Can I get my heads Port and Polished and still use my stock intake? If so much would that cost and does anyone know a good place to get it done, pref in NC?
Can I get my heads Port and Polished and still use my stock intake? If so much would that cost and does anyone know a good place to get it done, pref in NC?
its not worth it to get stock heads ported and polished. the labor and work involved would fall maybe a few hundred short of newer and better PI heads and intake.
its not worth it to get stock heads ported and polished. the labor and work involved would fall maybe a few hundred short of newer and better PI heads and intake.
its not worth it to get stock heads ported and polished. the labor and work involved would fall maybe a few hundred short of newer and better PI heads and intake.
I was referring to my first post on 7/16 where I had
incorrectly claimed PI heads were better, and then you
initiated the straightening out process.....
As I learned, there are casting changes in the non-PI head that will allow for use of high lift cams on the later head, but not on the early head. I've seen a photo of a 1997 non-PI MN12 4.6L head with '01 PI cams and you must do something with the valve springs or there will be little to NO clearance at the high rpms. What does that mean to you...valve float and overlap. I talked with the person who has these heads and cams and we agreed by 5,500 rpm you'd have trouble. Ok, no big deal, you buy better valve springs and go with a better valve as well. That costs money though which adds to your overall cost.
A completely assmebled PI head with cams, springs and valves costs $850.00 or so for the pair. A non-PI head from '97 or '98 will require NEW cams (custom or PI). That means $$$$. You'll need some type of valve spring capable of handling the lift. That means $$$$. Then you have to port and polish the non-PI heads. Have them shipped to and from the shop...$$$$. Mager told us it costs $600.00 for just labor. So in the end, you have the same cost of a PI head (with a full assy). The difference is, the PI heads are ready to install, PLUS you could still have them ported on top of that (to flow more than the non-PI with full CNC porting). Those non-PI's are done.
Some of "those guys" who claim this works (to port non-PI heads) with great results are getting the parts and labor for under the cost that you and I would pay. So you look at what I laid out for you. Soak it in and figure out what is better for you.
A-Train LIKES coming in stealth (it's that counter culture
attitude) and ripping us other posters a new.....well, you
get the idea.....and that's okay, it's somtimes painful,
butt you always....ah, end up with more or better info than you
had before......LOL
It's always nicer to get the info from a well stocked "library"
than from "advice" colums...... Goes for you too Seabass...
A-Train..I did a bit of checking a little while back..call Dan if you'd like to verify...
The '96-up STOCK valve springs are identical to the '99-up PI springs.Same part number,and the number had not been changed according to Dan.The '94-'95 uses a different part number.
JL
Never said that..but it's the same spring,and the same cam...and there is apparently not going to be a problem.It's is a bit worrisome looking at the spring compressed like that,but like I said..it's the same cam,and the same spring used in '99-up,so if you're running the PI heads..you've got the same hardware in your engine.
JL
what's the most cost effective approach for the street or
sreet/strip person? Would a Fox Lake Stage I job, including
3 angle valve job for durability and better flow, with the
stock springs, on a set of PI heads, with stainless valves
optional, be a sensible way to go?
I realize you won't get the same gains as the high end CNC
$2100 set like Seabass is doing, but would this more basic
set still provide reasonably cost effective power gains?
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A forum community dedicated to Ford Thunderbird, Mercury Cougar and Lincoln Mark owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!
Goes for you too Seabass...
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