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Bruce Jackson
Joined: 15 Dec 2007 Posts: 122 Location: United States, California, Cayucos
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Posted: Mon Dec 28, 2009 11:30 am Post subject: |
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The stock head gasket thickness is checked with the head removed, so true, there is no way to know how much more it compresses, if any, once the head is torqued down. The alternate thickness gaskets I refered to are solid copper, and don't come apart when you pull the head. _________________ Bruce Jackson |
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michael schorn
Joined: 02 Feb 2003 Posts: 577 Location: United States, Oregon, Banks
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Posted: Mon Dec 28, 2009 1:18 pm Post subject: |
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I realize that for the thinner gaskets would be copper but for those that will require thicker than the stock ones I would suspect they would be composite Felpro style. _________________ OK everyone It's my opinion only, no one elses, and does not reflect any organization or office that I belong to or hold. Thank you for your support.
Portland Karting Association
Host 2013 IKF 4 Cycle Sprint
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Bruce Jackson
Joined: 15 Dec 2007 Posts: 122 Location: United States, California, Cayucos
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Posted: Mon Dec 28, 2009 1:29 pm Post subject: |
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The copper gaskets are available up to .050", and I don't see why you couldn't use multiple gaskets if your pop out was way out there; I have heard of some engines having .040" out of the box. _________________ Bruce Jackson |
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John Matthews
Joined: 04 Dec 2004 Posts: 1995 Location: United States, Michigan, Williamsburg
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Posted: Thu Dec 31, 2009 1:33 pm Post subject: |
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In 1/4 midget they compress stock gaskets all the time to get that last gnat's A$$ power out of their little Honda engines.
If you were to go with a rule like this then it would be measuring pop-up without the gasket then adding or subtracting gasket thickness.
But, for most sprint applications I don't think you'll see enough difference for most drivers to notice. I think we can all agree that a good driver that's down a 1/2 HP will still whip the pants off a mediocre one that's up a full HP. The more important question here is why does it really matter for club racing? The beauty of packages like the WF is that you can go out and run it without spending all your time and money on the latest package from Italy.
Briggs has already come up with the LO206 for folks who want to run a dead even powerplant. If somebody wants to run a thinner headgasket at their local club why not just say it's a local option? Billet rods have been allowed in Animal class at local tracks for just about forever and it's worked out fine. Treat this proposal the same way, do it at the local level and if it catches on then in 5 or 10 years it'll become a national rule.
If your local track doesn't allow it then just run one anyway and see if it get's you into the tech shed. If it really makes you competitive with the blueprinted engines they you'll have a compelling reason to ask the rules committee for a change, if not then no harm no foul....
I built a Grand National winning engine for a guy a while back and there were people on this list who swore they could be just as fast with a WF straight from the box. I can't argue with that, Briggs does a pretty good job with these engines and IMHO a great driver could win in a shopping cart. Not that I don't think the engine matters, just that from what I've seen most club racers aren't so closely matched that it makes as much difference as they think.
JMHO _________________ John Matthews
Heartbeat Power, LLC. |
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charles hunter
Joined: 28 Apr 2007 Posts: 732 Location: United States, California, anaheim
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Posted: Sat Jan 02, 2010 1:47 pm Post subject: |
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Yep John, thats what I meant to say. _________________ swampwater smyth concurs "If you aint first, yer last."
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Paul Hutt
Joined: 26 Sep 2009 Posts: 388 Location: United States, Washington, Olympia
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Posted: Thu Jan 07, 2010 5:48 pm Post subject: |
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I am brand new to karting and this is all Greek to me.
So one comment. In Spec Miata the only change allowed to the engines are the addition of a cold air intake, which is critical given the heat they build up.
But it is not important to me - I will never get to the level where I need to worry about these types of things.  |
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