CPE full system and noise.

[mustangman]

I thought it would be a good idea to post this before hand and talk about a before and after effect.

I just bought a CPE intake and am getting the Downpipe w/cat and exhaust with extra resonator installed within the next few days. The CAI sounds amazing, as many of you know, but I tend to drive an older crowd around for work. (Sales Manager and I take Presidents of companies out for lunch, etc.) I can almost hear some customers ask, "Jim, what the hell is that noise". Now of course I will laugh and call then old... but I was thinking of a solution for this.

In talking with Jordan from CPE, he also thinks this will work great. A product called Dynashield from the company that makes Dynamat. I've called and researched pricing and its not expensive at all. ($20.00 for a spray on, $125 installed.) And I hope to get this done Friday or Saturday.

I'd love to hear your thoughts on how I can measure the noise before and after so that I can help anyone else with such a decision.

Lastly, CPE and Jordan specifically, what an amazing group of people. Jordan has taken quite a bit of his time and knowledge to help me through many idea's I have with the Speed6. Never once did I feel like I was bothering him and the encouragement I was given was great. I just wanted to say thank you for great products and great support.


Jim

 

[jdub260]

If you wanna meet me halfway I can "borrow" a Db tester from work on a day to day basis. It would be ~80 mile trip each way, and we would have to make the trip twice(once before and once after), but it could be worth it for measured results.

Or you could just buy one for ~$100.
http://www.soundlevelmeters.net/digital-sound-level-meters/q350.shtml

 

[Gandalf]

Radioshack sells the most widely used SPL meter available in both analog and digital versions. Go grab the digital one for about $50. Alot of audio people use them to tune their high priced HT systems, they work very well.

 

[mustangman]

Jdub260, thank you, that would be a great way to at least show the DB levels. I have one from my old racing days (Needs to measure DB for certain classes.) I'll double check that it stills works, and if not I'll go grab one from Radio Shack. (Thanks Gandalf). Either way, thank you for offering to drive and let me borrow it. I'll let you guys know soon. Also, anyone else that needs additional info, let me know and I'll do my best to make it happen.

Jim

 

[MUSOM]

I'll be one to tell you, I've had the CPE CAI, downpipe, and catback exhaust system with extra Kooks 14'' muffler for about 6 months. Performance is a 10/10. However, it is loud. You'll have a drone the majority of the time, and it can become very annoying with company in your ride. I would do anything to get rid of the resonating sound. So beware....it is loud.

 

[jdub260]

Jdub260, thank you, that would be a great way to at least show the DB levels. I have one from my old racing days (Needs to measure DB for certain classes.) I'll double check that it stills works, and if not I'll go grab one from Radio Shack. (Thanks Gandalf). Either way, thank you for offering to drive and let me borrow it. I'll let you guys know soon. Also, anyone else that needs additional info, let me know and I'll do my best to make it happen.

Jim

Not a problem mustangman, anything to help out the MS6 community.

Besides who doesn't love road trips. (drive2)

Radioshack sells the most widely used SPL meter available in both analog and digital versions. Go grab the digital one for about $50. Alot of audio people use them to tune their high priced HT systems, they work very well.

Good info Gandalf, I never thought to look there. (first)

 

[www.cp-e.com]

I thought it would be a good idea to post this before hand and talk about a before and after effect.

I just bought a CPE intake and am getting the Downpipe w/cat and exhaust with extra resonator installed within the next few days. The CAI sounds amazing, as many of you know, but I tend to drive an older crowd around for work. (Sales Manager and I take Presidents of companies out for lunch, etc.) I can almost hear some customers ask, "Jim, what the hell is that noise". Now of course I will laugh and call then old... but I was thinking of a solution for this.

In talking with Jordan from CPE, he also thinks this will work great. A product called Dynashield from the company that makes Dynamat. I've called and researched pricing and its not expensive at all. ($20.00 for a spray on, $125 installed.) And I hope to get this done Friday or Saturday.

I'd love to hear your thoughts on how I can measure the noise before and after so that I can help anyone else with such a decision.

Lastly, CPE and Jordan specifically, what an amazing group of people. Jordan has taken quite a bit of his time and knowledge to help me through many idea's I have with the Speed6. Never once did I feel like I was bothering him and the encouragement I was given was great. I just wanted to say thank you for great products and great support.


Jim

(drive)


Thanks so much for the compliments AND the feedback. Let me know how things go!


