anyone PORT there head like this
08-03-2006, 09:35 PM
#1
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anyone PORT there head like this
I want to know who has taken it to this extream... What do you think, anyone polish there exhaust side like that
intake side
intake side
08-04-2006, 02:15 AM
#2
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ive seen people with the exhaust side like glass. smoothe as it gets and exhaust flows great.. intake side should stay a little rough so that fuel can atomize
08-04-2006, 03:50 AM
#3
I think it's generally been decided that having a mirror like finish is not going really an optimal setup. It may look nice when the head is off however it will have an adverse effect on your final numbers.
Although I am not 100% familiar with why this is if I remember correctly it has to due with how the finish effects velocity and fuel atomization as it enters the combustion chamber.
If you do a search you can find some more detailed answers I am sure
Although I am not 100% familiar with why this is if I remember correctly it has to due with how the finish effects velocity and fuel atomization as it enters the combustion chamber.
If you do a search you can find some more detailed answers I am sure
08-04-2006, 04:08 AM
#4
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Re: anyone PORT there head like this (Quickgti1.8t)
About five minutes of idle will undue all that polish.Carbon will stick even to a highly polished surface.
08-04-2006, 05:03 AM
#5
Re: (kungfuSiR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kungfuSiR »</TD></TR><TR><TD CLASS="quote">I think it's generally been decided that having a mirror like finish is not going really an optimal setup. It may look nice when the head is off however it will have an adverse effect on your final numbers.
Although I am not 100% familiar with why this is if I remember correctly it has to due with how the finish effects velocity and fuel atomization as it enters the combustion chamber.
If you do a search you can find some more detailed answers I am sure</TD></TR></TABLE>
what if those are the exhaust ports
?
Although I am not 100% familiar with why this is if I remember correctly it has to due with how the finish effects velocity and fuel atomization as it enters the combustion chamber.
If you do a search you can find some more detailed answers I am sure</TD></TR></TABLE>
what if those are the exhaust ports
?
I wouldn't waste my time
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08-04-2006, 07:53 AM
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Re: anyone PORT there head like this (Quickgti1.8t)
is that a yamaha head? bikes can sometimes use the super smooth finish for their high revs and unrestricted scavenging.
08-04-2006, 09:03 AM
#9
Re: anyone PORT there head like this (NJIN BUILDR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NJIN BUILDR »</TD></TR><TR><TD CLASS="quote">About five minutes of idle will undue all that polish.Carbon will stick even to a highly polished surface.</TD></TR></TABLE>
Actually it's been proven that carbon has a much harder time adhearing to polisehd surfaces. Hence why most head porters do not produce mirror finishes.
Actually it's been proven that carbon has a much harder time adhearing to polisehd surfaces. Hence why most head porters do not produce mirror finishes.
08-04-2006, 10:37 AM
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Re: anyone PORT there head like this (rtype11)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rtype11 »</TD></TR><TR><TD CLASS="quote">is that a yamaha head?</TD></TR></TABLE> looks like a VW head.
08-04-2006, 11:09 AM
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Re: anyone PORT there head like this (SYD)
I think it looks great and they should all be done like that 
This is a controversial subject, so many people disagree with polishing mainly the intake side, for fuel atomization or I've heard some say that air "rolls" on the surface rather than "slides"..
As far as the fuel atomization arguement goes, the injectors on our (any many other) cars spray fuel basically onto the back of the intake valve, so there isn't much room for a rougher port to help atomize the fuel.
For the fluid dynamics part of this controversy, I really don't know. I mean, if you look at a golf ball, they do put those dimples on the surface so that the ball will travel farther, and it works. I'm no expert though.
This is a controversial subject, so many people disagree with polishing mainly the intake side, for fuel atomization or I've heard some say that air "rolls" on the surface rather than "slides"..
As far as the fuel atomization arguement goes, the injectors on our (any many other) cars spray fuel basically onto the back of the intake valve, so there isn't much room for a rougher port to help atomize the fuel.
For the fluid dynamics part of this controversy, I really don't know. I mean, if you look at a golf ball, they do put those dimples on the surface so that the ball will travel farther, and it works. I'm no expert though.
08-04-2006, 12:21 PM
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Re: anyone PORT there head like this (JSpin)
Looks real good man, nice detailed work
Hey can you do us a favor and post pics of the same head after some measured time of use? That might help to understand how carbon sticks to shinny surfaces, and it will give you an idea of how valuable all that work was.
Hey can you do us a favor and post pics of the same head after some measured time of use? That might help to understand how carbon sticks to shinny surfaces, and it will give you an idea of how valuable all that work was.
