Rick, I flowed a slant head for Volaredon that had IIRC 318 valves and garage porting, I don’t remember what seats he had in it. It had decent numbers. Maybe Don will see this and post the info.

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Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

The Engine builder valves are 1.7 & 1.4 or 1.44. I have that set up on my "back up" race engine that I installed in my truck. I spent @ 12-15 hours on the porting if I remember correctly. But I always wished I had it flowed. However it is not likely I would pull it just to test it.

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

I have that info at home , I'm not there right now.
No 318 valves, just 318 springs. I have the SI oversized valves. Same 1.70/1.44 sizes you referenced.

That would be great info! Thanks

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

If HP calculators are anywhere near correct, Ryan's 11.00 runs produce @ 324 HP by ET, and @ 308 by mph.

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

I contacted the flow bench guy here and he is ready to look at my head, the one off the engine, not the other one.
$50 bucks to do 1 intake and 1 exhaust.
I have no idea if that is the going rate, but sounded reasonable to me.
I will let you know what he finds.

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Hyper_pak

Not sure of the going rate, but it sounds reasonable to me as well!


Now the real question... if it flows poorly how do you know what to do?

I suppose you could mess a head up real good by taking too much material off or off in the wrong place.

Greg

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http://www.youtube.com/hyperpack

Yes, the age old question.
I will listen to his recommendations and take it from there.
This head was a last minute build after I had those 2 other heads with problems.
So I was not too concerned about peak performance.
I have another here that I will be installing with bronze walls and thin stem valves.
I plan to just do minimal porting in all the recommended areas, nothing overly excessive.

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Hyper_pak

$50 is plenty cheap! I think I paid $80 4 or 5 years ago. I think all 3 of our heads were tested on #3 cylinder. I have no idea why? I just know Mike did # 3 and had the others done on the same cylinder.

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

Just a guess, but 3 or 4 would be the easiest to get the head mounted on the bench.

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Official Cookie and Mater Tormentor.

That makes sense

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

Yes, trying mount it on #1, especially with a heavy Slant head would turn the flow bench over...! LOL

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There's no such thing as too much cam....only not enough engine!

I finished the engine on my son's Honda last week so now back on the Colt.

I dropped the head off at the flow bench yesterday.
He was not too impressed with my 318 valves and the guides in the head.
Neither am I but that was not the reason for dropping it off with him!

I was surrounded by about a million aluminum heads in his shop.
I guess it's easy to make horsepower when summit-edelbrock-trick flow-etc drop race ready parts off at your door.

Details to follow.

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Hyper_pak

linking this post per Stan's request

https://www.slantsix.org/forum/viewtopi ... of+secrets

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Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Stan, actually he's busy because those shiny aloominum heads are not race ready when delivered.

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Official Cookie and Mater Tormentor.