Jordan

 

[mustangman]

Ok, well I have the baseline numbers finally... I'm sorry this took so long, I've been out of town for a long time.

As I returned home, I stopped by and had the Catted DP and CPE exhaust put on as well. Nice power form both, but LOUD as hell. I spoke with Josh at CPE and he sold me a 12" oval muffler to try. I'll get the baselines for sound on the full system ASAP, but here is the baseline.

Stock with CPE CAI:

Cabin @ idle - 69 dbs
Cabin @ 40mph - 86 dbs
Cabin @ 70 mph - 96
CAI (measured outside the car) rev to 4k rpm - 92 dbs
Exhaust (Stock) @ idle - 79 dbs
Cabin rev to 4k RPM - 80 dbs

I plan to get baselines with DP and CPE Exhaust and post as well, then post for the 12" oval add on muffler, then finally get the Dynomat and see the change from the above readings.

Again, I apologize for the delay, I blame work... (bird)

Lastly, CPE, thank you for all your help. You guys are the best.

Jim

 

[www.cp-e.com]

Ok, well I have the baseline numbers finally... I'm sorry this took so long, I've been out of town for a long time.

As I returned home, I stopped by and had the Catted DP and CPE exhaust put on as well. Nice power form both, but LOUD as hell. I spoke with Josh at CPE and he sold me a 12" oval muffler to try. I'll get the baselines for sound on the full system ASAP, but here is the baseline.

Stock with CPE CAI:

Cabin @ idle - 69 dbs
Cabin @ 40mph - 86 dbs
Cabin @ 70 mph - 96
CAI (measured outside the car) rev to 4k rpm - 92 dbs
Exhaust (Stock) @ idle - 79 dbs
Cabin rev to 4k RPM - 80 dbs

I plan to get baselines with DP and CPE Exhaust and post as well, then post for the 12" oval add on muffler, then finally get the Dynomat and see the change from the above readings.

Again, I apologize for the delay, I blame work... (bird)

Lastly, CPE, thank you for all your help. You guys are the best.

Jim

Well we really appreciate you posting empirical data for one of our products, so thank you

Just so we're clear, would you mind listing which exhaust combination you're running? Was this with one muffler or two? Catted downpipe or offroad?

Thanks!


Jordan

 

[mustangman]

No problem Jordan, the system on the car right now is:

A Catted Downpipe with a CPE exhaust and (1) 14" resonator. It is the 3 piece system. (confirmed earlier)

Next tuesday, the 10th, I should be receiving a 12" Oval muffler from CPE. I plan to do a before and after for decibel levels. If this isn't "perfect" for me, I may add another 12" oval muffler, a "Y" to the 3" setup and put that muffler on the other side.

For anyone looking pure performance, it is an amazing difference from stock, as I said before CPE is quality all the way.

 

[LBV]

I would do anything to get rid of the resonating sound.

Try putting in a round resonator in the middle under the car ... something like part # 14616 on the Magnaflow website.

 

[MUSOM]

I agree completely. I am in the exact same situation, but my plan of action is slightly different. I have CPE CAI, Downpipe, and catback system with the extra 14'' muffler. I am talking the iniative to tweak my system, and will be working this week to try to fit a 24" flow through muffler onto my current setup. I'm not the best welder in the world, but I'm gonna see what I kind of damage I can do! (evil) If I'm not completely satisfied, my next step will be the spray on dynoshield. I'm very curious to hear results from mustangmans muffler addition and especially if he adds the dynoshield. I would even consider taking my system back to dual exhaust and add another muffler to the other side. Performance is killa though (breakn) Keep me posted on those db readings!!!!

No problem Jordan, the system on the car right now is:

A Catted Downpipe with a CPE exhaust and (1) 14" resonator. It is the 3 piece system. (confirmed earlier)

Next tuesday, the 10th, I should be receiving a 12" Oval muffler from CPE. I plan to do a before and after for decibel levels. If this isn't "perfect" for me, I may add another 12" oval muffler, a "Y" to the 3" setup and put that muffler on the other side.

For anyone looking pure performance, it is an amazing difference from stock, as I said before CPE is quality all the way.

 

[www.cp-e.com]

No problem Jordan, the system on the car right now is:

A Catted Downpipe with a CPE exhaust and (1) 14" resonator. It is the 3 piece system. (confirmed earlier)

Next tuesday, the 10th, I should be receiving a 12" Oval muffler from CPE. I plan to do a before and after for decibel levels. If this isn't "perfect" for me, I may add another 12" oval muffler, a "Y" to the 3" setup and put that muffler on the other side.

