Wednesday, April 29, 2015

Porting for Power! Cylinder Head Porting

We lightly covered this in class. Cylinder heads are where the power is made. We need to get as much air into the cylinder as possible. Here are a few articles I browsed through that show the information in detail with plenty of photos. Please keep in mind that these a mostly forums where people use foul language, so just ignore it!


The components responsible for manipulating airflow are:

Manifolds (plenum size and transition smoothness)

Gaskets and how they match up to the ports

Runners (texture and shape)

Ports (long turn and short turn radius) texture and shape.

      - Valve guide length
      - Valve stem diameter
      - Valve seats
      - Valve face
      - Valve sealing area

Combustion Chamber shape and texture

Piston top shape and Clearance with valves

Equipment used for modifying a cylinder head:

Air-flow test bench (uses actual forced air and calibrated devices to measure air flow pressure).
Porting tool and sanding bits
Milling machine
Valve cutting/grinding machine
Valve seat cutter/grinder
Welder or epoxy to add material
Machinist blue dye to lay out your work
Plenty of measuring devices


Check out a NJ cylinder head porter called "Head Games". They seem to work on everything! Click the link and browse their website. They have many different makes and models of cars in their menu which show the work they have done.

Link to Head Games website


Harley forum posting explaining a Valve Job and it's complexities.

Link to Harley forum on Valve Jobs


Crankshaft Coalition's WIKI page on introduction to cylinder head porting.

Link to Crankshaft Coalition


In this website, Chevy Thunder, the author describes all of the components that must also be modified and how, when performing cylinder head porting. I really enjoy his graphics and his attention to the numbers.

Link to Chevy Thunder


Here is a forum thread from the H.A.M.B/Jalopy Journal on basic cylinder head porting. If you browse through this forum there will be many people building really cool hot rods and documenting them extensively.

Link to HAMB and Jalopy Journal Basic Head porting.


This article was produced by a company called Standard Abrasives explaining how their products are used for cylinder head porting. They went ahead and explained the basic porting process in great detail! It is a very informative document.

Link to Standard Abrasives porting document.


The website article here describes the use of thread to view air flow and turbulence. The thread can also find "dead spots" where the air isn't even present during its flow path towards the cylinder. You can see the tumble and the swirl produced by the port. This air is directed purposely towards areas in the combustion chamber such as squish pads and the spark plug (forces the air fuel mixture to go right to the source of pressure and ignition).

Link to DIY Porting Using Thread to check flow

There is also a bunch of information on engine performance and set up in this website DIYPorting. Check this link to the Piston to Valve Clearance. It is important to get a tight PtoVC, but not enough clearance and you will run the valve into the piston when it expands!

Link to DIY Porting PVC


This MotorGeek forum thread shows extensive modifications performed on a 5-cylinder 20-valve Audi engine. There are also pictures of it on the flow bench.

Link to MotorGeek forum thread


Here is an Audi inline-5 20-valve that has set a world land speed record. In the following links you will see the amount of work that goes into building a high-HP high-speed engine. There are MANY Pictures and detailed explanations.

Project Pad link to FRP (Four Rings Performance) LSR Audi.

Link to Quattro World article on the car and a VIDEO!


Here is an article from Engine Builder Magazine discussing at length the importance of high performance piston rings and cylinder finishes and how they work together.

Link to Engine Builder Mag article on pistons and cylinder finishes.


Last but not least.... A link from Speed Academy that explains how rotary engine porting works. This defies much of what you already understand from piston engine porting.

Monday, August 4, 2014

some torque specs to consider

If you take a look at the notes at the bottom. Some specify a 1/4 turn. This means that bolt is taken to the point where it will be stretched and expected to clamp as hard as it possibly can. These bolts are usually never re-used (replaced) when the time comes to loosen it. Don't risk stretching a bolt twice, because it will snap. Prepare in advance :)

Thursday, June 12, 2014

What a blast!!


The Kids like go karts and monster trucks... I can see why!!

Wednesday, June 4, 2014

Buy a Shirt! We are selling some T-shirts to raise some money for our 1969 VW Restoration Project!

