Indy 360-1 vs Edelbrock RPM heads
Thanks for the information Rumblefish, This is the kind of info I am looking for.
We don't mind spending the extra bucks on the Indy's, as long we can build a reliable solid and 550hp to 600hp engine, that can handle plenty of 1/4 mile passes.
We learned our lesson using the former Procomp heads...
I just took my Big Mouth heads out of the closest to bring to Charlie Servedio’s SF-600 bench. He will have the video up later. I don’t know exactly when. He is doing a set of Magnum heads right now while I have a smoke break. Then a video for that head.
Check back at his channel for the video when he posts it up for more information and a little flowing around.
https://m.youtube.com/@servediocylinderheads
We spent the morning flow testing 600-AFB mods. We just got done with the heads.
Now I don’t like to race flow bench numbers due to various conditions and factors that can’t be controlled. It’s easy to say, if he calibrated his bench why didn’t match my bench and why is guy #3 have even a different set of numbers? I’ve had my W5’s flow tested 3 different times on the same bench model in 3 different locations by the 3 different people flowing them telling me what the flow plate size is with that being the only different factor. A 4.185 plate, a 4.03 plate and a 4.06.
What’s the point? A cylinder head will flow differently on different bore sizes. The larger the bore size, the more air the head flows. The computer should make corrections but just how flexible the program is I don’t know.
What it did show is the flow curves which all had a certain amount of spread between them about equal to their bore size. This is what you really need to know. How big the the flow plate is and what the curve looks like. The cfm amount goes up with the bigger bore and if the test was on a 4.185, how does that compare to your 4.03?
Head dependent, it can be a little, it can be a lot. On top of that, if the operator thinks his bench is doing the right thing and it’s not, let’s say 3% stingy and the other bench is 3% happy, that’s a lot between them.