Dyno Day Results - 3.8RS - 4.0RS both stock and RPW Exhaust
10-21-2012, 01:26 AM
#17
Rennlist Member
Unfortunately we haver oven weight and HP disadvantage.
You have no choice if you want to be platinum cup
The car sound so nice on the way home..
Loud, but no drone. I consider OEM undrivable. M&M sounds nice less or no drone, even less than in 3.8 more power, pretty good value for the money.
Kinda weird that Porsche does not deliver the car like this OEM.
10-21-2012, 02:45 AM
#18
10-21-2012, 02:55 AM
#19
Burning Brakes
If Sharky has better sounds, that's good for me. Loved it on my 7.2 GT3 and decided to go this route again. I'll give Eddie a call when (or if) I get closer to DE Cup average times.
Rad, how much time will I gain at Sebring with the hp increase of MM?
Rad, how much time will I gain at Sebring with the hp increase of MM?
10-21-2012, 02:58 AM
#20
Banned
Thread Starter
I honestly like the sharky sound, but it becomes not deep and dark enough at some point.
I'm suspicious as I don't like drone, but I can live with my car without cats, as the sound is just intoxicating !
I'm suspicious as I don't like drone, but I can live with my car without cats, as the sound is just intoxicating !
10-21-2012, 03:08 AM
#22
Banned
Thread Starter
Just want to clarify that I wasn't doubting the results. I think it was a good test (with great results)! Was just curious about which part is providing the gain. Seems like there's 2 "portion" of the exhausts that are being changed out. The side mufflers and the center muffler.
Stock setup, obviously, most restrictive, with both side muffler and center muffler.
It looks like your base line is OEM side mufflers + center bypass.
Then you put in the setup that delete the side mufflers and add back a MM center muffler.
So I was just curious what would happen if you do the other combinations and if you guys have considered those, that's all.. (side muffler delete + OEM center muffler, side muffler delete + center bypass (I guess this would be basically open pipe, like the Sharky "Track" setup))
Stock setup, obviously, most restrictive, with both side muffler and center muffler.
It looks like your base line is OEM side mufflers + center bypass.
Then you put in the setup that delete the side mufflers and add back a MM center muffler.
So I was just curious what would happen if you do the other combinations and if you guys have considered those, that's all.. (side muffler delete + OEM center muffler, side muffler delete + center bypass (I guess this would be basically open pipe, like the Sharky "Track" setup))
Sharky and stock are basically the same, no loss no gain.
Actually the complete exhaust is being changed, just headers and cats are left alone on the 3.8 and Peter's 4.0
My own car that I also listed have complete system. Full catless headers and exhaust with side muffler delete.
The gains are significant enough to me.
My RPW system that is made by m&m is a system. It's a exhaust that was build to work without the side mufflers.
I have just the link pipes that are for people just looking to drop weight and heat, for little money, but are not looking for more power.
I personally never tested that set up and not interested, as in my car it will be extremely loud for a street car. Specially running no cats like I do.
10-21-2012, 09:05 AM
#23
Race Director
Great report Eddie! I wish I could have gotten my wanna be aero beetle up on this dyno. You know of any dyno's around that would work for me?
I'm curious if my M&M exhaust is helping or hurting because it merges the flow with an x-pipe in the rear and I've heard pro and con debates on this...depends on the manufacture.
I'm curious if my M&M exhaust is helping or hurting because it merges the flow with an x-pipe in the rear and I've heard pro and con debates on this...depends on the manufacture.
10-21-2012, 10:34 AM
#24
Burning Brakes
Great report Eddie! I wish I could have gotten my wanna be aero beetle up on this dyno. You know of any dyno's around that would work for me?
I'm curious if my M&M exhaust is helping or hurting because it merges the flow with an x-pipe in the rear and I've heard pro and con debates on this...depends on the manufacture.
I'm curious if my M&M exhaust is helping or hurting because it merges the flow with an x-pipe in the rear and I've heard pro and con debates on this...depends on the manufacture.
10-21-2012, 11:09 AM
#25
Rennlist Member
Just do what I did on my 6GT3 when my cats melted. I went with a used GT3RS header/cat, steel RS center muffler, and center exit cup bumper. Car sounds much better and not to loud, 95db at Roebling at 50' under full throttle in 4th gear. Now for thd good part since tha change from stock I am 4mph faster into turn 17 at Sebring 142mph on TrakMate. I have not dynod the car yet to see what it actually makes but it sure pulls harder. Loosing the heavy side cans didn't hurt either.
10-21-2012, 12:49 PM
#26
Former Vendor
Always glad to entertain some of the fastest Porsches and Drivers in South Florida and some of the nicest people.. Glad to see the products worked beyond what you expected!!! See you guys Nov. 4th @ Sebring!!!
Mike
Mike
10-21-2012, 12:55 PM
#28
Former Vendor
Great report Eddie! I wish I could have gotten my wanna be aero beetle up on this dyno. You know of any dyno's around that would work for me?
I'm curious if my M&M exhaust is helping or hurting because it merges the flow with an x-pipe in the rear and I've heard pro and con debates on this...depends on the manufacture.
I'm curious if my M&M exhaust is helping or hurting because it merges the flow with an x-pipe in the rear and I've heard pro and con debates on this...depends on the manufacture.
Long time no talk hope all is well..
10-21-2012, 01:01 PM
#29
Former Vendor
10-21-2012, 01:05 PM
#30
Rennlist Member
Mike thanks for hosting. I hope we did not leave too many empty beer bottles laying around 
Sound:
Erik drove the Stephen's 3.8RS to AWD with MM and back with Sharky (Hour each way a lot of time stuck in traffic jams and traffic lights). He can probably describe the difference better. Erik?
I think sound quality is similar, like Eduardo says the MM is a bit darker and both get louder up top where you'd say it is pretty loud for a street car. I would say just as loud in dB.
Maybe the Sharky noise is more like trumpet if that makes any sense, to me it sounds great and you have to option to go through the side muffler with the push of a button and it quiets down a lot.
I'll try to go drive both today, you know for evaluation... ;-)
I can't stand the artificial loud / quiet of the sport button so when I had the Sharky I unplugged the side mufflers permamently and at that point why not take the weight reduction and as we just found out HP?
Sound:
Erik drove the Stephen's 3.8RS to AWD with MM and back with Sharky (Hour each way a lot of time stuck in traffic jams and traffic lights). He can probably describe the difference better. Erik?
I think sound quality is similar, like Eduardo says the MM is a bit darker and both get louder up top where you'd say it is pretty loud for a street car. I would say just as loud in dB.
Maybe the Sharky noise is more like trumpet if that makes any sense, to me it sounds great and you have to option to go through the side muffler with the push of a button and it quiets down a lot.
I'll try to go drive both today, you know for evaluation... ;-)
I can't stand the artificial loud / quiet of the sport button so when I had the Sharky I unplugged the side mufflers permamently and at that point why not take the weight reduction and as we just found out HP?