Originally posted by kinger:
Its funny how you bash hybrids now, and if I pull up some posts from 2yrs ago they were the best combo to run, even though the oval ports were around then as well


Yes but 2-3 years ago I had not personally done all that extended high rpm testing either. (nor had the flow data on stock oval port heads!)

My original thinking was the hybrid's extra CR would be ideal to take advantage of a very high redline. That has obviously changed with all the data I have collected!

Also all the oiling information I have collected points to BADLY NEEDING the extra drains the 2.5L block does not have. That in itself it more than reason enough to not run a hybrid when upgrading to a 3L.

Hard data has shown that higher compression and higher rpm is not remotely worth it at all.
For instance MBT timing can be used with a normal compression ratio unlike a hybrid. MBT timing will produce the best overall power numbers every time.

Then there is the fact the stock tumble port (oval) heads out flow or equal well ported split ports. (which is the opposite of the manifolds btw)
Plus they are about $1000 cheaper verses paying for port work and valve installation!!! That's $1000 that can be much better spent elsewhere.

Even the basic oval port builds match the good hybrid builds which is just another thing showing a hybrid is not the right choice to make.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.