08-04-2006, 12:37 PM
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id say the toyota 20v 4age from the mr2 seen a few of em or a vw. Yeah that polishing looks nice take the head off 500 miles after its put on and inspect the polshing haha
08-04-2006, 12:47 PM
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My head looked like that. Key word LOOKED. You can spend as much time as you want but it will all be ruined when it get covered in carbon. The thing about not polishing the intake ports so fuel can atomize is for carburetors and it is so that fuel doesnt puddle. With 50 psi fuel pressure and 20 lbs. of boost behind that your ports can be as smooth as you want them to be.
08-04-2006, 01:13 PM
#17
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Re: (Toda Party)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Toda Party »</TD></TR><TR><TD CLASS="quote">word.. guy i know spent some serious $$ with a HT bandwagon suckoff head porting company and still made the same power on the same boost pressure lolz.
</TD></TR></TABLE>
truth hurts, bandwagons suck. turn up the boost a lbs and save $1500.
</TD></TR></TABLE>
truth hurts, bandwagons suck. turn up the boost a lbs and save $1500.
08-04-2006, 01:34 PM
#18
Re: anyone PORT there head like this (turbosi03)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbosi03 »</TD></TR><TR><TD CLASS="quote">Looks real good man, nice detailed work
Hey can you do us a favor and post pics of the same head after some measured time of use? That might help to understand how carbon sticks to shinny surfaces, and it will give you an idea of how valuable all that work was. </TD></TR></TABLE>
im sure he's just gonna do that for the benefit of HT lolol
Hey can you do us a favor and post pics of the same head after some measured time of use? That might help to understand how carbon sticks to shinny surfaces, and it will give you an idea of how valuable all that work was. </TD></TR></TABLE>
im sure he's just gonna do that for the benefit of HT lolol
08-04-2006, 04:28 PM
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Re: (abnaasefmb)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by abnaasefmb »</TD></TR><TR><TD CLASS="quote">
truth hurts, bandwagons suck. turn up the boost a lbs and save $1500.</TD></TR></TABLE>
Or do things yourself and its free.
truth hurts, bandwagons suck. turn up the boost a lbs and save $1500.</TD></TR></TABLE>
Or do things yourself and its free.
08-04-2006, 11:52 PM
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Re: anyone PORT there head like this (JSpin)
yeah its a 20v 1.8T VW head... The intake side is not polished like the exhaust side as you can see
08-04-2006, 11:54 PM
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Re: (abnaasefmb)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by abnaasefmb »</TD></TR><TR><TD CLASS="quote">
truth hurts, bandwagons suck. turn up the boost a lbs and save $1500.</TD></TR></TABLE>
people charge 4500 for a built head for my 20v head
truth hurts, bandwagons suck. turn up the boost a lbs and save $1500.</TD></TR></TABLE>
people charge 4500 for a built head for my 20v head
08-05-2006, 02:10 AM
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Re: (Quickgti1.8t)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Quickgti1.8t »</TD></TR><TR><TD CLASS="quote">
people charge 4500 for a built head for my 20v head </TD></TR></TABLE>
i've heard of people switching to a passat head i think it is. for my own curiosity, do you know anything about this?
people charge 4500 for a built head for my 20v head
</TD></TR></TABLE>i've heard of people switching to a passat head i think it is. for my own curiosity, do you know anything about this?
08-05-2006, 08:49 AM
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Re: (TGrant)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TGrant »</TD></TR><TR><TD CLASS="quote">My head looked like that. Key word LOOKED. You can spend as much time as you want but it will all be ruined when it get covered in carbon. The thing about not polishing the intake ports so fuel can atomize is for carburetors and it is so that fuel doesnt puddle. With 50 psi fuel pressure and 20 lbs. of boost behind that your ports can be as smooth as you want them to be.</TD></TR></TABLE>
Are there any articles or test to prove this? If you think about it, I can see where it makes sense, but I have seen many Supercharged V-8 cars where the intake ports are left rough also.
Are there any articles or test to prove this? If you think about it, I can see where it makes sense, but I have seen many Supercharged V-8 cars where the intake ports are left rough also.
08-05-2006, 09:24 AM
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Re: (JSpin)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JSpin »</TD></TR><TR><TD CLASS="quote">
i've heard of people switching to a passat head i think it is. for my own curiosity, do you know anything about this?</TD></TR></TABLE>
yeah the passat AEB head is much better it has to be 97-99 passat only same with the audi 1.8T... i have a 98 passat head that i will build
heres a VW 1.8T head from either jetta,golf, bettle 1.8T all have this small port
heres a audi or passat 1.8T head. Look at the diff
i've heard of people switching to a passat head i think it is. for my own curiosity, do you know anything about this?</TD></TR></TABLE>
yeah the passat AEB head is much better it has to be 97-99 passat only same with the audi 1.8T... i have a 98 passat head that i will build
heres a VW 1.8T head from either jetta,golf, bettle 1.8T all have this small port
heres a audi or passat 1.8T head. Look at the diff