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Author Topic:   porting question?
thumpin cat
Gearhead

Posts: 474
From: Santa Barbara, California
Registered: Mar 2002

posted 03-20-2003 04:34 PM     Click Here to See the Profile for thumpin cat     Edit/Delete Message   Reply w/Quote
does anyone know how exactly i could fix the bowl core shift problem on the roush 200 heads? if you could give me instructions it would be very helpful.

can it be done with cartride rolls?

thanks

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JCQuinn@work
Gearhead

Posts: 850
From: Lakewood, CO, USA
Registered: Jun 2001

posted 03-20-2003 06:07 PM     Click Here to See the Profile for JCQuinn@work   Click Here to Email JCQuinn@work     Edit/Delete Message   Reply w/Quote
I haven't worked on the Roush heads but I have used a couple thousand cartridge rolls reshaping ports. In general you want to use the rolls to blend surfaces together and smooth out the walls. If you are trying to remove specific metal without enlageing everything in the area, use a carbide burr. I recommend an olive shaped carbide because you can control exactly where it is cutting. after you have the metal shaped like you want, use the cartridge rolls to smooth out the area.

John

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kid vishus
Gearhead

Posts: 6220
From: middle of NC
Registered: Oct 2000

posted 03-20-2003 06:33 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by JCQuinn@work:
I recommend an olive shaped carbide ..
John


olive??
Is that the same shape as an oval?
Not being a smart@ss either. Just wanting to find out if that was a typo, or an actuall shape I haven't used.

I use primarily an oval, and a tree shaped carbide for all my work.

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Kellxr7
Gearhead

Posts: 646
From: Canada
Registered: Mar 2003

posted 03-20-2003 07:07 PM     Click Here to See the Profile for Kellxr7   Click Here to Email Kellxr7     Edit/Delete Message   Reply w/Quote
Arent olives oval?

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kid vishus
Gearhead

Posts: 6220
From: middle of NC
Registered: Oct 2000

posted 03-20-2003 07:12 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Kellxr7:
Arent olives oval?

Now that you mention it, I never looked at it that way before.

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Mpcoluv
Gearhead

Posts: 1299
From: Charlotte NC usa
Registered: Apr 2001

posted 03-21-2003 07:06 AM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by thumpin cat:
does anyone know how exactly i could fix the bowl core shift problem on the roush 200 heads? if you could give me instructions it would be very helpful.

can it be done with cartride rolls?

thanks

I would try to return the heads for a good set first.
If the bowl is not centered under the valve seat, you might have a hard time ever fixing it.

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