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Re: Teaser...the RHS & EQ heads are here!! UPDATE...
[Re: cudadoug]
#624786
02/28/10 02:29 PM
02/28/10 02:29 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
Quote:
Who supplied the heads?
I'd rather not say...that WOULD be taking a jab at someone. Chalk it up to not all flow benches agree. Or some aren't even close...LOL!
Thanks Brian for that info...I appreciate it.
Really? That's not taking a shot it's reporting your findings. Which after some light work, you got numbers similar to others. I guess people should become comfortable in buying things and not getting what they pay for. You clearly didn't get what you expected from the provider, correct?
To me, it's more about finding out if your stuff is an anomoly or they have a happy bench compared to others. Look at the hughes numbers for an RHS X head with a 1.92... That's some happy numbers, 263 at .600 with a +/- 6 cfm variation. 275 at .700???
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Here they are straight from their site.
RHS "X" Heads
(LA & Magnum heads use the same ports)
Stock with 1.92" int and 1.60" Exhaust
Lift intake Exhaust
.100" 66
.200" 116 91
.300" 177 138
.350" 203 155
.400" 224 167
.450" 239 171
.500" 252 174
.550" 262 176
.600" 263 178
.650" 263 179
.700" 275 179
Note: These are average numbers.
Stock ports can vary by +/- 6 cfm in the same head.
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Re: Teaser...the RHS & EQ heads are here!! UPDATE...
[Re: cudadoug]
#624787
03/01/10 11:48 AM
03/01/10 11:48 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
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Flow results from today on the RHS 2.02 head...
{snip}
Chambers measures at 62.5
Pretty good bang for the buck, I'd say. The as supplied valve job was VERY conservative, leaving quite a bit of margin at the valve edge. We're going to spend about 8 more hours this week and rub on the guide areas some more and correct the VJ and we'll find more flow, I'm sure. 
the supplied VJ better be very conservative for a 2.02 valve, since all the literature I've seen for them is that they use a stock magnum 1.92" valve diameter OOTB.
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: Teaser...the RHS & EQ heads are here!! UPDATE...
[Re: patrick]
#624788
03/01/10 01:14 PM
03/01/10 01:14 PM
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Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
cudadoug
OP
master
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OP
master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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It would have been good to see your numbers with the 1.92 valves in both the EQ and RHS heads as a baseline. If I remember right my stock RHS castings went 238 @ .500 with the 1.92 on the "as-supplied" seat. Your numbers seem pretty good for the bigger valve and valve job.
-dulcich
Yea, in hindsight (isn't that always 20/20?) we should have started with the 1.92, as I am now curious. We'll get to the EQ's, but I'm hearing 240-ish with a 1.92 and about 10-15 more with a 2.02, depending on the VJ from most everyone I ask.
Further update: We grabbed the other untouched (by us) "as supplied" head and moved the valve job to where it should be and here's what we got for the upper numbers: Lower numbers improved by the same % in at most lifts...
262.1 @ .500
263.3 @ .550
263.8 @ .600
Last edited by cudadoug; 03/01/10 02:37 PM.
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Re: Teaser...the RHS & EQ heads are here!! UPDATE...
[Re: cudadoug]
#624789
03/01/10 03:31 PM
03/01/10 03:31 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
It would have been good to see your numbers with the 1.92 valves in both the EQ and RHS heads as a baseline. If I remember right my stock RHS castings went 238 @ .500 with the 1.92 on the "as-supplied" seat. Your numbers seem pretty good for the bigger valve and valve job.
-dulcich
Yea, in hindsight (isn't that always 20/20?) we should have started with the 1.92, as I am now curious. We'll get to the EQ's, but I'm hearing 240-ish with a 1.92 and about 10-15 more with a 2.02, depending on the VJ from most everyone I ask.
Further update: We grabbed the other untouched (by us) "as supplied" head and moved the valve job to where it should be and here's what we got for the upper numbers: Lower numbers improved by the same % in at most lifts...
262.1 @ .500
263.3 @ .550
263.8 @ .600
so it sounds like the "as supplied" heads have the stock RHS valve job for a 1.92" valve, but supplied with a 2.02?
kinda like OEM mag head valve jobs are typically undersized to the point where a 1.88/1.6 valve will work in the stock valve job?
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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