How would you rate this port work?`

[all_motor_mike]

thats done with 60 grit cartridge rolls sir.


mike

 

[DSMunknown]

Looks good Mike. Real good.

 

[Freerevving]

thats done with 60 grit cartridge rolls sir.


mike

yes good job

...my lowest grit was 80 on the cartridge rolls... didn't quite have that texture... On the intake, I finish off with 80 and then a quick pass with the scotch pad ball... still has the texture but the peaks are not as high... looks kinda shiny too

currently fixing the 5cfm difference on the cyclone manifold... and then some

Since you're good at porting I want to ask... why didn't you hit the short side radius?

 

[all_motor_mike]

yes good job

...my lowest grit was 80 on the cartridge rolls... didn't quite have that texture... On the intake, I finish off with 80 and then a quick pass with the scotch pad ball... still has the texture but the peaks are not as high... looks kinda shiny too

currently fixing the 5cfm difference on the cyclone manifold... and then some

Since you're good at porting I want to ask... why didn't you hit the short side radius?

i cleaned them up, u cant see it from the pics so why do u say that?


mike

 

[all_motor_mike]

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yeah dont mind the valve job.......... i did the port work and then i give it to my boss so his buddy could do the VJ and we get it back with 2 angle intake cuts and exhaust cuts that were done with freakin stones!................. who the hell uses stones now adays??? come on man! needless to say hes not doing any of my heads any more.............. it should look something like this........

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mike

 

[Freerevving]

i cleaned them up, u cant see it from the pics so why do u say that?


mike

I'm still amazed at your finish and consistency! especially in the combustion chambers! I guess you used a mill right?

Nice job... okay I see you cleaned them up Just was wondering why you didn't knock em down... there's a few extra horses in it
sorry about the blurry pictures

 

[Freerevving]

wait sorry was looking at your intake ports... I see you did knock em down pretty good

oh well, whored out some photos

 

[all_motor_mike]

wait sorry was looking at your intake ports... I see you did knock em down pretty good

oh well, whored out some photos

knock what down? the guides and bosses? and no mill is used all is done by hand.


mike

 

[Freerevving]

knock what down? the guides and bosses? and no mill is used all is done by hand.


mike

No the short side radius

 

[Slippi84]

Mike runs shit when it comes to fabricating and what not He did the same shit on his manifolds. He currently makes the best manifold you can buy for a 420a hands down. If I didn't buy my head already ported he would have been the one to do it.

 

[all_motor_mike]

Mike runs shit when it comes to fabricating and what not He did the same shit on his manifolds. He currently makes the best manifold you can buy for a 420a hands down. If I didn't buy my head already ported he would have been the one to do it.

thank u sir



mike

 

[Freerevving]

I've seen a lot of port work... and my port work is better than 99% of what I see.... but, especially after seeing his chamber work, I must admit Mike is better than me

 

[all_motor_mike]

I've seen a lot of port work... and my port work is better than 99% of what I see.... but, especially after seeing his chamber work, I must admit Mike is better than me

that chamber work would look alot better if it had a better valve job u know.......... here is a worked chambere with serdi valve job.............

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mike

 

[newdsmtnr96]

Doesn't look like any one did a gasket match, Can i ask why? I did one on my 420a.. Full port had a flow bench tho. Gained a ton of cfm

 

[EVIL EAGLE RT]

heads on a 4g are fine the way they are, i majored in hp engine building and just got done doing some head work to mine, i did very little work to mine, you only want to port out areas where the air gets caught up and you want to try to control it, on a stock head if you flip it over and look into the seats feel down past the seat, the is a triangle top there that is the biggest part to go at i just round it off so the air flows nicely, the other spot the worked on was i raised the roof on the ex side so when air shot up out of the valves the first place it hits is the roof no mine works into the roof and begine the tumble flowing faster and more air straight into the manifold, bottom line is do little work and control the air, too much the air will just hang out and slowly move out

 

[newdsmtnr96]

Not saying your wrong. but where i worked "machine shop" the idea was to make as much cfm as possable. Being turbo charged the pressure of the air would move all the air into the head, with porting out the runners as much as you can and the exhaust and flowing it you can gain alot of full port jobs. Doing a gasket match would open up the combustion chamber to the max size of your head gasket. But your probably right.

 

[gsxitement]

As a general rule of thumb, you don't usually touch the bottom of the port. Generally you raise the roof of the port, that way the air has a larger turning radius. Additionally, you don't wan't the ports to be excessively large. That kills port velocity, which kills the VE of the engine.

100% I've ported many heads, and it's not so much the size but the shape. That port job is not too good.

 

[Clutch GSX]

The point of a port job is to get as big as possible without going too big. It's like a straw. If the straw is too thin then it is hard to suck up a lot of liquid but if it is too big you need a lot of sucking power to suck up liquid. The straw should be as big as possible based on the sucking power (Turbo flow). The bigger the turbo, the bigger the ports can go. Shape is just as important for free flowing gasses.

And yeah the OP: That port job is not good at all. Uneven, rough, way too big and it definately is going to lose power over stock.

