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godwingn87
02-27-2008, 10:16 PM
I'm going to be replacing my head gaskets and bolts with studs and I figured that I would go ahead and do some head work.. I talked to my cousin(which has ported heads before) and he told me that he would gladly help me accomplish getting it done but 1st, he wanted me to see if I could find the information on how much you can port before getting into the danger zone on our heads.. I have looked around on the net and nothing I have found tells me how much is too much. I don't really care if It gets ported to the max I just want to know where that is so I don't get too close.. Any specs or even pointers would be appreciated. BTW, my cousin has never messed with heads off a turbo car-is there anything you would do different on GN heads that you wouldn't do on non-turbo cars or vice versa? Thanks! :tup:

Keller
02-27-2008, 10:57 PM
http://www.gnttype.org/forums/showthread.php?t=4437

The old Buick "Power Source" book would be a great place to look, too...if you could find one.

godwingn87
02-28-2008, 11:34 PM
Keller, is this the book your referring to?
http://cgi.ebay.com/ebaymotors/Buick-GNX-Grand-National-Power-Source-Book-Stage-I-II_W0QQcmdZViewItemQQcategoryZ6761QQihZ017QQitemZ2 70215114398QQrdZ1QQsspagenameZWDVW
IF so, let me know if you think I should get it. Does it have all the detailed information on porting TR/GN heads? Thanks! :tup:

Keller
02-29-2008, 12:47 AM
That's the book. There are about 7 pages of just porting templates, and many more pages with notes about porting and headwork. Full of detail on engine builds for the V6.

HOWEVER...a lot of the chat is for Stage motors throughout the book. Not all of it, but a fair bit. The book was printed in 1985, so much of the info is somewhat dated. (i.e. No mention of the Cometic gaskets, etc.) The 8445 heads have been around since before that time, of course. As have the rolled fillet cranks. So its not terribly important that the book predates the last style of TRs. Not a must-have book, but it is a good one and a valuable one. I do think it is a very valuable reference.

godwingn87
02-29-2008, 11:10 PM
Hey Keller, I found this for a better price...
http://www.factoryautomanuals.com/ProductDetails.asp?ProductCode=84049&click=2
Do you think it's the same thing? Maybe it's a duplicate--:dunno: Either way, if it has the same information as the other one on eBay, it's sold :tup:

Keller
02-29-2008, 11:58 PM
May just be an earlier version.

Looks like the book is sold, regardless.