Boosted Performance single turbo build

McNeil370 · 07-03-2012, 07:04 PM

open all the way for me

bring on the noise

these cars need a little more sound, to quiet for me, and the car should still be quiet when driving out of boost.

GaleForce · 07-03-2012, 08:07 PM

Quote:

Originally Posted by Boosted Performance

With all you guys that are on the "list", how may are looking at reciculating the wastegates and how many would like open dump tubes?

Remember open dump tubes = very loud

Open dump tubes will also be cheaper.

Open dump will only be loud if driving hard correct?

Just to get an idea on volume, is it a lot louder than running NA with HFC and CBE at WOT and high RPM?

Dembflyr · 07-03-2012, 09:21 PM

Quote:

Originally Posted by GaleForce

Open dump will only be loud if driving hard correct?

Just to get an idea on volume, is it a lot louder than running NA with HFC and CBE at WOT and high RPM?

Running open waste gates is as loud as open headers would be. And, yes it will only be that loud when you are on the boost.

Open waste gates are cool for about a month. Then it gets real tiring. Just recirc them and get a non resonated exhaust. I LOVE the refined sound that comes with recirculated waste gates.

GaleForce · 07-03-2012, 09:28 PM

Quote:

Originally Posted by Dembflyr

Running open waste gates is as loud as open headers would be. And, yes it will only be that loud when you are on the boost.

Open waste gates are cool for about a month. Then it gets real tiring. Just recirc them and get a non resonated exhaust. I LOVE the refined sound that comes with recirculated waste gates.

Rep'd

Cell · 07-03-2012, 09:31 PM

I would probably get recirc...

Dembflyr · 07-03-2012, 09:50 PM

Quote:

Originally Posted by GaleForce

Rep'd

Thank you sir!

Here are a few videos that I have taken that should show what I mean:

Open waste gates and Berk exhaust:

Open down pipes - No exhaust

Recirculated waste gates and Fast Intentions 3" Non resonated Exhaust

GaleForce · 07-03-2012, 10:16 PM

Thanks for the vids. The last one was the best. Recirc for me.

Boosted Performance · 07-03-2012, 11:56 PM

I would suggest re-circulate because as mentioned, loud will get old.

The donor car had test pipes, and the 2.5" dual F.I exhaust when it came in. When it left with the turbo kit on it was quieter than when N/A. I would say at idle it would be comparable to stock because the twin scroll does act like a big muffler.

At WOT it is just the right tone IMO, but we all have different tastes. I like the stock look and sound, because I favor the sleeper idea. On the other hand there is the complete opposite side of the spectrum where a customer wants it as loud as possible.

jofro6 · 07-04-2012, 10:23 AM

Is there any other benefit to recirc besides just sound? does it help with spool or anything by keeping the air? if that is even correct on how it works lol

Boosted Performance · 07-04-2012, 11:13 AM

Quote:

Originally Posted by jofro6

Is there any other benefit to recirc besides just sound? does it help with spool or anything by keeping the air? if that is even correct on how it works lol

Open dumps will help with performance a bit in theory since the extra exhaust gas does not need to go through to the tail pipe. Less exhaust downstream from turbo means less pressure/resistance.

SharpByCoop · 07-05-2012, 09:30 AM

The three vids aren't a great comparison, but they are indicative. The 'quietest' exhaust has the camera 24" from the taiilpipe! LOL!

I've found VERY little performance loss with recirculation. In doing so you aren't looking over your shoulder, or annoying everyone, each time you want to step beyond half throttle.

I even went with recirculating the BOV. Quiet and stealthy across the board. YMMV.

Let the acceleration and exhaust note announce your authority, not from a dump.

Good builds here. Carry on.

Coop

Ron · 07-05-2012, 09:40 AM

I dyno'd before and after recirculating the WGs. Lost 8hp at the very top. Not noticeable and a very fair trade off. Loud does get old.

wheee! · 07-05-2012, 11:11 AM

Having heard the BP on the dyno at WOT, I am very impressed with the even tone of the exhaust and also the overall volume/sound. Not at all 'boi-racr', more like controlled thunder... recircs are the key to a classy and powerful installation IMHO. James's car is a very stealthy turbo kit. Almost like it was a factory option....

Sysopz · 07-13-2012, 02:04 PM

Quote:

Originally Posted by Boosted Performance

With all you guys that are on the "list", how may are looking at reciculating the wastegates and how many would like open dump tubes?

Remember open dump tubes = very loud

Open dump tubes will also be cheaper.

recirc

Boost_lee · 07-13-2012, 03:42 PM

For an 8hp loss, I'd do the recirc.

