SPIDER X... Very well explained, and completely satisfys my question. To be totally honest, I'd be ordering this exhaust even if it didn't make more power than the milltek in the closed position. I love the video clips, and the open position is definitely nasty! Thanks for all the insight into the development on this product!

 

Thank you and your welcome but the honor is mine

This exhaust does make my car more fun I will say that for sure

 

I just love the idea of having a power/noise switch. A little surprise is always a good thing.

 

GREAT Videos!! WOW!! My previous 3 cars: 5.0 Mustang, Z28 Camaro, C5 Vette all had straight pipes. The last two: SLP Loudmouth Exhausts!! I am use to constant loud and drone. This system--when open is outrageous. All that noise a 4 cylinder!! Impressive. I am currently content with my Magna Flow---But. Thanks for all the work. Excellent commentary on the videos. You guys should contact the Speed Channel. You could produce a show demonstrating various cars and exhaust systems on the street!! Where most of us do most of our driving.

 

Nascarvision ........ er, uh,..... Speedvision aka "all Nascar, all the time"

I would love that .....would you be our agent?

 

Sounds good open or closed. The VIDS are great, you went way out of your way to give all of us an appreciation for the sound. If you could have worked a BABE into the vid, I'd be putting you up for a nomination .

 

I had to edit my reply

 

Had you used a model - it wouldn't have mattered how it sounded, webb would have sold out a years worth of production and your back would be feeling a lot better or much worse depending .............

What can I say, I've been on this island too long.

 

 

 

:smile:

 

I have that custom made decal pasted on the boot...the nascar guys can't quite figure it out

 

I have dynoed the car on a Dynojeat and a Dynopack.

The dynojet I have never been to before.....they were supposed to take me at 7:00 but there was a Corvette with problems so it was more like 8:30. They do not use sniffers so there were no A/F measurements or temps etc this was just whp. Even the fan was totally inadequate.

The car made 8.5 more whp in the open position and moderate 3-5 more lbs of torque. I was not unhappy or happy....I would have liked more but 8.5 is not bad on a switch.

I then went to the dynojet where I have been before and we did not show any significant gains in whp.... but there were positive gains for both open and closed positions with open being slightly better......disappointment with th whp but the bright note was ....but I dynoed at this place in JUly and the dyno showed a whopping 10 more ft lb of torque across the spectrum over July......since hp and torque play off each other, I found this to be odd I figured that I added a custom tune a crank pulley and I'm sure a few other things so I discounted the contribution of the exhaust either open or closed.

I am driving around and feeling like this exhaust is loud and I wanted to do a couple of dyno runs with the Milltek back on and see what the exhaust was really giving me. I took the WMS off and put the MIlltek on

Ahhhhh quiet

The WMS system idles at 88 db "C" wieghted in the drivers seat

The MIlltek is at about 82

The WMS routinely hit 100 db in the closed position at a resonant freq that occurs at 3000 rpm. When you put you foot into it, peaks of 104-106 happen in the car..... In the open position you can add about 6 db to that...it gets loud.. Outside the car standing behind about 4 ft away the idle goes from 92 to about 96 closed and open respectively at idle and being that you are outside the sound does not get too rediculous when you rev..... very much like inside.......

I also did several roll ons from 60 -90 and the car did a low of 7.15 open and closed to a high of 8.76 closed. It also did several 7.35-7.55 in the closed position...... there were both open and closed in the 7 and 8s with the open position consistently the fastest. Please know that this is me watching the speedometer with a stop watch etc so this is not very accurate.

Now here is the really intersting part...........drum roll........

With the Milltek on the car feels like it has lost a ton of punch. The BEST i could get out of the same test was mid 9s with some runs in the 10s....The WMS system is at least 2 seconds faster from 60-90 5th gear... that is huge to me. I immediately called Randy and told him. I called the fabricator and told him. With the WMS the pedal has feel and punch and with the Milltek the car feels (relatively ) anemic. (I was delighted with the Milltek over my Borla street and the Borla street over stock) I am going to try to dyno the car on Monday and then change back to the WMS prototype......I miss the power allready.

Randy is making some desing choices as we speak and if he can get it quieter and preserve the performance he will....but if performance suffers to much then those who don't mind the SPL ....C'MON.

One last thought about dynos........HMMMMMMMMMM....they are inconsistent from one brand to the next. I have used 5 different ones now and they don't agree.

 

What were the differences in temp and humidity between your July runs? That would make a difference between the runs. Exhaust sounds like a winner if Randy can get the db's down without a loss in HP. With all the stuff you have on the car you don't have a wideband bung on your exhaust.

 

It's extremely difficult to get quality results on the dyno. A tune that works perfect on the dyno will likely be garbage on the road. As you saw in the real world there were significant gains from the exhaust but it was difficult to show it on the dyno.

 

Dyno's are for bragging rights Time your car on the road for real results. I'm not talking street racing...just testing on a safe, clear road basically from around 50 to 80mph so this easily accomplished on any back roads or freeway. I'm not into stressing my toy at drag strips but I trust 3rd gear runs from 3500 to 6000rpm as Randy Webb does. No reaction times involved/no shifting/no traction issues/no dyno...just time, like it or not According to his measurements from a 210whp (which I believe) Mini with the Alta LWCP, he accomplished this in 6.6 seconds in 3rd gear. Make necessary altitude adjustment and anyone can compare car to car. I just might start another thread and see who'll post their times according with this method

 

msfit: start the thread; just spec the conditions...much, much, better than dyno runs.

seems to me 1/2 the goal of the WMS exhaust should be comfort when closed at whatever the expense in power. After all, that is what the open position is for.

 

I know..I know my pants are down......I will add one

 

That is almost a direct quote from my conversation with Josh Murray from UNichip and is an AXIOM in my lexicon.

 

I have to credit "jlm"' for his suggestion to me for "roll ons."

The thing is that the Milltek is not at all like "stock" it is somewhat loud as well and for me the difference in volume is ot enough to justify the lack of performance. (I may not be expressing this well) I like the power at my foot......it just feels good......and the volume is "liveable" whereas open is too loud except for the track or "what have you."

please remember the product is not done yet.

 

Yes...it's done. Screw the Dyno

 

I will post more performance info later

meanwhile I am really missing the WMS exhaust.

 

Is it? Why, yes, it is.

Permanent hearing damage will occur after 4 hours exposure to sound levels of 88 dB.

If that weren't bad enough, you will suffer pretty severe permanent damage and hearing loss in less than 1 minute of exposure to the 112 dB that has been measured at WOT in the open position.

You have about 15 minutes at the resonant frequency in the closed position, and that's crusing on the highway at 70ish in 6th gear, with 100 dB levels.

I know we all love our sound, and rumble, but I wanted to caution you about the dangers that this particular exhaust poses. There's a reason that company exhausts are only so loud, like the Miltek at 82 dB idle. 85 is the threshold for permanent damage.

Randy, you need to think about ways to quiet the system down, or you'll have a lot of deaf customers on your hands.

 

WHAAAAAAATTTT!?!?! I CANNOT HEAR YOU....

 

I will take some more readings tommorrow. If I remember I was over 90 db in 6th at 3K with the Milltek. That would be cruising to anywhere. I have access to some audiology data as well........

Also Randy feels that the Milltek header that I have adds a lot to the sound. There are going to be some tests with the stock header.

You raise an excellent point.......btw a great deal of the energy is below 500hz