This year for the first time in the programs history students developed an Auto Tech t-shirt to wear proudly and raise funds to support our 1969 VW beetle restoration project. This one-of-a-kind-limited-run t-shirt was designed by two students using their personal creations. It is going to be a black t-shirt so you can wear it anywhere and not be worried about people spotting the grease stains from working on your car!

Below is the PayPal button if you want to buy a shirt to support our class. They are $15.00 and if we need to ship them, it will be another $5.00. You don't need a paypal account to buy a shirt, just a form of payment.

*Shirts orders will be processed Tuesday, June 10th giving us some time to sell as many as we can. The screen printer should have them ready in a week by June 17th. Please be patient this is our first time selling shirts. 

How to buy:
1. Select your size 
2. Click the Buy Now button
3. Follow the Paypal link and enter your info.



Friday, May 30, 2014

Get familiar with ASE and how it works.

Mandatory Reads!!!

Click each link and check out what each has to show you. Come to class Monday prepared with questions. This is for our program completer's exam. I intend on testing you sometime next week, but first need to find an available proctor. We will be taking the ASE G1 Maintenance and Light Repair test.

Here is a free study guide with sample questions and answers. Challenge yourselves and don't skip ahead to the answers. Lets see how much you really know and if you can think like a machine!
Free ASE Study Guides

This is the official ASE study guide for ASE G1 Maintenance and Light Repair test. In this link you will find list of things you are expected to know and understand. There is plenty and you should know plenty of it. 7 Content Areas and 55 questions. Challenge yourselves!!
Offical ASE G1 Study Guide

ASE also put together a nice list of test taking tips. Browse through this as well. Might have some tips for you to consider on all types of tests.
ASE's Test Taking Tips!

Since this is a CBT (Computer Based Test) you will need to be familiar with the format before we actually take the test so you aren't wasting precious time figuring out the format. Take the sample test and click all of the buttons to try them out. GO ON!! TEST IT OUT!!
(Note: Make sure your pop-up's arent blocked as the test window is a POP-UP)
CBT Test Drive

Recommended Reads!

These are all of the other ASE Test Series available. There are tests to prove that you have what it takes in all areas of automotive service and repair. You might like buses, trucks, or just doing the machine work and finish work. There is a test for you to take and earn your certificate that will prove you are qualified!
ASE Certification Tests Series

This is a link to all of the other study guides available. If  you would like to see how much you know or would like to know, go ahead and browse through them. This is a recommended read if you are interested in becoming an automotive technician and taking the ASE exams!
Test Prep Training Study Guides

Wednesday, April 9, 2014

A day in the life of a newbie.

Today we (Kelvin, Mike, and me) prepped an area in the wheel well for welding. It's the place where the brake line from the reservoir connects with the brake line to the caliper. Basically it was a hole in the engine bay that was cracked from wear and possibly hard braking. Fixing it was simple, we cleaned the area with a wire-wheel and MIG( metal inert gas) -welded the crack in.

Wednesday, April 2, 2014

In case you weren't sure!

This is where you are supposed to go for 1st and 2nd period tomorrow! 3rd period head to Dr. Nina's room.

Thursday, March 13, 2014

This is our Google+ Community. If you are in the class and havent gotten in...

Click this link and request to join. From there you can make as many class-related posts you want. Here you can share pictures and ideas that will help us in our projects. Don't forget that you can include anything you think we'd like to see!!

Digital Profiles: YOU MUST HAVE ONE!!!

These days everyone and everything and their mothers are being "Googled".. What happens when nothing comes up?? Does this mean you don't exist? Certaintly NOT! The issue is that you may have great achievements and accomplishments, but the world knows nothing of them.


A portfolio, awards, credentials, final products... How many of those can you carry around with you to show when needed? What if you applied for a job, and before they considered your application, they "googled" you and when the results came in there was nothing about you.. NEXTTTT!! PICTURES OR IT DIDN'T HAPPEN..

Check out this MHS student's blog. He's posting his explorations and findings. He's already developed a great digital profile.

This is Mr. Grosinger's Class' blog. He posts things here that him and his students do in class. He teaches a few classes in WNY's Memorial HS.

This is where the rubber meets the road! Google+ will allow us to easily keep each other up to speed on any of our progress and share photos of our work. Below you will find Mr. Grosinger's MHS Shop Class's Google+ Community. Here students are welcomed to share anything class related that they add to their blogs.