LU5 from CFI to Carb

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Oct 10, 2013 | 01:16 PM

katrav8

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Junior Member

Joined: Mar 2013

Posts: 59

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From: Greece

Car: 1982 trans am

Engine: 4bbl carb 305 v8

Transmission: 3 auto

LU5 from CFI to Carb

I bought a trans am 1982 with an LU5 305 V8 which used to be CFI.
The previous owner changed CFI to carb using a 4BBL carb.
Now the carb has the code 17057204AYN.
How can i find how many CFM it is and if it is suitable for my engine.
If it is not suitable what is the right cfm it must have
?

Oct 10, 2013 | 01:58 PM

jwfirebird

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Joined: Aug 2002

Posts: 1,018

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From: Western NY State

Car: 87 bird

Engine: enough to break stuff

Transmission: manual th400

Axle/Gears: 4.10

Re: LU5 from CFI to Carb

decodes to 1977, regular emissions, chevy with an auto. most of those are the same about 750cfm whether they were on a 305, 350 whatever. the only special ones were on the bigger and performance engines. so to answer your question it is likely a good carb to have on your engine.

http://www.cliffshighperformance.com...carb_ID_2.html