Stock TBI CFM

[justin]

Does anyone know how many cfm a tbi off a 4.3 flows? And is it any diff. from the ones that came on the 350\'s and 454\'s? If so how much more or less? Just wondering b/c I\'m prob. gonna run a 4.3 tbi on my stroker until I get the Holley Commander 950 tbi that flows 900cfm. http://www.s10v8.com/images/smilies/icon_biggrin.gif

[Koerbs]

The v-6 and sb v-8 have the same bore, but have a different part number, I think it is the spring that makes it different.

[blacks10SOL]

The injectors are different too, 5.7\'s flow way more fuel.

[BadBowtie]

the 4.3, 5.0 and 5.7 tbi are 1 and 11/16\" bore and the 7.4 (454) ones are a 2\" bore.

[tracker]

4.3 = 400 cfm

5.7 = 500 cfm

7.4 = 650 cfm

the idle circuit is also different

www.turbocity.com has modified throttle bodies and other parts

[IceQueen]

some of the high end 454 tbi units were 4 barrel units instead of the regular two barrel units used on the 4.3 and small block motors.

[Bacon101]

so would the tbi unit off of the 4.3 work on a 305??? with the same injectors??

[tracker]

yes