RHS LA Heads

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USCG CHARGER said:
Not a bad price at all for what ur giving..what about a stock RHS head made to fit my cam? whats the cost for that?

I mean @ $1200 I can get the eddy heads for $200 more right?..lol
Click to expand...

I think you can get the eddy heads for that, and not a bad way to go either. But they flow a bit less than these, they usually need a valve job right OOTB due to seat runout being in the .005+ range. Guides can be tight, not always but they can be.
They do have springs that work with your cam, but not the quality of the Comp beehive's and 10° retainers/locks.
I could use similar spring setup on the RHS heads and it would save you about 90.00 but to me it's not worth it.
The valves I sell are Ferrea 6000 series which are much better than the eddy valves but for your application you don't need the Ferrea's.

I guess you just have to decide which fit's your budget and choose which way you'd like to go.
The RHS heads have a great chamber compared to the LA eddy head. If you go with the Magnum Eddy you'll be stuck with Mag. valve train.

Best of luck!!
 
ou812 said:
I think you can get the eddy heads for that, and not a bad way to go either. But they flow a bit less than these, they usually need a valve job right OOTB due to seat runout being in the .005+ range. Guides can be tight, not always but they can be.
They do have springs that work with your cam, but not the quality of the Comp beehive's and 10° retainers/locks.
I could use similar spring setup on the RHS heads and it would save you about 90.00 but to me it's not worth it.
The valves I sell are Ferrea 6000 series which are much better than the eddy valves but for your application you don't need the Ferrea's.

I guess you just have to decide which fit's your budget and choose which way you'd like to go.
The RHS heads have a great chamber compared to the LA eddy head. If you go with the Magnum Eddy you'll be stuck with Mag. valve train.

Best of luck!!
Click to expand...

ok thanks for the info.. You have a customer in me when I make my decision..One good thing with the eddy head is I can run more CR if i ever do a stroker down the road right?
 

I agree with Brian... RPMs always need something right out of the box. The real cost to run them is closer to $2K once they have been corrected and properly equipped. All aftermarket heads have that need regardless of manufacturer. Not always the same reasons... but always need something.
 
ou812 said:
"Quote" what is the price to set them up stock valve and stem cut to fit my cam (507 lift, 247 @.050) Would the stock version of the RHS heads out flow my 596 large valve heads? "Quote"

The 8mm valves are pretty expensive. The stock Magnum valves don't give you much installed height to allow decent lift.
If you use 11/32 valves, you still don't get much installed height.

Best option for the $$$ is the 8mm valves, beehive springs. We use 2.00 x 1.6 valves, hone the guides, cut the spring pockets for the Beehive springs and installed height, cut the tops of the guides down for up to .600 lift with a positive seal.
We do the valve job which is specific to this head and the 2.00 x 1.60 valve, and blend the valve job into the bowl.
We also backcut the intake valve, assemble the heads and check all spring's I.H. and we surface cut the heads up to .020 per customer request.
And so you know, I checked out 2 sets of heads and both came in at 67cc chambers!!!!
So beware of your compression or at least have your chambers CC'd!

Flow after all this is 258cfm at .500 lift and 264 at .550. Same at .600 lift.
Not too bad for 1200 bucks.
Click to expand...

Found this info regarding flow numbers for the RHS Head:

"We here at RHS have not done an official flow test on the heads, however INDY Cylinder heads did and these are the numbers they came up with. Again these numbers were not flow tested by RHS on our flow bench. "

Intake Exhaust
80.7 @ .100 75.6 @ .100
134.5 @ .200 135.4 @ .200
189.8 @ .300 174.8 @ .300
235.6 @ .400 193.7 @ .400
250.5 @ .450 196.8 @ .450
263.1 @ .500 198.4 @ .500
266.7 @ .550 198.4 @ .550
267.9 @ .600 196.8 @ .600

4.030 bore, 8mm stems 2.02 1.625 valves
__________________
Aaron Mick
Comp Performance Group
Technical Consultant
 
bongy337 said:
"We here at RHS have not done an official flow test on the heads, however INDY Cylinder heads did and these are the numbers they came up with. Again these numbers were not flow tested by RHS on our flow bench. "
Click to expand...


