Ported V6 3.8 splitport Mustang heads!

Just got a set of split-port heads ported and ready to be sent out!

We spent most of our time on the exhaust side since the intake already flows pretty well. I focused on enlarging the opening to the top of the ports and the short side radius to straighten out the port shape. This helps keep the velocity of the air high increasing torque and horsepower.  On the intake side I gasket matched the high rpm and low rpm ports, enlarging the high rpm short ports while leaving the longer runners mostly stock, just blending them into the gasket surface (Enlarging these too much can lower your torque.) Before porting the low rpm ports they have a bit of a wall that the air hits when transitioning from the lower intake to the heads which kills the velocity which is so important. I left the intake side rougher to keep fuel atomized and polished the exhaust side to keep exhaust gasses from building up carbon. The more carbon that builds up the more flow and power is hurt. I blended where the intake ports come back together right before the valve with an eye for increasing swirl. I un-shrouded the valves conservatively to keep compression ratio up and polished up the combustion chambers for increased detonation resistance.

Pictures speak a thousand words!

The first picture shows how the exhaust ports are moved up for a straighter exhaust path while not sacrificing velocity, in process picture:

 

 Here is the straight on pre-ported exhaust port. Notice the carbon build up showing the size of the header opening and the caliper reading. That's choking power!

Now after the porting, what a difference!

Check out the view through the port before vs after:

Next check out the intake side of things, this is the short runner before:

And after: 

Same story with the long runners however we simply gasket match them to keep torque up, the long runners are where this motor develops its great torque:

This will make sure there is no wall for the air to hit as it's coming in through the intake manifold keeping velocity as high as possible. Here is a picture of all of the intake ports together:

Much better then stock!

The other side of the heads is what faces the piston. There are two issues here. First is when the casting comes too close to the valves) (shrouding.) Second is the rough casting. The roughness creates peaks which in turn create hot spots. These get hotter then the surrounding chamber actually act as little spark plugs igniting the fuel before it shoudl be. This makes the car start pinging/pre-detonation that destroys engines. This is especially important to avoid if you are advancing your timing, running nitrous, or turbo/supercharging your car. Note how smooth the chambers are and the mild porting around the valves to keep compression up while increasing flow in and out of the valves

Looking back in through the intake ports you can see how much better the short and long runners come together in an area designed to increase swirl. This increases fuel atomization and performance.

Then the ported version, notice how the smaller torque producing ports on the left have approximately the same size opening while the high rpm ports really open up into the valve area for high and low rpm swirl.

 We also get rid of the machining lip you can see here right before the valve and smooth it in

We have probably 15-20 hours  in these and I’m looking to get about 500 shipped with a refundable core charge of 199$. These have freshly lapped valves and springs installed. They are ready to be bolted on. These compare very favorably to other professionally ported heads on the internet with prices at about half what you will find elsewhere. A few years ago I put a set of these on my 2000 mustang with a camshaft and it was like a different car! Kept up with a few v8's I raced! Shoot an email to tylerc at netins.net and I will try to answer any questions you have!