well i just bought me a complete motor d16z6... i got a single head vtec on my d15 block cx.... i wanted to know if anyone knows how to port and polish willing to teach or a step by step that'll be great... i got extra parts so thats why im trying... extra head cylinder... also two extra intake manifold to mess with so .... if anyone willing to teach... im willing to learn... thanks..

 

does that head work on that block?

 

i think he's saying that he has that extra head off the cx to play with. honestly though, i've only known guys who've done port matching on the exhaust and intake ports. i don't know of anyone who has done porting or polishing themselves. but port matching... take your gasket, and make your exhaust/intake ports match the gasket, both on the head, and the manifolds... tough job, even if you can't afford to send it off to the big shops, local machine shops would normally do the job for the normal street car. it won't cost you an arm and a leg either. i'd go that route before recommending someone do their own pnp job.

 

for the most part honda heads already flow very well, so if you're gonna do anything, just polish the cast marks on the head and port match the intake and exhast manifolds. just keep in mind that it is always easier to take more off if you want, so go slow.

also maybe post before and after pics

 

just take it to the machine shop

 

dont smooth the ports out to much they are rough for a reason so the fuel atomizes and doesnt form droplets.

 

well i had an extra ex vtec head thats if you guys were wondering... but yea i think thats some help... before and after pics will help as well... but machine shop.... wat kind of shops??....

 

Porting isnt for a novice, just "taking" away meterial doesnt mean it will flow better, leave it to the pros, if you get port happy you could ruin your head, and end up losing power if you take away too much. Gasket matching isnt bad just dont go to crazy with it

 

if you really want to learn porting and polish give me a msg, menkio001 and i can get you started. You will need a eletric die grinder, i like the mikita's, basicly any die grinder that will do 25-35,000 rpm and a 1/4" collector.

 

I have a feeling a good Dremel tool would come in very handy for a DIY port match.

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So you'll lose performance if you smooth out the surfaces inside the head and IM?

 

I've done 3 LS heads, with great results, I haven't dynoed them but there is defenitly a huge difference in throttle response and towards the top end. I also went ahead and bored the TB and match the intake manifold with the head.

 

No, if you pull a y8 head for example, you will see that the castings dont line up perfectly at the divider, and along the runner walls there are several casting marks that dont line up and have some indents/lumps sticking out. Most people just suggest to smooth these out. And then instead of polishing the runners to a mirror shine, they suggest you rub it down with like 80 grit sandpaper, to scratch up the metal a bit and make it a little rough, something to do with fuel atomization and airflow.

 

I just ported mine, I never did smooth it out on either side.

But I was also told that it was a good thing,
Intake- This fuel atomazation reason
Exhaust- Supposively spins the exhaust gases, I'm going boost again so this could be beneficial.

 

^^^exhaust really dosent matter because over time it just gets caked with carbon buildup, so you can smooth it out if you want

 

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http://www.sa-motorsports.com/diyport.shtm that might help you

 

ok hey have you heard of the dremel kit??... you think that can port??.. polish i heard is alot harder... porting is wat i should learn now....

 

hey thanks thats a nice website...

 

So, when people do port matching, they increase the size of their cylinder head ports to match the intake manifold ports? The IM ports are larger diameter than the cylinder head ports? Can someone explain this to me, I'm kind of a noob when it comes to DIY performance mods...

 

Generally, the holes in the gasket are larger than both the ports in the head and the ports in the manifold. Port matching increases the ports size on both head and manifold until they are the same size and shape as the gasket.

 

Ah, I see now, I'm assuming it's the same on the exhaust side. Would it be worth it for me to do port matching on my y8? I just don't think it would be worth the time, unless the gains are noticable on my butt dyno...

 

im down to learn this too

 

If you have a spare manifold head you don't mind messing up, I'd learn on that first. I good port match + valve job can very noticable in terms of flow and throttle response.

 

I don't have that luxury. I should look into it more though... thanks for the tips!

 

i was talking to my local machinist who we've had some heads done with good success, but he said that when port matching, aftermarket IM's come with smaller ports for a reason. he made some analogy to different water squirters off a hose... smaller opening water gets squirted out faster, big opening and water flows out easier, but much slower... if your ports get too big, it creates a lazy motor... this is what the venom tech guys told us when we called them after the local machinist refused to touch our venom manifold.