Tips for lowering dB? (Tomei expreme Ti)

JARblue · 11-15-2017, 09:05 AM

Quote:

Originally Posted by Laomatik

Does anyone know of any cheap decibel meters I can use to test?

Free iphone app? Or search Amazon.

gomer_110 · 11-15-2017, 09:22 AM

Quote:

Originally Posted by Laomatik

Something like this?

https://www.amazon.com/Duct-Elbow-De.../dp/B00BLUA5Z8

I think that could actually work. I just hope it's enough. Does anyone know of any cheap decibel meters I can use to test?

Bingo.

Here's a link to a picture of a 350z using one

Laomatik · 11-21-2017, 08:44 AM

Any thoughts on resonated test pipes being quieter than a non-resonated one? Or is that just to help with rasp?

Brendan · 11-22-2017, 09:14 AM

Quote:

Originally Posted by Laomatik

Any thoughts on resonated test pipes being quieter than a non-resonated one? Or is that just to help with rasp?

My experience is that they change the tone but don't get much quieter.

Laomatik · 11-22-2017, 11:21 AM

Quote:

Originally Posted by Brendan

My experience is that they change the tone but don't get much quieter.

Thanks for the info. I guess I will save money on resonated tp's then.

SS_Firehawk · 11-29-2017, 03:21 PM

I notice a difference in DB with my Z1 headers and F.I. RTP's compared to F.I.'s headers to F.I. exhaust if that helps. Both exhausts are F.I. 12" carbon fiber.

Read T · 11-29-2017, 09:05 PM

Always thought "Laguna Seca" mufflers were funny

https://www.google.com/search?q=lagu...=1966&bih=1012

Rusty · 11-29-2017, 09:14 PM

Quote:

Originally Posted by Read T

Always thought "Laguna Seca" mufflers were funny

https://www.google.com/search?q=lagu...=1966&bih=1012

Heard of some stock exhaust cars getting black flagged there.

Laomatik · 11-30-2017, 07:54 PM

Quote:

Originally Posted by Rusty

Heard of some stock exhaust cars getting black flagged there.

You could probably fart and get black flagged there lol

Hotrodz · 11-30-2017, 08:05 PM

Quote:

Originally Posted by Rusty

Heard of some stock exhaust cars getting black flagged there.

I actually got black flagged and kicked off the track for exceeding db level. Under power I was well beneath the limit but when I would up shift the car backfires under load and it sent the decibel meter through the roof...121 lol!

cigarclifford · 11-30-2017, 08:40 PM

Quote:

Originally Posted by Hotrodz

I actually got black flagged and kicked off the track for exceeding db level. Under power I was well beneath the limit but when I would up shift the car backfires under load and it sent the decibel meter through the roof...121 lol!

Outstanding report Mr. Bob

Laomatik · 11-30-2017, 07:54 PM

Quote:

Originally Posted by Read T

Always thought "Laguna Seca" mufflers were funny

https://www.google.com/search?q=lagu...=1966&bih=1012

I actually got some ideas from that link... thanks!!!

Laomatik · 11-30-2017, 07:55 PM

Quote:

Originally Posted by SS_Firehawk

I notice a difference in DB with my Z1 headers and F.I. RTP's compared to F.I.'s headers to F.I. exhaust if that helps. Both exhausts are F.I. 12" carbon fiber.

Hmm... I was considering some resonated tp’s but I wasn’t sure if it would make a noticeable difference.

Laomatik · 12-06-2017, 11:07 AM

Not sure if this would need a new thread or not, but I'll add it here. The silencer I got for my exhaust says to never drive the car hard with it installed. What kind of issues will excessive back pressure cause? I would expect less power and higher temps due to trapped heat, but is there a possibility of catastrophic failure from running too much back pressure?

DeliriousClam · 12-06-2017, 01:45 PM

Quote:

Originally Posted by Laomatik

Not sure if this would need a new thread or not, but I'll add it here. The silencer I got for my exhaust says to never drive the car hard with it installed. What kind of issues will excessive back pressure cause? I would expect less power and higher temps due to trapped heat, but is there a possibility of catastrophic failure from running too much back pressure?

The silencer popping out is the only thing I can think of

11-29-2017, 03:21 PM	#6 (permalink)
SS_Firehawk A True Z Fanatic Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7336	I notice a difference in DB with my Z1 headers and F.I. RTP's compared to F.I.'s headers to F.I. exhaust if that helps. Both exhausts are F.I. 12" carbon fiber. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

11-29-2017, 09:05 PM	#7 (permalink)
Read T A True Z Fanatic Join Date: May 2012 Location: Raleigh, NC Posts: 1,046 Drives: 11 Nissan 370z BC 6M Rep Power: 20	Always thought "Laguna Seca" mufflers were funny https://www.google.com/search?q=lagu...=1966&bih=1012 __________________ 2011 Nissan 370z Black Cherry Sport Pkg - Daily Driver, , 1960 Morgan +4 fun car, 1986 BMW 325ES, 1998 M3 and 1996 Spec Miata - Race Cars SUPPORT TEAM WINSOME RACING - WRL, CHUMP, LEMONS

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11-21-2017, 08:44 AM	#3 (permalink)
Laomatik Base Member Join Date: Dec 2015 Location: Smyrna, TN Posts: 115 Drives: 12 Nissan 370Z MB M6 Rep Power: 11	Any thoughts on resonated test pipes being quieter than a non-resonated one? Or is that just to help with rasp?

12-06-2017, 11:07 AM	#14 (permalink)
Laomatik Base Member Join Date: Dec 2015 Location: Smyrna, TN Posts: 115 Drives: 12 Nissan 370Z MB M6 Rep Power: 11	Not sure if this would need a new thread or not, but I'll add it here. The silencer I got for my exhaust says to never drive the car hard with it installed. What kind of issues will excessive back pressure cause? I would expect less power and higher temps due to trapped heat, but is there a possibility of catastrophic failure from running too much back pressure?