Cylinder Head 204 - Porting & Polishing
This is a first-generation 1992 1.6L Hyundai Elantra
small-combustion-chamber head. Thats what it is. It's a J1 engine's
In Cylinder Head 106 I talked about the mainstream porting theories as they
are discussed. We looked at a cylinder head that I have thousands of
dollars of professional work performed on, and a bone-stock
second-generation head that I didn't port.
In this video I just might do something you haven't seen done before. For
some, that may be uncomfortable. The port and polish job I perform here is
what I think will work best for my current build. This is not an extreme
killer port job. What will be different here is where port textures are
concerned, I will be following the advice of a reputable source that will
remain un-named. You're free to port yours differently than I do in this
video, and I give you that out, around the 20 minute marker.
The Hyundai is far from being an ultimate-performance build. It's a $400
box of scraps with nothing but time invested. It's perfect for this video.
My finished product WILL be an improvement over what I had. I don't yet
have access to a flow bench. I still have an achievement to un-lock. As
far as you should be concerned with the techniques I employ... without flow
numbers there is no evidence of what this will do, but we will gather lots
of info from dynp sessions and drag strip time slips. If I could test it on
a flow bench, I would.
There are MANY, and when I say many, I mean thousands of flame war
mongering pirates floating around on rough seas with a hair trigger cannon
finger itching to fire if you port a head any differently than what the
herd mentality says to do while porting a cylinder head. I cover the herd
mentality because it has merit. It's been tested. Tried and true. But I
don't follow it to the letter of the law. I'm definitely not here to
de-bunk it. I would port a cylinder head differently for each build based
on how that engine was used. There's an extremely valid reason why
relating to air speed. It's not the texture of a port that maximizes the
effect of fuel atomization, but the velocity of the air running through an
x or y sized valve. The driving factor in this is the piston speed. I'm
not going to give you the technical information, but will refer you to
information about the Lovell factor. There's a better description of this
in the links below, and even a calculator to help you find your engine's
Why the Lovell factor is important:
Lovell gas factor calculator:
Only people who have flow testing equipment know for sure what really works
and have the capability to produce a perfectly-matched port job for the
ultimate performance build. Those guys know the definition of ultimate,
and THEY are floating below the water Aegis-class submarines ready to blow
your comment up if you don't know what you're talking about. They don't
care if you're an armchair mechanic or a herd of pirates. I will say,
they're zoomed in pretty close on me right now, and I'm expecting to take a
few hits. My work will be tested based on Dyno and drag strip performance,
and the results will be posted here. Fortunately, those kinds of videos
are a WHOLE LOT EASIER TO MAKE!!!
Volvo Engine head porting/ matching exhaust
Gasket matching my Exhaust port on the
Nothing spectacular and quite boring to watch but quite tricky to do.
The point on this "process" is to align correctly the Exhaust port with the Exhaust manifold to allow gas to flow without
it can exit faster and let more
fresh air come inside the cylinder.
In the same time the shape of this port is important :
the very light conical shape is a good and reliable design for Exhaust.
the point is to grind very far to have a tight curve and not only grind to
4G93 with 304 Degree Cams and Gas Flowed Head
Running for the first time after rebuild.
Head is flowing about 140CFM Bare Port. The cams are one off regrinds by
Kent cams, both about 304 degrees and about 9.7mm full lift. Peak Power
somewhere between 180 and 190 BHP @ Fly
Standard compression ratio.
Needs a visit to RR to get best out of cams and get the fuel pressure right
Port and polish jobs
Summary of the quality work and different applications of Porting and
Polishing to just a few Heads and Intakes that I have done for either
imported or domestic cars.
Fitting new valve guide seals without removing the cylinder head Suzuki Vitara
This is how you can remove and replace valve guide seals with the head
still on the engine. Normally you have to have the head off so you can fit
the valve spring compressor on to the head of the valve. I had heard of
this method but never tried or seen it done before. The only special tool
is a piece of string.
Watch the video and see the "Essex Red Neck" at work :-)
F22b1 port and polish #3
A lil clip of some more work that i put into it. still gots some work to be
done as you can see. will be milling all 3 sides once done. left the 4th
Combustion chamber/intake port/Exhaust
port alone to compare my cfm's with stock..
Port and Polish F22b1 accord head #2
just a couple of vids of me workin on my port and polish. all work is
performed on a f22b1 head. Going to be using new stainless steel swirl
polished valves and later springs and titanium retainers! let me know what
you think! this is my first job!
**EDIT: no its not my first job, but its my first personal job for my car
at the time. next video i will be working on a Iron head for my svo.
diffrent ways for the iron and diffrent bits.
please people leave COMMENTS!!!!
porting tools & carbide burrs 1
porting, polishing and buffing, after this video we've re-seated it using a
SERDI 100 Valve Seat Cutting Machine then resurfaced the head in a COMEC
RP900 Surface Grinder