Re: 906 heads, home port vs. "Pro" job
[Re: ccdave]
#29382
08/30/06 11:54 PM
08/30/06 11:54 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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OP
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Mr. P body, the stock 906's ive tested have flowed from the mid-220's to as well as the high 230's with no porting. just depends on the head. most std exhaust ports are in the low-mid-150's.
CCDave, it basically took me 2hrs per head to update the porting. its about 30mins per cylinder, and thats broken down to about 22mins per intake port, 8mins per exhaust(in this instance), and about 15-17mins of what was done to the intake port was spent reshaping the short turn.
on a 346/902/452 head.....it would have been about 60-70% of that amount of time(less than 1.5hrs per head).
nonetheless, a nearly 30cfm gain on both sides of the head, well within a usable lift range, for 4hrs labor....is well worth the time and effort IMO.
the pushrod pinch area has been smoothed and blended some by whoever did the original porting. i didnt even measure the width at the pinch.....but i'll check a few of them tomorrow and see about where they are. i didnt do any additional work in that area of the head.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 906 heads, home port vs. "Pro" job
[Re: fast68plymouth]
#29385
08/31/06 12:08 AM
08/31/06 12:08 AM
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Joined: Oct 2004
Posts: 1,379 Airdrie, AB
Mills
pro stock
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pro stock
Joined: Oct 2004
Posts: 1,379
Airdrie, AB
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Dwayne - for the seats, VJ, and porting, safe to assume around $500 - $600 into the set of heads? Just asking to point out cost comparisions to Eddy heads. I'm still a firm believer that OEM heads still have their place today. You can sure tell the difference between the 2 VJ's. Whoever did them, they had a pretty wide seat from the looks of the pic. Great post as usual ![](/ubbthreads/images/graemlins/thumbs.gif)
1967 Satellite, CNC Eddy Headed 500ci Street Mauler (Dyno'ed @ 600 HP / 650 ft-lbs)
2016 Challenger Hellcat - Holy Hell 2012 Hemi Ram Sport Crew Cab 2011 Avenger, Pentastar V-6 2007 SRT-8 Charger (Dyno'ed @ 470 RWHP) 1986 Caravelle, 318, aka "Rosco", Back Road Burner!
ALL Black...Bad Boys always wear Black!
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Re: 906 heads, home port vs. "Pro" job
[Re: fast68plymouth]
#29386
08/31/06 12:16 AM
08/31/06 12:16 AM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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the numbers....side by side
intake port:
lift----B/A---gain .100--73.1/69.5-- -3.6 .200-133.7/145.5- +11.8 .300-196.4/208.5- +12.1 .400-237.1/257.9- +20.8 .450-241.9/270.7- +28.8 .500-240.3/265.9- +25.6 .550-243.5/269.1- +25.6 .600-241.9/270.7- +28.8 .650-233.9/267.5- +33.6 .700-230.7/261.5- +30.8
exhaust port:
lift----B/A---gain .100--55.9/56.3-- +0.4 .200-112.3/112.3- +0.0 .300-151.5/158.4- +6.9 .400-163.5/179.2- +15.7 .450-167.4/187.1- +19.7 .500-168.7/189.7- +21.0 .550-168.7/194.9- +26.2 .600-167.4/197.5- +30.1 .650-167.4/201.4- +34.0 .700-166.1/204.1- +38.0
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 906 heads, home port vs. "Pro" job
[Re: Mills]
#29387
08/31/06 12:24 AM
08/31/06 12:24 AM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
OP
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OP
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Joined: Jan 2003
Posts: 14,515
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Quote:
Dwayne - for the seats, VJ, and porting, safe to assume around $500 - $600 into the set of heads?
Mills.....the price to update these heads is going to be about $580-$600.
-disassemble heads, flow test -install hardened exhaust seats -machine seats and bowls -back cut intake valves -4hrs porting + additional flow testing -wash heads & parts, assemble, set spring pressures
if they were being done from scratch, to this same level of modification(parts and labor), they would easily cost a few hundred more than a new set of E heads.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 906 heads, home port vs. "Pro" job
[Re: fast68plymouth]
#29389
08/31/06 12:51 AM
08/31/06 12:51 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Great info Dwayne. ![](/ubbthreads/images/graemlins/thumbs.gif) These are my 906 heads on my 63 that I did and installed the 2.14 and 1.81 valves. Hope they work good enough to beat my boys Dart. ![](/ubbthreads/images/graemlins/biggrin.gif) Ron ![](http://pic7.picturetrail.com/VOL188/1011563/2193145/122523029.jpg)
Last edited by 383man; 08/31/06 12:52 AM.
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Re: 906 heads, home port vs. "Pro" job
[Re: fast68plymouth]
#29391
08/31/06 02:37 AM
08/31/06 02:37 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
this is what the finished job looks like. i didnt do anything to the port openings because at this stage of the game, thats purely eye candy.
What have you found as far as "results" on a high-polish in the combustion chambers ?
Or is that just eye-candy ?
And on a typical 906 or 452 ....what is the diff in CC's in that chamber ....dead-stock vs highly polished ?
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Re: 906 heads, home port vs. "Pro" job
#29392
08/31/06 03:08 AM
08/31/06 03:08 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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no big deal but would be nice if the poster/teacher could make ALL his posts/points one right after the other BEFORE any other comments are posted. sort of like a professor gives his lesson and then opens it up for debate. no big deal though - good info. ![](/ubbthreads/images/graemlins/thumbs.gif)
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Re: 906 heads, home port vs. "Pro" job
[Re: tpabayflyer]
#29395
08/31/06 07:15 AM
08/31/06 07:15 AM
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Joined: Jan 2003
Posts: 17,926 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
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Quote:
This is archive material for sure... TBF
Yepper.
Soon as the chatter dies down it's going to get moved!
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Re: 906 heads, home port vs. "Pro" job
[Re: mark_gates]
#29399
08/31/06 01:16 PM
08/31/06 01:16 PM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
How many other head porters would take you step-by-step thru his process, explaining with pics what, how and why he does what he does? That's intellectual property ! Thanks Dwayne, for your unselfish contributions. As always, you da man!
I agree""
I myself made the classic mistake of not touching the short turn. Dwayne unselfishly showed me what I did wrong and even fixed a port for so I could use it as a example to fix the rest. Great guy my hats off to him. mike
73 Sport 440, 509 cam w/Eddys 3.91 and 28.1"/27.3 tire. Et. 60 ft. 1.435, 1/8th. 6.61 @ 101.80 mph. 1/4. 10.472 / 127.78 mph. 2950# race/with me,and pump gas.
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