Re: Some stage 6 stuff
[Re: fast68plymouth]
#2424096
12/26/17 09:03 PM
12/26/17 09:03 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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The earliest ones were pretty famous for porosity.
The ones I've worked on of this vintage often have plenty of issues...... But that hasn't been one I've come across...... Yet.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Some stage 6 stuff
[Re: fast68plymouth]
#2424344
12/27/17 12:59 PM
12/27/17 12:59 PM
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Joined: Jan 2003
Posts: 13,385 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,385
Marion, South Carolina [><]
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Thanks for the post Dwayne! Your work looks awesome as always. I love seeing these posts even if it's something that I will never have to worry with (hopefully).
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Some stage 6 stuff
[Re: dart9ss]
#2426431
12/31/17 04:53 PM
12/31/17 04:53 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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When I saw the subject of this t read, I didn't know if I should or and watch the story unfold. If the owner is using the MP Stage VI RB 4150 intake manifold, he needs to look into getting it reworked to really see the benefits of the improved heads. Out of the box, it leaves a LOT to be desired.
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Re: Some stage 6 stuff
[Re: fast68plymouth]
#2426472
12/31/17 05:13 PM
12/31/17 05:13 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
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Brad......refresh my memory.
Doesn’t the stage 6 manifold really have MW sized runners, and is shrunk down where it bolts to the heads?
That’s how I remember it.......but I haven’t looked at one in several years.
If that’s how it really is, and one was looking for the “next step” in improving the flow into the motor........I would think opening it up, and then making the heads MW size to match would make the most sense. I think you’d probably have to make a step up from the 509 cam to really see much benefit though.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Some stage 6 stuff
[Re: fast68plymouth]
#2426625
12/31/17 07:42 PM
12/31/17 07:42 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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... Finished flow numbers:
Lift-------in/ex----ex w-2" tube .100---71.3/61.5 .200--149.2/115.9 .300--211.2/157.8 .400--267.4/179.3 .500--306.7/193.2---221.1 .550--319.7/199.3---226.8 .600--318.6/205.4---236.2 .650--320.5/209.8---241.9 .700--321.6/213.9---248.3
FWIW, Dwayne's last test on my old hand-ported Stage VIs: Stage VI test #1 cylinder: Lift -- Int / Exh (no tube) .100 --- 69 / 53 .200 -- 143 / 108 .300 -- 213 / 146 .400 -- 262 / 181 .500 -- 293 / 211 .550 -- 305 / 222 .600 -- 307 / 231 .650 -- 307 / 237 .700 -- 307 / 243 And these were good enough for 600+ HP on a pump-gas 440 w/ the right combination of parts. However, the subject heads are going on something quite a bit different, from the sound of things.
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