Hey Timbo,
I'm guessing you kept the stock exhaust cans, yes?
How different does the exhaust sound now that you have the sport cats. Any way we can hear your cars exhaust sound, maybe a video sound clip please.

I am interested in making my car louder if it's feasible.

 

Louder is achievable with several different options. To my ear, though, none of them sound better than (or even as good as) the OEM set-up.

 

I personally don't like the aftermarket exhaust sounds. I think the original exhaust sound's best. I just want the OEM exhaust sound to be louder, if possible.

 

Its def louder especially on cold start up lol
I did a track day last year and was told by some of the guys on it when they were in the pits and couldnt see my car out on track that it sounded like a race car.
Not sure if thats a good or bad thing lol

 

Any chance of a sound clip.

 

Pretty sold on these 200 cell cats already. A couple of questions im hoping Stuart can help with:

I would love to ultimately keep the stock x pipe and muffler and just have higher performance and an amplified stock exhaust sound (as others have also wished for) from these high flow cats. Adding these cats will improve the performance and increase the sound, but does anyone know at what point the stock muffler becomes a bottle neck on the whole system (with valves opened of course)?

i haven't seen the internal workings of the stock R muffler, but what kind of big horsepower numbers have these v8 f-types achieved with all the typical upgrades but keeping the stock mufflers?

thanks.
jon

 

The stock muffler hasn't proven to be a bottleneck at all. Bear in mind the SVR is pushing 570ish, and we are running 650 with crank pulley & tune, all through stock exhaust systems.

At some point it might start to show some statistically significant restriction but I think you'd need upper and lower pulley and tune and possibly a 100 shot or a larger blower to start seeing that.

As exhaust gases travel further and further from the engine, they cool rapidly. A lot of heat is dissipated through the exhaust system and into the environment. With cooling comes a corresponding decrease in pressure.

Remember Bernoulli's law states that as fluid moves from higher pressure to lower pressure areas, the speed will increase. So as the gases dissipate heat along the length of the exhaust system they decrease pressure/volume and accelerate.

So by the time the rear muffler area is reached, pressure restriction is far less influential than it is for example in the header collector.

 

thanks so much for the well thought out reply, Stuart! When you get a chance can you pls PM me the best deal you currently can do for me on a set of these cats? 200 cell for my 2015 R (RWD). Shipped to 94538 CA.

thank you sir!
jon

 

Anyone else that can provide input on a V6S? I want to keep the quality/refinement of the OEM sound but louder. I don't want any raspiness.

 

I have a set of ceramic coated, RESONATED, 200 cell downpipes being made by Velocity to hopefully achieve a louder yet non raspy sound. RESONATED = 12", free flowing resonator added to each pipe after the cat.
This is for my SVR. I have the 200 cell pipes now, but I want it to be a little less raspy, especially when cold.

 

To anyone who has replaced their downpipe (without taking it to someone else to install).
What's the best way to reach/tighten the bolt on the backside of the downpipe flange?

Mike L
2017 SVR

 

 

 

I'll know in 1-2 weeks!

 

 

Yes, but these will be "resonated" 200 cell downpipes ….

 

That may make the necessary difference. Also the headers probably contributed to the raspiness as well.

 

Anyone with the 200 cells on a v8 can let me know if this introduces drone in the cabin with the valves closed? Also does it take away from the sound with the valves open? Thanks.

 

1. Drone in the cabin with the valves closed -= No, just a little louder
2. Valves open adds volume and a bit of edge/rasp

 

Hello,

Would it be possible for VelocityAP to provide just straight downpipes, without catalysts? Also, will there have to be another ECU map compared to the one VelocityAP has developed for the 200-cell cats? Any other non-sound related things to consider? Will the power and torque figures be the same or different compared to the 200-cell cats?

Thanks,