Thoughts on max wedge ported stock castings
#177100
12/28/08 04:24 PM
12/28/08 04:24 PM
|
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
OP
master
|
OP
master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
|
Ive run into a semilocal set of stock BB castings that have been opened up to mw size. I really havent paid any attention to the stock castings with MW size runners before. Do the MW size ports on stock castings hurt low lift flow? Do they increase high lift flow that much or is the benefit in intake selection? Any thoughts appreciated.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
|
|
|
Re: Thoughts on max wedge ported stock castings
[Re: Von]
#177101
12/28/08 05:10 PM
12/28/08 05:10 PM
|
Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
|
master
Joined: Nov 2003
Posts: 6,293
Rock Springs
|
Are we talking about stock Max Wedge Cast heads, or later 906/452 heads that has been opended up?
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
|
|
|
Re: Thoughts on max wedge ported stock castings
[Re: Bob_Coomer]
#177102
12/28/08 06:02 PM
12/28/08 06:02 PM
|
Anonymous
Unregistered
|
Anonymous
Unregistered
|
It usually helps the flow of H2O from the water jacket into the intake or exhaust ports. Did in my case 
|
|
|
Re: Thoughts on max wedge ported stock castings
[Re: Bob_Coomer]
#177103
12/28/08 08:40 PM
12/28/08 08:40 PM
|
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
OP
master
|
OP
master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
|
Quote:
Are we talking about stock Max Wedge Cast heads, or later 906/452 heads that has been opended up?
906/452 castings
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
|
|
|
Re: Thoughts on max wedge ported stock castings
[Re: Von]
#177104
12/28/08 08:50 PM
12/28/08 08:50 PM
|
Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
master
|
master
Joined: Jan 2003
Posts: 5,484
SoCal
|
I did a set for myself years and years ago, back in 1991.
I used a 906 casting, and opened it up to max wedge and ran it as high as I could go to right before the spring seat area. Then tapered it down from there.
It made quite a bit of difference. I just cut the ports off of a stock valley pan and silicon'd the edges to the intake manifold. I used an M1 that I also raised the roof all the way into the plenum.
It was alot of work, but in my Charger it picked up 3.5 tenths...and I did mill the heads down from 85cc to 82cc so it wasn't all head work.
This was an 800DP on a flattappet 440.
Car weighted in at 3820lbs. with me!!
It went from 11.72 to 11.38 with only those mods.
Brian
Brian Hafliger
|
|
|
Re: Thoughts on max wedge ported stock castings
[Re: Cab_Burge]
#177106
12/29/08 12:18 AM
12/29/08 12:18 AM
|
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
OP
master
|
OP
master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
|
Quote:
Von, be very careful on buying a used set of ported 906 to M.W. intake port size. It is very easy to mess those heads up trying to make them better,(to many valve jobs, cut in the wrong places and so on  ) if you really want them take them to a reputable machine shop with a good flow bench and have them tested, post the results on here before buying them to see what the knowleagable head guys on here think of those flow #s first before buying for the heads 
Good advice Cab. I wouldnt buy a set of used heads without reputable flow numbers. 
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
|
|
|
Re: Thoughts on max wedge ported stock castings
[Re: Von]
#177107
12/29/08 12:22 AM
12/29/08 12:22 AM
|
Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
|
master
Joined: Jan 2003
Posts: 9,826
las vegas
|
is any one looking for a set of MW heads...
have friend who looking to sell a set that she has owned for many years...
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
|
|
|
Re: Thoughts on max wedge ported stock castings
[Re: Von]
#177109
12/29/08 01:26 AM
12/29/08 01:26 AM
|
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
|
master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
|
Quote:
Quote:
Von, be very careful on buying a used set of ported 906 to M.W. intake port size. It is very easy to mess those heads up trying to make them better,(to many valve jobs, cut in the wrong places and so on ) if you really want them take them to a reputable machine shop with a good flow bench and have them tested, post the results on here before buying them to see what the knowleagable head guys on here think of those flow #s first before buying for the heads
Good advice Cab. I wouldnt buy a set of used heads without reputable flow numbers.
Cab , has some good advice Id stay away from those heads unless they were really cheap. Even then, Id be afraid of those heads. As in maybe cracking and hydraulicing your motor.
Imo opening up a 906 head to MW size wont make it Flow any better numbers. But that doesnt mean it wont make the car run any faster as it will have extra port volume.
The choker on the 906 port isnt the opening its the inner throat and short turn. That will dictate the max airflow not the size of the port opening. Whether it be OE or MW size.
Also when porting a old OE head the metal fatigues rather quickly with the beating of the grinder burr. The more you grind/port over the same area the more Fragile/fatigued it becomes.
If you want to see how fragile these OE steel cast heads are. Take a Small ballpeen hammer and start swinging away.
You can bust these cast steel heads to bits, no problem. A over ported port will not only be thin but also serverly fatigued IMO mike
|
|
|
|
|
