Do it yourself Port & polish.. anyone try this?

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huntnfish09

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May 10, 2005

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Jun 23, 2005

#1

• Jun 23, 2005

• #1

Has anyone here does this to their heads? any specs on Horsepower gains, time it took on what heads of course, and the company you baught your stuff from. I was thinking on the side of the dremel accessories used on GT-40 or GT-40P heads
your input is appreciated, Thanks, Adam

 

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bluray

New Member

Jun 20, 2005

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Edmonton, Alberta

Jun 23, 2005

#2

• Jun 23, 2005

• #2

I am also interested in this. If anyone has a good tutorial or how-to on home porting, let us know

 

sunil6784

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Mar 31, 2005

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Boston, MA

Jun 23, 2005

#3

• Jun 23, 2005

• #3

I've got this book that has a step by step how to.

http://www.amazon.com/exec/obidos/t...2/103-7947794-5786223?_encoding=UTF8&v=glance

 

jrichker

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Dublin GA

Jun 23, 2005

#4

• Jun 23, 2005

• #4

See http://www.diyporting.com/ for lots of good info

 

crazypete

All my crevices are greased.

Oct 22, 2004

930

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Arlington, MA

Jun 23, 2005

#5

• Jun 23, 2005

• #5

Sure, dont use a dremel on iron heads!

Great googily moogily. Took me weeks to port my gt-40p's. Burnt out 2 dremels too.

I used a rotary file, grinding stones and flapwheels and the 80 grit flapwheels produce the best in terms of polishing results. Smooth as glass. The files and stones tend to gouge the surface and scratch it up and produce uneven results. I found 40 grit sandpaper rolled into a huge tube and shoved up and down through the runners does a good job polishing them.

Make sure to port and gasket match the heads to the intake and the intake to the heads.

 

B

bluray

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Jun 20, 2005

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Edmonton, Alberta

Jun 23, 2005

#6

• Jun 23, 2005

• #6

crazypete said:

Sure, dont use a dremel on iron heads!

Great googily moogily. Took me weeks to port my gt-40p's. Burnt out 2 dremels too.

I used a rotary file, grinding stones and flapwheels and the 80 grit flapwheels produce the best in terms of polishing results. Smooth as glass. The files and stones tend to gouge the surface and scratch it up and produce uneven results. I found 40 grit sandpaper rolled into a huge tube and shoved up and down through the runners does a good job polishing them.

Make sure to port and gasket match the heads to the intake and the intake to the heads.

Click to expand...

I want to do that stuff, but I want to do it without wrecking the heads or disrupting air flow... thats why these people can charge $600-$1000 bux for a level 3 port and polish job I guess Thanks for the tips anyhow crazypete. Oh and did you dyno at all to see what the power increases were before and after the home port job?

jrichker thanks for the link to the do-it-yourself tutorial! gunna have to check that out.

 

crazypete

All my crevices are greased.

Oct 22, 2004

930

4

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Arlington, MA

Jun 23, 2005

#7

• Jun 23, 2005

• #7

Alas, I have no official numbers to show, dyno or track as the car has never seen either. I do this for fun.

That diyporting site is AWESOME. Print it out, read it twice then go to work. A dremel WILL work, but get the craftsman single speed 35K rotary tool dremel knockoff. The var speed switch is what dies on the dremels. I have abused the craftsman tool many many times more than both dremels puts together and it's still as strong as day one. The brushes are easy enough to replace though I havent even needed to do that either.

Use the flapwheel in the chamber and top of bowl, the rotary file around the valveguide and spark plug boss and the hand rolled sandpaper in the runners.

Iron is hard and porting it takes a long time. Aluminum. PSSST. Melts away. You dont even need rotary tools, sandpaper will eat it for you. I hand portmatched my eddie intake and used sandpaper and did the whole thing in 1 night including some smoothing.

 

illwood

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Apr 3, 2004

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Worcester, MA

Jun 23, 2005

#8

• Jun 23, 2005

• #8

Yeah, I used the "Standard Abrasives" DIY port kit that Summit sells on my heads on a 390. I didn't have to worry about killing a dremel tho, that's what the pneumatic die grinder is for!

I think as long as you don't go too crazy removing material, you should be fine.

 

ninety15.0

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Mar 10, 2004

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Jun 23, 2005

#9

• Jun 23, 2005

• #9

I just ordered the standard abrasives kit from jegs as well and downloaded that DIY home porting article and plan on practicing on a set of junk E6's i have layin around. once a get a couple well done ports i'll give it a try...if you do exactly what they say im sure it cant hurt...i read that most first time home porters get about 10 -15% improvement in airflow when tested on a flowbench....even 15-25 cfm would be noticable i would think...good luck

 

z2o_what

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Mar 31, 2005

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princeton, WV

Jun 24, 2005

#10

• Jun 24, 2005

• #10

now that we are on the subject..

does anyone know where i can find info on reshaping E6 combustion chambers, and unshrouding E6 valves?


edit: nevermind

 

E

emagdnim

Active Member

Feb 5, 2003

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Jun 24, 2005

#11

• Jun 24, 2005

• #11

Ill post pics this weekend of my ported 351 heads... im putting them on next month one is done so you will see a good before and after pic.