Author Topic: head id  (Read 1983 times)

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Offline 1981turbotransam

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head id
« on: April 19, 2009, 07:57:57 PM »
i just got a set of heads at charlotte and i need them to be ided for me please. on the sides of the heads they say 6x4 waht are they?
GREATER LOVE HATH NO MAN THAN TO LAY DOWN HIS LIFE FOR A FRIEND
1980 Indy Pace Car Turbo Trans am 301T
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Offline Gold78Spc

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Re: head id
« Reply #1 on: April 19, 2009, 08:04:56 PM »
Sound like heads off a Pontiac 400.  Don't know the combustion chamber size off hand but could probably look it up for you if you need it.
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Offline 1981turbotransam

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Re: head id
« Reply #2 on: April 19, 2009, 08:10:53 PM »
i think they are the 220 hp heads not positive
GREATER LOVE HATH NO MAN THAN TO LAY DOWN HIS LIFE FOR A FRIEND
1980 Indy Pace Car Turbo Trans am 301T
1977 Pontiac Trans Am 400 Auto SE Hardtop
looking to buy a 1980-81 Trans Am

Offline Gold78Spc

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Re: head id
« Reply #3 on: April 19, 2009, 08:22:51 PM »
Copied this from this page here.  Its a good source for Pontiac head info.

http://ronspontiacpage.com/reference-pages/stockheadspecs.htm

78 Gold Special Edition TA
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99 Diamondback 18 Spd
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04 Buick Rendezvous
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Offline Joker (告r茺agon)

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Re: head id
« Reply #4 on: April 19, 2009, 08:26:10 PM »
Depending on the date code they are either off of a '76 or '77 350 or a '77, '78 or '79 W72 400. They all used the same head.

2.11"/1.66" valves and 94cc combustion chambers

Larry


Offline 1981turbotransam

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Re: head id
« Reply #5 on: April 19, 2009, 08:31:51 PM »
wahts the hp rateing?
GREATER LOVE HATH NO MAN THAN TO LAY DOWN HIS LIFE FOR A FRIEND
1980 Indy Pace Car Turbo Trans am 301T
1977 Pontiac Trans Am 400 Auto SE Hardtop
looking to buy a 1980-81 Trans Am

Offline 1981turbotransam

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Re: head id
« Reply #6 on: April 19, 2009, 08:33:31 PM »
i think on the secondary stamp there is an 8
GREATER LOVE HATH NO MAN THAN TO LAY DOWN HIS LIFE FOR A FRIEND
1980 Indy Pace Car Turbo Trans am 301T
1977 Pontiac Trans Am 400 Auto SE Hardtop
looking to buy a 1980-81 Trans Am

Offline Joker (告r茺agon)

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Re: head id
« Reply #7 on: April 19, 2009, 08:35:50 PM »
Then they're 6X-8 heads. Not 6X-4. Same head with 101cc chambers. Lower compression. They were the ones used on the L78 400s.
Larry


Offline Joker (告r茺agon)

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Re: head id
« Reply #8 on: April 19, 2009, 08:36:36 PM »
wahts the hp rateing?

The heads don't have a HP rating. That all depends on the engine they're bolted to.
Larry


Offline 1981turbotransam

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Re: head id
« Reply #9 on: April 19, 2009, 08:41:18 PM »
but the casting number says 6x4
GREATER LOVE HATH NO MAN THAN TO LAY DOWN HIS LIFE FOR A FRIEND
1980 Indy Pace Car Turbo Trans am 301T
1977 Pontiac Trans Am 400 Auto SE Hardtop
looking to buy a 1980-81 Trans Am

Offline Joker (告r茺agon)

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Re: head id
« Reply #10 on: April 19, 2009, 08:48:00 PM »
There's a 4 in the center right next to the 6X? or is it over to the right like in the pic I posted? That large 4 you see in that pic is not part of the casting number. The last digit in either the 6X-4 or 6X-8 ID is the secondary stamp number.
Larry


Offline 1981turbotransam

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Re: head id
« Reply #11 on: April 19, 2009, 08:50:10 PM »
mine look like the one in the pic
GREATER LOVE HATH NO MAN THAN TO LAY DOWN HIS LIFE FOR A FRIEND
1980 Indy Pace Car Turbo Trans am 301T
1977 Pontiac Trans Am 400 Auto SE Hardtop
looking to buy a 1980-81 Trans Am

Offline Rick

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Re: head id
« Reply #12 on: April 19, 2009, 11:01:48 PM »
Are you sure you're reading that right?  For giggles and grins, what does the secondary stamp (shown in the pic above) say? ???

Offline Joker (告r茺agon)

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Re: head id
« Reply #13 on: April 20, 2009, 04:51:56 AM »
Are you sure you're reading that right?  For giggles and grins, what does the secondary stamp (shown in the pic above) say? ???

i think on the secondary stamp there is an 8
Larry


Offline Rick

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Re: head id
« Reply #14 on: April 20, 2009, 11:39:35 AM »
Larry, that's what I thought he said, but then he said they was a 6X4 on the center ports.  I've never seen that, so I'm thinking that the casting numbers are eroded and hard to read and may be some other 3 letter/digit number.  So I'm confused right now as to what he does have, and thought it worth a second look. ???