NEED 289 HEAD EXPERT

B

bvillestang

New Member

Feb 21, 2004

22

0

1

warren, ohio

Jun 30, 2004

#1

• Jun 30, 2004

• #1

i have a set of 289 (C8OE) heads that i'm gonna port and polish and get machined for bigger valves. in the exhaust ports, there is a large cast in bump on the top towards the back. can i take this out or will it open up into something ?? are there any other areas i should pay attention to ? thanks for your help

 

brianj5600

Active Member

Sep 19, 2003

1,964

2

39

Middle TN

Jun 30, 2004

#2

• Jun 30, 2004

• #2

There is nothing under it. It is just a solid hunk of iron.

 

Max Power

Active Member

Jul 31, 2003

1,774

1

36

St Paul

Jun 30, 2004

#3

• Jun 30, 2004

• #3

It is the thermactor port. Get rid of it.

 

B

bvillestang

New Member

Feb 21, 2004

22

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1

warren, ohio

Jul 1, 2004

#4

• Jul 1, 2004

• #4

thanks

 

R

Ronstang

New Member

Apr 4, 2004

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Houston Texas

Jul 2, 2004

#5

• Jul 2, 2004

• #5

You can find a nice set of used aftermarket iron or possibley even aluminum heads (I got a set of aluminum heads recently for $250) for the same or not much more money than replacing seats/valves and other machining operations are going to cost you on a set of stock heads. Unported aftermarket heads will more than likely outflow/outperform the ported stock heads and save you a bunch of time and headaches.

 

SadbutTrue

Founding Member

May 1, 2002

2,390

4

49

Granada Hills, California

Jul 2, 2004

#6

• Jul 2, 2004

• #6

yeah, i'd look for a set of used GT40s if you want to keep it budget... those go for under 300 complete on ebay often and should outperform ported 289 heads, while also saving considerable weight.

 

Bad Snake II

New Member

Feb 15, 2003

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Nebraska

Jul 2, 2004

#7

• Jul 2, 2004

• #7

the only thing i have to say is that the gt40 heads can only be ran with manifolds i have heard. I am in the process of rebuilding my origional heads and have found if you want to keep the same parts on your engine it came with and still get good performance it will hurt your wallet.
Good luck

have a happy and safe 4th

 

R

Ronstang

New Member

Apr 4, 2004

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Houston Texas

Jul 2, 2004

#8

• Jul 2, 2004

• #8

Who told you that you can only run GT-40 heads with manifolds? They lied.

 

brianj5600

Active Member

Sep 19, 2003

1,964

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39

Middle TN

Jul 3, 2004

#9

• Jul 3, 2004

• #9

P heads require special exhaust.

 

D

D.Hearne

New Member

Sep 29, 2000

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south louisiana

Jul 3, 2004

#10

• Jul 3, 2004

• #10

SadbutTrue said:

yeah, i'd look for a set of used GT40s if you want to keep it budget... those go for under 300 complete on ebay often and should outperform ported 289 heads, while also saving considerable weight.

Click to expand...

The only GT 40 heads that'll save weight are the aluminum ones, and they don't sell for $300 a piece. Unless you run across a REALLY desperate seller.

 

mustang70

Founding Member

Nov 15, 2001

2,445

2

48

San Diego

Jul 3, 2004

#11

• Jul 3, 2004

• #11

They're not complete, but may be worth looking at.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33617&item=7908269484&rd=1

 

B

bvillestang

New Member

Feb 21, 2004

22

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1

warren, ohio

Jul 18, 2004

#12

• Jul 18, 2004

• #12

more questions

i just ground out one of the bumps and it opened up a small hole about 5/8" deep. i blew air into the hole and it doesn't appear to go anywhere. is this a problem or do i just leave it alone ?
thanks

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

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south louisiana

Jul 18, 2004

#13

• Jul 18, 2004

• #13

You broke into the thermactor passage. Shouldn't be a problem, unless it's open at either end of the head. Also suggest using a water hose and spray into it to see if water comes out any of the coolant passages when you do. If that's the case, you've ruined a set of heads. or at least one head.