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

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

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

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

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

Re: Valve Tulipping
 

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.

Re: Valve Tulipping
 

Detonation causes tuliped intake valves.....

It also can show up as top ring land excessive wear and obvious damage to the pistons above the top ring.

Bad gas, to much timing.....some sort of timing malfunction during a run that allows timing to advance with RPM....

I had a digital box once that advanced the timing to over 70 degrees once the engine started.....Holley Annihilator.......!!! Took me 3 tries to get one of those boxes that worked.....

Re: Valve Tulipping
 

Thanks Rich. When I put it back together I will check the timing again and see if it changes as the RPMs increase. I also added the ability to move my O2 sensors (2) to each cylinder to keep better track of the mixture.
Dan