Tuesday, March 26, 2013

Bore X Stroke

Tomorrow we will be measuring Bore X Stroke.

What do these measurments matter to our study of the internal combustion engine?!!

What tools do we need? What components do we need to measure?? Have you used any of these tools?

MUST READ: Read the process in these websites and bring that knowledge with you to class.


MUST READ: This Wiki has pictures to better help you understand what bore and stroke are.


The material in this site is complex, but DO take a look. There are many different factors that determine what a GREAT bore and stroke should be for a smooth, powerful engine.

This blogpost covers more in-depth measurements that are all a very important in high-performance and efficiency engine building (even for a little briggs and stratton).

This youtube video explains how a thorough inspection of a cylinder can be and how accurate tools give you more repetetive measurments.

Find the Displacement of an Internal Combustion Engine

  1. Measure the bore of the cylinders. Remove the cylinder head from the engine to expose the top of the cylinders. Choose any of the cylinders in which the piston is not up so high in the cylinder that it would interfere with the use of calipers. Use calipers to measure the internal diameter of the cylinder. This measurement is the bore of the cylinder.
  2. Establish the stroke of the pistons. With the cylinder head cover removed, hand crank the engine to get 1 of the pistons to the bottom dead center (BDC) position. Insert the shaft of a travel dial indicator into the piston to make contact with the face of the piston, while ensuring that the indicator gage display does not touch or enter the top of the cylinder.
  3. Complete the stroke measurement. Keeping the indicator gage display steady, hand crank the engine to bring the piston to the top dead center (TDC) position. Note the piston travel measured by the travel dial indicator. This measurement is the stroke of the cylinder.
  4. Determine the engine displacement. Multiply the piston stroke by the square of the cylinder bore times 0.7854 (stroke x bore x bore x 0.7854) to calculate the displacement of 1 cylinder. Multiply the displacement of 1 cylinder by the number of cylinders in the engine to get total engine displacement.

Thursday, March 21, 2013

Maker Faire

There is an event where everyone who makes things gathers. It could be origami cranes or metal airplanes.... Check it out, it will be coming to NY in September.. Might be something to consider!

Checkout the link : http://makerfaire.com/newyork-2013-call-for-makers/

Checkout what ABS has to say about it: http://blog.acceleratedbuysell.com/blog/maker-faire-fantastic-manufacturing-event-didnt/

Monday, March 18, 2013


Is what you will feel from watching this video.
and because i love watching police chases and street racers, why not have both?


and because this one looks cool *cursing at end, not intended for the weak or honda drivers*

meh watch these too, they're pretty cool

http://www.youtube.com/watch?v=bOogjY0MEHQ *audi had a head start too*

this Slowbalt SuperSlow thought it had a chance against a mazdaspeed3? what!?!

Sunday, March 17, 2013

What My Heart Consists Of...

Hey Guys Check this out
this is probably the most prettiest thing ive ever seen in this universe and is why i love cars so much till this day .....no its not a rx7 surprisingly

Wednesday, March 13, 2013

This is too cool to not pass along.. Lots of cutting and welding and grinding

This is a work of art and a product of creativity and skills. In europe they had many volkswagens putting around, more so than model-t's and 32 coupes. This guy loves what he does.

His build log is here. Click this link for inspiration:

Tuesday, March 12, 2013

Remember this guy?

I took my bike out for a ride on my birthday. Remember when started class this was the "thing in the lab"... Maybe it'll be in the lab soon for some changes.

some more interesting videos

In class we discussed valve trains. Some of the most intricate and sophisticated valve trains can be found in F1 race cars... They do not use springs... Watch this video to see how the fuel injection works on this F1.

Watch this video to have the technology explained. Here he mentions bore and stroke. We will soon cover that topic, so prepare for it.

Check out more of this person's videos. His youtube channel is called "Engineering Explained". dont forget to read comments where he is sometimes corrected.


Check these out... Do they make sense??

How about these funny videos!

Check out these videos and the way they talk about the internal combustion engine and its history. They aren't afraid to add a bit of humor and it seems they clearly get the point across.

Part 1

Part 2

Part 3

Thursday, March 7, 2013

Something to do locally

Check out the electric race cars in Jersey City. Pole Position Raceway by liberty state park is a pretty cool place.


Hybrid Drives... Electric Motors

Read this article in MotorAge about hybrid drives and how they are used in motorsports. Usually the very useful technology in motorsports gets passed down to be used in the regular passenger vehicles. Can you imagine having "pass assist" on your mom's mini-van? Instant boost via a button!