Exhaust with valve opening: which setting for track

Arnold · 06-19-2012, 10:05 AM

Hi,

I bought a second hand 370Z (less that 10K kms) in December and I'm hitting the track in beginning of July.
Just a (stupid) question: the previous owner fitted a NAP exhaust line with the remotely openable valves.

Is it any better to race with this open or closed or no difference at all, it's just the sound?
My guess: last option

Thanks!

cossie1600 · 06-19-2012, 11:29 AM

If your car/you is really fast, run open if you like. If you aren't fast, make your car STFU before you embarrass yourself. Just an opinion.

spearfish25 · 06-19-2012, 01:27 PM

Won't make any appreciable speed difference. Just a head turner.

threeseventy · 06-19-2012, 02:54 PM

Definitely open, it bypasses the restrictive muffler and adds power. New Cadillac CTS-V's come with it JUST in case you want to track your car.

Arnold · 06-19-2012, 03:46 PM

OK thank you all for your answers; I also thought I would drive with it closed to avoid unnecessary douchebag noise especially since I'm a beginner

Now @threeseventy makes me think of the opposite!

vividracing · 06-19-2012, 05:29 PM

Quote:

Originally Posted by Arnold

OK thank you all for your answers; I also thought I would drive with it closed to avoid unnecessary douchebag noise especially since I'm a beginner

Now @threeseventy makes me think of the opposite!

The noise level of your car is pretty much irrelevant on the track. Everyone expects there to be obnoxiously loud cars there

cossie1600 · 06-19-2012, 05:48 PM

except when you have a decked out 100db Miata that gets passed by a Prius at the track

martin82 · 06-19-2012, 08:57 PM

z06 opens the exhaust valves I believe after 4-5K rpm also, but keeps them shut when going slow/lower RPM. My buddy added the switch on his exhaust, he can open anytime he wants

threeseventy · 06-19-2012, 08:59 PM

Jealous of you.. get comfortable on the track, then open 'er up! BLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!!! !!!!!!!!!!!!!

06-19-2012, 10:05 AM	#1 (permalink)
Arnold Base Member Join Date: Dec 2011 Location: London Posts: 89 Drives: '10 370Z Sport M6 Rep Power: 13	Exhaust with valve opening: which setting for track Hi, I bought a second hand 370Z (less that 10K kms) in December and I'm hitting the track in beginning of July. Just a (stupid) question: the previous owner fitted a NAP exhaust line with the remotely openable valves. Is it any better to race with this open or closed or no difference at all, it's just the sound? My guess: last option Thanks!

06-19-2012, 01:27 PM	#3 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Won't make any appreciable speed difference. Just a head turner. __________________ 2013 Cadillac V-Wagon, RIP Z

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06-19-2012, 11:29 AM	#2 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	If your car/you is really fast, run open if you like. If you aren't fast, make your car STFU before you embarrass yourself. Just an opinion.

06-19-2012, 02:54 PM	#4 (permalink)
threeseventy Track Member Join Date: Mar 2011 Location: Huntington Beach, CA Posts: 598 Drives: Opinion Rep Power: 15	Definitely open, it bypasses the restrictive muffler and adds power. New Cadillac CTS-V's come with it JUST in case you want to track your car.

06-19-2012, 03:46 PM	#5 (permalink)
Arnold Base Member Join Date: Dec 2011 Location: London Posts: 89 Drives: '10 370Z Sport M6 Rep Power: 13	OK thank you all for your answers; I also thought I would drive with it closed to avoid unnecessary douchebag noise especially since I'm a beginner Now @threeseventy makes me think of the opposite!

06-19-2012, 05:48 PM	#7 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	except when you have a decked out 100db Miata that gets passed by a Prius at the track

06-19-2012, 08:57 PM	#8 (permalink)
martin82 A True Z Fanatic Join Date: Nov 2011 Location: los angeles Posts: 2,636 Drives: 12 Nissan 370Z MB M6 Rep Power: 19	z06 opens the exhaust valves I believe after 4-5K rpm also, but keeps them shut when going slow/lower RPM. My buddy added the switch on his exhaust, he can open anytime he wants

06-19-2012, 08:59 PM	#9 (permalink)
threeseventy Track Member Join Date: Mar 2011 Location: Huntington Beach, CA Posts: 598 Drives: Opinion Rep Power: 15	Jealous of you.. get comfortable on the track, then open 'er up! BLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!!! !!!!!!!!!!!!!