I know that porting and polishing the heads help quite a bit, but are there any heads that will fit on my 2.8mpfi that give even more performance than porting and polishing the stock heads? Either heads from another stock engine ported and polished, or aftermarket ones? What give the best performance?

 

FWD 6/60 aluminum heads, but then custom headers, the FWD intake, and many other complications.

 

think there is a company out there that was making aluminum 60* six heads, but i can't remember the name. No one on the boards was buying them however, because the price was so high, and no one knew what type of performance gains would be given...if i could only recal who made em. Could alwayz port and polish your lil' iron ones, but i don't know how well the powergain would be....614streets builds some mean lil sixes, might pm him, seeing what he'd recommend....or hopefullyhe'd respond.

 

supersix is the company that makes them with 1.8 and 1.5 valves, with porting.

Cough up 6 bills for them.

 

Not that bad of a price. It would be nice to see some dyno pulls on the 3 60* sixes though. Why buy a head that only gives as much gain as headers?

 

I'm guessing that the common concensus here is that it's not worth buying aftermarket heads and that porting and polishing and doing a valve job on my own is the way to go. Thanks for the input.:hail:

 

It really depends how much money you have, how much the head job will cost and how much power can be made. 600 dollars is probably about how much a rebuild/port/polish will cost you, (depending on location etc.).

 

someone mentioned new headers to run the aluminum heads...actually they use the same as our irons heads do as far as i can tell. bigger primaries wouldn't hurt with the aluminum heads but i think that they'll bolt up the same.

 

the intake and accesory bracket holes? Will they match up as well? I know the aluminum heads have smaller combustion chambers. Would be pretty nice to up the compression and lighten up the motor in one pass...

 

yea, i forgot to mention that the acc. mounting holes are different. that would be the biggest problem.

 

seems like a quick fix, but since those alluminum heads had a splayed valve design, that also meant that the piston had reliefs cut into it. So in order to change to aluminum heads, we'd also be swaping pistons, so also taking the bottom end apart....wouldn't be a bad idea if you were doing a rebuild, but i would think it'd be a lot of trouble, for decnet (but not incredible) gains....Any other opinions, it's just my .02

 

I belive people are installing the FWD heads w/o messing with the bottom end.

 

the FWD motors run dished pistons about the same as ours...they might be the same piston, i'm not 100% sure but i do know that there are no valve reliefs. you'd need a pretty fair amount more valve lift the need reliefs in the pistons...my domed pistons with .512" ex. lift has no problems. do no plan to switch to the aluminum heads if you plan to get a Vortex Performance turbo kit when they come out. well, let me re-phrase that...you might end up with too much compression with your stock pistons and the Al. heads to be able to run more than 7 or 8 psi of boost without detonation. check with doward though...he's done the math on it.

 

the aluminum headed motors run a much bugger dished piston. my ported iron heads with stock valves flow as much as the early 3100 heads. so there is hope for the iron heads. i have seen a big difference though on just how the valve job is done.