I'm not so certain yet...one x seems to slam the two banks into each other and then forces the flow around a cheater bend, the other is a nice constant radius that smoothly blends the two streams in a much more gentle 180 degree bend. Has anyone measured backpressure on a crossover >< vs the two u's butted together type )( ? I'm curious as to why the crossover type is considered/used post-turbine where there should be little to no scavenging.

Enrique, didn't you run some CFD on both types?

 

Earl,

Yea we did on Comsol and Solidworks. I don't want to step on anyone's toes so i'll leave those details out...

For those that don't know comsol.

http://www.comsol.com/

 

Enrique what type of hanger did use for mounting to eliminate rattling? Have you cut any tips on a angle yet or should I be the first?

 

You have a well taken point,with that I might not be totally certain either now..
But is that really going to make a big difference because it is still having to banks of gases slamming into each other to a certain extent ?.
One way to check would be on a flow bench and trying to simulate those flows coming together or a back to back dyno test with the SAME conditions as each run..

 

Yes, with a straight X-Pipe and no mufflers, the sound will always be similar - loud with drone, for those that want that very aggressive sound.

It's when you begin to design a muffled system and shoot for a great overall package that the majority of owners would enjoy using on a daily basis that the R&D comes into play. Then there are vast differences between systems. This is where we have concentrated our efforts. We don't want the drone complaints that plague most other systems, when the customer is promised none or very little drone...that takes some R&D, unless you get extremely lucky.

 

I believe you do put more research and testing into the way the systems are going to sound then most of the similar systems out there..
I also believe/think its easy to build/copy a non-muffler/cat X system ..As they are popping up..Could these types be so much different?? IMO not that much but I dont know everything or have not seen or heard any test results on this.........

 

Thank you for the comment on our tips! Sound wise these are not a direct comparison though. Our link above is of our 3.0" Catless internally muffled X-pipe vs a non-muffled catless X-pipe set up. That is the reason for the sound/tone difference. Pictures are below on what was used in our video.




Internal View:


OP, enjoy the new system!

 

Got it. Yup just clarifying out X pipe merge is different. It is not a copy.

I love these tips





But I take pride on my work and decided not to copy that. I have something else that I want to do for tips. Just like my exhaust, i take pride and i do not copy. Never cheated/copied in getting my B.S / B.A and I'm not going to start now. This exhaust was all simulated on computer before anything physically was started. Acoustics sound was my goal.

Goto www.Comsol.com and look up acoustics as a subprogram they have. : )


http://www.comsol.com/products/speci...ons/acoustics/

 

A question I have since you seem to be knowledgeable on the topic, your highest performance exhaust, will it give better power figures than a 3' muffler delete, cat delete, x pipe, like the one I have say?

 

Oh no hesitation here! I ordered mine, just waiting for it to come in the mail

 

This might not sound good to the members buying specific X pipes BUT IMO going to any vendors pipe thats catless/3'' is going to kick *** over the stock exhaust even if it was modified OR most 200 cell aftermarket systems...I am only talking performance gains here NOT sound choices...
I think that this is an honest statement...Just my thoughts here..

 

From my first hand experience I completely agree, not only the sounds is incredible but performance was definitely improved, this was tested against a race I had with a friends cls55 before and after the exhaust was installed.

 

The sound when you first hear it from a cold start up after it has been installed....priceless. The sound when you hit 7krpm for the first time..criminal!

Enjoy

 

Maybe your exhaust maker will make ones with a few straight thru mufflers to make it a bit quieter for others that are interested??

 

Our highest performance system would be a catless 2.5 or 3.0 (both come with 3" cat bypass pipes) with the optional muffler bypass pipes. It is a short, straight path out the back and has less resistance than when connected to an "X". It is also lighter. So if you are running race fuel or/or tracking/racing your car (1/4 mile, road course or race), it will provide the best performance when counting hundreths of seconds or in a head to head battle. Next, would be our X-Pipe with no mufflers, no cats - same as what you had built. A little heavier and a little more resistance, but very high performance and better sound that the short straight pipes. Our top selling X-flow systems (the muffled 2.5 & 3.0) are designed to be able to go back and forth from the lightest high performance configuration for a track event to a comfortable daily driver in between events. But we do offer the "X-PIPE" (non-muffled) for those that want it loud every day and desire the sound attributes of a cross-flow system. They sound better than the short straight pipes. IMO, the short straight pipes are good for getting numbers only, they do not sound very nice, but they are light, offer total flow and get the job done...