 

[JesterJess]

The point of a port job is to get as big as possible without going too big. It's like a straw. If the straw is too thin then it is hard to suck up a lot of liquid but if it is too big you need a lot of sucking power to suck up liquid. The straw should be as big as possible based on the sucking power (Turbo flow). The bigger the turbo, the bigger the ports can go. Shape is just as important for free flowing gasses.

I can't disagree more! The idea of a port job is NOT to get as big of a port as possible. The idea is to get the intake charge to move fast. An ideal port would be a slight V, and not | |.... By "funneling" the intake charge down, you will pick up charge velocity. Charge velociy is much more importang the charge volume. What i'm getting at is that a huge port is a slow port (which means less horsepower.) A properly shaped port may be smaller but will flow more air, at a much higher velocity.

Hey, ClutchGSX.... Any chance you are the guy that did this "stellar" port workk for the OP???? Do us all a favor, please sell all of your portworking tools!

 

[rEclipserGST]

ok i had a head ported its a bare head its ben ported to match the intake and exhaust manifold gaskets tell me what you guys think of this

How much did you pay for this "porting"? Who "ported" it? What tools did they use to "port" it?

 

[Clutch GSX]

I can't disagree more! The idea of a port job is NOT to get as big of a port as possible. The idea is to get the intake charge to move fast. An ideal port would be a slight V, and not | |.... By "funneling" the intake charge down, you will pick up charge velocity. Charge velociy is much more importang the charge volume. What i'm getting at is that a huge port is a slow port (which means less horsepower.) A properly shaped port may be smaller but will flow more air, at a much higher velocity.

Hey, ClutchGSX.... Any chance you are the guy that did this "stellar" port workk for the OP???? Do us all a favor, please sell all of your portworking tools!

Maybe you should reread my post. I specifically said that the point is to make the ports as big as possible without going too big. The limit of "too big" is based on the turbos flow rating. Some turbo's don't need any expansion of the ports and turbos like the gt42 should be expanded. Here is a picture of my port work for a 56 trim. Maybe you should make sure you comprehend the post before flaming.

<a href="http://smg.photobucket.com/albums/v336/vtown661/?action=view&current=IMG_2004.jpg" target="_blank"><img src="http://img.photobucket.com/albums/v336/vtown661/IMG_2004.jpg" border="0" alt="Photobucket"></a>

<a href="http://smg.photobucket.com/albums/v336/vtown661/?action=view&current=IMG_2001.jpg" target="_blank"><img src="http://img.photobucket.com/albums/v336/vtown661/IMG_2001.jpg" border="0" alt="Photobucket"></a>

<a href="http://smg.photobucket.com/albums/v336/vtown661/?action=view&current=IMG_2009.jpg" target="_blank"><img src="http://img.photobucket.com/albums/v336/vtown661/IMG_2009.jpg" border="0" alt="Photobucket"></a>

 

[JesterJess]

The limit of "TOO BIG" has very little to do with the amount of air that your turbo will flow. It has more to do with keeping charge velocity UP and increasing efficiency. Just cause a port is BIG does not mean that it is efficient! I understand what you said, I just think you went about saying it in the wrong way. Your way of stating it, leads people to believe that I can take my head, port it just short of the water ports, and because it is BIG, it will flow massive quantities of air. This is not true. There are many different variables to porting a head. I would not jump on here and pretend to know the ins and outs to doing this (we already have a couple here that have stellar work to proove it,) but I do know when someone is saying something that can be misleading or false.

I'm not trying to start a fight, just stating the obvious.

 

[newdsmtnr96]

not commenting any more ha . I agree tho. Don't want to start a fight too.

 

[Clutch GSX]

The limit of "TOO BIG" has very little to do with the amount of air that your turbo will flow. It has more to do with keeping charge velocity UP and increasing efficiency. Just cause a port is BIG does not mean that it is efficient! I understand what you said, I just think you went about saying it in the wrong way. Your way of stating it, leads people to believe that I can take my head, port it just short of the water ports, and because it is BIG, it will flow massive quantities of air. This is not true. There are many different variables to porting a head. I would not jump on here and pretend to know the ins and outs to doing this (we already have a couple here that have stellar work to proove it,) but I do know when someone is saying something that can be misleading or false.

I'm not trying to start a fight, just stating the obvious.

Yes well I was obviously speaking in very general terms using an analogy so people that don't have extensive knowledge (Like the OP) could get a better grasp on why bigger isn't better. I did not say that making a big port was the only factor. Here's my quote, "Shape is just as important for free flowing gasses." You're making a straw man argument here. I don't know what you're reading but I never said that just because a port is big it is more efficient. I never said that porting it bigger makes it better. I actually said the opposite... Sorry if my analogy was hard to understand. Maybe others found it to be more helpful than technical lingo. I'll summarize so no one gets confused. Bigger is not always better. The appropriate port volume depends on how much flow your engine will be seeing (turbo flow). There are many other factors involved in porting such as materials of components and good aerodynamic properties (Smooth transitions, port shape, etc) that are necessary to increase efficiency and charge velocity. All of these things will allow for more flow which is the main goal of porting and valve jobs. Bigger ports allow for more air to move, better aerodynamic properties allow for the air to flow more efficiently. More flow = More air = more power. Hopefully this clears everything up for everyone.