I have run Fel-Pro and Aussie/ Permaseal Big Bore on Ruster with 12.5:1 No issues with either
Greg
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| Head Gasket Question https://www.slantsix.org/forum/viewtopic.php?t=49162 |
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| Author: | DusterIdiot [ Fri Jun 29, 2012 8:17 pm ] |
| Post subject: | Head Gasket Question |
Starting to do more than head scratch on a higher compression engine... Looking over the various builds, about how much compression can a head gasket take before you need to O-ring the block (let's disgard boost for sake of this topic). The victor Reinz gasket is holding well in my current 11.7:1SCR motor, I know the Felpro gasket seems to be OK into the 10's but I had the head gasket give during break in on an 11:1 motor...(So I'm more of a fan for Victor and Aussie at this point if over 10:1) I saw a topic where Romeo had used a .020 gasket for his 13.2:1 mill, but he didn't say it was a copper gasket or shim.... I know the Aussie gasket is well put together and I think it might hold up to the 12's. Anyone know where the upper boundary is for using an over the counter head gasket? THanks -D.Idiot |
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| Author: | Dart270 [ Sat Jun 30, 2012 4:05 am ] |
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I have run several different composite gaskets up to 11:1. Tilley said the Permaseal was good to the 12s:1, and he usually uses an o-ring on one side that hits the fire right (head side, IIRC). I have one on the 11:1 motor in Project V. I think many of the TN guys have run composites to 12:1, even FelPro. Seymour uses Corteco and his motor is over 11:1. Lou |
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| Author: | Romeo Furio [ Sat Jun 30, 2012 5:49 am ] |
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I ran the steel shim coated with Hylamar(I'm sure I spelled that wrong) but after a few passes leaks started. A.040 Felpro permatorque replaced that wanting to lower the compression a bit along with a few other changes for longevity and have had no problems. Greg has a copper but I don't know if that is what he is running at the moment. |
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| Author: | Greg Ondayko [ Sat Jun 30, 2012 6:38 am ] |
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I have run Fel-Pro and Aussie/ Permaseal Big Bore on Ruster with 12.5:1 No issues with either Greg |
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| Author: | Will [ Sat Jun 30, 2012 6:46 am ] |
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I agree with everyone. If the surfaces are flat it will work. An o'ring just on the edge of the copper band will hold over 13 to 1. Will |
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| Author: | DusterIdiot [ Sat Jun 30, 2012 10:41 am ] |
| Post subject: | Thanks guys! |
Much appreciated for the input from the guys in the know. Seemed like a good question to ask before planning the 'next' step.  -D.Idiot |
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