OST's E and R&D

[oldeskewltoy]

from another forum Wrote:Interesting... will you make molds/castings of each head you do work on starting with this one?

The supplies, and the time involved don't make it economically feasible to just add it ... BUT I am thinking of offering this as an additional service, for a fee

(05-11-2014 10:24 PM)Bean Bandit Wrote:  Good work, I think Jeff did something similar quiet some time back.

Sent from my Nexus 4 using Tapatalk

Jeff was doing the 20V intake ports... I'm not sure, but I don't know if he ever did any exhaust bowls/ports

(05-11-2014 08:15 PM)banpei Wrote:  Nice way to compare your job with the original!

Thanks...

speaking about comparing the two....





The first thing I can tell you... the original exhaust is, without a doubt, a VERY good port. When I say I gain 3-10hp with my work... This port would lend itself to the lower side of my claim.

WHY?

The shape of the original port (bowls) shows a decent casting at both the short, and long radius's. They flow smoothly with little disruption. When I came across a head with nasty bowls, I'll cast it and post it, but for now you'll have to trust me... this original is pretty good.


So where do I gain 3, to lets say 5 hp in this head?

Part of it is in matching the valve seat to the bowl.... but the original design has a slight flaw........ It's "Y" shaped.... so the majority of where I improve the exhaust bowls and ports... even in a good casting... is where the bowls blend into the port......





I turn the "Y"... into a "V"... Less energy to navigate a straight port then one with a kink

from another forum Wrote:Any way we could see a atlantic ported head, chamber and ports.

I can ask Loynings... but I have a feeling they don't like to reveal as much as I'm willing too....