Sedan Chat Thread
01-04-2015, 11:01 PM
#5476
For any of my fellow physics nerds out there, this article is an interesting read on the science behind exhaust tone. Ever wondered why two V6's can sound so different? Well here's the explanation. 
This Is Why Various Engine Types Sound So Different ? Feature ? Car and Driver
This Is Why Various Engine Types Sound So Different ? Feature ? Car and Driver
01-04-2015, 11:48 PM
#5477
Had the same issue with just Berks and Tanabe axle back. It was a high pitched pinging raspy sound coming from the center... Embarrassing to say the least. So I bought a catback and upon installing I noticed some pebbles stuck between the center heat shield and the body. The noise is all be eliminated. Is it safe to remove heat shields above mufflers and mid pipe?
Connor, does it sound like a pinging noise by chance? I'm experiencing that but only when I'm really getting on it...probably 70% throttle. It sounds like ball bearings in the cats or something metal reverberating like a heat shield somewhere. Need to have that checked out.
On a side note, did anyone replace their rubber exhaust hangers when an aftermarket system was installed? When I installed my FI system, I reused the OEM rubber exhaust hangers. Wondering if those need to be switched to a stiffer, or newer hanger.
01-04-2015, 11:52 PM
#5478
Ah ok...yeah, I'm not sure what to think on that...but I don't really have anywhere like the stock getup has where pebbles could get stuck. 
At any rate, it's time to get it on the lift if nothing else to check all the bolts for tightness. AFAIK, there aren't any aftermarket rubber or polyurethane hangers for our car. I just reused the stock units.
At any rate, it's time to get it on the lift if nothing else to check all the bolts for tightness. AFAIK, there aren't any aftermarket rubber or polyurethane hangers for our car. I just reused the stock units.
01-05-2015, 12:06 AM
#5479
Ah ok...yeah, I'm not sure what to think on that...but I don't really have anywhere like the stock getup has where pebbles could get stuck. At any rate, it's time to get it on the lift if nothing else to check all the bolts for tightness. AFAIK, there aren't any aftermarket rubber or polyurethane hangers for our car. I just reused the stock units.
At any rate, it's time to get it on the lift if nothing else to check all the bolts for tightness. AFAIK, there aren't any aftermarket rubber or polyurethane hangers for our car. I just reused the stock units.
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twin_snails (01-05-2015)
01-06-2015, 06:37 AM
#5480
I changed my oil on Sunday. This would be the first post lowering oil change I've had to do. What a pain. Gone are the days of sliding the jack under the front cross-member and jacking the whole car up.
I started jacking up the drivers side and sliding a ramp under it, thinking maybe I would have enough room. Nope. So I did the passenger side too.
When I was done, I jacked it up a bit from the center point and lowered it onto 2x12s to drive off of. Easily added 1 beer, I mean, 30 minutes to the oil change process
I started jacking up the drivers side and sliding a ramp under it, thinking maybe I would have enough room. Nope. So I did the passenger side too.
When I was done, I jacked it up a bit from the center point and lowered it onto 2x12s to drive off of. Easily added 1 beer, I mean, 30 minutes to the oil change process
01-06-2015, 08:17 AM
#5481
Registered User
I changed my oil on Sunday. This would be the first post lowering oil change I've had to do. What a pain. Gone are the days of sliding the jack under the front cross-member and jacking the whole car up.
I started jacking up the drivers side and sliding a ramp under it, thinking maybe I would have enough room. Nope. So I did the passenger side too.
When I was done, I jacked it up a bit from the center point and lowered it onto 2x12s to drive off of. Easily added 1 beer, I mean, 30 minutes to the oil change process
I started jacking up the drivers side and sliding a ramp under it, thinking maybe I would have enough room. Nope. So I did the passenger side too.
When I was done, I jacked it up a bit from the center point and lowered it onto 2x12s to drive off of. Easily added 1 beer, I mean, 30 minutes to the oil change process
01-06-2015, 08:37 AM
#5482
Administrator
iTrader: (9)
After I lowered the car, the only way I can get the front end up on ramps is to first drive it up on a 6 foot length of 1x12 board. However, my rear tires are too wide for these ramps.
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twin_snails (01-07-2015)
01-06-2015, 08:37 AM
#5483
Registered User
Dust shields behind the calipers can make all kinds of weird resonant noises when compromised. Worth a look.
No. Most aftermarket exhausts for this car have 2.5" pipes. And the OEM exhaust on the Coupe is closer to 2.5" than 2.25", IIRC. The wider pipes should (hope) give a deeper tone, and likely a few extra HP when tuned; but it also introduces in-cabin drone... hence the resonated cats, and 18" resonators on the catback; (knock on wood).
It's all pretty subjective, G37Xtreme. And qualifying the topic as a binary choice between what is "correct" or not is over-thinking things. I mean, you're right about having a large diameter exhaust with a custom FI setup. But in the context of bolt-on mods for a NA car, the difference between 2.25" and 2.5" doesn't really matter.
No. Most aftermarket exhausts for this car have 2.5" pipes. And the OEM exhaust on the Coupe is closer to 2.5" than 2.25", IIRC. The wider pipes should (hope) give a deeper tone, and likely a few extra HP when tuned; but it also introduces in-cabin drone... hence the resonated cats, and 18" resonators on the catback; (knock on wood).
It's all pretty subjective, G37Xtreme. And qualifying the topic as a binary choice between what is "correct" or not is over-thinking things. I mean, you're right about having a large diameter exhaust with a custom FI setup. But in the context of bolt-on mods for a NA car, the difference between 2.25" and 2.5" doesn't really matter.
2.25" stainless steel tubing to keep the interior noise resonance to a minimum. 2.5" option is available at an additional charge. (Recommended ONLY for cars with forced induction.
01-06-2015, 08:42 AM
#5484
Registered User
I try to never pay retail anymore for anything that qualifies for their coupon codes.
EDIT:
How long did it take to get the Vossen name and logo right side up for the photoshoot?
01-06-2015, 08:44 AM
#5485
Way back when, I watched my dad pull the family 1987 Oldsmobile Calais up onto ramps. Front wheel spun. Ramps shot out. Oldsmobile went through the back of the garage. Ive always been leery of ramps since then
01-06-2015, 08:54 AM
#5486
Administrator
iTrader: (9)
Total coincidence. However, if I had thought of it at the time, I probably would have tried to line up the logo and happily owned up to it. But no, that was just a photo of opportunity last time I ran the car up on ramps.
I really would like a better set of ramps. Someday, I'm sure.
http://www.raceramps.com/car-service-ramps.aspx
The least-expensive, two-piece model is their 56" length, at $240. Wait, actually, that's not that crazy. I think these just went on my list.
http://www.raceramps.com/2-piece-56-...ice-ramps.aspx
Last edited by Rochester; 01-06-2015 at 10:37 AM.
01-06-2015, 10:24 AM
#5488
Administrator
iTrader: (9)
Given your auto history, wide high-end ramps were more of a requirement than a luxury.
01-06-2015, 11:09 AM
#5489
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Wow..what a popular thread.
I know you all are G37 sedan users, but if anyone has knowledge of the G37 Coupe & battery issues..please leave some input @ https://www.myg37.com/forums/g37-cou...-problems.html
I just posted and would really appreciate any feedback..because I have no idea what I'm supposed to do.
thannks
I know you all are G37 sedan users, but if anyone has knowledge of the G37 Coupe & battery issues..please leave some input @ https://www.myg37.com/forums/g37-cou...-problems.html
I just posted and would really appreciate any feedback..because I have no idea what I'm supposed to do.
thannks
