Moparts Tech Archive

Big Block

Edelbrock BB head on BradH's Superflow

Flow isn't everything (especially on intakes), as noted when this TM-6 was only a little better than the M1 B intake at the track on my 451 CID. But good flow should be important for this years 471 CID. This was a "good" cylinder on my heads, others were a little less.

The intake flow numbers I posted from last year's tests, were out-of-the-box M1 B and TM-6, but the M1 RB was modified (not as much as this years).

Welding and porting the bolt clearance bumps on the #3,5,4,6 runners worked. It got the flow up better than the #1 runner which had no bump.

We didn't have a Perf RPM intake. We did some testing on the number 1 cylinder too, but only the TM-6 and the M1 (RB). My intake was exactly how I ran it last year. The head ports were touched this winter, but the flow was almost unchanged.

So, the combo of the head and intake flow fairly balanced together.

440Jim

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