Drivetrain Randy Webb's new exhaust
Originally Posted by skuzy
thats bloody heaps for a catback only. i was hoping it would be cheaper than the others.. oh well i guess u have to make a profit somehow.!
how much would headers cost then?!
how much would headers cost then?!
Regarding headers... Webbmotorsports carries one, and is testing another... but personally...I'll worry about the header later down the road... I'm saving for this bad boy when it's ready.
Toughest part it that if it truly comes out to be almost 9 bills, you could have a full Milltek system for only $100 more from some suppliers!!!
Dang, I though my home theater "problem" was a money pit!!
Joel
Dang, I though my home theater "problem" was a money pit!!
Joel
Is that 10+ hp over the 18 hp that Magnaflow claims, the 10 hp that RandyBMC claims (revised down from his earlier claims), the 6 hp that I measured on my car, or the zero hp that European Car magazine measured?
Originally Posted by F15EWeapon
this bird also mentioned the "possibility" that power could be in the realm of 10+ hp OVER the Magnaflow with the butterfly open... 7 hp more than the 'flow with it closed...
Originally Posted by andy@ross-tech.com
Is that 10+ hp over the 18 hp that Magnaflow claims, the 10 hp that RandyBMC claims (revised down from his earlier claims), the 6 hp that I measured on my car, or the zero hp that European Car magazine measured?
btw...... I have always found you "testy" but fair......... isn't this a bit "vulture" like and a bit beneath you?
Originally Posted by andy@ross-tech.com
Is that 10+ hp over the 18 hp that Magnaflow claims, the 10 hp that RandyBMC claims (revised down from his earlier claims), the 6 hp that I measured on my car, or the zero hp that European Car magazine measured?
NOW... if I were to guess... I'd say 10+ over RandyBMC's numbers, not Magnaflows. Just a guess though...
Asking for more information about gains is being a "vulture"? If so, send in the carrion! :smile:
BTW, I have been reading this book which has some interesting info applicable to this type of exhaust design:
http://www.amazon.com/exec/obidos/tg...419469-1511335
BTW, I have been reading this book which has some interesting info applicable to this type of exhaust design:
http://www.amazon.com/exec/obidos/tg...419469-1511335
Originally Posted by SpiderX
Being that it is "beta" and no claims have been made I guess you will have to wait like everyone else.......
btw...... I have always found you "testy" but fair......... isn't this a bit "vulture" like and a bit beneath you?
btw...... I have always found you "testy" but fair......... isn't this a bit "vulture" like and a bit beneath you?
Randy/Brian, a couple of questions:
1) Will the system be a bolt-on like the UUC, or a clamp-on like most others?
2) Will the butterfly valve be a) user switchable on/off, b) user variable, or c) throttle/exhaust pressure/vacuum sensitive?
Thanks.
1) Will the system be a bolt-on like the UUC, or a clamp-on like most others?
2) Will the butterfly valve be a) user switchable on/off, b) user variable, or c) throttle/exhaust pressure/vacuum sensitive?
Thanks.
Originally Posted by mr. zero
2) Will the butterfly valve be a) user switchable on/off, b) user variable, or c) throttle/exhaust pressure/vacuum sensitive?
Thanks.
Thanks.
Originally Posted by andy@ross-tech.com
Asking for more information about gains is being a "vulture"?
I can’t say the power gains yet since we are not on the final production piece, but you guys WILL like it.
BTW, I like the idea of an exhaust that has stock-ish noise levels when you don't need it but is a rip-snorting beast when you do. The reason I ditched the Magnaflow was that even when I was just cruising or driving at RPM below 6,000 it made tons more noise and drone than stock, despite yielding no useable power gains at those times. Hopefully, Randy's new exhaust will deliver the best of both worlds.
Originally Posted by andy@ross-tech.com
BTW, I like the idea of an exhaust that has stock-ish noise levels when you don't need it but is a rip-snorting beast when you do. The reason I ditched the Magnaflow was that even when I was just cruising or driving at RPM below 6,000 it made tons more noise and drone than stock, despite yielding no useable power gains at those times. Hopefully, Randy's new exhaust will deliver the best of both worlds. 
