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Attention all head porters!!!!

Posted By: Troy

Attention all head porters!!!! - 11/16/10 08:33 AM

Hi guys, hope all is well.

I have a question for you all. What grit of sanding scrolls do you use for shaping a port and what do you use for the final "lets make it look pretty."

I have been porting heads for many years with some good results but when I'm done they just don't have that professional look like the pros get. What should I use???

Thanks!!

Attached picture 6303980-Stevesengine,heads001.jpg
Posted By: BeEtLeJuIcE !

Re: Attention all head porters!!!! - 11/16/10 09:01 AM

It has been a loooong time since I have done any serious port work .. but I remember a tan-ish colored almost like hard rubber mostly in an 1/8" shank.

It would make the exh port LIKE a mirror.
Posted By: S/ST 3040

Re: Attention all head porters!!!! - 11/16/10 10:18 AM

60 grit, low RPM........but, completely unnecessary for flow/HP



Attached picture 6304005-DSCN1949.JPG
Posted By: DaKuda

Re: Attention all head porters!!!! - 11/16/10 01:11 PM

Quote:

Hi guys, hope all is well.

I have a question for you all. What grit of sanding scrolls do you use for shaping a port and what do you use for the final "lets make it look pretty."

I have been porting heads for many years with some good results but when I'm done they just don't have that professional look like the pros get. What should I use???

Thanks!!



The port on the left looks pretty good to me..
Posted By: moeflo

Re: Attention all head porters!!!! - 11/16/10 01:56 PM

There's an old wives tale about other peoples cooking always tasting better than their own. You're concentrating on the spots you aren't happy with. Another observer doesn't look at your work that way. I'd bet if you saw your own work a couple of years later and not realizing you did it, you'd wish yours looked that good.
Posted By: Stanton

Re: Attention all head porters!!!! - 11/16/10 02:53 PM



I'm not a pro welder but I make a product that I regularly display and sell at swapmeets - unpainted. Every one I make I find faults with my welding but when I get to the shows I get loads of compliments on the quality of the welding, many from welder-fabricators and I've also had numerous job offers. Yes, often we're just too critical of our own work - its a sign of pride!
Posted By: CompWedgeEngines

Re: Attention all head porters!!!! - 11/16/10 04:04 PM

The problem with porting, is people WANT to see " pretty" when its done. Its usually finished much nicer than it has to be, because people want it all glamorous. Typically you have to spend an extra hour beautifying the porting jobs.

Whats funny, and you see it all over the internet is when people say: " that porting looks killer dude" and so forth. How can someone look at a picture of a port job and know that its done right? How does it flow, where does it flow, hows the low numbers, whats the velocity and so forth. Its just like the flow numbers game. People WANT big flow numbers. It sells product. People WANT pretty port jobs, its makes the customer happy.
Again , there is a lot more to it than smooth looking ports.

My
Posted By: Troy

Re: Attention all head porters!!!! - 11/16/10 04:07 PM

That is some good advice, thank you very much.

These are some small block Edelbrock heads that I'm doing for a fried but I also have a set of aluminum Hemi heads that I will be doing for myself. I'm just trying to bring them up to the next level.

Anybody else??
Posted By: JohnRR

Re: Attention all head porters!!!! - 11/16/10 04:48 PM

Quote:

That is some good advice, thank you very much.

These are some small block Edelbrock heads that I'm doing for a fried but I also have a set of aluminum Hemi heads that I will be doing for myself. I'm just trying to bring them up to the next level.

Anybody else??



Are you displaying the heads with intake and exhuast manifolds off with mirrors and lights ???

just asking ...
Posted By: Troy

Re: Attention all head porters!!!! - 11/17/10 03:18 AM

Hi John....no light will be used, LOL!!!

As I said before, I'm just trying to get to the "next level" in my porting jobs. I have flowed many of my heads after I have messed with them and have come up with some good numbers so I know I,m on the right track.

I wonder if people use a flapper wheel, a Scott Bright type wheel or ????
Posted By: GoDartGo

Re: Attention all head porters!!!! - 11/17/10 04:21 AM

I remember the first set of BB heads I ported.
I'd just used the carbide burr,no finish work,and took
them in to get the guides done. When I get there to
pick them up, the guys says "who ported your heads?"
I almost told him I bought them that way, knowing this
guy knew what a good port job was suppose to look like.
But took a deep breath and said that I did them.
He says, "you did a good job on them" I about fell over.
Posted By: Mike Stark CFM

Re: Attention all head porters!!!! - 11/18/10 01:45 AM

I finish the chambers and EX ports with a 120 grit roll. The intake ports get finished with a 60 grit roll. This texture helps to keep the fuel in suspension by creating a boundry layer of pressure near the walls. If fuel touches the walls it will puddle and fall out of suspension. Keep the port with fuel rough and make the rest look all pretty for your customers.
Posted By: ccdave

Re: Attention all head porters!!!! - 11/18/10 06:01 AM

Quote:

I finish the chambers and EX ports with a 120 grit roll. The intake ports get finished with a 60 grit roll. This texture helps to keep the fuel in suspension by creating a boundry layer of pressure near the walls. If fuel touches the walls it will puddle and fall out of suspension. Keep the port with fuel rough and make the rest look all pretty for your customers.



Posted By: Troy

Re: Attention all head porters!!!! - 11/18/10 06:31 AM

That is the info that I'm looking for!!

Do you use a larger diameter roll....1/2" or do you like the smaller rolls like the 1/4" ones??
Posted By: MR_P_BODY

Re: Attention all head porters!!!! - 11/18/10 05:38 PM

Quote:

That is the info that I'm looking for!!

Do you use a larger diameter roll....1/2" or do you like the smaller rolls like the 1/4" ones??



I use a few different diameters so they fit the radius
at different points... 120 on the intakes and I go a
bit smoother on the exhaust
Posted By: Troy

Re: Attention all head porters!!!! - 11/19/10 03:49 AM

Thank you guys for all he useful information.

Todd, thank you for the PM. I wanted to pm you back but your mailbox is full.



Anybody else??
Posted By: CompWedgeEngines

Re: Attention all head porters!!!! - 11/19/10 04:03 AM

No problem Troy....fixed the PMs as well..thanks!
Posted By: BradH

Re: Attention all head porters!!!! - 11/19/10 03:31 PM

Quote:

I finish the chambers and EX ports with a 120 grit roll. The intake ports get finished with a 60 grit roll.


That's basically what I do, too. If an 80 gets the desired results w/ the exhaust, I don't bother going to the 120, though.

My rolls are a mix of straight & tapered 3/8" and 1/2", depending on the grit and contours I'm working with.
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