I bought a Hemi - Project Lit'lphant

[oldeskewltoy]

oldeskewltoy Wrote:A bit of discovery....





and a bit more discovery

and a bit more discovery...... I did a bit of casting.......


Exhaust....





Intake....





Both....






more to come.....

[Bean]

Intake looks really well, exhaust I guess you can improve the angle a bit.

Hope you're doing well and keep up the good work.

[Ivan141]

Am I wrong in thinking these are nice looking ports for an oem head? Exhaust short side radius looks like it could use a little work but the intake looks spot on.

[oldeskewltoy]

(10-15-2019 01:47 AM)Bean Wrote:  Intake looks really well, exhaust I guess you can improve the angle a bit.

(10-15-2019 09:15 AM)Ivan141 Wrote:  Am I wrong in thinking these are nice looking ports for an oem head? Exhaust short side radius looks like it could use a little work but the intake looks spot on.

Considering the age of the design, and the casting techniques of the day...... These heads as cast are pretty good! There is some core shift, but for the most part they are very nice as cast.

On the intake side... a small amount of work around the seats and bowls, and making the ports consistent from one to the next

this is OST-059 cylinders 4(on right) and 3





whooops, almost forgot this....




more to come.....

[oldeskewltoy]

oldeskewltoy Wrote:on the intake side...

I've not yet mentioned the exhaust side...  This has to do with a few possible options open to me.



As you can see, the exhaust side exhaust valve could be larger(original is 34mm).... the seat is even large enough to accommodate a bigger valve. 





A bigger valve is EASILY available, the Toyota 2/3TC engines use a nearly identical exhaust valve(length, stem, keeper groove) except the diameter is 36mm!






And if you look back to the castings, the exhaust port appears to be able to support a larger valve.....





So... that pretty much leads me to where I am right now...  Getting the flowbench prepared to run the hemi heads. 





The thought is to test the current valve and see if we are above/below a flow ratio of 65% of the intake flow is the exhaust flow.  Above 65%, leave it alone, run a 34mm valve, with a fresh valve job.  Below 65%, and have the valve seat machined to accept the 36mm valve.



To run the head, I need another one off tool....   a "new" valve actuator... a friend will need to weld that nut(plus another) to the metal bar





more to come........ 

[oldeskewltoy]

Well, the new valve tool is ready..... I'm only using test springs in there, so it doesn't have to be too stout.




now I just need the time to finish the set up, and calibrate the bench(new set up)



more to come....

[oldeskewltoy]

people often ask me why do I post up my work... sometimes its so others can see what I've missed.



There is something in this I missed...... Note the invoice shows 2 head gaskets... not one left, and one right????


A reader "from another forum" noticed it! Why can't I have the same gasket.... because the cooling from one head to the other would be significantly different!!!






Catching this now saves me time... money... and anger issues later.


More to come.....

[banpei]

Haha! I had to re-read that twice... Yes that makes sense and I wouldn't have thought of that!

[oldeskewltoy]

So... if you missed what was wrong with the gasket.... I made a quick and simple gif....




more to come.....

[Bean]

Could you flip it back to front and add the long hole at the other end?