Check my exhaust upgrade order please

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Check my exhaust upgrade order please

Postby Curves » Wed May 22, 2013 12:41 pm

Life is too short. I have decided on MAX performance for my 2012 PRHT. I have 5 smog free years to enjoy by which time I will probably have another car or just convert this to a dedicated AX/Track car.

Are these the correct items?
Rocky will be doing the install then I will get it tuned.

http://www.good-win-racing.com/Mazda-Pe ... -1078.html
http://www.good-win-racing.com/Mazda-Pe ... 078-B.html
http://www.good-win-racing.com/Mazda-Pe ... 098RD.html
http://www.good-win-racing.com/Mazda-Pe ... -1337.html

Can a tune bypass the need for any of the O2 Sensors?
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Re: Check my exhaust upgrade order please

Postby Brian » Wed May 22, 2013 1:11 pm

Yes, list looks complete.
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Re: Check my exhaust upgrade order please

Postby Chris Thompson » Thu May 23, 2013 2:16 pm

You forgot the baffles, Robert! You WILL want them. It grates on my nerves just driving from my house to Qualcomm without them.

You have to ask Mike at Moto-East about deleting an 02 sensor. I don't know what advantage there would be but let us know what Mike has to say about that.
'99 Base Sport with bolt-on hardtop and '08 PRHT GT. I love them both. SCCA, PCA, BMW San Diego region #105
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Re: Check my exhaust upgrade order please

Postby Brian » Thu May 23, 2013 10:33 pm

The actual numbers on customers with full headers from us even buying the packed baffles is only 17%. And plenty of those buyers get them up front and later tell me they have never felt the need to use them and they are just sitting on a shelf in their garage gathering dust. I recently drove our 2006 Project car with full RoadsterSport Max Power Header, RoadsterSport Midpipe, and RoadsterSport Q exhaust all the way to Laguna Seca (437 miles each way), and several hundred miles on the track, and the thought of wanting the packed baffles never even occurred to me over that several days. I am happy we have the option because there are certainly a minority of users like Chris who really appreciate and use the optional packed baffles on a regular basis, but I usually suggest to most folks they start without the optional packed baffles because the numbers suggest that most never feel the need for them.
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Re: Check my exhaust upgrade order please

Postby Chris Thompson » Fri May 24, 2013 7:28 am

Brian wrote:I am happy we have the option because there are certainly a minority of users like Chris who really appreciate and use the optional packed baffles on a regular basis,....

I certainly do appreciate them! Easy to install and remove in about 2 minutes including the walk to and from my toolbox. Perhaps I'm just getting old and like my daily driver quiet and I'm certainly... uh...different than most people :mrgreen:

I get complements on how nice the car sounds at autocrosses with the baffles out too.
'99 Base Sport with bolt-on hardtop and '08 PRHT GT. I love them both. SCCA, PCA, BMW San Diego region #105
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Re: Check my exhaust upgrade order please

Postby roadster_nh » Fri May 24, 2013 8:17 am

Brian wrote:The actual numbers on customers with full headers from us even buying the packed baffles is only 17%. And plenty of those buyers get them up front and later tell me they have never felt the need to use them and they are just sitting on a shelf in their garage gathering dust.


I'm one of the 17% whose baffles are gathing dust. It's a great option and I can see how some people would really like or need them. I bought mine soon after the install when the system hadn't settled in with carbon buildup... however it didn't take long for the sound to mellow and smooth out to a point where I don't even think about installing the baffles (or maybe it has nothing to do with carbon and my ears just got used to it).
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Re: Check my exhaust upgrade order please

Postby Chris Thompson » Fri May 24, 2013 9:02 am

Perhaps the RoadsterSport mid-pipe is actually quieter than the PPE LTH mid-pipe? They are not the same cat and resonator, Brian? Maybe that's something that would make my power hardtop car a bit louder inside the cabin at certain frequencies?
'99 Base Sport with bolt-on hardtop and '08 PRHT GT. I love them both. SCCA, PCA, BMW San Diego region #105
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Re: Check my exhaust upgrade order please

