flaagan

I've heard x-pipes can help cut down the drone some aftermarket mufflers put out at freeway speeds, care to comment?

Also, I kinda like the crackle pop, wish I could cut down on drone but keep that.

Dominic Toretto

I actually like both

-Alex

flaagan

The drone may not be as much of an issue when I swap trans out for a stickshift, but being a 'vert I get enough noise in that thing already!

itzza427

Yes they will tame drone to some extent. Rode with a friend several years ago to Fun Fest in an 01 A4. Even though he had Corsa Touring,,there was a certain RPM range where there was a light but noticeable drone. He had a Corsa X-pipe installed there,,and it was totally gone on the ride home and there was a noticeable smoothing effect to the overall sound!! I'm sure it is NOT going to work miracles,,but it WILL be of some help. Maybe from unbearable to just kinda annoying? It could make the difference if it is just kind of borderline annoying and bring it to tolerable!!The blending of pressure CAN take the edge off of what would be a resonant wave. Sound is VERY subjective,,one mans noise is another mans music!! Give it a try and see.

0Todd@EastCoastCorvettes

just in case you have not seen the picture on my web-site, i took a picture showing the restricted factory H, this image illustrates why it is so restricted. the X-pipes from Bassani, MagnaFlow and WCC are all completely open.

Click here for the original X-pipe, developed by Bassani and currently on sale, 10% OFF and FREE ground shipping.

Click here for MagnaFlow X-pipe.

Click here for WCC X-pipe



I hope this helps.

Todd
East Coast Corvettes

roadracerex

How about HP? Which one makes the most? I am not talking about what is written in a sales brochure. Dyno numbers? Anyone? I have the 12649 Borla exhaust and SCCA stock rules will let me change the h-pipe as long as I leave the cats. I want the most power, regardless of sound.

flaagan

Sweet jeebus, it's that restricted?

0Todd@EastCoastCorvettes

the 3 i listed link to, are all going to be the same. as you can see from the images, these 3 have the same style open x.

i was there when the bassani was dynod back in 1999 i think and the #'s listed are what we saw on the dyno, it showed a peak 6hp and 8 ftlbtq. there was a gain for both #'s all the way across the graph, but those are the peak #'s and what everyone advertises.







Todd
East Coast Corvettes

itzza427

flaagan,,its not that it is that restrictive,,you have full 2 1/2" mandrel bent pipes all the way back. With this set up it is just the fact that there is no help whatsoever from the H. It is just 2 independent pipes to the rear. To respond to roadracerex,,that to would be hard to quantify,,even on a chassis dyno. If you are running a stock ECM EVERY time,,for quite a few pulls,, your drivetrain will show HP and TQ gains JUST from doing WOT runs!! A couple of years ago Valvoline used my FRC on a dyno display at the Mid-West Nationals close to St.Louis. They did 3 pulls the first round,,then 2 every hour for a total of 13 pulls. I had only a Blackwing and Corsa Touring,,still had the stock H. RWHP went from 323.4 to 338.9 and torque went from 324.5 to 348.9. The ECM "adapts to a point to the type of driving you do. My car saw only street driving before. The computer kept doing minor "tweaks" to air fuel,,resulting in power/torque gains. Took it to test and tune a couple of days later and finished the night with a 13.08/110.24 in stock Goodyears. Further street driving"de-tuned" and later T&T nights only netted 13.1"s and 13.2"s. My opinion,,that muffler and X-pipes get SOME of their gain JUST from the ECM tweaking settings. This would make it difficult to determine just how much of the effect is computer,,and how much is the new system!!The different systems ALL will help,,but the differences are not enough to worry about. Pick one you like,and or get the best price on. There is NO real perceptible difference in performance as best as I've been able to research. A few laps with generous amounts of WOT time will be giving you maximum performance. A dyno tune that would lock in these WOT parameters would give you the best bang for your buck!!