Originally Posted by mr. zero
Randy/Brian, a couple of questions:
1) Will the system be a bolt-on like the UUC, or a clamp-on like most others?
2) Will the butterfly valve be a) user switchable on/off, b) user variable, or c) throttle/exhaust pressure/vacuum sensitive?
Thanks.
1) Will the system be a bolt-on like the UUC, or a clamp-on like most others?
2) Will the butterfly valve be a) user switchable on/off, b) user variable, or c) throttle/exhaust pressure/vacuum sensitive?
Thanks.
-Brian
Originally Posted by Brian@WebbMotorsports
To answer your first question, we have not decided yet. This IS still in the prototype stage, so I don’t know for sure. Although we will most likely op for the clamp since that gives the most amount of adjustment. As for the valve operation, there will definitely be a user operated switch in the cabin, and we where also toying with the option of having it rpm activated using the Uni-Chip. However, after seeing the power and torque gains from the prototype, we may scrap that idea since it will take a lot of work to make it work properly. Hope that helps
.
-Brian
-Brian
indeed.. R32 has a stock exhaust simular to yours.. and has a rpm activated valve that opens above 3500 rpms.. pretty slick.. i keep mine open all the time with a C clamp..
Originally Posted by MSFITOY
Isn't this system essentially a single muffler system with an exhaust cutout?:smile:
I don't care if it's made of erector set... if it puts up the best gains on the market and looks and sounds good... I'm happy.
wow sounds good,
can't wait for the final version.
this bypass sounds like a great idea.
what sort of gains would something like this give if one of these bypass valves was fitted to the cat
i.e. if there was a bypass tube and butterfly for the cat?
I believe the cat is a big restriction on the exhaust if there was a bypass switch fitted, when needed it would close off the cat tube and open the cat bypass?
just thinking out loud.
where does one get such a butterfly valve?
can't wait for the final version.
this bypass sounds like a great idea.
what sort of gains would something like this give if one of these bypass valves was fitted to the cat
i.e. if there was a bypass tube and butterfly for the cat?
I believe the cat is a big restriction on the exhaust if there was a bypass switch fitted, when needed it would close off the cat tube and open the cat bypass?
just thinking out loud.
where does one get such a butterfly valve?
After inspecting the pictures a bit closer it looks like the butterfly valve is on the right side exhaust tube. I'm guessing two options will allow this, on one hand you have a "straight pipe" coming off the car, this will allow for a LOUD sound. The butterfly valve most likely will have to be used to fine tune the set up a bit better. Not really sure what he has planned but I am guessing some sound files will be shot down the system to find an optimal sound.
The huge muffler on the right side, quite the interesting design, I'm guessing the that exhaust gasses are building up in there and producing more of a deeper sound as well as providing some reduction to the sound.
The "scary" part of the system is upon closer insepction you have smaller tubes coming from the collector, then increasing in size. It looks like you have an interesting idea going on here.
If I could pose an idea about the butterfly valve, why not place a sensor inside the tube to read the "speed" of the exhaust gases, or "pressure", unsure if speed can be measure. Place a micro-controller with some type of setup rather than having a switch. This would allow for the exhaust to "AUTO-TUNE" it's self. I know this would increase the costs of the device, but would allow for a little cleaner setup, rather than using the stock ecu.
Just an idea.
The huge muffler on the right side, quite the interesting design, I'm guessing the that exhaust gasses are building up in there and producing more of a deeper sound as well as providing some reduction to the sound.
The "scary" part of the system is upon closer insepction you have smaller tubes coming from the collector, then increasing in size. It looks like you have an interesting idea going on here.
If I could pose an idea about the butterfly valve, why not place a sensor inside the tube to read the "speed" of the exhaust gases, or "pressure", unsure if speed can be measure. Place a micro-controller with some type of setup rather than having a switch. This would allow for the exhaust to "AUTO-TUNE" it's self. I know this would increase the costs of the device, but would allow for a little cleaner setup, rather than using the stock ecu.
Just an idea.





