Are Speedmaster Heads Good? I've Heard a Lot of Bad Press on Edelbrock 340 Heads Lately

pittsburghracer said

@73smallblock switched from unported Speedmaster heads to cnc ported TrickFlow heads and hopefully he will step in but I think he picked up .30.

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33IMP said

No, thats an amazing improvement from a head swap, at that performance point! 50 hp maybe. 75 maybe too.

Edit: Wallace says a 500hp/3000lb/7.07 goes to 600hp/3000lbs/6.65.
If you got that JUST from a head swap... those speedmasters must have been garbage!

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Let's see, Unported Speedmasters out of the box to CNC Ported Trick Flows. The Speedmasters are 1 small step better than OOTB Edelbrock's and ported Trick flows are a step away from W2's. They better give you 50 horsepower on an engine like that. That's a big jump in heads.