exhaust installation // sound check // dyno run

ChrisUR · 02-14-2011, 01:16 PM

Hey folks,

just wanted to share a video I made a few weeks ago for my newly installed exhaust system.

I did a base dyno run and the car ended up with 336HP (best run) being totally stock - very nice starting point

after the exhaust was installed I dyno'ed again (same dyno, one day later) and best run was 347HP.

The average difference between all runs made was always about 10-12HP.

before someone asks, yes this is basically the exhaust system already discussed here in the forums but with a cut-out option installed (as mentioned in the video).

hope you like it !

Chris

Red__Zed · 02-14-2011, 01:47 PM

nice. I miss having an exhaust cutout, and the instant opportunity to be obnoxious.

Looks like good power gains too!

Juruki · 02-14-2011, 02:23 PM

sounds amazing!
Whats this cut-out option that you mention? Is it something the shop did for you or an option on the the prospeed N1 offers?
Do you have a button you press to change between race and street?

ChrisUR · 02-14-2011, 03:26 PM

its a modification to the original 5Zigen Design where you have a resonator between the two mufflers. We added a flange there so you can go from "street legal" to "race" by swapping the resonator with a 90° cut-out pipe.

The really nice thing with this mod is that when at idle the exhaust sounds completely "street" and only when depressing the throttle over say 50% the cutout makes that extra noise. So you can drive the exhaust daily even with the cutout mounted and it only gets loud when you wish to.

The reason for keeping the resonator as an option is mainly because we need a "ECE-certificate" (ECONOMIC COMMISSION FOR EUROPE) for being street legal.

Chris

PS: all outdoor scenes and the final dyno run are with the cutout installed while the sound during the exhaust installation is with the resonator mounted (driving the car at the F1 Grandprix track Hockenheimring in Germany).

CrownR426 · 02-17-2011, 12:12 AM

Not to be crazy and all but I highly doubt you are at 336 with just an exhaust.
That's crazy...
Secondly what kind of dyno was this?
Sounds alright.

christian370z · 02-17-2011, 12:31 AM

I think you are on a very optimistic dyno, it is highly unlikely you put out more power with just a catback than most do with full intake/tune/exhaust. That said, it sounds great and cool video editing!

Jordo! · 02-17-2011, 01:10 AM

At the risk of starting a huge war... I've noticed that whatever kind of dynamometer tends to be widely available in Europe always seem to read high, and the estimates they provide should be interpreted as crank hp NOT whp.

Also, Pferdestarke (PS) units are a lil bit higher than hp...

see further here Power Units Conversion Calculator

On a dynojet that car would be putting down around 288 - 290, SAE corrected, which is about right for a nice exhaust on an otherwise stock Z.

ChrisUR · 02-17-2011, 02:47 AM

yes, in Europe we always talk about crank HP, not WHP !!! that would be crazy numbers ;-)

also PS is a bit higher than HP I have already converted that.

My car had a very good base line dyno run which was better than what NISSAN advertises.

I checked the dyno sheets again and the
STOCK exhaust dyno was: 215.9kW at the wheels --> 289 WHP
prostreet n1 dyno was: 220.1kW at the wheels --> 295 WHP

hope that makes more sense now :-)

Chris

Jordo! · 02-17-2011, 05:41 AM

Quote:

Originally Posted by ChrisUR

yes, in Europe we always talk about crank HP, not WHP !!! that would be crazy numbers ;-)

also PS is a bit higher than HP I have already converted that.

My car had a very good base line dyno run which was better than what NISSAN advertises.

I checked the dyno sheets again and the
STOCK exhaust dyno was: 215.9kW at the wheels --> 289 WHP
prostreet n1 dyno was: 220.1kW at the wheels --> 295 WHP

hope that makes more sense now :-)

Chris

That's still a bit higher than would probably be found on a dynojet... but different dynamometers read differently

In any case -- the % improvement from baseline, whichever values you go by looks about right for an exhaust with factory cats.

christian370z · 02-17-2011, 11:35 AM

Quote:

Originally Posted by ChrisUR

yes, in Europe we always talk about crank HP, not WHP !!! that would be crazy numbers ;-)

Haha, sorry for my comment then as I did not know. Still, nice gains!

One_Quick_Z · 02-17-2011, 11:38 AM

Yeah thats calculated Fly wheel hp people dont get your panties in a bunch

That is why he didnt put whp next to his numbers

DAN

definitionxmk · 02-18-2011, 01:30 PM

great info though!

02-14-2011, 01:16 PM	#1 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	exhaust installation // sound check // dyno run Hey folks, just wanted to share a video I made a few weeks ago for my newly installed exhaust system. I did a base dyno run and the car ended up with 336HP (best run) being totally stock - very nice starting point after the exhaust was installed I dyno'ed again (same dyno, one day later) and best run was 347HP. The average difference between all runs made was always about 10-12HP. before someone asks, yes this is basically the exhaust system already discussed here in the forums but with a cut-out option installed (as mentioned in the video). hope you like it ! Chris __________________ ProStreet N1 exhaust \| ProStreet N1 Y-Pipe \| STILLEN G3 Intake \| NST Pulley Kit EIBACH Pro-Springs \| EIBACH Pro-Spacers \| EIBACH Sway Bars \| SEIBON GT2 Rear Wing MOCAL Oil Cooler 25row\| STILLEN TransCooler \| STILLEN PS Cooler \| STILLEN Front Fascia

02-14-2011, 02:23 PM	#3 (permalink)
Juruki Track Member Join Date: Mar 2010 Location: SoCal Posts: 965 Drives: 370Z Tour/Sport/Navi Rep Power: 16	sounds amazing! Whats this cut-out option that you mention? Is it something the shop did for you or an option on the the prospeed N1 offers? Do you have a button you press to change between race and street? Last edited by Juruki; 02-14-2011 at 02:27 PM.

