIs that can be bored to 53mm. oh yeah it's still not a good idea to go passed 2" on the single barrel TBIs. From what I hear it's really pushin it with the 53mm flaps.

As for the SBC and BBC two barrel TBIs not a clue. I'd like to know exactly how similar they are, cuz I'd like to get my SBC TBI bored to 2".

 

oh and fastbroker if I remember correctly the stock TBI flaps are 1 11/16" either that or 1 13/16" I forget...

 

they are 1 11/16
you cant bore a two barrel tbi more than 48mm as far as i know

only cfi throttle blades can be opened up to 2"

 

Thanks guys. I totally forgot about this post. i just checked it out. Thanks again

RED82TA5.7L

------------------
1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
Eldebrock Headers, 1 stupid Glasspack right after the cat and dumps out before the rear axle.
Mods: 1.6 Proform Roller Rockers, electric fan.

Future mods: X-Ram( Aftermarket Cross-Fire Injection Manifold that proves to have as much power as TPI www.x-ram.com )
Cross-Fire Injection after market chip that says that it will proform like 90's injections.. http://www.turbocity.com/CorvetteCro...ECMUpgrade.htm
Hooker Cat-back system

 

There is really no room for boring a stock 2bbl 2" tbi. None.