Hi, I am thinking of putting a Stradale exhaust on my Modena Is it so that under 4000 rpm the sound is very quiet (same as stock Modena) and that after that hell breaks loose because this is what I want Quiet cruising and not waking neigbours nor drawing attention to the car but a race sound when flooring ... I now have a Capristo loud thats very nice under acceleration but too loud for low speed traffic in the city BTW I am selling the Capristo so if anyone is interested in buying it or exchanging for a stradale exhaust ...
it is not quiet at idle. it's a loud car. it's just all relative. i can wake the kids up just by turning the car on. the neighbors have made comments about the exhaust volume - all below 4K RPM. i've kept meaning to take some measurements of idle with my SPL meter but haven't yet. doody.
I agree, I had a Capristo Level 2 w/straight pipes on my Spider and it was louder DEFINETELY at lower rpm and I think it was louder at higher rpm too ..now stradale w/test pipes would be interesting
I had a stock exhaust on my '00 Modena with the valves left open at all times. It was a very satisfying sound for me (rumble) at idle and became a nice shriek above 4k rpm's. The stock Stradale exhaust on a Stradale is at least 25% louder at idle and closer to 50% louder at higher rpm's.
Are the vacuum lines connected to your muffler bypass valves? Mine was very loud until I reconnected them.
Possibly under 4000 RPM. Hard to compare, but it does make sense that less back pressure would imply more power.
How does a CS exhaust compare to a stradale exhaust? SOunds like test pipes only would make a stradale sing like the best of 'em
An engine is an air pump. The more air you can flow, the more power. No muffler implies more air flow. All cars should show more power with no muffler (like Vipers), but that's usually seen at higher RPM when the muffler can't flow the air. For a CS, the muffler could probably flow the air under 4000 RPM. However, with the lines off, you may get more power in certain parts of the RPM range where the muffler bypass usually kicks in. In other words, you may eliminate the "non-linearity" in the engine's power curve.
i've heard a stradale that had the vacuum lines on the by-pass valves disconnected. it did not have a good sound. it sounds like an old boat at idle and low revs. it sounds better with the vacuum lines connected. if you want to change the sound of the stock exhaust consider a tubi NGT or a capristo L2 or L3.
I just installed a Tubi NGT to my CS and its definatly sounds better (lots better!!!) and louder below 4,000rpms. Above 4,000rpms it does not appear louder than the stock CS system but had a more rounded sound, less raspy than the stock exhaust. In addition it looks great and cuts another 27llbs from the car. Is it really worth the price? probably not, but then again its just money.........
I guess I am coming around The GT2 was'nt that bad I guess but it was to much for me personally When I get the time after the holidays I will see how the CS compares IMO and see if it is more to my liking.
Sure. You open up the exhaust for more airflow, you also need to provide more air to come into the engine. Unless the stock exhaust is restrictive in regards to the rest of the engine, you will lose much valuable low-end torque by removing the backpressure. This is exactly what happened with my 360 Modena when I installed an aftermarket exhaust. I didn't feel any of the horsepower at the top end, but I sure felt the decrease in low-end torque. Do we even know that those valves actually bypass the entire muffler? If so, it makes sense to have those valves hooked-up as they allow a free-er flowing exhaust at higher rpm's where horsepower has taken over torque. Personally, I don't feel any non-linearity in the power curve.
I just read what I posted and I mistyped...What I meant was how does a Tubi compare to the CS? The dealer told me not to add a Tubi to a CS because the CS stock exhaust made more power and sounded better than Tubi. I also think that I used poor choice of words with my noisy trap statement and it came across in the wrong way
don't be in a rush to change the stock stradale exhaust. the stock exhaust is really good, but at idle it's a bit "thin". low revs is not as loud as some would like, but it has a good tone. but when you drive the stradale hard and that exhaust valve opens the stock exhaust sounds fantastic! it's a raspy shriek. the tubi NGT is also very good (has more volume at idle and low revs) but it has a some what lower tone than the stock exhaust. the capristo is also very good and has a higher pitch shriek. you can't go wrong with any of these choices: stock, tubi NGT or capristo. i've been driving my stradales for almost a year, and initially i was considering upgrading the exhaust. but over the months i've had many chances to listen to other stradales with various exhaust options. i've given this a lot of thought, and i have decided to stick with the stock exhaust
That's exactly my point. Aftermarket exhausts alone on naturally aspirated engines do not necessarily improve performance. I think the factory does an excellent job tuning exhaust for optimum performance.
