V4 Exhaust layout...

" An asymmetrical (front vs. rear) exhaust length also tunes both feel and sound for a combination of V4 torque and inline power delivery."

 

Tink, it would also seem Honda is using this same set up on the new Cross runner.
hard to tell from the pics I have seen, but it is interesting to see a dyno sheet to see how this shifted the power from the 6th gen VFR.
after all minus the body work the cross runner is the same.
This could be a future source for a header that will give more bottom end.

 

I don't think it will be a huge gain tink, but between the headers ( loosing some top end I'm sure ) and messing w/ the VTEC you will see a bit more down low and in the mid range.

 

I had my pipes done in Bavaria by Baldes, they work really good!

 

did you pair the front together and then the rear together??

 

Yes, and it works perfect

 

equal lenth on the pairs or is the front longer??
was this something that was designed on a dyno?
I'm looking to do something sim w/ my 6th gen.
front pair low moto gp style and the rear under the seat.

 

This is a 4-2 system correct? I am not overly familiar with your engine's design - is this a 90d V4 with a 180 degree crank? What is your cylinder firing order?

In working on your design was the goal to have the 1|3 and 2|4 pipes the same length?

On a side note, kudos to Baldes on their excellent pipe bending and welding skills!

Thx!

 

The pipes has the same lenght, the belly can is shorther, I call it 2-one down and 2 - one up, same as the RCV212V

 

Baldes is personal friend of mine, He has been working on exhaust systems more 30 years.

 

Thanks for the post.

Very nice work indeed. If I could ask, do you know if Baldes has ever designed & fabricated a system for the VF500F?

 

He hasn't done it yet, but he likes Challenges !

 

Any chance someone local owns a VF500F that could be referenced for making the pattern?

On a side note, does Baldes have a website that shows photos of his work? He is pretty handy with a pipe bender.

Thx!

 

Adress: Edelstahlauspuff - Titanauspuff - Rahmenbau - Motorrad - Leistungsmessung it is in german, some nice pictures

 

This is impressive work!





If you do have a chance to speak with him regarding an exhaust system for a VF500F please let me know.

Many thanks.

 

Write him an e-mail, he knows english, if you keep it straight. He's one hell of guy, Hunter of wildboars, love his dogs, and his titanium and steel if you have no luck with e-mail I'll contact him for you!

 

5x5, thanks.

 

I have been working on exhaust systems for more than 40 years.
I started by working in a Honda dealership when I was 16 and now I am 61.

I have built a 2 in 1 x 2 system equal length and now I have a 4 into 4 equal length. For the VF1000R

The 4 into 4 equal length has far more power.
I rode it today for the first time and now I do not need to shift into high gear as soon as I used to.

The stock system is basically a 2 into 1 into 2 system. It is not a catalytic converter but just a box filled with perforations to limit the noise. I have take the box apart and examined it. No platinum sulfide -no glass ceramic lining.

You do not need a physics degree to design an exhaust system.
A dyno will help a lot though. But before you make a new exhaust make sure to get a dyno on the stock pipes you have so you can make comparisons.
Seat of the pants and stop watch will tell you a lot also.
4 into 4 BELOW: All 30" inches long.

 

Anyone know what models had those Honda 90 degree V4s ??????????????

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Wit so many variables, ambibuous theories, much well educated amateur speculation obvioiusly some amateur scientists here. Where are our best mathematicians, phisisits, and gas dynamiks perfessors ??? We gotta have one or two at VFRW. Na, those guys' wives won't let hubby ride.Those guys could work it all out on computers, just like those guys with thick glasses and impervious pocket protectors like they did back at the Honda factory. And maybe someday Honda will reveal their ingineers developments data including theory, and none of that should still be top secret info now, until then......maybe Assange can get us the documents. Interestin reading fosho.

For true inspiration find some photos of the hand crafted HRC factory racing exhausts used in various world racing series during the VF, VFR and RC 30 hayday. All were on the left side mostly.

Also find photos of the 'zorst pipes in Honda's NR 750 work-of-art, museum quality, every inch hand crafted exhaust system ever fitted to any motorcycle on this planet, and that would be.....NR 750. I feel sure of it ! In any case, the NR 750 pipes are hand crafted inch by inch by master metalworkers, fitting their multitude of small sections together with the perfection of a jewler. Go ahead, Google it, you'll see.


IF any man has not walked around his bike after a ride, hada coupla beers and not started dreaming up new exhaust systems, he would be a very dull man indeed, and i damn well wouldn't want to drink with him.!

It's how Henry Ford ( who may not actually have been all that anti-semitic) and all the tinkerers in their mum's back garden shed invented shock absorbers, automatic mufflers and ball joints.


I have no need or wish to make any bike i own any faster..... just slight changes to optimise things. Since inefficiency is a seroius crime to some and they must stamp it out. VTR 250s are the only bikes i have that are too slow, and everything over a good 600 is actually just about too fast anywhere to be legal, safe, or advisable, but nobody's gunna say that.