SM Head Modifications on a budget
I can see that. And I can see a template manufacturer getting tired of the calls and complaints.
IIRC, one glaring issue was the valve job they called out. Again, off my memory if you didn’t use a basic 45 degree 3 angle valve job it screwed up the bowls which screwed up the rest of the port.
Plus, in the case of the W5 head they didn’t call out the removal of the bolt boss in the port.
You can see on a flow bench that area of pinch is shoving the air across the port to the guide. String showed it so clear Ray Charles could see it happening.
Chrysler said don’t remove it, as it speeds up the air right there!!! That was a WTF moment for sure. I almost asked for a clarification but I declined to care what that dude said any more.
There was some other stuff too. Valve size is one of them. I can’t think of a single instance where I’d use a 2.02 valve in a W2 or 5 head. Ever.
I was looking to do 2.125 or even 2.150 if I didn’t have to move the guides.
So yeah, porting templates may work for basic stuff but if you are going to leave the 2.02 valve in a W2 or 5 head I’d but Trick Flows instead.
It’s a waste of the head.