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rhs heads #947051
03/09/11 11:56 AM
03/09/11 11:56 AM
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GARAGEMAN Offline OP
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Hello, This is a dumb Question what is a rhs head, and what did they come on? I have a newer style 360 magnum engine they tell me that it has the swirl port heads on it.Are they the same as a rhs?What does rhs stand for?

Re: rhs heads [Re: GARAGEMAN] #947052
03/09/11 12:03 PM
03/09/11 12:03 PM
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Gilbertsville, PA 19525
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Re: rhs heads [Re: GARAGEMAN] #947053
03/09/11 12:09 PM
03/09/11 12:09 PM
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GARAGEMAN Offline OP
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Thanks,Are swirl port heads any good? They tell me that swirl port flow well.

Re: rhs heads [Re: GARAGEMAN] #947054
03/09/11 12:21 PM
03/09/11 12:21 PM
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detroit, mi
POS Dakota Offline
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Quote:

Thanks,Are swirl port heads any good? They tell me that swirl port flow well.




the RHS head comes in LA and magnum style and is the best smallblock head for the price PERIOD.

here is a pic of my magnums before they went on my 408....

Re: rhs heads [Re: POS Dakota] #947055
03/09/11 12:24 PM
03/09/11 12:24 PM
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GARAGEMAN Offline OP
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SO I take it swirl stock heads are not the way to go

Re: rhs heads [Re: GARAGEMAN] #947056
03/09/11 12:26 PM
03/09/11 12:26 PM
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detroit, mi
POS Dakota Offline
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Quote:

SO I take it swirl stock heads are not the way to go




Depends on what you want to do.
The stock head is NOTHING compared to the rhs head.

Mine!

Re: rhs heads [Re: POS Dakota] #947057
03/09/11 12:29 PM
03/09/11 12:29 PM
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I bought a 408 stroker at jegs it runs well but I want more. The add said It has swirl port heads, and 375hp

Re: rhs heads [Re: POS Dakota] #947058
03/09/11 12:33 PM
03/09/11 12:33 PM
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nice looking heads I wish they were mine. How much?

Re: rhs heads [Re: GARAGEMAN] #947059
03/09/11 12:36 PM
03/09/11 12:36 PM
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detroit, mi
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Quote:

I bought a 408 stroker at jegs it runs well but I want more. The add said It has swirl port heads, and 375hp




The rhs head will support well over 500 hp with the right cam and compression. WITH NO PORTING.

Re: rhs heads [Re: GARAGEMAN] #947060
03/09/11 12:39 PM
03/09/11 12:39 PM
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detroit, mi
POS Dakota Offline
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Quote:

nice looking heads I wish they were mine. How much?




There is a member on here that goes by ou812. His name is Brian. He owns IMM engines and I believe he can supply these with 2.02 valves, springs and everything except rockers for around 1400 bucks. And at that price they are a far better deal than anything else on the market.

http://www.immengines.com/

All the info you need is right there and Brian is a great guy to deal with. There is a dedicated section to the RHS head on that site.

I'll leave this alone now...he shoudl see it and clarify if I made any error.

Re: rhs heads [Re: POS Dakota] #947061
03/09/11 12:40 PM
03/09/11 12:40 PM
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IF I put those heads on my 408 stroker engine with 375 hp. what would the estimated hp be?

Last edited by GARAGEMAN; 03/09/11 01:05 PM.
Re: rhs heads [Re: GARAGEMAN] #947062
03/09/11 02:55 PM
03/09/11 02:55 PM
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Grand Haven, MI
patrick Offline
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I presume it's a blueprint engines crate motor? if so, it should have OEM magnum heads...cam looks to be a MP .474" cam. a cam change to a comp XE285HL with a spring change to hughes #1110 with hughes retainers would probably open up a lot of power...

that said, the RHS head flow ~25-30 cfm better than OEM magnums, so I'd swagger with no other changes you'd see a 40HP increase with the heads. the cam is the limiting factor right now, IMHO.


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Re: rhs heads [Re: patrick] #947063
03/09/11 04:44 PM
03/09/11 04:44 PM
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NY usa
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540challenger Offline
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Quote:

I presume it's a blueprint engines crate motor? if so, it should have OEM magnum heads...cam looks to be a MP .474" cam. a cam change to a comp XE285HL with a spring change to hughes #1110 with hughes retainers would probably open up a lot of power...

that said, the RHS head flow ~25-30 cfm better than OEM magnums, so I'd swagger with no other changes you'd see a 40HP increase with the heads. the cam is the limiting factor right now, IMHO.


The cam is a comp grind it has a split duration. Correct they use oem magnumheads however the block is an LA style not a magnum "directed to the OP". Best thing to do before you evenpurchase heads for this engine is tear it down. I along with other members of this board have had and found many problems with this engines.

Heads came with stock springs and worn out guides. Even though advestised for matching springs.

The piston rings have been found to be the wrong sizes installed.

Plus the fact they don't stand by their warranty.

If the motor was built correctly to begin with it should have been close enough a tad over a 400hp engine.

that said the RHS head are a great upgrade

Re: rhs heads [Re: GARAGEMAN] #947064
03/09/11 04:46 PM
03/09/11 04:46 PM
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SoCal
Brian Hafliger Offline
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Quote:

IF I put those heads on my 408 stroker engine with 375 hp. what would the estimated hp be?




It all depends on how the heads you have on it now compare...
If they are magnum heads already, about 30HP...if they are early LA heads, about 40-45HP easy.
Oh, and thanks Carmine (POS)!
Brian


Brian Hafliger
Re: rhs heads [Re: 540challenger] #947065
03/10/11 12:11 AM
03/10/11 12:11 AM
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Hello all,Thanks for all the help.The blueprint engine has never gave me any problems yet.no smoke valve noise, no nothing.It has been in my dart for 3years. anyways a set of rhs heads and a new comp cam and springs sould be around 425hp.I live close to shady dell so i will call him tomorrow to see what kind of deal he can give me I let everyone know. Any input on shady dell







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