port and polish a head

[marabaan]

how much more of a difference does it make if you port and polish a head

[destrukshn]

more flow?
lol.

[fatboyz39]

Port don't polish. Yes more flow.

More air + More fuel = More power. Simple.

[ACTI0NMAN-1]

creates a smoother, more direct flow and reduces turbulance in the intake and exhaust ports.

also what fatboyz39 said.

[xtercii]

why not polishing?

[ACTI0NMAN-1]

polishing should be included when porting. its just the last step.

[Slow96GSR]

You would port and polish the exhaust side and only port the intake side. This allows the air and fuel to mix better.

[XB-16-AX]

noob Q ...will u need a programable ECU to have port and polish heads?

[fatboyz39]

You would port and polish the exhaust side and only port the intake side. This allows the air and fuel to mix better.

:thumbsup::thumbsup::thumbsup::thumbsup:

[fatboyz39]

noob Q ...will u need a programable ECU to have port and polish heads?

You don't really need a programmable ECU for a ported head. But it'll be pointless to Port the head without a tunale ECU.:)

[XB-16-AX]

You don't really need a programmable ECU for a ported head. But it'll be pointless to Port the head without a tunale ECU.:)

So really the answer is YES - its better with tunable ECU..

thanks man! :thumbsup:

[aimre]

how much more of a difference does it make if you port and polish a head

No one actully answered his question.

It will make shit all diffrence, atleast for the amount of money your gonna pay.

[ginganggooly]

No one actully answered his question.

It will make shit all diffrence, atleast for the amount of money your gonna pay.

Not really. If you get the porting and polishing done the right way, it can make a massive difference. Comparing fatboyz car to mine is testament to that.

They've got a reasonably fresh ITR with bolt ons + hondata making 121kw atw. I've got a clapped out old 275k km old, low comp (b18c2) bottom end, the same bolt ons as fatboyz, but with a fresh head- ported, valve job and combustion chambers reshaped. I'm running smaller cams too. 122kw, with more power pretty much everywhere.

It'd be interesting to see my ported head running on their block...

[fatboyz39]

Yeap....at least 10kw more mid-range then us. Bastard! LOL

[aimre]

Not really. If you get the porting and polishing done the right way, it can make a massive difference. Comparing fatboyz car to mine is testament to that.

They've got a reasonably fresh ITR with bolt ons + hondata making 121kw atw. I've got a clapped out old 275k km old, low comp (b18c2) bottom end, the same bolt ons as fatboyz, but with a fresh head- ported, valve job and combustion chambers reshaped. I'm running smaller cams too. 122kw, with more power pretty much everywhere.

It'd be interesting to see my ported head running on their block...

How much is it, for the average non-connected person?

[Benson]

How much is it, for the average non-connected person?

Pm dynodave for pricing on ported head

[aimre]

^^^ maybe he can post it here so we can get an idea? as im not interested, but others might b

[defect]

and would this be more/less effective on a boosted car??

[fatboyz39]

and would this be more/less effective on a boosted car??

If your chasing HP then yes...very effective.

[TheSaint]

does it make the car rougher or smoother?

or does it just add to the i/h/e combination rawr?

[DynoDave]

How much is it, for the average non-connected person?
ginganggooly has been working with me for the last 4 odd years developing and helping me in design and allowing me to use his car as much as I needed, and yes he does get looked after but I DO NOT WORK ON HIS CAR FOR FREE he pays like everybody else.Now as far as porting goes with pricing I will not post a price up here as I look at every job as they come in and the customers power goals and budget.With our current packages we are doing just a valve job for 99% of the street engines as the customer does not want to change cams and add more compression to his engine or has the wrong intake manifold or headers to make use of the full potenial of porting so I dont see the need to take his money for something that he will never really use.I will post more up soon I would really like to see some responses from guys that have had porting done by other shops.It just comes back to what i and Toda AU have always said its all about building a combination not 1 part on its own will make a big difference,and if the B20Vtec is not sold the group of us own (Ginggangooly/ Fatboyz39/Benson/Fly/Dyno Dave)we will use that to put all these idea's into place starting with a good base platform and doing small changes at a time to show the best way to build and develop a package.
Regards Dyno Dave

[DynoDave]

With your fuel injectors close to the combustion chamber as they are now you SHOULD polish the intake area also because your only moving air not fuel and air mixture. In the old days polishing was a bad idea as you needed a little turbulence in the intake track to keep the fuel air mixture combined because fuel would fail out of suspension by forming droplets on the smooth surface traveling all the way from the carburetor. But now since you are moving just air there is no need for rough surfaces inside the intake track.

Yes it is worth it IF you have someone who knows what they are doing perform the job for you. It would give you a noticeable difference over non ported even on the street if combined with the correct size I,H,E
Good in theory but have you back to back tested your claims and not just read it on the net somewhere ?
Regards Dyno Dave

[Edgeauto]

WE had are head ported on the B20vtec when we sent it out to get welded up for the vtec conversion. Since everything was done at once i cant give any numbers but with the ITBs it seems to have worked well.

[DynoDave]

WE had are head ported on the B20vtec when we sent it out to get welded up for the vtec conversion. Since everything was done at once i cant give any numbers but with the ITBs it seems to have worked well.
What valve job was used and was it done by a shop that does V8 heads ?
Regards Dyno Dave

[Edgeauto]

What valve job was used and was it done by a shop that does V8 heads ?
Regards Dyno Dave

It has a 3 angle vave job. They do all vehicles, not sure what they specialise in but since we're in adelaide its sure not Hondas:(

[DynoDave]

It has a 3 angle vave job. They do all vehicles, not sure what they specialise in but since we're in adelaide its sure not Hondas:(
Just find out what sort of valve seat cutting machine they use and you can buy the cutters yourself and just give them to them when you want a head done it is worth it.
Regards Dyno Dave

[DynoDave]

:cool: :thumbsup:
Regards Dyno Dave

[muhhan]

When you say porting depends on the exhaust and intake do you mean the design of the intake and exhaust cams or is it referring to the actual manifold designs and how they mate with the head?

Thanks for the previous post. It was a great read, easy to understand, and very informative.

[muhhan]

Thanks! So really for any given car there are many 'correct' configurations depending on its use? Even for race cars the different sort of tracks it will be used on will make a difference to the power and torque curves that one would try to achieve? For example, the 'ideal' power setup will be different on short, tight courses as opposed to longer courses with open straights. True?

How would I get an idea of what would be suitable for my car given that it is not used for any motorsport?