Re: Some misc. BB Victor / Procomp head pics
[Re: BradH]
#1734450
01/22/15 02:37 AM
01/22/15 02:37 AM
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Joined: Mar 2003
Posts: 9,100 Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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Quote:
Re: installed height - Mine are right at 1.900" w/ the combination of ti retainers & 10* locks that Porter Racing provided me along w/ the springs & cam I got from him. I'd have to go look at the packages to see if the locks are the +.050" installed-height style or not. I don't recall seeing much variation between intake & exhaust height w/ Hughes valve seat work done in conjunction w/ their CNC porting.
Re: rocker shaft studs - Yeah, the Hughes studs are a little shorter than I'd like; I bought a couple of sets of ARP studs from AndyF when he still had some extras and they're a bit longer. Andy supplied them as kits, so I can't give you the individual part #s for the long & short studs he included.
Re : <Installed height> I hate to do this to you but 1.900" how? Is there a spring seat or cup? How thick is it? I take it you are staying under .700 lift? As far as the valve heights from my measuring both valves are 5.350" and the exhaust has a bit less installed height due to a larger distance from the margin to the face in comparison to the intake. I'm always happy to get a second opinion.
Re : <Studs> I worked with ARP and went through every stud they had that were a combo of 3/8 fine and coarse. We the studs you got from Andy F coarse threaded on both ends by chance?
Do you want me to post pics of my ports or just continue badgering you with questions related to this head but not related to your post?
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Re: Some misc. BB Victor / Procomp head pics
[Re: Jeremiah]
#1734451
01/22/15 06:00 AM
01/22/15 06:00 AM
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Joined: Dec 2014
Posts: 100 KS
Cogito
member
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member
Joined: Dec 2014
Posts: 100
KS
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I'm following your work and appreciate you sharing your results.
I opened my entries up to 2.45 x 1.3...basically as large as I felt comfortable going w/ the standard port Vic intake. If I remember correctly, this allowed min x-sxn to move further downstream.
I'll share pics of where I'm at w/ mine later today.
No flow #s yet...will do when vj is performed. Also have a few pics side by side w/ an LS 821 (rect port) casting I did some work on...interesting to compare the two...
Last edited by Cogito; 01/22/15 06:03 AM.
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Re: Some misc. BB Victor / Procomp head pics
[Re: Cogito]
#1734453
01/22/15 02:22 PM
01/22/15 02:22 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Cogito - My "standard port" Hughes CNC heads are 2.40 x 1.30, and they're pushing the limit for being able to match a non-MW intake manifold w/o needing to weld additional material (depends on intake).
What's the LS 821 (rect port) casting? Is that based on an LS-3 or LS-7? I've looked fairly closely at both of those Chevy heads, too.
EDIT: Added (semi-crappy) pic of intake runners for my original Hughes CNC heads mentioned above.
Last edited by BradH; 01/30/15 05:43 PM.
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Re: Some misc. BB Victor / Procomp head pics
[Re: Sport440]
#1734454
01/22/15 02:23 PM
01/22/15 02:23 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
I lost interest when "YOU" didn't even respond to your "OWN" thread, that I posted to about the same two heads, just abit ago. Maybe others did too.
Understood. Sometimes I even bore mysel.....zzzzzzzzzzzzzzzzzzzzzzz
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Re: Some misc. BB Victor / Procomp head pics
[Re: dogdays]
#1734456
01/22/15 03:50 PM
01/22/15 03:50 PM
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Joined: Apr 2005
Posts: 1,505 TN
SCATPACK 1
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,505
TN
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Me too. I like following the usefulltech stuff you are providing. Thanks for sharing your info and work. More pictures please. thanks Jerry
Old Geezer Racing
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Re: Some misc. BB Victor / Procomp head pics
[Re: BradH]
#1734460
01/30/15 03:27 PM
01/30/15 03:27 PM
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Joined: Jan 2003
Posts: 17,892 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,892
S.E. Michigan
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Hey, cool. (Nothing of any value to add, just doing my monthly log in...you've gone so far into cylinder heads I just barely even know what you're talking about anymore )
Rich H.
Esse Quam Videri
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Re: Some misc. BB Victor / Procomp head pics
[Re: BradH]
#1734461
01/30/15 04:04 PM
01/30/15 04:04 PM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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Quote:
Just a FWIW, here's a shot of the new Trick Flow PowerPort 240 BBM head's chamber. There are things about this chamber that I like even more than the Hughes-CNC'd later version of the Victor I showed above (e.g., plug location, the chamber contours where the valve seats transition into the chamber near the plug), but it's still only a standard-height port, etc.
Do you know of a chamber cc change with the polish,laid back angle by the valves?
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Re: Some misc. BB Victor / Procomp head pics
[Re: BradH]
#1734465
01/30/15 06:04 PM
01/30/15 06:04 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
This is not a "better" vs. "worse" comparison, but simply a case of how two different approaches to the same basic port turned out.
These are the last results for the Procomp port shown in pictures vs. the average for all 8 ports of my older Hughes CNC-ported Victors:
--------- PC ------ HE- .100 - - 67.9 - - - 71.1 .200 - - 140.9 - - 153.6 .300 - - 201.2 - - 221.6 .400 - - 261.7 - - 273.1 .450 - - 289.4 - - 294.1 .500 - - 312.7 - - 310.2 .550 - - 330.6 - - 322.7 .600 - - 342.1 - - 336.3 .650 - - 340.1* - 343.0 .700 - - 344.0 - - 346.1 .750 - - 347.8 - - < No gain > .800 - - 351.6 - - < No gain >
* Showing signs of flow separation / test pressure manometer instability
Wanna drive yourself nuts? Check out this article where a bunch of different Chevy LS3/LS92-type heads were tested on the same engine HERE!
If you look over all the different flow tests vs. HP & Torque results for each head, it should become really clear that there's no "for sure" improvement simply because one head flows more than another.
Yeah, the BIG HP # came from the best flowing head tested (an aftermarket replacement version w/ some extra tricks), but the rest of the ported heads were all w/in about 15 HP of each other, despite the flow #s across the lift ranges varying significantly between different heads.
Maybe being an amateur hack means I don't see any "obvious" trend of why certain heads did better than others, but I'll admit I really don't. It's not like there are huge difference in runner volumes, either, that might account for why some higher-flowing heads might have given up velocity to other lower-flowing ones.
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