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Re: porting 906 heads
[Re: VernMotor]
#498931
10/19/09 08:45 PM
10/19/09 08:45 PM
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Joined: May 2005
Posts: 6,446
NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Nice!  I actually wish my buddy, Dwayne Porter could comment here. We learned a lot about this head design from the FAST builds I did here at the shop. He did all the heads on my engine builds.  Another thing to mention that is a big concern with these, especially when pushing them to the limits. External cracks. These castings, especially those which have been decked heavily, will "oil can" and create external water cracks. heck, I have a pile of stock heads that I have changed out over the years with external water cracks. The main problem area seems to be under the two center exhaust ports. This area is particularly thin. It just pains me to see someone spend a lot of time and money on these, when they know they are a ticking time bomb. Yes, and I know people have made some serious power with these. When that's all you had to work with you made the best of it. No different with the old Hemi stuff. We would buy tore up blocks, busted up heads, and cracked cranks and try to patch it up and make it work. Now we can buy new stuff. MB
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Re: porting 906 heads
[Re: JohnRR]
#498934
10/20/09 12:59 PM
10/20/09 12:59 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
master
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master
Joined: May 2004
Posts: 3,210
robin hood country
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Did anyone see the motor that Indy entered and won with in the enginemasters competition, it had aluminium inserts in the ports.
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: porting 906 heads
[Re: deaks]
#498935
10/20/09 03:14 PM
10/20/09 03:14 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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adding inserts is common. Same with the Ford Cleveland heads.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: porting 906 heads
[Re: JohnRR]
#498936
10/20/09 04:15 PM
10/20/09 04:15 PM
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Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
VernMotor
master
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master
Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
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Quote:
Vern , where did that cut up head crack ?
Been to many years now..Not sure I remember but I am thinking it was in the intake port.
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Re: porting 906 heads
[Re: moeflo]
#498937
10/20/09 09:35 PM
10/20/09 09:35 PM
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Joined: Dec 2007
Posts: 12,594
Great Neck,LI,new york
hemi-itis
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 12,594
Great Neck,LI,new york
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Quote:
It is my job. I can see your point on doing the same head for the same job. It helps tremendously in saving testing and development time.
But, doing mainly heads for various class racing, I'm always working with different lift ranges, engine sizes, RPM ranges, etc. so I rarely do a set w/o the need for at least, some specific development around an existing combination. I may have 100 hours in a set using a fully CNC'ed set as a starting point.
So your saying even with a set of fully ported CNC'd heads they still need to "detail" the port or bowl?? 
Last edited by hemi-itis; 10/21/09 08:09 PM.
HEMI-ITIS has no cure.
My condition is fully BLOWN!!
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Re: porting 906 heads
[Re: 383man]
#498938
10/20/09 11:11 PM
10/20/09 11:11 PM
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Joined: Feb 2006
Posts: 2,381
MD
Kevins493
top fuel
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top fuel
Joined: Feb 2006
Posts: 2,381
MD
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Quote:
Nice work. This is the only pic I have of my 906's on my 63. I bet I have about 30 hrs total in them as not only did I do the bowls and ports I enlarged the seats and installed the 2.14 & 1.81 valves myself. I really dont think I can ever port another set of heads as it made my back hurt so bad bending over to work on them I could hardly stand it. I think the next eng I build I will just get some CNC aluminum heads and save my back the pain.  What is the car and combo they are going on?? Ron
You and me both Ron. When I did those 346 heads for the Fury I was sore for weeks. Of course now I don't have time to mess with it either..
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Re: porting 906 heads
[Re: hemi-itis]
#498939
10/21/09 08:15 PM
10/21/09 08:15 PM
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Joined: Dec 2007
Posts: 12,594
Great Neck,LI,new york
hemi-itis
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 12,594
Great Neck,LI,new york
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Quote:
Quote:
It is my job. I can see your point on doing the same head for the same job. It helps tremendously in saving testing and development time.
But, doing mainly heads for various class racing, I'm always working with different lift ranges, engine sizes, RPM ranges, etc. so I rarely do a set w/o the need for at least, some specific development around an existing combination. I may have 100 hours in a set using a fully CNC'ed set as a starting point.
So your saying even with a set of fully ported CNC'd heads they still need to "detail" the port or bowl??
I would have thought that a CNC performed job would be DONE and need nothing else   
HEMI-ITIS has no cure.
My condition is fully BLOWN!!
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Re: porting 906 heads
[Re: hemi-itis]
#498940
10/22/09 05:38 PM
10/22/09 05:38 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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i have a virgin set of 906 heads that i was going to get ported by hand but after seeing the results a CNC program has over a set of hand ported heads,its a no brainer to go the CNC route.
but my question is, after they are CNC ported, how much hand work extra is there to do, polishing, blending,etc.
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Re: porting 906 heads
[Re: RAMM]
#498943
10/23/09 08:27 AM
10/23/09 08:27 AM
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Joined: Jan 2003
Posts: 75,389
A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,389
A gulag near you.
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Quote:
Guys, this is the perfect thread right now! I am currently porting a set of '452's. I have a 1020 and haven't gotten radical yet but baselined them @ 215 cfm and now have them @ 262--but want more.
Yes I know that flow #'s are a small part of it. I'm just playin here and want to get some numbers to brag about. What can I do to get max numbers? And no I don't want to leave out the spark plug! Oh and I have read the archives but without pictures it doesn't help as much as it could. Thanks J.Rob
The numbers you want to BRAG about are at the end of the 1/4 mile.
Here's some food for thought, how long does the valve sit at MAX LIFT ??? The important flow numbers are those BELOW max lift since the valve is at all those lifts TWICE .
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