Water pressure versus head gaskets
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Water pressure versus head gaskets

  1. #1
    Senior Member Brendellajet's Avatar
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    Default Water pressure versus head gaskets

    What is the maximum pressure that can be run through a BBC with a felpro head gasket? This is for a new engine, 10:1 compression, iron heads, 91 octane deal. Would like to run on the cool side to protect against detonation.

    Not planning on force feeding, but If I run 15-18 lbs of pressure through the block as measured at the thermostat blockoff will there be a problem with the head gasket?

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    About 500' AGL MudPumper's Avatar
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    I was told not to run more than 25 lbs. Mine runs a max block pressure at WOT of about 20 lbs and I havent had any problems. Ran my last boat the same way for 3 years with no probs.

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    TEN THIRTY ONE RCB19's Avatar
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    You will be fine with that Brian. I set the regulator at 25#s in that motor with fel-pros and never had a problem. When I tore it down the gaskets were perfect. Number 10 in and out.
    RCB

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    Senior Member Brendellajet's Avatar
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    Thanks guys.

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    DJD
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    6TH STREET MAFIA PRES. DJD's Avatar
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    I used to run a blown motor with fel pro gaskets with 20 lbs of boost and 20 lbs of water pressure an never had a problem.

  8. #6
    Senior Member jetboatperformance's Avatar
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    Default gaskets

    Had problems with dead soft copper and a few others types ,switched to Felpros and in some cases Cometics laminents and never looked back! big compression , boost ,water pressure etc never a problem Tom

  9. #7
    Senior Member H20MOFO's Avatar
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    My local motor guy is a big fan of copper, with o-ringing the block, any thoughts on that? Thats how mine is ,but I had to go copper because of how far my block had to be decked.
    Another Hot Boat refugee

  10. #8
    Senior Member DuaneHTP's Avatar
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    Fel-Pro head gaskets are not a water problem. The intake gaskets will go before the head gaskets. If you go with copper, coat them both sides, and coat the head and block with Gaskacinch. http://www.minimania.com/web/Item/GA.../InvDetail.cfm Let them dry at lest thirty minutes and then bolt on. That usually takes care of the water problem associated with copper heqad gaskets.

  11. #9
    149 BGJ-Willis Power 540 willis's Avatar
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    25AUB-Z3
    Water Pressure Reducing Valves
    Size(s) :
    1/2 to 2 in. (15 to 50mm)
    Description:Series 25AUB-Z3 Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water consumption. It consists of a bronze body construction, union inlet connection, integral stainless steel strainer and high temperature resistant reinforced diaphragm for hot water. The Series 25AUB-Z3 is available with a variety of end connections including: threaded, solder, PEX and CPVC with both union and double union connections. Series 25AUB-Z3 has an adjustable pressure range and is serviceable in-line. Maximum Working Pressure: 300psi (21 bar), Adjustable Reduced Pressure Range: 25 to 75psi (172 to 517 kPa), Standard Pressure Setting: 50psi (344kPa).

    I have wet headers, bassetts and this valve has been good over many years and no problem.

    Plus it has the capasity for the high out put of the jet and oil cooler before the water enters the engine.


    Willis
    Last edited by willis; 02-29-2008 at 07:16 PM.

  12. #10
    Senior Member Robert Jonsson's Avatar
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    Last edited by Robert Jonsson; 03-03-2008 at 09:20 AM.

  13. #11
    Highaboosta Unchained's Avatar
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    I've used solid copper gaskets for 7 years. They have the best heat transfer.
    I silicone around the water transfer ports and have'nt had a problem except for the learning curve in the first season.
    I've seen 60 # of block water pressure at WOT.
    I had the water line off the pump reduced to 5/16" ID, the line was divided to feed the intercooler, and I had a bypass but at WOT the pressure was still high but caused no problems.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

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