jun

just wondering how much average hp gains for a 2002 max with a port and polsih

mtrai760

iTrader: (19)

First someone would have to get there 02 heads ported and polished and find out... I'm pretty sure no ones done that yet, heck, hardly any 4th gens have even done that... with the HP the 3.5L is pushing out, I'm sure the gains wouldn't be that big, but hey, that's just my opinion. If you want more info on it, check here

emax02

iTrader: (1)

He may just mean port and poilishing the intake manifold.

jun

i know this dsm mechanic in town that install turbo and fabricate pipes to go with the turbo kit. i was in his shop this morning and i ask him what can he do with my car, he told me he could port and polish the manifolds and rebore o2 housing and with this i could get at least 10 and maybe upto 15 fhp with this mod and he can fabricate a heat shield too. is this somthing to consider or just a dream

jun

i mean rebore the manifold

thay

How much was he thinking about charging for the job?

carnal_c30

iTrader: (38)

depending on how much he charges I dont really think its worth doing unless the manifold is already off the car

sleepermax

iTrader: (5)

Reboring the exhaust manifolds won't help at all - see this link.

carnal_c30

iTrader: (38)

hmm i think Don was referring to the exhaust manifold... It all depends... you might gain hp you might not its just like if you have it off the car and have some extra money to play around with then go for it... more exhaust flow and intake flow cant be bad

crazy4maxima

iTrader: (5)

.5 hp??? wtf might as well take that money in labor and get the sc, or turbo..ll.. i mean come on, the only benefits is for sc or turbo forced induciton.

Jeff92se

iTrader: (82)

What makes you think, it would do anything at all??

Dreizehn

iTrader: (4)

Are you talking heads or manifolds?

SuDZ

It could also depends on the other mods you have. I mean if you did it as your first mod probably nothing, but with other free flowing mods it could give a bit more.

SuDZ

Jeff92se

iTrader: (82)

It all depends if "port and polish" whatever that means would do anythng in the first place.

sleeper

if you pull the heads to port and polish you should do everything while you have them off, like 4 pt valve job, new cams, and port and polish. if you do the heads you should do the intake manifolds also.

Jeff92se

iTrader: (82)

This assuming you don't actually decrease the head's efficency right?

Black VQ

Right. Porting is a delicate balancing act. People think that the bigger the passages are, the better, but that's not the case. You need a balanced port that will give you useable power.