So they have never flowed their own stuff?? Does that even make any sense?


Wylde1.
 
I dont mean to rain on any ones parade, but for the money those numbers are not very impressive.
You need to contact Ryan at shady dell he is getting very good numbers outof the Eddys.

EDELBROCK STAGE 4 PORT WORK

LIFT------IN/EX
.100"----76.0/N/A
.200"--147.0/112.1
.300"--206.7/163.9
.400"--255.3/193.2
.450"--274.3/203.6
.500"--279.0/212.2
.550"--285.0/218.0
.600"--293.2/226.3
.650"--293.2/229.4
.700"--293.2/230.8

All #'s at 28" of H20.
Ported head was flowed with 2.05" FERREA valve with 30 degree back cut on intake valve, and no flow tube on exhaust.

For more information about Edelbrock cylinder head porting email RyanJ@shadydellspeedshop.com

Andrew
 
blue missile said:
I dont mean to rain on any ones parade, but for the money those numbers are not very impressive.
You need to contact Ryan at shady dell he is getting very good numbers outof the Eddys.

EDELBROCK STAGE 4 PORT WORK

LIFT------IN/EX
.100"----76.0/N/A
.200"--147.0/112.1
.300"--206.7/163.9
.400"--255.3/193.2
.450"--274.3/203.6
.500"--279.0/212.2
.550"--285.0/218.0
.600"--293.2/226.3
.650"--293.2/229.4
.700"--293.2/230.8

All #'s at 28" of H20.
Ported head was flowed with 2.05" FERREA valve with 30 degree back cut on intake valve, and no flow tube on exhaust.

For more information about Edelbrock cylinder head porting email RyanJ@shadydellspeedshop.com

Andrew
Click to expand...
Pay attention:banghead:, those RHS flow #s were out of the box, not all out stage 4 porting.
 
blue missile said:
I dont mean to rain on any ones parade, but for the money those numbers are not very impressive.
You need to contact Ryan at shady dell he is getting very good numbers outof the Eddys.

EDELBROCK STAGE 4 PORT WORK

LIFT------IN/EX
.100"----76.0/N/A
.200"--147.0/112.1
.300"--206.7/163.9
.400"--255.3/193.2
.450"--274.3/203.6
.500"--279.0/212.2
.550"--285.0/218.0
.600"--293.2/226.3
.650"--293.2/229.4
.700"--293.2/230.8

All #'s at 28" of H20.
Ported head was flowed with 2.05" FERREA valve with 30 degree back cut on intake valve, and no flow tube on exhaust.

For more information about Edelbrock cylinder head porting email RyanJ@shadydellspeedshop.com

Andrew
Click to expand...

You are talking about a FULLY PORTED HEAD that will cost 3x the amount of what we are talking about here. And in my opinion those numbers for the cost at .550 lift are WEAK for the amount of $$ you will have in them 21CFM difference for 3x the cost, I dont think so. STAGE 4 My :bootysha:
 
I'll add that the only stage 4 set of RPMs I've used could not repeat his numbers on two other benches. Close, but about 8cfm short at best. And IIRC the cost is several times that $1200 figure ready to run.
 
So, were the shady dell SB heads flowed using a 4.25 bore fixture???

I know that's been what he's used for a long time. Puffs the numbers just a bit. Nobody else that I know of uses a 4.25 fixture for SB mopar stock block based stuff. IMO, R block stuff you might use that bore fixture, not on a factory 340/360 based block w/ 4.00-4.10 bore.
 
I went back and looked at the spread sheet and the total cost for the set of heads with stage 4 machining by Ryan was under $2000.
Andrew
 
blue missile said:
I went back and looked at the spread sheet and the total cost for the set of heads with stage 4 machining by Ryan was under $2000.
Andrew
Click to expand...

