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Author Topic:   Heads
ryan
Dirt Freak

Total posts: 430
posted October 22, 2002 08:00 PM
I found some phase 2 bowtie heads at a good price ($435 new) but it says they said the place where the valve cover sits on is not machined. I have never dealt with after market heads before and I was wondering what the heck is going on with that. I thought most heads were not machined in that area and were just made that way in the casting process. They also have other bowties that they say most people get but at 150 bucks more. Either way I will go with the cheaper set and take it to the machine shop if I have to. I was wondering if anyone has dealt with this and could steer me in the right direction. thanks

ryan
Dirt Freak

Total posts: 430
posted October 23, 2002 09:08 PM
Anybody know of any other places to buy them on the web besides sdpc and flatlander. thanks

66jj
Dirt Freak

Total posts: 352
posted October 23, 2002 09:39 PM
i have a set of angle plug bowties for 450 bare they have half night on them they were new from gm..

you can have the parts for 100 more - 6 valves, i broke the timing chain first time out...


jmj661@cs.com

Monster
Dirt Maniac

Total posts: 135
posted October 23, 2002 09:47 PM
Sometimes things don't get machined or finished properly and are sold as blems. I would visit your machinist of choice and see just how much he is going to charge to finish them if need be. Are the valve cover holes in place and tapped? The only heads I've seen that use an as-cast surface there are oem production Chevy anchors.

ryan
Dirt Freak

Total posts: 430
posted October 24, 2002 05:02 PM
Thanks for the offer 66j but I want new heads I have been burned on used heads before and I would rather pay a little more for something right out of the box. Monster, it didn't occur to me to ask about the valvecover holes until it was too late in the day. Dad says he know how to make center bolt valcover out of normal covers. Dont know how myself??? I talked to the machine shop and he said if I need to get the valcover gasket area machined down to get a flat surface for my valvecover he would charge 45$. He also thought that maybe it was just like the older chevies. Thanks

ryan
Dirt Freak

Total posts: 430
posted November 17, 2002 09:56 PM
Found out the other day that there are valvecover bolt holes so I think I will get a set. I was wondering if they take stock length valves. Just curious because I see .100 longer valves in the catalogs and I wanted to make sure I was getting the right length. What does a longer valve accomplish? Thanks

outlawstock17
Dirt Forum Champ
Total posts: 620
posted November 17, 2002 10:25 PM
longer valves are used when running roller cams and BIG solid lifter cams with lots of lift. it increases the set up height and makes room for the extra lift. to use the longer valves, you'll need to machine the heads for bigger diameter double or triple springs that are needed for larger cams. no z-28 springs here.........

ryan
Dirt Freak

Total posts: 430
posted November 18, 2002 04:33 PM
Thanks outlaw. I won't be running anything like that so I should be good to go. I thought I would make sure I have never bought aftermarket heads.

car311
Dirt Roller

Total posts: 22
posted November 20, 2002 03:10 PM
Almost all heads that are new and sold "complete" usually have the valves stuck in, springs slapped on etc. The bowl areas have not been blended and they have not been gasget matched. Anytime i buy new heads "complete" i have the valves lapped, bowls blended (smoothed and de-burred) and they will also get gasget matched.

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