Re: flownrs RHS sb!!!
[Re: sshemi]
#1041976
07/28/11 10:40 AM
07/28/11 10:40 AM
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Joined: Aug 2004
Posts: 2,128 sweden
sshemi
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sweden
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Re: flownrs RHS sb!!!
[Re: sshemi]
#1041977
07/28/11 10:41 AM
07/28/11 10:41 AM
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Joined: Aug 2004
Posts: 2,128 sweden
sshemi
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OP
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Re: flownrs RHS sb!!!
[Re: sshemi]
#1041978
07/28/11 10:41 AM
07/28/11 10:41 AM
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Joined: Aug 2004
Posts: 2,128 sweden
sshemi
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Re: flownrs RHS sb!!!
[Re: sshemi]
#1041983
07/29/11 06:05 AM
07/29/11 06:05 AM
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Joined: Jan 2003
Posts: 3,943 Melbourne.....Oz-land
Moparmal
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Joined: Jan 2003
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Melbourne.....Oz-land
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So IMM claim 277 @ .600 with a 2.02 valve and a port job Shady gets 296 @ .500 .... with a slightly bigger valve but less porting , ....would I be out of line if I said thats a cr@pload of unexplained difference???
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Re: flownrs RHS sb!!!
[Re: Moparmal]
#1041984
07/29/11 08:38 AM
07/29/11 08:38 AM
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Joined: Feb 2006
Posts: 1,051 The Great White North
RAMM
super stock
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super stock
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The Great White North
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I'm working on a set of EQ Magnum's right now. This will be a fairly serious porting effort IMO so I would be willing to share. Here's some flow data from my last set of EQ Magnum's:
SF-1020 4.03" bore 28" 2.055/1.6 Ferrea's .1 66.3 .2 126 .3 182.2 .4 227 .5 255 .55 262 .6 267 These heads were not "all-out ported" by any means and were targeted for a very hot stock stroke 360 street build. BTW @ 363 cubes, 10-1 comp, hydro-roller, dual-plane, 91 octane, etc.... 478 hp 490 ft/lbs! J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: flownrs RHS sb!!!
[Re: 67_Satellite]
#1041988
07/29/11 08:52 AM
07/29/11 08:52 AM
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Joined: Aug 2004
Posts: 2,128 sweden
sshemi
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Quote:
What is the cross sectional area at the smallest point of the push rod pinch? I had always heard that this was the choke point on this type of head. Opening it up there could account for much of the flow increase.
I havent measured it but i did install sleeves in the holes. The p-r holes in these heads are bigger than the production sb head. So i did the sleeves with the same inner dia as a prod head (1/2") Think the p-r holes where 5/8" on these heads. I could have made the port entrance a little bigger but since i have like 10 pairs of the standard felpro gasket at home thats what i used.
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Re: flownrs RHS sb!!!
[Re: Moparmal]
#1041989
07/29/11 08:54 AM
07/29/11 08:54 AM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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Quote:
So IMM claim 277 @ .600 with a 2.02 valve and a port job
Shady gets 296 @ .500
.... with a slightly bigger valve but less porting ,
....would I be out of line if I said thats a [Email]cr@pload[/Email] of unexplained difference???
I don't think it's shady dell (RyanJ) doing the porting, but they were who they were purchased from set up...
different benches, depends on what fixture/clay form was put on the entrance, correction factors for pressure, etc...
I think the .122" bigger bore plate (4.125 vs. 4.030 which is what most guys use for SB heads) probably inflates the numbers by 10cfm due to less valve shrouding.
Last edited by patrick; 07/29/11 08:56 AM.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: flownrs RHS sb!!!
[Re: patrick]
#1041990
07/29/11 09:39 AM
07/29/11 09:39 AM
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Joined: Jul 2006
Posts: 4,595 On the south side of Nowhere
S/ST 3040
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On the south side of Nowhere
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Quote:
I think the .122" bigger bore plate (4.125 vs. 4.030 which is what most guys use for SB heads) probably inflates the numbers by 10cfm due to less valve shrouding.
On a head like this, I'm sure 10 cfm is too much to expect. W-7 and up with 2.120"+ valves, I would believe.
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Re: flownrs RHS sb!!!
[Re: S/ST 3040]
#1041991
07/29/11 11:41 AM
07/29/11 11:41 AM
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Joined: Jan 2003
Posts: 5,486 SoCal
Brian Hafliger
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Posts: 5,486
SoCal
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I absolutely HATE fat short turns! LOL...
I just ported 3 sets of these damn things, with our 2.02 valves and they flow 276@ .500, 285@ .550 and 290@ .600 and then fall back to 287 past .600 lift. That's porting the pinch area, the bowl and guide boss, and laying the short turn back ALOT.
On pump gas 410's we're making around 520's for HP with either hyd. roller cams or solid FT cams, rpm intakes, 950HP's and small TTI headers. Compression is still only 10:1 or 10.2:1.
We'll be building/dyno testing a mild 360 with our RHS heads with no porting in the next 3 weeks so I'll post our findings since there is very little info about smaller engines with the RHS heads. Brian
Brian Hafliger
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