O-Ring for blower/intercooler
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O-Ring for blower/intercooler

  1. #1
    steelcomp was here
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    Default O-Ring for blower/intercooler

    Do any of you guys that run blowers have o-rings instead of gaskets for your blowers or intercoolers? I was going to o-ring the intercooler on this engine I'm building but thought there might be too much movement between the blower/intercooler/intake since there's only a little torque on the bolts. Worried about maybe the aluminum galling. Any thoughts?
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    Some guy obnoxious001's Avatar
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    Quote Originally Posted by scott foxwell View Post
    Do any of you guys that run blowers have o-rings instead of gaskets for your blowers or intercoolers? I was going to o-ring the intercooler on this engine I'm building but thought there might be too much movement between the blower/intercooler/intake since there's only a little torque on the bolts. Worried about maybe the aluminum galling. Any thoughts?
    I think it's fairly common Scott. The Gentry turbo systems run them on the intercoolers, and I just did a rebuild on a little blown engine that had a 250 blower that was O-ringed, as well as the new intercooler that we added from TCM before it got sent off to dyno.

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    steelcomp was here
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    Quote Originally Posted by obnoxious001 View Post
    I think it's fairly common Scott. The Gentry turbo systems run them on the intercoolers, and I just did a rebuild on a little blown engine that had a 250 blower that was O-ringed, as well as the new intercooler that we added from TCM before it got sent off to dyno.
    My concern is that with a big heavy 1471 and a pair of dominators and only 10-12 lbs of torque on the 7" long studs, things are going to be moving around. Aluminum against aluminum doesn't like that but maybe I'm over thinking it.
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    Some guy obnoxious001's Avatar
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    Quote Originally Posted by scott foxwell View Post
    My concern is that with a big heavy 1471 and a pair of dominators and only 10-12 lbs of torque on the 7" long studs, things are going to be moving around. Aluminum against aluminum doesn't like that but maybe I'm over thinking it.
    I always assumed the low torque was due to thermal expansion of the blower, which would hold it tight?

    Obviously trimming gaskets is far more economical if he was just going for appearances as you mentioned in the other thread.

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    Senior Member wizbang's Avatar
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    Wouldn't those studs be steel ? Why not more torque ?

    Quote Originally Posted by scott foxwell View Post
    My concern is that with a big heavy 1471 and a pair of dominators and only 10-12 lbs of torque on the 7" long studs, things are going to be moving around. Aluminum against aluminum doesn't like that but maybe I'm over thinking it.

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    Senior Member wagspe208's Avatar
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    Personally... I am a gasket fan. Fuelers use O-rings.... but that is a different world.
    At your boost levels, you will not have enough movement to transfer alum.. or leave "pecker tracks" like mains do when detonated.
    Yes, 10 ish ft/ lbs.... alum studs RD... plus less toruqe on fasteners distorts the case/ manifold, etc less. Less distortion... more boost.
    I would not worry about O-rings... But why?
    Wags

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    Senior Member wagspe208's Avatar
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    Quote Originally Posted by wizbang View Post
    Wouldn't those studs be steel ? Why not more torque ?
    Distortion of case/ manifold...
    ASLO the alum studs "break" in the event of a backfire.... a pressure relief point... from before burst panels existed.
    Technically....they say.

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    Senior Member wizbang's Avatar
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    Quote Originally Posted by wagspe208 View Post
    Distortion of case/ manifold...
    ASLO the alum studs "break" in the event of a backfire.... a pressure relief point... from before burst panels existed.
    Technically....they say.
    I thought they used long steel studs on the intercoolers ?
    ( I'm not a cooler guy ? )

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    Senior Member shan's Avatar
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    Smear a light coat of grease or anti-seize on the surfaces and use the o-rings.
    Quote Originally Posted by Spike Morelli View Post
    Golfers and Fishermen are third rate bullshitters, compared to lots of hot boaters....

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    Senior Member TexasJet's Avatar
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    I use gaskets on my 540. After 4 years, no issues. I do check all the mounting nuts on the cabs, blower and intercooler every few months.
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    Senior Member wagspe208's Avatar
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    Quote Originally Posted by wizbang View Post
    I thought they used long steel studs on the intercoolers ?
    ( I'm not a cooler guy ? )
    oooooohhhhhhh.... you may be right about the long steel studs... il check

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    Member Gopher711x's Avatar
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    Wags , I had a SuperChiller setup a while back , it came with steel / alloy studs . Maybe they had been swapped as I bought it secondhand ....but they were not aluminium
    It's me Gopher711 that's been on here for many years till the site got hacked , just added the "X" behind my old name

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    Future GN Racer! fdlock890's Avatar
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    I am running an 871, super chiller on a Miersch manifold. My blower studs are 7075 T6 with 0 issues. I am only allowed 1-1 drive in the GN class though. My blower gets torqued to 13ft lbs. I hope that helps.

    Lock
    GN 6

  16. #14
    steelcomp was here
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    Follow-up. I did the oring. I did both sides of the intercooler. Used a .125 orig. This set-up has stainless studs. I'll use some silicone grease when I put everything together. I lapped both sides of the intercooler first. Still have to do the intake and blower.
    Thanks for all the input everyone.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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