Re: A few question about the E MW victor head
[Re: CSK]
#2725909
12/21/19 05:43 PM
12/21/19 05:43 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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I did a fair amount of back cut testing on Brads heads. They didn’t respond well to a long back cut.
Here is a close look at some of the ones I did for Brad way back when.
4 angles, longer top angle, bottom angle blended into bowl, no pronounced edge where the valve job ends and the bowl starts:
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: A few question about the E MW victor head
[Re: fast68plymouth]
#2725910
12/21/19 05:52 PM
12/21/19 05:52 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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It looks to me as though the CNC lines had been polished out of Dave’s heads before they were put into service.
I’ve never seen where bead blasting the heads would make the lines disappear...... so I have to assume they just weren’t there.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: A few question about the E MW victor head
[Re: fast68plymouth]
#2725913
12/21/19 06:00 PM
12/21/19 06:00 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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The bottom angle thing is probably just how it looks in the other pics I posted.
In this pic the bottom angle does seem like it’s about 60*
A lot of this stuff is hard to really assess without having it in your hands.
BTW, what did the chamber volume end up at after the milling?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: A few question about the E MW victor head
[Re: mopar dave]
#2725925
12/21/19 06:26 PM
12/21/19 06:26 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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I didn’t think you’d be changing that valve job......i’m just passing on some observations.
Is the short block zero deck?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: A few question about the E MW victor head
[Re: mopar dave]
#2725931
12/21/19 06:51 PM
12/21/19 06:51 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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There is likely “some” flow to be had by cutting the seats and some blending....... but whether or not that would show up on a time slip is another story.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: A few question about the E MW victor head
[Re: mopar dave]
#2725947
12/21/19 07:32 PM
12/21/19 07:32 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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Well...... “flowing” the heads doesn’t actually make them any better....... but at least you’d know what you have.
I looked at my notes again....... when I did my test, it was a 4 angle seat and 2.25 intake valve. So...... there could still be a 4 angle seat in one hole, but that’s not going to be representative of what the others flow with 3 angles and a smaller valve.
My notes show I tested the number 4 or 5 cylinder. So if you pull those two intake valves, one of those seats might still have the 4 angles...... although if they recut it, the 4th angle could be mostly gone.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: A few question about the E MW victor head
[Re: mopar dave]
#2725963
12/21/19 08:03 PM
12/21/19 08:03 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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If you find one seat still has the 4 angles..... what i’m saying is...... flow a different one.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: A few question about the E MW victor head
[Re: fast68plymouth]
#2725993
12/21/19 10:38 PM
12/21/19 10:38 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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Dave - Can you get any clear close-up pics of the intake valve seat?
FWIW, here's my original Hughes CNC Victor and a Chapman Stage VI. Both pics should be clear enough to zoom in to see more details of their respective valve seat configs.
EDIT: Stupid questions - what size are the intake valves... and are they all same size?
Last edited by BradH; 12/22/19 10:21 AM.
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Re: A few question about the E MW victor head
[Re: mopar dave]
#2726067
12/22/19 12:04 PM
12/22/19 12:04 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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CNC ported ProComp Victor I prepped last year:
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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