×

Sale ends todayGet 30% off any course (excluding packages)

Ends in --- --- ---

How to calculate engine capacity?

General Engine Building Discussion

Forum Posts

Courses

Blog

Tech Articles

Talk about engine building here. New products, tricky questions or showcase your work - If it's engine building related it's welcome here.

= Resolved threads

Author
883 Views

We have a 4g54b turbo Mitsubishi starion that we are going to tune it has .040 over wiseco pistons, how can i calculate the cc's to tune for VE

this will be my first car i tune it is my uncles as he wants this to be my test car thanks... specs below

Stock factory bore: 3.5870 = 91.1098 mm

Stroke :3.8580 = 97.9932 mm

Bored over: 0.040 =92.1258 mm new bore so how can i get the cc's?

You need to calculate the cross sectional area of the bore and then multiply it by the stroke to calculate the volume of a cylinder. Multiply this by the number of cylinders.

The stroke and bore spec I have is 98 x 91.1 mm btw.

So bore radius is 92.2/2 = 46.1 mm

Area is pi x r ^2 = 3.142 * 46.1^2 = 6677 mm^2

Volume = area x stroke = 6677 x 98 = 654301 mm^3

Engine volume = volume x # cylinders = 654,301 x 4 = 2,617,205 mm^3

So the engine capacity is 2.617 litre or 2617 cc

Thanks yea i figured i should round off the stroke for a total of 98mm thanks for the reply

We usually reply within 12hrs (often sooner)

Need Help?

Need help choosing a course?

Experiencing website difficulties?

Or need to contact us for any other reason?