From the angle, it appears there's no lash cap on Earth that could work there without contacting the locks. But then, this is all from a picture, so who knows?
Could use some help identifying some roller rockers
- Thread starter DionR
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MOPAROFFICIAL
If it has tits, it's a liabilititty.
I had played with this kind of setup once with some J heads in mine so that I could fit a 1.80. I was younger and broke, I filed the caps to make them lil shallower because I had already ground the tips some when I set up the wear pattern of these roller rockers I was using.. got it centered.. but then a cam change necessitated more spring height and well.. tail chasing began. I ended up changing the valve job a little putting it a hair further down which actually helped and the flow department and found a kmotion spring to sue my needs...so I skipped the cap idea and theyre in a bag somewhere in one of my valvetrain parts cabinets.
PRH
Well-Known Member
I agree.
Magnum valves have very little space from the lock groove to the tip.
In my mind, a lash cap would need to have very little depth to be able to contact the tip and not the locks.
Frankly, I’d say the whole spring/retainer/lock situation on those heads needs a re-do.
Factory set up:
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MOPAROFFICIAL
If it has tits, it's a liabilititty.
Hughes drop in 1101 or whatever they are, or change the valves 'longer mag style valves' le$$..... or the whole enchilada, valves- springs -locks.
...maybe valves too, depending on what whatever cam he's running needs for sprAngs.
The valve stem length listed below had proper rocker arm contact with Chevrolet rockers on the 318B running a .550" SFT. Fitment was inspected using the 1.5 Chevrolet pushrod length checking tool and the rockers swept the vale tip fine.
The Rocker arms in your photo look like re-boxed Elgin brand.
HUG 1038A+100
INTAKE VALVE 8MM STEM 1.92" HEAD1 PIECE STAINLESS STEEL POLISHED 5.02" LENGTH
PRH
Well-Known Member
Honestly, what comes to mind is……. They were set up by someone who didn’t understand how those parts interact with each other.
It’s a failure waiting to happen.
Edit- In light of the info in post #33, it appears efforts were made to make that combo of parts work(without imminent failure).
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DionR
Well-Known Member
So my HF calipers say the valve tip is about 0.06" above the lock. I popped the cap off the neighboring valve (wasn't as stuck as I thought) and it measured 0.0495" in the cup.
The one lash cap I looked at does look like it has been messed with, but then again I'm no expert so maybe that's how they look. I will get a picture later.
The one lash cap I looked at does look like it has been messed with, but then again I'm no expert so maybe that's how they look. I will get a picture later.
PRH
Well-Known Member
If the inner depth is less than the tip protrusion above the locks, then “technically” it’s okay, if you’re comfortable with it.
The “short” hemi lash caps have an inner depth of about .110”.
The “short” hemi lash caps have an inner depth of about .110”.
I'd be skeered. That's mighty close for somethin you don't need to mess around with.
DionR
Well-Known Member
No argument. Nice thing is, I don't have any plans for these heads right now and whatever I might use them on probably doesn't need anything as "exotic" as this setup. So nothing I need to lose sleep over, at least for now.
PRH
Well-Known Member
Depending on what it was, I “might” try it on something of my own, but I’d never let something like that go out to a customer.
So when are these going on a 318 build !!!!!!?
DionR
Well-Known Member
I’m running these on my NZ EQ’s with Beehives… no issues.
www.summitracing.com
I basically copied IMM’s build with the exception for the pushrods… I measured mine and custom ordered from Smith Brothers.
Here’s the article: Dodge Magnum 360ci Small-Block Build and Dyno Test
COMP Cams 17002-16 COMP Cams High Energy Diecast Aluminum Rocker Arms | Summit Racing
Free Shipping - COMP Cams High Energy Diecast Aluminum Rocker Arms with qualifying orders of $109. Shop Rocker Arms at Summit Racing.
I basically copied IMM’s build with the exception for the pushrods… I measured mine and custom ordered from Smith Brothers.
Here’s the article: Dodge Magnum 360ci Small-Block Build and Dyno Test
Yep: "I basically copied IMM’s build." Brian ironed out the details for a successful "Magnum headed LA build" long ago...
Agreed. Its a disappointment that there is no 12:1 Icon pistons for the Magnum head combustion chamber, let alone in 3.910 bore. I have a SFT that 251/251 .570 on a 105lsa begging for a 318 and the EQ heads...
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