Project looks good. Your english is good too

Warm welcome to Migweb :beer:

 

Nice work, and nice English!

 

Tidy work!

I wish I had a lathe

 

Cutting off the base for the manifold.

Base is made out 30mm billet. Using the gasket to mark of the dimensions.

 

Look forward to seeing more of the excellent work.

 

this should be good!

 

workman ship looks good, keep the updates coming

 

workmanship looks great, i take it ally isnt worth that much where your from lmao

 

Used super glue to put the cut off (original manifold) onto the base plate:

We need to do that to pre drill out the mounting holes.

Pre drilling the mounting holes:

Pre drilled and lined up to check for fittment:

Drilled an fitted with stainless mounting bolts:

 

nice bit of engineering there lads

 

Here we go! Starting to cnc machine the inlet ports and the manifold.


Mounting the head onto the cnc machine:

First step in drilling the inlet ports:

Measuring shape and size of the inlet ports.

Machining the inlet. (preshaping the head without the manifold)

Inlet Port (cnc machined and with an optimized angle for the gas flow / inlet valve).
The port is not finished (The steps will be smoothed out by hand with porting tools).

 

Shaping the inlet ports:

Base plate is mounted onto the cylinder head.

First step is to countersink the mounting holes for the inlet runners.

Inlet runner(will be welded to the base plate)

Starting up

Countersinking (inlet runners)

Final shaping of the port (manifold and head).
This is done to achieve a perfect blending of head port and inlet manifold port.

 

Base plate and head together

 

Nice work! So port size will be 37mm measured from the head ? looks a lot more from those pics. I used 39mm port size with custom intake on one c20ne engine and oh boy does it like to rev

 

This is how the port looks with the manifold attached to the head

Test fitting the inlet runners.

Let me know what ya think so far!!

 

that is something...

I notice your opening up the ports, this might hinder low end gas flow, nonetheless top job.

keep us posted dude

 

We didnt notice much loss of low end power on my m8`s c20ne engine , and we ported it to 39mm measured on head, runners on manifold are 45mm and tappered to 39mm on the head.

That looks the tits , and now i understand why it looked so big on the pic. keep up the good work

 

was it benchmarked with standard size ports?

well port size varies on powerband, cams, and fueling setup so if you guys want a screamer then I guess 39mm is pretty small, dont know if you guys know but im sure c14se n c16se heads have 37mm ports.

I wish I had the time and equipments to do the above, I have so many plans but no time or money

 

The ports are not finished yet. They will receive a extreme port job.
Oversize inlet and exhaust valves (polished).
3 Angle valve job. (with blending the valves to the seat).
Bronze valve guides etc...
Reshaping the comb. chamber (for better cylinder filling).

Even the stock ports are large. But we will have huge ones!
We are also reshaping the inlet port (welding ally onto the port and onto the plenum and blending it with the porting tools.


We will also run a high lift cam (296 degrees).
c20xe parts (pistons, con rods, crank)


Here is a inlet port
Stage 1:

Stage 2:

Ports are not finished at all.
Ported more than 5 hours today just blending it with the manifold and started to give the inlet port a rough shape.

 

Manifold:

More pics will follow...

 

more pics:

Looking through manifold into inlet runner (bottom to top):

 

your very handy with a cnc machine and billit alloy, one question....whats the value of alu in your country? lmaolmao

 

The ally is from previous cnc work. We just looked in different corners at the shop an my friend Gunter found the goodies.

We will prep the inlet runners for water/methanol injection jets next week.
The base plate will also be cut down and machined. We hope to get it welded soon.
The porting and blending takes so much time!

Tools that i used for porting:

 

Exhaust port stage 1:

 

More porting done this week.
Exhaust port stage III.

Inlet port stage III.
before shaving the area around the valve guide.

after shaving

All ports have been streamlined. The inlet have a really sharp edge and the exhaust ports are milder for better heat dissipation.

Will work on custom valve guides monday.

 

Worked on the inlet valves.

polishing top and bottom:

Valves where sanded and polished with several grits.
(starting with 320 and right now the are polished with 800 grid).
They will receive a second polishing process with 1000, 1200, 1600, 2000, 2500 and i will finally use polishing wax to a mirror finish.


800 grid finish:

custom inlet versus stock inlet (left oversized/right stock):

Check out the shaft's do you see the difference? (will flow better than stock)

Of course they are bigger than stock:

If anybody is interested in custom c20ne 2.0L 8v OHC inlet valves drop me a line. I have a couple sets for sale. They are far from beeing expensive!!!!