Are you a real engineer? Have you read Haywood, Taylor, Sir Harry, Smith?

Add: I've talked to Jamie a few years ago back when he shared a both with Bobby Woods at the VT Expo, the guy knows his stuff. Don't know who you talked to and what was said or wrong?

 

Just my personal experience,
If a specialist (HD performance) company spends thousands of hours trying and tuning different parts and builds including exhaust designs, you can believe what they tell you. Self-proclaimed inexperienced experts without doing the actual testing, are really no more than opinions, usually someone else’s that has been “adjusted” to sound like they know what they are telling folks.
Sorry, but after over 25 years of tuning these bikes I feel if folks would listen to those who have actually done the back-to-back testing, they would make better decisions based on testing rather than opinions based on ads, forum chatter, and just plain guessing.
As always, JMHO,
Bob

 

How many v-twin engines have you built?

 

How.many Cummins QSK60 engines have you built?

If you have nothing to contribute except insults, move along. My statement stands. I'm not posting pics of my sheepskin and parents for nasty people.

 

So the answer is zero. Got it. That's all you had to say.

 

You can take what Steve Cole says,To the Bank!

 

Except when he talks about Rev Limiters..

 

What kind of engineer are you?

Would it create back pressure for low end power if the exhaust was matched? That being said i am sure better to have exaust do it. and not have one No I didn't read the last 15 pages.

 

THIS needs to be in bold text everywhere in this forum

JMHO of course

 

BSEE SDSU.. EE students still take ME clases.. Statics/Dynamics/Fluids or Thermal. Materials.

A good book on exhaust flow is Scientific Design of Intake and Exhaust Systems by Philip H Smith.. It was done in the 60s but the principal's still apply..

Adding or removing back pressure is nothing more tuning tool. One of the principles Jamie at Fuelmoto knows well. One of the reason why he picked up and started making the White Bros Exhaust.

You can shoot for the ideal were the is no restriction but most of the time builders are dealing with an exhaust made by someone else.