Ideal Exhaust Size for Displacement and Power

Size does matter, after all.

Over the years I've compiled data from various sources and personal tests to put together a chart of ideal exhaust pipe diameters. These diameters are of course only a starting point, but in my experience they have been pretty "bang on".

These diameters are specifically for "cat back" exhaust systems and are generally the best compromise between velocity and overall flow. John Grudynski, in an class I did with him for TU Premium members back a few months ago (Available Here: The Secrets of Header & Exhaust Design) talked about how he frequently achieves better results with relatively "small" exhaust systems and how he will occasionally use a "step system" on really radical street and race cars. The chart (a TU Premium exclusive) covers everything from 1.5L to 4.5L or so, both dual and single exhaust diameters, and various power outputs. Use this as a guide, then always test for absolute optimum results.

More information about how to use this chart, inside.

Access to this article is just ONE of many benefits of TU Premium Membership and you can try TU Premium for a full month, for just $1.

Each month TU Premium members enjoy exclusive content not available to the general public. They receive exclusive articles, live classes, access to archived classes and one very special guest talk each month. Every month I get on the phone with a leading expert in engine building or some other area of performance and they teach TU Premium members how to get the most out of their builds.

Nazeer Moola, TU Premium Member from South Africa

TU Premium Member Testimonial

Being involved in the auto industry I have learned that it is one thing repairing vehicles and another ballgame modifying them.
There are tons of documentation available in order to learn how to modify cars but none of them gives you the low down like Tuner University does. There's always tests done which includes scientific evidence. Therefore it doesn't get any better than this.
I am glad that I had the opportunity to join Tuner University.
There is a lot of cash that can be saved on mods that do not improve performance,handling etc by following the technical articles from Tuner University.
Thanks to Tuner University I have found that a few mods which were done on my vehicle that did not make any sense. I have since reverted from these mods and couldn't be happier because
the difference is as clear as day and night and I now also have full understanding of exactly what is occurring. Now It seems that I do not have enough doccumentation from T.U and
can't wait for new articles. Good Job Nathan and thank you very much! -- Nazeer Moola, South Africa (TU Premium Member )

Get access to this article, classes like "Performance on a Sip of Fuel" ($29 value), as well as this month's guest speaker all for a $1 trial, then after you've experienced the benefits of membership for yourself you won't have to do a thing and your monthly membership of just $19.95 will continue automatically. If you're not absolutely thrilled, we'll refund every penny of your money and cancel your membership.

Click the Paypal Button to Get Access!

Already a TU Premium member? Login to access this article

Extremely Limited Time Offer - 3 Days Only

Get a MASTERS DEGREE in Performance Tuning from the BEST in the Field for ONE low package price

For 3 days only, get ALL of our PREMIUM (not available anywhere else) Tuner University Courses featuring some of the greatest minds in motorsports:

- Top 10 Performance Myths Class (MP3 and Edited Transcript) - $29.95 value
- Performance on a Sip of Fuel Class (MP3 and class manual) - $69.95 value
- Header Design Secrets with John Grudynski (MP3 and transcript) - $69.95 value
- Dirty Secrets of Oil with Ryan Stark (MP3 and transcript) - $69.95 value
- Engine Tuning Secrets with Ben Strader of EFI University (MP3 and Transcript) - $69.95 value

Get all of the above courses (many of which not currently available anywhere else) for one single price of just $309.75 $69.95. A HUGE package savings.

You can also buy any of these individually through our resource center, but I don't know why you would as this is basically the whole store for the price of just 1 course. You'll get the MP3 recordings of each class as well as a transcript or companion manual with each course and you'll be able to download them all INSTANTLY.

Claim Yours Now

Click the button above to get yours! ($69.95, instant download)

This entry was posted in TU Premium. Bookmark the permalink.