Why does the exhaust growl more aggressively for the first few minutes after starting

Bottomsup · 12-15-2013, 12:06 PM

I like it just curious though

waaaasabi · 12-15-2013, 12:26 PM

Quote:

Originally Posted by Bottomsup

I like it just curious though

The car warms up, so the engine idles at a higher RPM.

Z-Girl 12 · 12-15-2013, 02:19 PM

i loooovvveeee that sound...FI made it even more enjoyable. sounds sooooo rumbly and agressive!

/Angelo350Z/ · 12-22-2013, 08:26 PM

Quote:

Originally Posted by Z-Girl 12

i loooovvveeee that sound...FI made it even more enjoyable. sounds sooooo rumbly and agressive!

The FI makes my garage door rattle and it's annoying as f***. It literally sounds like someone's doing construction in my garage.

BGTV8 · 12-15-2013, 02:23 PM

Combination of slightly higher rev's and over-rich mixture whilst the engine warms-up and the catalytic converters "flashing-up" - cats don;t work until they get to ~6-800DegC and that takes a couple of minutes

nmjaxx9 · 12-15-2013, 03:02 PM

My boi got a single exit gotttttt dammm when he starts whooooooo. He had a tune before and it was whippin faces. He told me after he got more hp he rearranged a old mans face the other day

osirus · 12-15-2013, 10:21 PM

Quote:

Originally Posted by nmjaxx9

My boi got a single exit gotttttt dammm when he starts whooooooo. He had a tune before and it was whippin faces. He told me after he got more hp he rearranged a old mans face the other day

Wait...What?!?!?

Elan · 12-16-2013, 04:24 AM

Quote:

Originally Posted by nmjaxx9

My boi got a single exit gotttttt dammm when he starts whooooooo. He had a tune before and it was whippin faces. He told me after he got more hp he rearranged a old mans face the other day

Let me translate:

"My good friend had a single tip exhaust system installed. Gosh darn when he engages the ignition, it makes me go wow. He had the engine tuned up and it was faster than other peoples cars. He told me that after the tune allowed his car to produce more horsepower, he was able to claim victory in a race with an elderly gentleman the previous day".

Either that or after the tune, he mauled an old man.

jaybulls · 12-20-2013, 06:41 PM

Quote:

Originally Posted by Elan

Let me translate:

"My good friend had a single tip exhaust system installed. Gosh darn when he engages the ignition, it makes me go wow. He had the engine tuned up and it was faster than other peoples cars. He told me that after the tune allowed his car to produce more horsepower, he was able to claim victory in a race with an elderly gentleman the previous day".

Either that or after the tune, he mauled an old man.

...and to think you had trouble w/my chit...

Elan · 12-21-2013, 01:24 AM

Quote:

Originally Posted by jaybulls

...and to think you had trouble w/my chit...

Que?

onzedge · 12-16-2013, 08:56 AM

Quote:

Originally Posted by nmjaxx9

My boi got a single exit gotttttt dammm when he starts whooooooo. He had a tune before and it was whippin faces. He told me after he got more hp he rearranged a old mans face the other day

That makes perfect sense.

Chuck33079 · 12-16-2013, 09:12 AM

Quote:

Originally Posted by onzedge

That makes perfect sense.

At least he's consistant.

onzedge · 12-16-2013, 09:12 AM

Quote:

Originally Posted by Chuck33079

At least he's consistant.

plato · 12-20-2013, 04:04 PM

Quote:

Originally Posted by nmjaxx9

My boi got a single exit gotttttt dammm when he starts whooooooo. He had a tune before and it was whippin faces. He told me after he got more hp he rearranged a old mans face the other day

LoL
WTF

OldFart · 12-15-2013, 03:23 PM

Mine sounds like a massive exhaust leak and loud when started. I thought it might be the flex piping in the exhaust. As the exhaust gets heated up the flex piping expands sealing itself up.

12-15-2013, 12:06 PM	#1 (permalink)
Bottomsup Base Member Join Date: Sep 2013 Location: SoCal Posts: 28 Drives: 2013 370z Rep Power: 12	Why does the exhaust growl more aggressively for the first few minutes after starting I like it just curious though __________________

12-15-2013, 02:19 PM	#3 (permalink)
Z-Girl 12 A True Z Fanatic Join Date: Apr 2012 Location: Florida Posts: 4,105 Drives: Spirited Rep Power: 11717	i loooovvveeee that sound...FI made it even more enjoyable. sounds sooooo rumbly and agressive! TerribleONE, OMGWTFBBQ, jaedub and 1 others like this. __________________ 2012 Z-SOLD 2014 Nismo #565 Fast Intentions CBE/HFC/Swift/SPC/RJM/H&R-15/20mm/Z1 CAI/Headers/Intake Manifold w/Uprev Tune 328.31whp/263.64tq

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12-15-2013, 02:23 PM	#5 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,515 Drives: 09 Nissan 370Z M6 Rep Power: 39974	Combination of slightly higher rev's and over-rich mixture whilst the engine warms-up and the catalytic converters "flashing-up" - cats don;t work until they get to ~6-800DegC and that takes a couple of minutes

12-15-2013, 03:02 PM	#6 (permalink)
nmjaxx9 A True Z Fanatic Join Date: Jul 2011 Location: Middletown, Ct Posts: 5,853 Drives: 2011 Nissan 370z Rep Power: 26	My boi got a single exit gotttttt dammm when he starts whooooooo. He had a tune before and it was whippin faces. He told me after he got more hp he rearranged a old mans face the other day

12-15-2013, 03:23 PM	#15 (permalink)
OldFart Track Member Join Date: May 2013 Location: Carlisle, PA Age: 62 Posts: 682 Drives: 2011 Wannabe Nismo Rep Power: 960	Mine sounds like a massive exhaust leak and loud when started. I thought it might be the flex piping in the exhaust. As the exhaust gets heated up the flex piping expands sealing itself up.