# Dr.Jekyll Exhaust = works well on new setup **URL:** \ **Category:** SON240sx Automotive\ **Created:** [November 16, 2008, 4:47am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909 "2008-11-16T04:47:22Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [November 16, 2008, 4:47am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/1 "2008-11-16T04:47:22Z")
Some of you have seen my car and know I’ve been running electronic exhaust valves for many years. Perhaps this will explain it. For reference, this is my current exhaust system…fabricated by Sasha at SGM. The 3" downpipe, a vband off a standard 2871r. Here you can see the beginnings of the “closed” exhaust section. ![http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Downpipe.jpg](http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Downpipe.jpg) The full system ready to be bolted up. ![http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Downpipe%20and%20Dump.jpg](http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Downpipe%20and%20Dump.jpg) ![http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Dump%20Tube.jpg](http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Dump%20Tube.jpg) And the results. These are two back-to-back done runs done within 10 seconds of each other. The only changes done are the opening of the valve from inside the cabin. (Solid lines are exhaust open). As you can see there were huge gains in spool and torque. ![http://www.u2ndyno.com/gallery/Project%20S14%202008/o_SR20DET%20GT2871R%20SM4.jpg](http://www.u2ndyno.com/gallery/Project%20S14%202008/o_SR20DET%20GT2871R%20SM4.jpg) This is a stock SR20DET Redtop motor that I got for $400. It has Apexi HG, ARP Studs, GT2871R .64, Nismo 740cc…tuned with Autronic SM4. This is a stock cam, stock manifold car. I basically wanted to test how easy it was to make 300ft-lbs on the least mods on an SR20DET. The car made 335rwhp and 305tq at 15psi with no boost control. The engine mid build ![http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Motor.jpg](http://www.u2ndyno.com/gallery/Project%20S14%202008/o_Motor.jpg) ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [November 16, 2008, 6:26am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/2 "2008-11-16T06:26:07Z")
welding is top notch , cant wait to see this car back on the road farmer ---
**Author:** ![S13counterpart](https://avatars.discourse-cdn.com/v4/letter/s/3e96dc/32.png) [@S13counterpart](https://forums.speedlife.net/u/S13counterpart)\ **Post date:** [November 16, 2008, 8:36am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/3 "2008-11-16T08:36:56Z")
WTF!? I want an SR for $400. Those gains are quite impressive. And, mmmmmmmmmmm v-bands 😃 ---
**Author:** ![Polar\_s13](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/polar_s13/32/5572_2.png) [@Polar\_s13](https://forums.speedlife.net/u/Polar_s13)\ **Post date:** [November 16, 2008, 9:08am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/4 "2008-11-16T09:08:04Z")
What psi is that at…never mind just saw ---
**Author:** ![schwiin\_27](https://avatars.discourse-cdn.com/v4/letter/s/ecb155/32.png) [@schwiin\_27](https://forums.speedlife.net/u/schwiin_27)\ **Post date:** [November 16, 2008, 9:22am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/5 "2008-11-16T09:22:55Z")
now i have a question , ive seen these exhausts done on n/a’s on tv and what not really sick idea and ive thought it many times for my silvia, but with a turbo do you not have some required back pressure ? what kinda money did you shell out in the end? what would the difference be is you dumped it after the cat? ---
**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\ **Post date:** [November 16, 2008, 9:30am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/6 "2008-11-16T09:30:28Z")
I had to google what Dr. Jekyll meant hahahaha oh god ---
**Author:** ![Keez](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/keez/32/5570_2.png) [@Keez](https://forums.speedlife.net/u/Keez)\ **Post date:** [November 16, 2008, 10:32am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/7 "2008-11-16T10:32:04Z")
bah, dan…i love your s14! ---
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [November 16, 2008, 1:51pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/8 "2008-11-16T13:51:36Z")
> [@Ricers get what was coming to them](https://forums.speedlife.net/t/ricers-get-what-was-coming-to-them/19080/27): > > I had to google what Dr. Jekyll meant > > hahahaha > > oh god Oh come on…how old are you again? ---
**Author:** ![Theo23](https://avatars.discourse-cdn.com/v4/letter/t/43a26b/32.png) [@Theo23](https://forums.speedlife.net/u/Theo23)\ **Post date:** [November 16, 2008, 2:09pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/9 "2008-11-16T14:09:04Z")
> [@OFFICIAL Buffalo Sabres Thread](https://forums.speedlife.net/t/official-buffalo-sabres-thread/25170/535): > > Oh come on…how old are you again? Haha, I love it when you type Dan… I can always hear you say exactly what you type. Impressive numbers, I’m really hoping to see you driving more next year. Can you get quick release V-band clamps? I’ve always wanted to have a Y with a block off plate… I’d get in too much trouble with a remote operated cut-out. ---
