Small Block Heads...

[RogerH]

I noticed on the small block cylinder heads that the rocker arm hole is right in the way of the intake port. Does anyone make a aftermarket head with a offset rocker?

If not, is anyone interested in a head with a offset rocker to make room for a larger intake port opening??

[Thunderstruck]

Try looking at a set of W2 or better heads.

Steve

[rumblefish360]

Not haveing the bump in the way would be nice if it was from the factory. It's a problem with the design of having all the valve in a single file. Offset rockers help this. It dosn't make it disapear. Theres only so much to grind away till you make a hole. Then you have to fix/rebuild the wall.
The intake port will flow enuff for all but a racer looking to really fly. Heres an example. MoPar catolg P# P4876180 is a full port 360 head w/2.02/1.60 valves that flow275 cfm @ .600 lift.
This lift can be had with 1.6 ratio rockers and still have a streetable duration.
A basic and maybe lame mans way (Not that it's wrong are a bad way or totally inacurate way) to calc HP through cfm flow is double the cfm of the head. All things being max out for this of course. Theres a potential of 550 HP. Even more really.
W-2 heads have more potentail than this. There a race head, yea. But entry level by todays standard. With offset rockers.
W-9's become scary, by comparision to stock head flow. Only to be toped by the new series of cyl. head starting with P.
The new P-5 and P-7's. Go getcha self a look at those babys.
(If I had a million dollors....)

[RogerH]

rumblefish -

Well, I am not in charge of making a new cylinder head, but I am trying to push to change it. I am making a new intake manifold for the small block chrysler for a fuel injection kit. This being the first time looking at a small block chrysler, it just seems really odd that there is that huge bump in the middle of the intake runner inlet. That's why I came here, to see if anyone knows if someone already makes a head that offsets the rocker arm to eliminate the bump.

I would like to go to my boss and ask to change our current head and make an offset rocker to open the intake port opening.

If he doesn't like the idea, maybe everyone here who is interested in the idea can write them directly...since they don't like to listen to us engineers, but potential customers is way different!

Roger

[Ausydad]

Hey Roger,
Since you're in Torrance, I have to assume you're working for Edelbrock. If so, how 'bout asking them to make a non-fuelie intake for the magnum head conversion a lot of these guys are doing, or even reasearching the right carb linkage on a Mopar so we can have one that works? Just a couple of thoughts, that's all.

[451Mopar]

Indy Cylinder heads has a small block head that is designed with the offset rocker arms. If I rember correctly, Indy worked with Edelbrock to have Edelbrock special make the rough castings, then Indy finishes them.

The offset rocker takes care of the pushrod "hump" at the enterance of the intake port, but not the rocker stand bump on the roof of the port (if there is one?) I do know that the rocker arms get their oil supply from the "second in" rocker stands, so there must be an oil passage between the intake ports, but it goes off at an angle to the rocker stand.

[RogerH]

Ausydad -

Yep, you are correct about my location. ;-) Unfortunately, I am the last person you should be reccomending products to, since they don't listen to me, or other engineers, about new products. Best bet is to send them an email or call the tech department. The more people you can get to call and ask to make a certain product, the more likely of a chance you will see it done!

I am working on a 440 EFI kit right now, with a small block on the drawing board. Then we'll have to see if we get anyone crying for a 383 system. The small block will fit a 340 & 360, and also a 318 with 340 heads.

[David D]

A possible way around the low deck/ raised deck problem for your 440 kit is to tool the intake for a low deck and use spacers when installing the system on a raised deck engine. This kind of thing has been done before. Lot of guys out there doing low deck stroker engines as 400's are dirt cheap and plentiful.

[Best Machine]

Rodger
The orig 70 - 71 T/A heads had factory offset rockers and the orig pushrod hole moved so you could remove the bump completly. The pushrod hole was moved about 3/8 of an inch.


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