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Engine Specific Info and Questions => IDI Engine => Topic started by: zaprzal on August 04, 2008, 10:28:07 am

Title: Volumetric efficiency of 1.6td?
Post by: zaprzal on August 04, 2008, 10:28:07 am

What is Volumetric efficiency of stock 1.6td, 1.6td with ported head, 1.6td with 1.9 head?

Title: Volumetric efficiency of 1.6td?
Post by: dillenger1 on August 04, 2008, 11:00:02 am

I thought that had to do with turbos?Ive never heard an engine rated in those terms.It may just be me though,im still a newb. :)

Title: Volumetric efficiency of 1.6td?
Post by: gigaz2 on August 04, 2008, 12:10:23 pm

VE has to do with flow, cam and basically all the other physical dimensions of the engine.

if you change headers, VE changes.

I don't remember if the SAE paper adresses that, but its a good read nonetheless

Title: Volumetric efficiency of 1.6td?
Post by: zaprzal on August 05, 2008, 04:29:51 am

do you know how much is it for 1.6td with stock cam? It isn't constant, it change a bit in differen rpm range? right?

Title: Volumetric efficiency of 1.6td?
Post by: gigaz2 on August 05, 2008, 06:23:59 am

its a curve, follows the torque curve, but not quite.

I couldn't found any plots online, and don't recall seeing one for a 1.6, I'm pretty sure that if there is one, its on the SAE papers.

you can also calculate it from the torque VS BSFC curve I believe.

wiki:
http://en.wikipedia.org/wiki/Volumetric_efficiency

better:
http://tunertools.com/articles/volumetric-efficiency.asp