intake design

[usain]

hey ,
i am from peru. We are in the phase of designing a new car . I would like to know how do you calculate the pressure drop at the inlet ports . data i possess is the cam uplift at different angles. Awaiting help..
usain

[Hector]

Very carefully.

[Jon Burford]

I'm sure the answer will be here
https://www.google.com/webhp?r...n=1&biw=1440&bih=839 (https://www.google.com/webhp?rlz=1C1CHFX_en-gbGB493GB493&sourceid=chrome-instant&ie=UTF-8&ion=1#hl=en&safe=off&rlz=1C1CHFX_en-gbGB493GB493&sa=X&ei=7cFaUPyONoLB0QXa0YDYAQ&ved=0CBkQvwUoAQ&q=how+to+calculate+pressure+drop+at+inlet+port&spell=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&fp=9e8bc36898b2283e&ion=1&biw=1440&bih=839)

[Zac]

Originally posted by usain:
Could you please provide me a more precise or compact answer.
REG,
Usain

yes.

[PatClarke]

Usain,

this is far too complex a question to expect a short answer. Pleading will not help.

You wiill not get a long answer because you have not given enough information.

Even if you did give all the necessary information, it is unrealistic to expect someone to spend weeks of their time running simulations for you.

Sorry Usain, but you are going to have to work this all out on your own!

Part of the wonderful challenge of FSAE!

Pat

[Jon Burford]

Usain,
Pat is correct. It's a long topic to discuss. I worked it our from the google search when I was doing FSAE and I am not even an engineer.
You can do it, I have faith.
It will take some time I'm sure, but it will be rewarding.

[Drew Price]

Hey Usain,

If you haven't seen them already, the stickied links at the top of the Open Discussion forum will be really helpful, especially the 2nd two links:


If you are new here, click here and read this first... (http://fsae.com/eve/forums/a/tpc/f/125607348/m/72110779141)


Design links sources list (http://fsae.com/eve/forums/a/tpc/f/125607348/m/98210551621)


BOOK LIST to reference for car design (http://fsae.com/eve/forums/a/tpc/f/125607348/m/1956095883)



Good luck!

[Warpspeed]

Usain,
You might care to take a look at the capabilities of "Pipemax" software.
Sensibly priced for the student or amateur, it is an excellent well proven tool for designing optimum induction and exhaust systems for any application.

[Mbirt]

Usain,

With WAVE and Blair's "Design and Simulation of Four-Stroke Engines", your resources are already richer than many (maybe most). I wouldn't bother spending more money trying to understand theory at this point. If you're running a single or 600cc 4-cylinder, Blair has analyzed both either in the book or in SAE papers (YZ400 and an older Yamaha 600 I believe).

I would do the following:
-Read this "Back to Basics" article by Blair (http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CCIQFjAA&url=http%3A%2F%2Fwww.profblairandassociates.com%2F pdfs%2FBack_to_basics.pdf&ei=gFtfUJfKNKSYygHH-YHQDA&usg=AFQjCNFb1g5XaHY87swQZtZ2VDd-3KaGig)
-Make sure you have free access to SAE papers through your school and then obtain papers about FSAE and race engine intake design. Compare them to see the various theories which don't always agree with each other.
-Skip to chapter 6 about empiricism in Blair's black book. That will simplify things a good bit and make the rest of the book easier to understand.
-Open up WAVE and start playing around with tutorial models. The help files are great. Start modifying parameters to match your engine. You'll be well on your way to a model that correlates well enough for intake and exhaust design decisions.

[Warpspeed]

There is plenty of info out there if you search, but some of it can be rather abstract and difficult to digest, or beyond the budget of most of us.

Raw "book" theory is one thing, but good proven simulation software will allow you to very easily change parameters individually, and see what effect each has.

If entering baseline data for the original engine reproduces reasonably accurately the stock factory torque curve, that is a wonderful foundation to start from.

To do this effectively, I think you really need three things. A real engine and dyno to play with, some basic theory as from Blair, and a good software simulation package to also play around with.
All three compliment each other. If you only have one, or two of the above, it all becomes much more difficult.