For anyone looking pure performance, it is an amazing difference from stock, as I said before CPE is quality all the way.

You're the man (headbang)

I agree completely. I am in the exact same situation, but my plan of action is slightly different. I have CPE CAI, Downpipe, and catback system with the extra 14'' muffler. I am talking the iniative to tweak my system, and will be working this week to try to fit a 24" flow through muffler onto my current setup. I'm not the best welder in the world, but I'm gonna see what I kind of damage I can do! (evil) If I'm not completely satisfied, my next step will be the spray on dynoshield. I'm very curious to hear results from mustangmans muffler addition and especially if he adds the dynoshield. I would even consider taking my system back to dual exhaust and add another muffler to the other side. Performance is killa though (breakn) Keep me posted on those db readings!!!!

This is great, we'll have two different guys trying some different muffler combinations (cabpatch)

I assume the visit to the welding place this morning was a success?


Jordan

 

[mustangman]

Try putting in a round resonator in the middle under the car ... something like part # 14616 on the Magnaflow website.

The only problem I see with this part is that it is a 2-1/2" and the CPE system is a 3". The exhaust flow would be restricted and performance would suffer a bit from this. Just my $0.02.

Jim

 

[MUSOM]

So, because of mustangman's authoratative altruism, I've decided to go to pick up a db meter at radioshack myself here in a few hours. It would be nice to do a little head-to-head comparison and see what db level I'm at currently and compare it to some mod. Just a little FYI, I should be posting results today or tomorrow.

 

[mustangman]

So, because of mustangman's authoratative altruism, I've decided to go to pick up a db meter at radioshack myself here in a few hours. It would be nice to do a little head-to-head comparison and see what db level I'm at currently and compare it to some mod. Just a little FYI, I should be posting results today or tomorrow.

Look at Musom using the $50 words. (rockon) If need be Musom, I can let you borrow mine, we aren't too far away from each other. Just let me know bud.

Jim

 

[MUSOM]

Bummer. I just got back from radioshack an hour ago. I tried it out on the way home, and it seems that I'm getting just about the same readings you are. It seems that I was averaging between 90-94 db in conservative driving and in the upper 90's with aggressive driving. I even had peaks at around 108 db at WOT. Idle seemed about the same as yours. I'll get out this evening and get some more accurate reading and maybe even a vid post. thanks for the offer.

Is this the same meter you have?

Look at Musom using the $50 words. (rockon) If need be Musom, I can let you borrow mine, we aren't too far away from each other. Just let me know bud.

Jim

 

[LBV]

The only problem I see with this part is that it is a 2-1/2" and the CPE system is a 3". The exhaust flow would be restricted and performance would suffer a bit from this. Just my $0.02.

Jim

You're right there, but they do have a 3" as well I believe.

 

[mustangman]

Bummer. I just got back from radioshack an hour ago. I tried it out on the way home, and it seems that I'm getting just about the same readings you are. It seems that I was averaging between 90-94 db in conservative driving and in the upper 90's with aggressive driving. I even had peaks at around 108 db at WOT. Idle seemed about the same as yours. I'll get out this evening and get some more accurate reading and maybe even a vid post. thanks for the offer.

Is this the same meter you have?

Yup, I have the same meter. I will do my tests with it ASAP, its snowing here and I'm trying to finish up work. I'll get em soon guys, hopefully today.

Jim

 

[mustangman]

Stock with CPE CAI:

Cabin @ idle - 69 dbs
Cabin @ 40mph - 86 dbs
Cabin @ 70 mph - 96
CAI (measured outside the car) rev to 4k rpm - 92 dbs
Exhaust (Stock) @ idle - 79 dbs
Cabin rev to 4k RPM - 80 dbs

Test Conditions:
All windows up, car at 600-700 rpm Idle, Mild to no wind.



CPE CAI - CPE Exhaust w/14" resonator - CPE DP w/Cat
Cabin @ Idle - 80
Cabin @ 40 MPH - 90
Cabin @ 70 MPH - 98
Outside Driver window - Rev to 4,000 RPM - 99
Exhaust @ Idle - 105
Cabin Rev to 4,000 RPM - 93
Cabin @ hard accel - 1-2 Gear - 105

I added a Hard accel line to show how loud it is, also note the cabin @ Idle and Exhaust @ Idle (measured from outside 6" from exhaust tip).

Jim