Exhaust valves
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Exhaust valves

  1. #1
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    Default Exhaust valves

    In reading on this forum and online it seems like just about everybody says to either use Manley inconel or ferrea super alloy. I also read that ferrea is half the cost, but I'm either looking in the wrong place or things have changed as everywhere I have looked they are 45/50 dollars each. Is there anything else by other company's that are just as strong? I'm running n/a aluminum heads but there's always the possibility of a small blower at some point.

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    Some guy obnoxious001's Avatar
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    Quote Originally Posted by nos1967 View Post
    In reading on this forum and online it seems like just about everybody says to either use Manley inconel or ferrea super alloy. I also read that ferrea is half the cost, but I'm either looking in the wrong place or things have changed as everywhere I have looked they are 45/50 dollars each. Is there anything else by other company's that are just as strong? I'm running n/a aluminum heads but there's always the possibility of a small blower at some point.
    Which heads do you have now, I thought you were talking 049 iron heads?

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    I decided to sell my 990's that I had built last year and got some bare oval port aluminum heads. I know I'm going to get a lot of crap but they are speedmaster. My neighbor worked for an engine shop and has never had a problem with them. For 650$ a pair I couldn't find any used name brand iron or aluminum heads for that price. I have all the hardware but valves and I'm having a shop inspect and install everything on them.

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    Senior Member Futs's Avatar
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    I just bought some ferrea super alloy for my AFR;s for 37 bucks each from Dakota. ask for Brian 605 388-3396

    I even got the super light ones. they weighed 131 grams vrs the 164 gram stainless valves that were in the heads from AFR.

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    Check with Tony Mamo (661) 295-9587
    Half the people in the world are below average.

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    I guess what I'm really wondering is if the super alloy or inconel are really necessary for a 500-550hp jet boat engine running 5500rpm max. Some people seem confused as to why I want to run such an expensive valve in a mild bbc, while others say it's the only way to go...

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    Senior Member Futs's Avatar
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    Quote Originally Posted by nos1967 View Post
    I guess what I'm really wondering is if the super alloy or inconel are really necessary for a 500-550hp jet boat engine running 5500rpm max. Some people seem confused as to why I want to run such an expensive valve in a mild bbc, while others say it's the only way to go...
    Well I ran the stainless ex valves in mine for years with no problems. even sprayed it with a 300 shot. I upgraded because piece of mind and I want to put a bigger shot on it. Your deal should be fine with a good stainless ex valve. are you running dry headers or water? if you get any reversion and have a water dibblet come into contact with a hot ex valve your asking for problems. A valve failure is one of the most destructive things that can happen to an engine. Its your money and your piece of mind, so if you want them get them.

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    Senior Member wagspe208's Avatar
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    Quote Originally Posted by nos1967 View Post
    I guess what I'm really wondering is if the super alloy or inconel are really necessary for a 500-550hp jet boat engine running 5500rpm max. Some people seem confused as to why I want to run such an expensive valve in a mild bbc, while others say it's the only way to go...
    NO
    Wags

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    Running logs, but I'm changing cams and getting one with reversion in mind.

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    Futs makes a good point. The presence of water is always an issue with wet exhaust and another good reason to run a high temp alloy ex valve in a marine engine.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Senior Member wagspe208's Avatar
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    Running bad ass valves is a band aid. Fix the reversion issue. Then piss off 4x the money for valves if it makes you feel good.
    Just my .02.
    Wags

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    The cam I chose should have zero issues with reversion. 112 and 235 @ .050. I decided to go with stainless valves and spend the money on a roller setup.

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    Interesting reading material on valves. FYI only.
    http://www.enginebuildermag.com/2016...ves-and-seats/


    Sent from my iPhone using Tapatalk

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    Default hey Schick

    Is that Tony at C.H.E. ??

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