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Old 05-18-2017, 12:55 PM   #1
voltdr
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Default Valve Tulipping

I have a 582, BBC, with BB3xtra Oval port heads, 2.350 SS Manley Intake valves. The motor has about 60 runs. I have (2) valves that have tulipped. Motor runs about 7300 rpm through the traps. Motor has never been over-heated or run lean. Antone have any experience or thoughts about what may cause this???????
Thanks,
Dan Foley
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Old 05-18-2017, 01:42 PM   #2
63corvette
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Default Re: Valve Tulipping

With that large valve you need to go with a light weight tiatanium valve. The steel valve is hard on the springs and they tend to do what you describe in a short time.
2.200 is as large as I would ever go with steel and larger than that I go with tiatanium.
I believe a Brodix rep gave me this same recommendation some years ago.
Just My 2 Cents and experience.
Rick Cates in TX
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Old 05-18-2017, 02:16 PM   #3
voltdr
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Default Re: Valve Tulipping

I agree that titanium valves are easier on springs, but, there are too many Brodix heads with this size SS valve running w/o this happening. I've previously talked with Jeff Brotherton, from Brodix, and asked if titanium valves were worth the investment with my combination. He didn't think I would benefit from them. I am wondering if the springs were weak that it may be hard on the valves and cause them to slam into the seats too hard or too often.
Dan
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Old 05-18-2017, 06:10 PM   #4
63corvette
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Default Re: Valve Tulipping

The biggest benefit with titanium valves is the maintenance factor. I have not used a SS intake valve since the early 1990's.
Titanium is so much easier on the entire valve train.
Just My Experience
Rick
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Old 05-18-2017, 06:28 PM   #5
voltdr
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Default Re: Valve Tulipping

We agree that titanium is better but, according to the cylinder head specialists Brodix, they aren't required. Bordix is even at a loss as to what happened.The real question I had is what caused the valve to tulip?
Dan
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Old 05-23-2017, 11:44 AM   #6
Mike Pearson
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Default Re: Valve Tulipping

Quote:
Originally Posted by voltdr View Post
We agree that titanium is better but, according to the cylinder head specialists Brodix, they aren't required. Bordix is even at a loss as to what happened.The real question I had is what caused the valve to tulip?
Dan
Probably just a couple of bad valves. I have had bad luck lately with Manley SS exhaust valves. I have had 2 exhaust valves drop the heads off and destroy 2 good engines in the past couple of years. The last set only had about 75 runs on then. These are small diameter valves too. I guess I will start to change the valves at 50 runs from now on. The Manley stuff does not seem to be as good as it used to be.
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