×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Ne1 pt to exhaust header & crossover design eqns or sw?

Ne1 pt to exhaust header & crossover design eqns or sw?

Ne1 pt to exhaust header & crossover design eqns or sw?

(OP)
Looking for exhaust header and system design equations or software.

Thanks,
Mike

RE: Ne1 pt to exhaust header & crossover design eqns or sw?

Try your browser---that stuff is everywhere. Every header mfgr in the world has a web site.
Try Carrol Smiths books for a laymans point of view on ex design.  Amazon.com or whatever.  Peterson Publishing/Hot Rod etc.
Pull up Racers Wholesale or Summit Racing and browse their catalogs for programs.  You do the 'legwork', ok?


Rod

RE: Ne1 pt to exhaust header & crossover design eqns or sw?

from A Graham Bell's  Four Stroke Performance Tuning

Primary length

P = ((850*ED)/rpm) - 3

rpm = speed tuned
ED 180 degrees + number of degrees exhaust opens before BDC

Primary Dia

ID = SQR(cc/((P=3)*25)) * 2.1

On a 90 degree motor firing such as V8, balance pipe Dia is 1.5 * P



Hope this helps.

drew

RE: Ne1 pt to exhaust header & crossover design eqns or sw?

Hi Gents,

I've been looking at exhaust manifold design, specifically for V6 engines.

All the formula stuff seems to be generic for engines with pulses separated by 180 degrees of the crankshaft. which is cool for 4 cylinders and v8's, but not for V6's.

Is it right to assume that the primary lengths generated by formula for the 180 engines need to be 33% longer for the V6, assuming constant gas speed. This is because the exhaust pulses are 33% closer together (120 degrees of the crank turning as opposed 180). Should I use the same formula's for the 180 degree inside diameter?

Many thanks in advance

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources