I WANT THAT VALVE ALREADY!!!!

Question though, with the current setup (no valve) the open side is 3" in diameter with the open plate. It looks like from the picture that the valve opening is smaller than the full diameter of the pipe? Will have have an effect on sound or performance? Maybe Randy or Brian can answer that.

 

Nice.

More bench talk here so don't take this as anyting else.

From the size of the butterfly valve it looks like there will be enough back pressure that an amount of the exhaust gasses will still go through the muffled side.
Anybody seen, heard, imagined, sepculated, consulted tarot cards, ouija board, etc on what the flow split might be with the valve open?


What is the dia. of the valve?

 

That is a good point..... my feeling is that I have had the exhaust on my car with that valve and it put out an extra almost (dyno tested) 10 whp when I opened it.... remember this is a "street" first sytem...... if you go with the "plate" also pictured you will remove the restriction of the valve and probably get some more power (who knows) but and xtra 10 is good enough for me for the convenience...... race people will just put in a 3" sytem and some will use the plate.... the switch is a compromise that I will take.....

had i not experienced the "valve" I would have similar concerns

This system is built beautifully I will drive the car later and give you a report

 

Great, thanks.
I doubt it would have any real impact it was more of a "what if?" kind of question.

 

Some news is better then no news right

 

Some news.....? this is great news.. this is production.... units are starting to ship....

 

It looks awesome...I'm anxious to get word the valve is ready for shipment with exhaust.

One thought regarding backpressure from the possibly smaller opening where the valve will go...

exhaust comes down the middle pipe, hits the V... Valve is open, less resistance, more will flow down the open side. IF there was any backpressure from the smaller? opening, then I think it would be cancelled out by the actual backpressure from the muffler coming back the same way, assuming that some exhaust pressure will flow that way. One way to tell... SpiderX... is there any airflow coming from the muffler side when the valve is wide open? A lot? or just a breeze?

 

Hmmmm thats really surprising, why isn't the valve at the split basically directing flow in one direction or the other? Otherwise when the valve is open you still can have alot of gases splitting off down the muffler. Or when the valve is closed you have alot of gases going half way down the open side and getting caught up there trying to push its way back to the other side and get out the muffler.

I know the valve would have to be alot more complicated switch at the split but wouldn't all work a whole lot better? Just that thought of VERY hot gases pushing against that valve for long periods of time seem to be a concern on how long it will hold up.

Also another quick question, is there any kind of blockage in the pipes between the tips?

 

My feeling here for your answer is cost... it would be VASTLY more expensive to engineer a valve to handle the flow at the split. It could also be argued that having air flow both ways when the valve is open is still flowing better that just one side is capable of. As far as the valve quality and longevity, I believe only time will tell. I'm positive that WMS isn't going to use anything they don't trust...and their standards are quite high indeed.

Enough tech discussion for me... I don't care how it works, I just care that it works! and by now, Spider X KNOWS, don't you sir?

 

Actually, I do........ I just got back from driving the car and I will tell you several things

1) in the closed position it is much quieter than before....yes
2) I still get 15 lbs in the closed position WOT... yes
3) open is "kick ***" no question about it.....yes
4) you guys that want an aggressive sounding sytem open or closed are gonna like this.... yes

However, I am not going to keep it on my car for this reason..... I HATE this but I have to face that I am 55 and that the sound is too agggressive for me.... not loud.... but aggressive...... I know there are several of you going YES.... I need it now... and you will be happy...very happy.

I am going back to the Milltek because it is "kinder and gentler."

... Randy and I have had a discussion and he will make an announcement regarding his plans...... without stealing his thunder...it is all good.

 

OMG, next thing your going to say is you want a "refined" exhaust.

 

Are you going to be parting with it then?

 

I have been reluctant to post yet as I have been wanting to talk with Randy. I was out at WMS last week to have a whole bunch of stuff done to the car. The exhaust was one of the installations. I was not expecting it to be as "aggressive" as it was in the closed position. My wife and I drove back to Chicago and it was darned near impossible at times to carry on a conversation. It was reasonable in the 75-80 range( but still wearing), got louder after that, but it is really loud at the 60-70 range, which at least here in Chitown is typical. There is also a rattle/vibration/resonance/rasp at 2500-3000 RPM that sounds tinny and as if there is a loose baffle?? in the exhaust. This seems to cheapen the sound of the system. When putting the pedal to the metal it is very loud, so around town the sound was very noticeable and I know I will have to be careful not to draw the local gendarmes attention.

Damn, I like the quality of the piece and the idea behind it. It should be the best of both worlds, but that means that the closed side should be more Milltek/Borla like. What's the point of two loud sides? The idle is the best part . . . it's really outstanding and unlike anything else you have heard.

Please note that I also have the Miltek header, WMS head, 4% larger crank pulley so I am flowing more through the exhaust, which I am sure makes a difference in the noise.

Just this evening my son layered Dynamat into the rear hatch, rear bumper and over the pattery compartment, in an attempt to quiet the inside of the car. I won't have a chance to drive it until tomorrow and Friday. I'm hoping this helps quite a bit. But it still won't solve the 2500-3000 rpm rasp.

I will be talking to Randy about this.

 

Any word on the gintani w2a cooler?

 

You're right Spider X, I am one that won't care all that much. I drive my mini around town only, and a few autocrosses now and then.

Nasty resonance... well, I'll deal with it if I have it... I've considered taking out seats and doing the floor anyhow at some point, so this will just expedite that process.

Yeah, aggressive is fine with me. I await the WMS annoucement any day now... it's TIME Randy... let's do it brother.

 

Actually, you were just the guy I had in mind...... I think you are gonna like this..... sounds like a track car open and sounds like a track car closed....just less db...... all hell breaks loose open at WOT and I mean all hell.

 

Hmmmm wonder if WMS will be giving rides at the Dragon with this system. Now i really want to hear it.

The Video's really must not do it any justice..

 

Wow. So now I really need to hear a direct audio file comparison between this and one of the other mainstream systems. I'm fine with aggressive, I'm fine with loud. But droning at cruising highway speeds is iffy. And, well. The Law is always a concern.

Still hopeful. But the cost is killer. Understandable, but killer.

 

I'm bringing ear plugs for your dyno runs Ben

 

Get some video for me!

-Cody

 

SpiderX... you did an awesome job showing off this system when you had the prototype.... any chance you can get us some video or audio clips that will work for us all? Maybe a DB meter reading somehow open and closed?

Thanks in advance if you can squeeze it into your busy schedule.

Are you keeping it on for the Dragon to help satisfy the curious masses?

 

Without getting into any more detail than I already have(see above), suffice it to say that it is LOUD!. It is difficult to carry on a conversation at highway speed. Around town every time you step on the gas you can't hear yourself think. It rattles or vibrates around 2500-3500. Not a pleasant sound.

I talked with Randy today. He will have a solution. You should talk to him if you want this current system.

 

I wonder if something got screwed up in production. The way you guys are all talking, it doesn't sound like your systems are as quiet as the one that WMS approved for production. If I recall, Randy gave it his blessing, and your comments certainly don't fit into the whole concept of street quiet first, track loud second type of exhaust.

I'm guessing there is a reason there hasn't been a big WMS Exhaust is ready announcement, with numbers and pricing yet.

 

Suffice it to say that they have not turned as Randy or anyone else expected Stay tuned

 

first...thanks for the compliment.

second.... the system is/will be off my car today or tomorrow.....on its way to WMS for evaluation.

third ..... there is a lot of work that has gone into this as well as a nice piece of Randy's money...... I think controlling the entire development process is a big part of the plan..... but that is just my guess

BB