Is the stock manifold on the 305 tbi its weakness or the throttle body itself or a cobination of both? How much more cfm does the Eldebrock have over stock and could this relate to at least a 10 hp gain?

 

teh stock intake is of reasonable runner design, what it really lacks is any sign of total volume to support power efficiantly past 4000rpm. the edelbrock has a greater plenum volume so it supports power past 5200rpm. i am not sure of the exact flow numbers, but if you just look at the two of them you will see the much larger area directly under the throttle body that the edelbrock has.
the tb is not a real major restriction in the prcess, especially once the ultimate mods have been applied.

later
tim

 

the heads, exaust, lame gearing, and cam are the main reason for slow as 305 TBIs. Tim changed all those(sans the cam) and kept the stock TBI and Edelbrock TBI intake and went 14.2

 

14.2 seems pretty bad....whats sans cam mean? except the cam?

 

yep. He kept the peanut popper in there.

 

What did his car weigh at the time he turned a 14.2et?

Steve

 

He threw out everything but the kitchen sink I believe. Maybe 3200. I dunno

 

With a larger cam, something like 20X/21X @.05" , I would not be surprised if it would shave a full second off.