What About Edelbrock 340 Heads?

1Fast340 said
Since i love to beat the dead horse.
That chamber is stupid, either get the shortblock right with a set of zerodeck pistons and adjust the head to make the desired compression and get good squish. As a nice bonus you can swap heads later on if you desire to do so on the same shortblock,it also means that if you blow up the shortblock and your heads survive you can slip a normal shortblock without stupid popup pistons under them and keep you squish.
The only acceptable reasons to run popup pistons is if you already have them or you are racing in a class that requires them. all other scenarios get a closed chamber head unless you already have a open chamber head.

Its not that they dont work,its that they are a stupid limitation for future changes .

I am almost on board with this. However, a domed piston isn’t a bad thing if you have the open chamber to go with it. Something like the old TRW slugs and a open chambered OE head or W2’s. This is actually a good combo and would rather run this o sr a flat top and closed chamber but come today, there are no big open chambered heads available.

Now I can not absolutely prove they flow better or perform better because one can argue the piston is heavier and will slow down the entire rotating mass and/or not allow it to speed up (rpm) quickly vs a lighter flat top.

I get you can re work the closed chamber to a larger easier flowing chamber BUT there is only so much material you can remove. Sorry, I can’t say exactly how much can or can not be removed. It’s to general and a loaded question.

Currently, I run the flat top slugs and closed chambered heads. It works great by me. It’s what we got these days.