We have preliminary flow numbers for the heads with the stock valves (1.86/1.46).
After adding the new bigger valves (1.94/1.55)we should gain a little more.
this has nothing to do with from above but i see ur numbers 242.88 Rwhp 232.55 Rwtq just wondering how my rwtrq is almost as much at yours but the rwhp is a huge difference...what do you have exactly
the heads made that much of hp difference but not trq ? still good tho...what are the heads ? I might be doing a Twin turbo to my car soon so idk if there will be different heads to better the turbo or it doesnt matter ?
On a 3.8 once you start really increasing the HP the torque does not increase as much. That is why I am having a 4.2 built.
It all depends on what you want out of it. There are no aftermarket heads just stock ones worked over. I will have the new 4.2 running by the end of this month so you will see the difference from a 3.8 to a 4.2.