Project Low Boost - Damn CA

Good Morning Guys....

Long time no update... .
As you know the car blew it head gasket again .
So now I'm going to build in some reliability..

You will not believe how unmatched the intake is to the head on the Ca18det.

Now its dremel time ....

I also got the Spares needed to do the rebuild...

Head Gasket compare... Stock Vs Cometic

I also got the head back, Fully redone new stem seals and seats...
Full Port and polish, CC'ed and Combustion chambers done.

Combustion Chambers

Exhaust Port...

Intake port

Ported Intake manifold on new head

And finally a nice set of cut cams

VERY VERY nice stuff there.

eish!!! 😮 😮 😮

its gonna be cool maneer!!! even more powa!!!

Fu**er!!!!!!

Nice work there Phinx

Ya nice....fu**er 😉

I just need to finish the port matching...
I cant believe Nissan even shipped the motor with ports so mismatched.

The Lower intake will get a full polish and the stock intake will be fitted untill something arrives 😉

hmmm...

where's my dremel tool i wonder!!!???

maybe you got a friday motor???

Looking good Phinx, looking forward to your results 😀

I am about to become unpopular but I feel the need to correct a terrible mistake I see being perpetuated.

Where the port is "matched" to the gasket is an abortion. You cannot "round' the port out to the gasket line as it creates terrible turbulence and destroys the flow.

The port must taper in gradually and evenly from the gasket over as long a distance as possible for the best results.

Any head porter who does ports like that should have his nuts removed withy a pair of rusty pliers.

You need to "think" like air it has inertia and mass it doesnt like sudden changes in direction and wont flow anywhere near your gasket line howver the sudden divergence and convergence will cause massive turbulence and screw up all your hard work.

YMMV

Advice noted...

Its a very smooth transition from the intake to the head ports.
I removed allot of material like you said to smooth it out .

The pic's below are still the dry runs.

But let me run with it for now as the intake has been assembled

Thanks for the input

The Calibrator wrote:

I am about to become unpopular but...

The Calibrator wrote:

Any head porter who does ports like that...

a wallaby for a month and already bashing the green and gold jerseys
🙄

This low boost high power stories? Are we going backwards to normally aspirated? 0.5 bar? No need for turbo then? 😂 😂 😀

I wanted to go with a high compression low boost setup, but was advised against it... But yeah my only reason was I could get a custom set of 84mm 9.5:1 Wiseco's with Total seal rings and High Heat coating for $400 - bargain and a half

these two illustrate what I am talking about look at the entrance to the port. See how sharply it diverges to the gasket line.

Another Nono eating into the squishband

So you dont think the flow job was up to scratch?

Anyway got the info on the Cams.

In : 248 Degree 9.5 mm lift
Ex : 248 Degree 9.5 mm lift

Also All lifers have been reconed.... 😂

good for the lifters.

stoopid lifters!!!

STD is 8.5mm and I read somewhere that the max lift with hydraulic lifters is 8.5mm?!

Stock on the Ca18det inlet is 7,5mm .

8,5 mm is right for the limit, But they are special lifters 😂