02-14-2011, 03:26 PM	#4 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	its a modification to the original 5Zigen Design where you have a resonator between the two mufflers. We added a flange there so you can go from "street legal" to "race" by swapping the resonator with a 90° cut-out pipe. The really nice thing with this mod is that when at idle the exhaust sounds completely "street" and only when depressing the throttle over say 50% the cutout makes that extra noise. So you can drive the exhaust daily even with the cutout mounted and it only gets loud when you wish to. The reason for keeping the resonator as an option is mainly because we need a "ECE-certificate" (ECONOMIC COMMISSION FOR EUROPE) for being street legal. Chris PS: all outdoor scenes and the final dyno run are with the cutout installed while the sound during the exhaust installation is with the resonator mounted (driving the car at the F1 Grandprix track Hockenheimring in Germany). __________________ ProStreet N1 exhaust \| ProStreet N1 Y-Pipe \| STILLEN G3 Intake \| NST Pulley Kit EIBACH Pro-Springs \| EIBACH Pro-Spacers \| EIBACH Sway Bars \| SEIBON GT2 Rear Wing MOCAL Oil Cooler 25row\| STILLEN TransCooler \| STILLEN PS Cooler \| STILLEN Front Fascia

02-17-2011, 12:12 AM	#5 (permalink)
CrownR426 A True Z Fanatic Join Date: Nov 2008 Location: South Korea Posts: 4,676 Drives: Manual Rep Power: 848	Not to be crazy and all but I highly doubt you are at 336 with just an exhaust. That's crazy... Secondly what kind of dyno was this? Sounds alright. __________________ Love + Hardwork + Passion RIP SVTRacer

02-17-2011, 12:31 AM	#6 (permalink)
christian370z A True Z Fanatic Join Date: Jul 2010 Location: Newport Beach Posts: 3,900 Drives: 2010 370Z/Saab 900se Rep Power: 432	I think you are on a very optimistic dyno, it is highly unlikely you put out more power with just a catback than most do with full intake/tune/exhaust. That said, it sounds great and cool video editing! __________________ -320whp / 259wftlbs- SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

02-14-2011, 01:47 PM	#2 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	nice. I miss having an exhaust cutout, and the instant opportunity to be obnoxious. Looks like good power gains too!

02-17-2011, 01:10 AM	#7 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	At the risk of starting a huge war... I've noticed that whatever kind of dynamometer tends to be widely available in Europe always seem to read high, and the estimates they provide should be interpreted as crank hp NOT whp. Also, Pferdestarke (PS) units are a lil bit higher than hp... see further here Power Units Conversion Calculator On a dynojet that car would be putting down around 288 - 290, SAE corrected, which is about right for a nice exhaust on an otherwise stock Z. __________________ Enjoy it. Destroy it.

02-17-2011, 02:47 AM	#8 (permalink)
ChrisUR Base Member Join Date: Jun 2010 Location: Germany Posts: 116 Drives: 370Z Black Edition Rep Power: 15	yes, in Europe we always talk about crank HP, not WHP !!! that would be crazy numbers ;-) also PS is a bit higher than HP I have already converted that. My car had a very good base line dyno run which was better than what NISSAN advertises. I checked the dyno sheets again and the STOCK exhaust dyno was: 215.9kW at the wheels --> 289 WHP prostreet n1 dyno was: 220.1kW at the wheels --> 295 WHP hope that makes more sense now :-) Chris __________________ ProStreet N1 exhaust \| ProStreet N1 Y-Pipe \| STILLEN G3 Intake \| NST Pulley Kit EIBACH Pro-Springs \| EIBACH Pro-Spacers \| EIBACH Sway Bars \| SEIBON GT2 Rear Wing MOCAL Oil Cooler 25row\| STILLEN TransCooler \| STILLEN PS Cooler \| STILLEN Front Fascia

02-17-2011, 11:38 AM	#11 (permalink)
One_Quick_Z A True Z Fanatic Join Date: May 2009 Location: Seneca Il Posts: 1,374 Drives: 10 Civic EX Sedan Rep Power: 219	Yeah thats calculated Fly wheel hp people dont get your panties in a bunch That is why he didnt put whp next to his numbers DAN __________________ -My BRZ with exhaust will decimate all if we overnight parts from Japan- 10 Civic EX Sedan- Current Daily

02-18-2011, 01:30 PM	#12 (permalink)
definitionxmk Track Member Join Date: Jul 2009 Location: Los Angeles CA Posts: 973 Drives: Stage 2 SC 370Z Rep Power: 17	great info though! __________________ *FALKEN . AMUSE . STANCE . INVIDIA . MINES . TOMMY KAIRA . BRIDE . VOLK RACING . GTM* Featured in DSPORT issue #137 - Follow me on Instagram: @definitionxmk

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