07-03-2012, 07:04 PM	#736 (permalink)
McNeil370 Base Member Join Date: Apr 2011 Location: NB canada Posts: 33 Drives: 2010 370z 2010 gt500 Rep Power: 14	open all the way for me bring on the noise these cars need a little more sound, to quiet for me, and the car should still be quiet when driving out of boost. __________________ boost =

07-03-2012, 10:16 PM	#742 (permalink)
GaleForce A True Z Fanatic Join Date: Aug 2011 Location: Ontario, Canada Posts: 21,749 Drives: Varis Arising II Rep Power: 51865	Thanks for the vids. The last one was the best. Recirc for me. __________________ >>>GaleForce's Build<<< >>>FaceBook @3GsCustoms<<<>>>Instagram @GaleForce370z<<< Varis Kamikaze-Z

07-03-2012, 11:56 PM	#743 (permalink)
Boosted Performance The370Z.com Sponsor Join Date: Feb 2010 Location: Edmonton, AB Posts: 1,629 Drives: Z's Rep Power: 3382	I would suggest re-circulate because as mentioned, loud will get old. The donor car had test pipes, and the 2.5" dual F.I exhaust when it came in. When it left with the turbo kit on it was quieter than when N/A. I would say at idle it would be comparable to stock because the twin scroll does act like a big muffler. At WOT it is just the right tone IMO, but we all have different tastes. I like the stock look and sound, because I favor the sleeper idea. On the other hand there is the complete opposite side of the spectrum where a customer wants it as loud as possible. Nut_N_Much and WI_Hedgehog like this.

07-04-2012, 10:23 AM	#744 (permalink)
jofro6 Track Member Join Date: Mar 2012 Location: Long Island, NY Posts: 603 Drives: 2012 370Z Touring Rep Power: 14	Is there any other benefit to recirc besides just sound? does it help with spool or anything by keeping the air? if that is even correct on how it works lol __________________ 2012 Red 6Spd Touring/Nav.. FI CF NonRes CBE and Res TP #682 Fly1 RS1 CF Fenders

07-05-2012, 09:30 AM	#746 (permalink)
SharpByCoop Enthusiast Member Join Date: Sep 2010 Location: Connecticut Posts: 286 Drives: '08 G37S - Graphite Rep Power: 15	The three vids aren't a great comparison, but they are indicative. The 'quietest' exhaust has the camera 24" from the taiilpipe! LOL! I've found VERY little performance loss with recirculation. In doing so you aren't looking over your shoulder, or annoying everyone, each time you want to step beyond half throttle. I even went with recirculating the BOV. Quiet and stealthy across the board. YMMV. Let the acceleration and exhaust note announce your authority, not from a dump. Good builds here. Carry on. Coop __________________ Jim Cooper - (Retired: '08 Infiniti G37 Sport • TheShopCT built • 11.13 @ 123 mph (click for vid) • GTM Stage II Twin Turbo • 5-speed A/T Level Ten built • 591whp @17 lbs boost)

07-03-2012, 09:31 PM	#740 (permalink)
Cell A True Z Fanatic Join Date: Jan 2010 Location: Chicago Posts: 1,449 Drives: A Garbage Truck Rep Power: 21	I would probably get recirc...

07-05-2012, 09:40 AM	#747 (permalink)
Ron A True Z Fanatic Join Date: Oct 2010 Location: Houston, TX Posts: 3,009 Drives: TT '11 PW Nismo #113 Rep Power: 22	I dyno'd before and after recirculating the WGs. Lost 8hp at the very top. Not noticeable and a very fair trade off. Loud does get old. __________________ 2011 Twin Turbo PW nismo #113 - My Journal - My TT Build Thread [ GTM GTX Stg2 TT \|\| HKS EVC6 \|\| Custom CarPC \|\| F.I 3'' TDX CBE \|\| SB 6puck clutch/ZSpeed CSC \|\| BC BR Coilovers \|\| SPC camber arms \|\| Work VSS-X \|\| Custom Headlights \|\| PW:JDM CF Covers \|\| Seibon CF Engine Cover ]

07-05-2012, 11:11 AM	#748 (permalink)
wheee! A True Z Fanatic Join Date: Sep 2009 Location: Mod Capital of Canada Age: 57 Posts: 7,354 Drives: cars. lots of cars. Rep Power: 40182	Having heard the BP on the dyno at WOT, I am very impressed with the even tone of the exhaust and also the overall volume/sound. Not at all 'boi-racr', more like controlled thunder... recircs are the key to a classy and powerful installation IMHO. James's car is a very stealthy turbo kit. Almost like it was a factory option.... __________________ H&R / Stillen / Berk / HKS / Swift / Michelin / UpRev / SPC / Amuse Rep / Seibon / Fringe XVO / TWM / more... My Journal

07-13-2012, 03:42 PM	#750 (permalink)
Boost_lee A True Z Fanatic Join Date: Feb 2009 Location: SATX Posts: 2,813 Drives: 09 370Z TT 6MT Rep Power: 29	For an 8hp loss, I'd do the recirc. __________________ My TT Z

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