What spread sheet are you talking about? Just the cost of the heads alone along with the price for a stage 4 port job would be more than $2k and if you read the paragraph about stage 4 porting it states it also requires a 4-5 angle valve job. Plus there's the cost of bigger valves, seals, cleanup and assy. I went to his site and priced services and here's what it looks like it would cost at a minimum

Head $1400 (that's just my best guess on the price of heads as I didn't actually look them up).

Stage 4 porting $825

4-5 angle valve job that's required with a stg 4 port $150

Open valves up to 2.05" if no seat is required $75 If new seats are required add $21

Cut guides and pads to accept dual springs (it isn't stated this is required but who would ever do a stage 4 port job without needing dual springs?) Price for this is $50

Clean heads after work $30

Assemble heads $50

Oversize Ferrea intake valves: not sure of the price on this one but I'd guess at least $150

Valve seals $20

Total so far is $2750-2771 and that includes no shipping which will most likely be necessary.

Other possible things needed that may add to the cost

Ream valves guides to proper size $95 (note this should be checked on all Eddelbrock heads as they are known for not them being too tight quite often)

Milling to true up the sealing surface $100 per set

Flow testing @ $20 per cylinder

I'm no expert on this stuff so there may be something I missed also but it sure looks to me like the absolute minimum price would be about $2750 for a set of stage 4 ported Eddy's and more than likely at least a couple hundred more putting it right at the $3 mentioned earlier. I'm not saying that's a bad price for a stage 4 job but nevertheless to me it looks like Brian's job is a real good deal at $1200 total.

Also please remember you can flow test the same heads on 2 different benches and possibly see 10-20 cfm difference due to little differences like air temp and humidity, bore fixture size used, etc.. Therefore you can't race flow benches.
 
I have decided to go with a local mopar machine shop to take my 596 heads.
I will have them cleaned, new 2.02 large valves, new springs, 3 angle valve job, and bowls cleaned all for $450-$500... I was told these would flow close to what the RHS heads would flow out of the box.

Jason
 
They'll be a little shy of the RHS heads. Depending on your guy, they should end up somewhere around 230-240cfm. Cost wise that sounds inexpensive which usually means it will be on the lower end of the range. Still plenty of head for a mixed use engine.
 
That sounds REALLY CHEAP and I wouldnt expect a HUGE gain by no means.
When I said Cheap, here in California just a bowl clean up is close to $400.00 depending on where you go.
 
Thanks for all the info fellas but I dont expect the world for $450 ya know...lol.. I completely understand you get what ui pay for. I just can't see paying close to $2K for some RHS that woun't be a huge difference from what I'm gonna do for $450.
 
USCG CHARGER said:
Thanks for all the info fellas but I dont expect the world for $450 ya know...lol.. I completely understand you get what ui pay for. I just can't see paying close to $2K for some RHS that woun't be a huge difference from what I'm gonna do for $450.
Click to expand...

Where are these 2K RHS heads & whats done to them? It obviously is alot of porting & larger valves, because if anyone is paying close to 2K for "stock" RHS heads are idiots (no offence), stock they flow 240 with the 1.92 valves, with the 2.02 there around 250, but the lower lift #s are whats important, not so much the max lift. #s Hughes has these heads for 875.00/975.00 & 1100.00, i'm sure your heads for 900.00 won't come close to the 2.02 valve'd RHSs, plus you still have used heads, if i were you & your willing to spend 900.00, call Hughes engines & talk with them, for an extra 35.00 or so, you'll have a "brand new" set of heads too your door that flow better then what your getting, just don't know where your coming up with 2K RHS that compare too what your getting, there "fully ported all bells & whisles" RHSs are 2K, i'm sure they flow a hell-of alot better then 240. Here are the RHS X with LA style rockers.

http://www.hughesengines.com/Index/...cw==&level1=Q3lsaW5kZXIgSGVhZHM=&partid=25739
 
RHS's have a way better combustion chamber on them too...
 
This is great guys.. everyone who feels that I should go with these RHS heads please send coin to my paypal account coastguardboats@yahoo.com I expect to get what ever the cost is after $450.. thx fellas this place is the best! LMAO:-D
 
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