RHS flow #'s

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Do you smooth/deshroud the chambers at all or is that extra? Those intake valves are pretty close to the chamber sides and the edges look pretty sharp. Got any lower-angle pics that show the depth of the chambers a little more?

EDIT: What size are the intakes in those pics?
 
I have another semi-related question for anyone in the know: Do these heads use OEM-type bolts or studs??

Thanks. Now back to your regularly scheduled RHS flow info...
 
MOPEkidD-3 said:
Do you smooth/deshroud the chambers at all or is that extra? Those intake valves are pretty close to the chamber sides and the edges look pretty sharp. Got any lower-angle pics that show the depth of the chambers a little more?

EDIT: What size are the intakes in those pics?
Click to expand...

Actually the valves are quite far from the chamber...what your seeing is an optical illusion. There is plenty of room between the valves and chamber. What's more important for flow and HP is how they are laid back behind the intake valve. Lots of room there!
Intakes are 2.02.
 
dusterdoug said:
I have another semi-related question for anyone in the know: Do these heads use OEM-type bolts or studs??

Thanks. Now back to your regularly scheduled RHS flow info...
Click to expand...

They use magnum type bolts I believe. I can verify that tomorrow. I had a bunch of OEM head bolts for this mag build, and I used the extra long head bolts that each LA head would use at the oil hole/bolt hole junction.

Bottom bolts are std. length.
 
Sorry Brian, I didn't ask the complete question: Do they take OEM bolts (or studs for OEM heads) on the LA version??
 
When I put the LA/RHS heads on the 410 I just completed I had to order 10 longer 5.75" Studs from ARP to work on the intake side. The smaller studs were the same as OEM. ARP Direct is awesome. Next day delivery! I have checked around and I dont know of anyone who MAKES a bolt or stud kit to work with these heads BUT that was over 6 weeks ago. They may make them now. I would think that OEM MAGNUM Head Bolts would work on both the LA and MAGNUM versions of these Heads since there are only 2 lengths needed.

FYI-- I have the Magnum Version and the LA Version of the RHS heads. The head bolt bosses are the same on BOTH! So they would use the same length studs or bolts.
I have yet to use bolts. I stud ALL my heads, I am weird that way.
 
1wild&crazyguy said:
so they are magnum bolts/studs that are needed, right?
Click to expand...

I will find out today and let you guys know if the Magnum stuff will work. Louis is right both heads are the same except for: intake bolt pattern and one uses studs and the other uses shafts. Everything else is the same!
 
It is possible to have the intake pattern DUAL DRILLED to accept both the LA and Magnum intake manifolds on the MAGNUM Based RHS HEADS or ANY Magnum head. The first set I got were done that way.
 
Hey brian, I have my old 340 on the stand and I'm wanting to dyno it and see what it makes. It's just a .030 kb hyper,.528 solid,1.6 rocker, ported Xheads/242/189-clay radius & no flow pipe w/1 5/8 headmans,single plane and holley 750cfm.
It feels like 430-440'ish hp but we know that go's....

How much?
 
360moparjunkie said:
Brian,
These heads being 62 or 63cc's. Does it cost extra $ ontop of the 1295.00 to have the combustion chamber enlarged to 66cc's?
Click to expand...

To get that chamber volume up I drop the valve job .025 on both valves. It's 50.00 more. That makes them usable on flattop 360's zero decked.
 
1wild&crazyguy said:
Hey brian, I have my old 340 on the stand and I'm wanting to dyno it and see what it makes. It's just a .030 kb hyper,.528 solid,1.6 rocker, ported Xheads/242/189-clay radius & no flow pipe w/1 5/8 headmans,single plane and holley 750cfm.
It feels like 430-440'ish hp but we know that go's....

How much?
Click to expand...

Well that depends on the dyno! On my dyno I'd say 410...
 
rumblefish360 said:
$550 for all day?
Click to expand...

ALL DAY...
We load the engine on at 8:00a.m. and fire it around 9:30'ish. Break for food if no problems exist around 1:00p.m. and final pulls done by 4:00p.m. at the latest.
That's a typical dyno day....I've had engines on there that did not fall under those guidelines!!
 
The 410 RHS headed stroker Brian built moves his Orange Duster pretty good.

Had a pretty cool ride in it today. The engine with a 3500 converter and 4.56 gears gets that car rolling.
 
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