Have a set of the explorer gt40p heads coming from a 98 explorer. My question is how much lift will these hold? Am wanting to install the trick flow stage 2 which has 540 ish int and 560 ish ex which duration no more than than 232@50 i believe
ok so the real question i guess is actually, what do i need to do to get more lift on the heads. change the springs, raise rocker arm ratio, longer valves? Anybody know
agreed the stockers are crap at best, get some crane or tfs springs, I have some cranes on mine and they work flawlessly! To increase the lift you get a bigger cam, dont get all the other crap like rockers, they dont add the power like a cam will, and plus it will sound badass!! get some headers that are specific to these heads as well mac and frpp have a great set!!