i have try to search what kinda of horse power i would be able to gain ,if i do a match port and polish on the head for n/a and how much i would again if with single stage turbo from turbonetics
would appericate peoples opinion should i match port and polish
i have a shop the will do it for 320 for both heads

 

Yes, because I'd like to see what you're gains are for future consideration. Plus, 320 isn't a lot of money.

 

for that kind of money, why not -- hopefully the shop knows what they're doing -- FWIW, i had my heads Port matched and polished (among other things) when i had the built motor put together... figured since everything was off and tomei's were going in, why not. didn't get any before/after performance comparison -- definitely sounds and feels faster/meaner

 

not al port and polishes are the same. Is ur shop reputable? Can they test if its even worth it? Im pretty sure the Z already comes w/ a '3 way polish'

 

Absolutly,
I have never heard of no-one getting gains on Porting and polishing
this will help every facet of your engine...
Very good point though that you want to make sure the shop knows what they are doing
Also ask to see a flow chart of stock, VS what they have done to them after...to make sure it was worth it...

Just my .02..Great price too

 

alot of hidden horsepower can be had with head work. More revs, stronger valvetrain, and more power....its a win win situation. NA or FI

 

Look at the Cosworth gain in their redesigned cylinder head you will see that world class experts can stay below the $100 per horsepower gained.

 

go for it, im thinking of doing that myself!!! just need to find a reputable shop in my area that can do a good job!!!

 

Do it!!

 

a port or gasket match probably isn't going to get you much unless there's a huge mismatch at the intake to cylinder head mating. Typically your biggest gains are in the bowl area and short turn radius. You want to use someone that's worked on the head before and knows what they're doing. A simple port match and "polish" (tootsie roll cleanup) is pretty safe work and not much risk of screwing anything up but the gains can be minimal.

Also.....I don't see how a port job improves the valvetrain (mentioned above).

Has anyone seen 28" flow numbers for these heads stock? I've seen the Cosworth pic but it doesn't list what they were flowed at and the numbers seem high for a 28" measurement.

 

I know for sure it does u good I have mine done as well as every 1 is saying ur paying almost nothing just do it.... Good luck..

 

My expert that designs sprint car heads said, "Nice, not much to be gained on the intake and the exhaust could use work, but it wouldn't gain much HP either." Cam designs are the power, good valve springs manage it.

 

You should also clean up the ports on the exh. manifolds while your at it.

 

I did it. just the plenums and intake manifold. its a HUGE PITA, and take a long *** time. Do it.

 

my post refers to redoing the heads. Why would you P&P and not upgrade valvetrain while you're in there?

 

After I posted I wondered if that's what you meant (entire redo of heads). Well........lots of people might if they weren't swapping cams and there wasn't a bunch of mileage on the springs. Especially if you're doing the port work yourself. Budget concerns factor in as well.

 

yes budget do come factor

 

agreed.