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [November 16, 2008, 2:19pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/10 "2008-11-16T14:19:43Z")
Theo, I wouldn’t worry about a vband for that…I would just weld a 3 bolt flange on the end of the Y and use a plate held on with butterfly bolts. That way you could just reach under the car and spin the bolts off with you fingers…no tools required. ---
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [November 16, 2008, 2:28pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/11 "2008-11-16T14:28:39Z")
> [@fs 1977 nova](https://forums.speedlife.net/t/fs-1977-nova/18133/24): > > Impressive numbers, I’m really hoping to see you driving more next year. > . OH…and YEAH. When I took the car for a spin after I tuned it I was shaking like a leaf for like 20 minutes. I miss driving fast cars. I plan to do a lot of track driving next year…may even try this “drifting” thing if the mood strikes me. Oh and I just made a shitty little test drive video… as I back out of the shop you can hear me open the dump. [Y]\\\\\\\\\\[/Y] ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [November 16, 2008, 2:34pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/12 "2008-11-16T14:34:09Z")
Sounds good 🆒 Need some vids of it in the dry with you really opening up. I thought I was the only one who taps the shifter a several times to make sure its in neutral 🤣 ---
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [November 16, 2008, 2:43pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/13 "2008-11-16T14:43:44Z")
Nah man…everyone does it. And yeah, I need some dry road. In that vid I am on 275 BFG R1’s… not soo good. ---
**Author:** ![240sxfanatic](https://avatars.discourse-cdn.com/v4/letter/2/82dd89/32.png) [@240sxfanatic](https://forums.speedlife.net/u/240sxfanatic)\ **Post date:** [November 16, 2008, 3:42pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/14 "2008-11-16T15:42:40Z")
Im confused as to what this does. Does it divert the exhaust into the dump tube on WOT in addition to the exhaust? So more exhaust flow? ---
**Author:** ![Silvia\_Drift](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/silvia_drift/32/5271_2.png) [@Silvia\_Drift](https://forums.speedlife.net/u/Silvia_Drift)\ **Post date:** [November 16, 2008, 10:56pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/15 "2008-11-16T22:56:48Z")
Damn this is very cool. So its just a custom turbo extension and downpipe that would bolt up to the stock exhaust right? I want one :). ---
**Author:** ![Tacoboy](https://avatars.discourse-cdn.com/v4/letter/t/2acd7d/32.png) [@Tacoboy](https://forums.speedlife.net/u/Tacoboy)\ **Post date:** [November 16, 2008, 11:03pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/16 "2008-11-16T23:03:52Z")
> [@240sxfanatic"](#): > > Im confused as to what this does. > > Does it divert the exhaust into the dump tube on WOT in addition to the exhaust? So more exhaust flow? im sure its an electrical dump. He flicks a switch, opens the dump, and boom - no restrictive exhaust. ---
**Author:** ![Theo23](https://avatars.discourse-cdn.com/v4/letter/t/43a26b/32.png) [@Theo23](https://forums.speedlife.net/u/Theo23)\ **Post date:** [November 16, 2008, 11:29pm UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/17 "2008-11-16T23:29:50Z")
> [@2008 Volvo C30](https://forums.speedlife.net/t/2008-volvo-c30/3000/16): > > Theo, I wouldn’t worry about a vband for that…I would just weld a 3 bolt flange on the end of the Y and use a plate held on with butterfly bolts. That way you could just reach under the car and spin the bolts off with you fingers…no tools required. The 3 bolt flange was the original plan, but a v-band would be even quicker!! And less chance of bolts loosening off… Do they make v-band quick clamps or are they all a single bolt type? ---
**Author:** ![Qred13](https://avatars.discourse-cdn.com/v4/letter/q/8c91f0/32.png) [@Qred13](https://forums.speedlife.net/u/Qred13)\ **Post date:** [November 17, 2008, 9:04am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/18 "2008-11-17T09:04:32Z")
Awesome, what wastegate are you runing? ---
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [November 17, 2008, 10:17am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/19 "2008-11-17T10:17:26Z")
> [@On another topic](https://forums.speedlife.net/t/19094/24): > > Awesome, what wastegate are you runing? This turbo is internally gated…so just the standard wastegate that comes with Garrett turbos ---
**Author:** ![Intense\_Motorsports](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/intense_motorsports/32/5593_2.png) [@Intense\_Motorsports](https://forums.speedlife.net/u/Intense_Motorsports)\ **Post date:** [November 17, 2008, 10:44am UTC](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909/20 "2008-11-17T10:44:42Z")
^What software are you tunning with? Doesn’t look like AEM to me. Adrian [Next page](https://forums.speedlife.net/t/dr-jekyll-exhaust-works-well-on-new-setup/119909.md?page=2)