Postby Brian » Fri May 24, 2013 9:07 am

I have not had opportunity myself to compare the sound of PPE and Roadstersport complete systems on same day with same muffler, same humidity, etc. But certainly I have experienced that the tin top is an echo chamber for exhausts in comparison to the soft top, or at least that the insulation in the PRHT seems to effectively cut the wind noise ...and thereby makes the exhaust sound coming from below more dominant and obvious.
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Re: Check my exhaust upgrade order please

Postby Va MX5 » Fri May 24, 2013 11:25 am

Folks,

I have the same header and exhaust setup ( without the optional baffles ) on my 2012 PRHT, as Brian has on his 2006 project car. Chris always has something positive and / or informative in his posts, so I respect his opinion. Sound is very subjective to each individual and the stock exhaust note is very pleasant for just cruising. I like to track my car in HPDE events often, with my current exhaust setup I can hear the car at speed when surrounded by fully race prepped track cars ( before I couldn't ). Off the track, it is a good compromise for me, even with the top up, so I am happy. Also, I will tell you fitment was great and I have never experienced any OBD trouble codes to date, good product. I have no experience with the PPE header or mid-pipe, but if you have concerns about loudness / sound, don't rush the purchase, find someone at one of the track events ( even if you don't track your car, they are fun to watch ), whose car is equipped similar to what you are thinking of, to see if you like the package , including the sound. Then make up your own mind of what will work for you.

Regards to all.
Pat- Va MX5
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Re: Check my exhaust upgrade order please

Postby Curves » Sat May 25, 2013 6:30 am

I ended up buying both extension cables after emailing Mike. Here was is response:

"You do need the cables and the sensors. The front one is required for the ECU to fuel, the rear one is for emissions. While we can disable some ECU codes, it is better to have the sensor in there and in the circuit. Otherwise you get a slew of codes and not just one inefficiency code, and there it becomes a bit more complicated. Otherwise we’ve done many of these, and like even a stock car, they pickup HP and perform better when tuned."

Brian and Rocky are next door to each other. It sure is nice to have a one stop shop for advice, parts and installation.

Rocky is installing on Wednesday!
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Re: Check my exhaust upgrade order please

Postby JT12 » Sat May 25, 2013 7:07 am

I'm part of the 17% with the packed baffles and am glad I have them, but I would say they should be a wait and see item. The good thing is that Brian's shipping is so prompt that you don't have to try to guess what your experience will be way ahead of time. Before installing my header/mid/Q it was valuable to me just to be able to tell my wife that a way to adjust the sound existed. The sound isn't bad without them but sometimes talking in the car took a little more effort. The packed baffles cut it back just enough to make that easier for trips and still preserved the great character of the exhaust sound. Perfect -- for me. I don't have the PPE either, but test it out first. Then if needed, for not that much more $$, having options is good.
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Re: Check my exhaust upgrade order please

Postby Chris Thompson » Mon Jun 03, 2013 9:16 am

Chris Thompson wrote:Perhaps the RoadsterSport mid-pipe is actually quieter than the PPE LTH mid-pipe?

This weekend at autocross we sound tested Brian's blue car with his Max Power header and mid-pipe against my car with PPE header and mid-pipe. Same run time, same course, same Q mufflers. No real difference in decibel levels. Both cars blew average of 82db according to the SCCA sound person.

As an added bonus Andi (Brian's lovely wife) suggested I try barbecuing my avocados and peaches. For some reason I had never thought of that. Can't wait to try it with a tri-tip this week :)
'99 Base Sport with bolt-on hardtop and '08 PRHT GT. I love them both. SCCA, PCA, BMW San Diego region #105
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Re: Check my exhaust upgrade order please

Postby Brian » Mon Jun 03, 2013 9:33 am

That was a fun day Saturday, I was really surprised that both cars blew the same numbers.
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Re: Check my exhaust upgrade order please

Postby Vinzz » Wed Jun 05, 2013 7:56 am

This is an interesting post.

So if I understand correctly, a complete RoadsterSport exhaust line is similar to a complete MaxPower exhaust line, both in tems of performance and sound level ?
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Re: Check my exhaust upgrade order please

Postby Brian » Wed Jun 05, 2013 8:21 am

It was a comparison of sound level between PPE Long Tube header (with the midpipe that is included in that system), and RoadsterSport Max Power header and RoadsterSport Midpipe. Both systems finished with RoadsterSport Q muffler, and amazingly there was no difference in sound level.
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