[PAUL K]

The heart-shaped chamber doesn't do a lot for full throttle power. Unless you're worried about emissions or how many total degrees of timing it takes to make maximum power you won't find much of an advantage using them. Sometimes they are a disadvantage

[Cliff R]

"Am I reading this correctly.
KRE D port = 502hp/497tq @5300 heart" shaped chamber
Edelbrock 505hp/551tq "bathtub" chamber Larger cast intakes"

Steve put a link to the actual numbers. Typo on my part, the KRE heads made 502hp/560ft lbs not 502hp/497ft lbs.

Link to the dyno chart here:

https://pontiacstreetperformance.com...455MikeG2.html

[Formulajones]

Originally Posted by PAUL K

The heart-shaped chamber doesn't do a lot for full throttle power. Unless you're worried about emissions or how many total degrees of timing it takes to make maximum power you won't find much of an advantage using them. Sometimes they are a disadvantage

And I've personally seen the bathtub chambers not require a bunch of timing lead on some engines being dyno'd despite what's posted on the internet. We've had 2 in fact that made best power at just 34 degrees. I don't call that much at all and I've had heart shaped chamber engines that needed more than that.

That's why we dyno