59 Calculating Your Compression Ratio

[MrBigred29]

I sure hope there is no pop quiz!

[MongooseFreeRider]

You did this without a calculator..I'm impressed!!

[fernandobako]

Thanks sir

[jkk20]

very informative video .... @universitymotoesltd : what is your take volumetric efficiency ????

[jcadlols]

If you want to get a very accurate reading of a surface area (such as the tracing of the gasket), weigh with an accurate set of scales a known area of paper, say 10 square inches, then weigh the traced paper. From this you can easily figure out the area, however only with a good set of scales. :)

[3162826]

great video. why not use r²xPi for the gasket surface? isn't it a perfect circle?and wouldn't a used gasket be more acurate for calculating the gasketvolume, since this already has the 'crush' taken out of it?

very informative, and i like your low-tech approach, just clever measuring and good old-fashioned math! nothing digital

[zacferrer]

hey amigo...this guy is great...he is very helpful to us technically speaking and very informative....

[vachief]

Nice job with the explaination....it would be interesting to know how far you can increase the compresion ratio in relation to the fuel octane rating

[maddatta]

I believe the higher your compression ratio, the more you will squeeze the air and fuel mixture, in turn creating more heat and increasing the possibilty of auto ignition. If you use higher octane fuel, it requires a higher temperature to ignite, so you can compress it further. Correct me if I'm wrong please.

[vachief]

..Increasing the CR also add a noticeable increase in power..yes premium gas is required the higher you go. Auto-ignition or run-on is'nt really an issue with Weber carburators...I'm removeing the SU's on my '73, flowing the head, 270 cam, Weber 38mm, roller rockers. I'm following Peter Burgess in an engine design plan. Should be able to obtain 100hp at the wheels. It's fun..but it ain't cheap.

[jcadlols]

@maddatta you are absolutely correct

[MarsMyGirl]

OMG! Way over my head!!! John, you're the MAN!

[misterpat1975]

This is a great video. That man is an incredibly smart man. Two thumbs up!

[reggo3636]

Do you use water to fill them? or gas?

[gstraitman]

great job