Valves from a NA 8445 head ?

822 Views 6 Replies 5 Participants Last post by Toadie's T-Type, Oct 24, 2003

Getchasum

Discussion Starter · Oct 21, 2003

I was told that they may be a difference in the materials that valves are made from, between a set of heads from turbo vs the same casting (8448) heads off a NA motor. I was planning on back cutting a set of stock valves and a little port work on a set of NA heads I've got. So the question I have.... should the valves be replaced because they are a weaker material?

Also are they the same size?

<small>[ October 21, 2003, 06:28 AM: Message edited by: Getchasum ]</small>

Save

1 - 7 of 7 Posts

ULYCYC

· #2 · Oct 21, 2003

The Buick casting number is 8445 not 8448. I never heard of and difference in stock valves.
GM stage 2 parts do have different valve choices but that is not your question.

Save

Getchasum

Discussion Starter · #3 · Oct 22, 2003

Typo...8445 is the heads in question.

Save

87natty

· #4 · Oct 22, 2003

I just stripped a set of 8445 heads of an NA Regal and the valve stems weren't even centered with the valve. They're not worn or bent, just off center about 5 mm!

Save

Kendall Frederick

· #5 · Oct 22, 2003

Getchasum:
I was told that they may be a difference in the materials that valves are made from, between a set of heads from turbo vs the same casting (8448) heads off a NA motor. I was planning on back cutting a set of stock valves and a little port work on a set of NA heads I've got. So the question I have.... should the valves be replaced because they are a weaker material?

Also are they the same size?

I have stripped several sets and compared valves with ones from a turbo head. They had the same markings, appeared the same visually, and were the same size. I backcut a number of them and they're in turbo cars now; no problems.

Save

Getchasum

Discussion Starter · #6 · Oct 23, 2003

Thanks! I'll do a good inspection on them, if they appear to be ok......I'll use them.

Save

Toadie's T-Type

· #7 · Oct 24, 2003

Getchasum:
Thanks! I'll do a good inspection on them, if they appear to be ok......I'll use them.

If they are bad. Check with Bryan Weaver. He may still have a set or 2 laying around.
He had a big sale on them last year.
I bought 2 sets.

Save

1 - 7 of 7 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month