gt40X heads.. or gt40P?

[dstang01]

What can you guys tell me about the gt40x aluminums? Ive done some searching but cant come up with concrete info. Would these be ideal for a mild (but torquey) street setup, or would I be better of with gt40P irons? I know trickflows, edelbrocks and afrs are much more advanced than the ford gt40 series, but moneys the limiting factor here. For a daily driven street combo (consisting of the stock HO cam with 1.7s, and a cobra intake) would you recommend the X's or the P's and why?

 

[stykthyn]

the X's are superior to the p's in almost every way, they are half the weight, flow more, but they also cost a LOT more.
for the money you will spend on X heads you could get into a set of TW's.
If money is truly you deciding factor then I would stick with a set of gt40's or gt40'ps. with either head, a cobra intake and a stock cam you could easily gain at least 60hp and still retain good driveability and gas mileage.

 

[onestripevert]

if those are your only choices id go with the X
the P's have strait plugs i believe, and require specialty headers

patriot ( MY BAD )

 

[wythors]

I have the GT-40 X303's and you can check the rest of my set-up in my sig. That combo put down 257 rwhp and 295 lb/ft of torque through a stock AOD. I've now switched to a t-5 and will have it back on the dyno in late January for new numbers. I love the power and driveabillity of my car and would recommend the GT-40X's highly.

 

[dstang01]

Thanks for your comments guys, the reason Im comparing gt40Ps to the gt40Xs is because I was planning to use junkyard Ps for my setup, but I was recently offered a set of good condition used Xs for a very resonable price.. sure I could get used Ps for cheaper, but then you can never have the security with a junkyard head.. and if you want to get it ported and get nicer springs (a must) then you will probably exceed the cost of the nice Xs and still have a heavy iron head that flows equal to the aluminums.

Good flow stock.. lighter over the front end.. nice valves/springs/etc.. Im thinkin ill go with the Xs

 

[BlownFiveLiter]

If I had to choose, I'd get the X heads over the P. Aluminum, so you'll save weight, and they'll flow better. Depends on the price though.

 

[stykthyn]

if you were offered x's at a decent price I'd go that route.

 

[ninety15.0]

i would also go with the X heads if i could. They will save you weight where you need it and they do flow better than the P heads. They are a proven 270-280 rwhp head time and time again! They are well built too...good for street use!

 

[TC93]

Need to factor the machine work for the junk yard P's in, not to mention better springs. With the cost of the P's , machine work (cleaning, valve job & deck surfacing) and new springs, "How much cheaper would they really be compared to the x's?

 

[DocZG]

not to mention you can also port the Xs later on, P have little room for porting from what i understand

 

[dstang01]

Thanks guys, these are all points that I have considered, but its reassuring to hear you guys make the same points I'm definately going with the Xs, Im looking for 260-280 streetable rwhp, so I think this head is a happy medium between junkyard Ps and high dollar tfs/afr/edels