exhaust port bumps on 200ci head

so when i stick my finger in the exhaust holes on the head, about 2.25 inches in i feel a big bump. what are they? has anybody ground them out?

Yes I am porting my 250 head now and grinding them out, actually they are on the intake.

Hay hotrodguy... AAAHHH they are in the exhaust port..that's why there called exhaust bumps. .. Yes you can grind them down just don't go to deep.

Tim

Sorry Charlie Tim The bumps on my 250 head are on intake 2 and 5. No bumps on the exhaust. Guess they are not all the same.

The only big bump that I know of is the valve guide, and I streamline them. You may have something different.

gotmesomeFORDs":3b9vch6h said:

so when i stick my finger in the exhaust holes on the head, about 2.25 inches in i feel a big bump. what are they? has anybody ground them out?

Click to expand...

These are deep in the manifold near the log on intake 2 and 5. I am grinding them down, takes a while hard cast iron.

well these are in the dirty hole, not the clean hole,, ,,,, and they're not the valve guide boss'.

It's amazing how much junk there there is in these castings to clean up and provide a smooth flow.

if yer portin Y not show a pic?
love 2 C how this new set-up (our site's changes) works…
AND
of course, pic R all way great ! ! !

i'm sure there are pix already and better than i can take, now if i had a hot little greasmonkey to do the tedious, well, thats a different story.

Those bumps are for the valve cover bolt holes. If you grind too far, you'll have to use sealer on your valve cover bolt threads to stop any vacuum leaks. Just my two cents.

I don't know exactly what they are but i ground then off. This isn't the best picture but you can tell where that boss was if you look close enough.

http://s1361.photobucket.com/user/cr_bo ... k.jpg.html

My head is with the machinist right now so I can't snap another one right now either.

Kou-well
Thanks
(I LOVE pic!)
no moders round here
AND
certainly no falcon-motor heads
I've found in the doz plus yrs I've looked.