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the_engineers
PostPosted: Fri Nov 06, 2015 5:54 pm 
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Does anyone know what the valve angle (off vertical) is for the /6? For example, 340 is 18* and SBC is 23*...

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emsvitil
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PostPosted: Fri Nov 06, 2015 6:07 pm 
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30 degrees + - some unknown amount in the head.........


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Dart270
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PostPosted: Sat Nov 07, 2015 4:05 am 
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He means off the axis of the cylinder. I think I heard it is the same as LA engines (18 deg), but I don't really know. I am interested too!

Lou

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Badvert65
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PostPosted: Sat Nov 07, 2015 6:55 am 
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I measured about 13 +/- a degree or so on the drawing in the Mopar Engines manual.

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ProCycle
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PostPosted: Sat Nov 07, 2015 7:43 am 
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I measured the angle on a head a while back but ended up not doing whatever it was I wanted the angle for.
The number that sticks in my mind is 11 degrees.

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ProCycle
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PostPosted: Sat Nov 07, 2015 8:57 am 
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OK, I got curious so went out to the shop where I happen to have a bare head getting ready take to the machine shop.

With an old intake valve and my 'anglelometer' I measured 11.5 degrees.

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Dart270
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PostPosted: Sat Nov 07, 2015 1:05 pm 
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Good to know, guys. I thought about measuring one on the bench, but y'all beat me to it.

11.5 deg might explain why you can make a good flowing head (relative to the cyl displacement), even with the 30 deg angle between the intake surface and the cyl axis. Need to think further about this...

Cheers,

Lou

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sandy in BC
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PostPosted: Sat Nov 07, 2015 2:00 pm 
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Just dedicate 30 billion neurons to 3D mapping....you will figure it out.

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the_engineers
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PostPosted: Sat Nov 07, 2015 3:03 pm 
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Thanks everybody!

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Doctor Dodge
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PostPosted: Sun Nov 08, 2015 9:12 am 
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The factory blueprints spec the valve guide angle at 12 degrees.
Early SL6 engine development engineering documents say that 14 degrees was also tried & tested but 12 degrees worked "better" for the engine's intended use.
DD

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Dart270
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PostPosted: Sun Nov 08, 2015 9:27 am 
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I was hoping you would chime in, Doug - thanks! 12 deg it is...

Lou

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