alright guys i got bored and thought maybe i could post up a how to port and polish thread.

Tools:
dremel + attachment
60 grit sanding dremel bands
120 grit sanding dremel bands
steel wheel
brass wheel
400grit sanding paper to make it smooth

all of these can be picked up at a local home depot.

a pic of the dremel with attachment


some of the stuff i used


I don't have pics of some of the first steps i took on the intake side but when i start the exsaust i'll make sure i get all the steps.

First what you want to do is get a inake gasket. Put it on the head and mark how much you need to port to match the gasket.

Then use the 60 grit to cut down all the way to that mark. Make sure you get it as even as possible all around. Cut the rest of the port to be almost even or even with the mark. If you want to port more than a gasket match then sart working on the splitter. Try to make it into a knife edge.

kinda like this






make sure whatever you do to one side you do to the other. After you're happy with the porting start polishing it with a steel wheel. Interchange to a brass after you went over the entire port with the steel.






this is what it should look like after using both wheels



Now, when you are satisfied with that... start using the 400 grit paper. Wrap the sand paper around your finger commence the fingering. Make sure to smooth out all rough spots or scratches.

And the end result should look something like this. (still not done sanding on this... fingers started to hurt


Well i just wanted to do a breif overview of what you need to do. I will be adding more info periodically.

-try not to grind on the valve guides, i did only because i will be replacing them.

1) Gasket matching is great for removing the step between the head and intake manifold.

2) Don't polish the intake ports to a mirror finish. The rough texture will help aid in tumbling of the air/fuel mixture. A mirror finish will eliminate that and the fuel can start pooling. You can polish the exhaust side if you want though.

3) Do not extend the roof or floor of the ports, you'll start losing velocity. But it's okay to remove the casting, if any.

4) For boosted and nitrous applications, hogging out the exhaust ports really does help.


update sept.23
sorry bout the picture quality. Had to use my webcam for now.












still have some cleaning up to do like scruffing the ports with some sand paper perpendicular with air flow. Then i'll move on to the exhaust ports. If all goes well, this head will go on a block that has jdM h22 pistons (12.25:1 compression with h23 head) and put stage 3 cams in.




Modified by 92bluepreludeSi at 3:28 PM 9/23/2006

 

cool! i though about doing this with an extra h23 head i have.

 

yea this is my extra h23 head, if all goes well i might put my stage 3 cams in it. But i still have a lot to do.

 

I always just dump some sand into the intake while the engine is running. It seems to polish it up just fine that way, lol.

Oh boy... I can't wait till some people actually try doing this, lol.

 

haha i bet someone would.

 

Pretty cool I've been reading up on port & polish jobs and what stuff works and what doesn't. Someday I'll probably do mine...

 

Are you essentially widening the entire length or is it just limited to the very edge where it meets the gasket?

 

widening bit by bit

 

haha "home depot" port and polish FTW!!

sorry to say it man.. but those ports look way off.. looks like you messed up a perfectly well flowing head

 

PRETTY COOL. Hey you got to start somewhere.
you will get better with each and every one.

 

I've done something similiar just polish my exhaust ports. I just wanted to take the carbon buildup off when I put my header on. I doubt that would change the flow rate of my head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mykizism &raquo;</TD></TR><TR><TD CLASS="quote">haha "home depot" port and polish FTW!!

sorry to say it man.. but those ports look way off.. looks like you messed up a perfectly well flowing head</TD></TR></TABLE>

So what do you suggest he "should" have done?

Using a dremel is similar to using an air grinder, so what's "Home Depot" about it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Finest &raquo;</TD></TR><TR><TD CLASS="quote">

So what do you suggest he "should" have done?

Using a dremel is similar to using an air grinder, so what's "Home Depot" about it? </TD></TR></TABLE>


because he stated that all these tools can be purchased from "home depot"

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92bluepreludeSi &raquo;</TD></TR><TR><TD CLASS="quote">
all of these can be picked up at a local home depot.
</TD></TR></TABLE>

first of all im not going to say what he should or shouldnt do simply because honda head porting isnt rocket science.. but it also takes a trained and experienced eye to know what to take out and know what to leave in the head..

honda heads are so well designed that taking to much out in certain areas will make the head worst off then it was stock..

and by looking at the pics.. the port work looks really bad.. and pretty much just ruined that head..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mykizism &raquo;</TD></TR><TR><TD CLASS="quote">and by looking at the pics.. the port work looks really bad.. and pretty much just ruined that head.. </TD></TR></TABLE>

If you're so skeptical on putting down his port job, then you should also know that the only indicator of a poor P&P job is to put it on a flow bench and not by "looking at it".

Also, you don't know what his plan are for this head. A boosted motor can be more forgiving when it comes to ported heads, whereas a naturally aspirated setup will be more dependant on the port job.

 

wrong, flow bench wont tell you important information as far how it will flow.. it sell you CFM and thats about it .... it helps to have that tool but a real port worker will be able to tell whats a good port job.. and whats a bad port job by looking it.. along with years of experience to support the knowlegde..

blow bench numbers are for bragging rights.. i know of two heads that one will output more cfm than the another.. but the one that didnt did not make more power than the one that didnt put high cfm numbers...

if that was the case.. then we`d all run HUGE ports all around.. all over the place then.. BIGGER is better huh?

 

So a flow bench is for bragging rights huh?

What is your experience with porting that makes you think this is a "bad" port job? What exactly has he done to mess up the ports?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mykizism &raquo;</TD></TR><TR><TD CLASS="quote">

and by looking at the pics.. the port work looks really bad.. and pretty much just ruined that head.. </TD></TR></TABLE>

okay... since you are such a professional on port and polish. Tell me what i did wrong. All i did was a gasket match and knife edged the splitter. But plz provide me with some constructive critism that will help me instead of being a complete *** and saying that the ports are bad.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92bluepreludeSi &raquo;</TD></TR><TR><TD CLASS="quote">okay... since you are such a professional on port and polish. Tell me what i did wrong. All i did was a gasket match and knife edged the splitter. But plz provide me with some constructive critism that will help me instead of being a complete *** and saying that the ports are bad.</TD></TR></TABLE>

I too wanna hear this

 

i wasnt trying to be *** what so ever... i only made the comment about homedepot which is funny to me... but since i cant see your pics anymore.. i do remember that the shapes of the ports were very irregular and not even at all..

and honestly on honda heads dont take much to ruin them.. all you really need on them is a light touch on top and bottom and remove casting flash on the sides..

 

you gotta start somewhere. How do you think he is gonna get the "trained" eye without having a starting/learning point?

if your just gonna hate and not try and help then go expletive yourself and leave this thread. there are many people including myself that would like to learn a little bit about porting heads and we dont need someone with a fathead ruining it.


this forum needs more posts like this so others can learn

 

going all crazy and knife edging the splitter is a sure chance to ruin the head man

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mykizism &raquo;</TD></TR><TR><TD CLASS="quote">going all crazy and knife edging the splitter is a sure chance to ruin the head man</TD></TR></TABLE>

ok, that tells me nothing........whats your credibility?

why is it bad to knife edge the splitter?

 

still that tells me jack ****.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mykizism &raquo;</TD></TR><TR><TD CLASS="quote">going all crazy and knife edging the splitter is a sure chance to ruin the head man</TD></TR></TABLE>

Better tell someone at RLZ Engineering that they're doing it wrong!



Taken from: http://m24x.zeroforum.com/zerothread?id=3650

 

instead of turning this into a **** fight, can we please get some valuable information in here?