Brettus turbo 11
#502
57 trim
due to the current revelation where does that put the 57 trim upgrade at? What would you say is its true potential with a full 3" exhaust outside of a final dyno Brett?
#504
To get the 60-1 (or the 57 for that matter) to perform you need to do what I have done with the wastegate . This is the main reason my setup makes so much more power than anyone elses . I have explained how to do this on numerous occasions but don't recommend it unless you have an engine built for boost.
As for what is the potential - 350whp with the 60-1 and an optimised greddy kit is totally doable .
#509
SARX Legend
iTrader: (46)
The AP is not a true 3" from what I recall. My Turbo XS is but then I have the BHR midpipe so the resonator has to restrict it a bit I would think. I'm not sure any of it makes a difference though. I have been thinking of slapping the Turbo XS midpipe on and see if there is a difference in the butt dyno.
#512
SARX Legend
iTrader: (46)
Hmm, I guess I was thinking of a different one. Do they only make one version? I have installed at least 10 different RX8 exhaust systems and I could have sworn the AP I installed last as like 2.5" or something. But obviously the pic you posted is 3" so maybe I am thinking of an Ebay one or the megan. I do know tbk here locally had the AP and the tips looked like **** after a month since they are just thin sheet metal tips.
#514
No respecter of malarkey
iTrader: (25)
of course you would, but it's not
neither is BHR
they neck down to the OE donut size in the rear and also for the exhaust manifold/header connection in the front
not only that, but at the rear they don't even neck it down properly with a reducer, they just run the 3" pipe into a flange with the smaller hole and donut pipe size on the discharge side, which is the worst possible flow connection. It acts as a restricting orifice that way. You can just cut that off and replace it as per my earlier post
.
neither is BHR
they neck down to the OE donut size in the rear and also for the exhaust manifold/header connection in the front
not only that, but at the rear they don't even neck it down properly with a reducer, they just run the 3" pipe into a flange with the smaller hole and donut pipe size on the discharge side, which is the worst possible flow connection. It acts as a restricting orifice that way. You can just cut that off and replace it as per my earlier post
.
Last edited by TeamRX8; 07-01-2013 at 09:15 PM.
#516
I disagree teamrx8,
I made a custom 3" downpipe that connected to this 3" flange however that ID might be 2.5. in that case you may be right, but your part would fix that, I wanted to keep that OEM bit so I could go back to OEM stuff.
![](http://www.mazdatrix.com/8pics/8exhaust/rx8-flange.jpg)
then looking at a comparison of a stock cat vs an ap midpipe. it seems the OEM donut is 3" despite being 2.5 inch pipe
![](http://www.mazdarx8.org/wp-content/uploads/2012/12/IMG_0999-1024x764.jpg)
so I say its really close to a true 3" exhaust.
I made a custom 3" downpipe that connected to this 3" flange however that ID might be 2.5. in that case you may be right, but your part would fix that, I wanted to keep that OEM bit so I could go back to OEM stuff.
![](http://www.mazdatrix.com/8pics/8exhaust/rx8-flange.jpg)
then looking at a comparison of a stock cat vs an ap midpipe. it seems the OEM donut is 3" despite being 2.5 inch pipe
![](http://www.mazdarx8.org/wp-content/uploads/2012/12/IMG_0999-1024x764.jpg)
so I say its really close to a true 3" exhaust.
Last edited by FazdaRX_8; 07-01-2013 at 10:30 PM.
#517
Hmm, I guess I was thinking of a different one. Do they only make one version? I have installed at least 10 different RX8 exhaust systems and I could have sworn the AP I installed last as like 2.5" or something. But obviously the pic you posted is 3" so maybe I am thinking of an Ebay one or the megan. I do know tbk here locally had the AP and the tips looked like **** after a month since they are just thin sheet metal tips.
you can always sand off the blue tint and polish them to be shiny "chrome" like, or you can take a torch and reburn them.
#518
SARX Legend
iTrader: (46)
Well the tips are not dual walled or cooled like others so no matter how much you polish them, the look like **** again soon after. I worked hard to keep my hks tips looking good but it was a losing battle. My turboxs tips look great after several years.
#522
Registered
iTrader: (15)
neither is BHR
they neck down to the OE donut size in the rear and also for the exhaust manifold/header connection in the front
not only that, but at the rear they don't even neck it down properly with a reducer, they just run the 3" pipe into a flange with the smaller hole and donut pipe size on the discharge side, which is the worst possible flow connection. It acts as a restricting orifice that way. You can just cut that off and replace it as per my earlier post
.
they neck down to the OE donut size in the rear and also for the exhaust manifold/header connection in the front
not only that, but at the rear they don't even neck it down properly with a reducer, they just run the 3" pipe into a flange with the smaller hole and donut pipe size on the discharge side, which is the worst possible flow connection. It acts as a restricting orifice that way. You can just cut that off and replace it as per my earlier post
.
#523
Just did another test to try see if the 2.25 rear pipe was the restriction or the muffler . Not hard to see which it is .......................
Green line : everything connected
Red line : muffler disconnected only , rear 2.25" pipe still in place .
Blue line : rear pipe disconnected - stock midpipe only .
![](https://www.rx8club.com/attachments/series-i-major-horsepower-upgrades-93/196886d1373157824-brettus-turbo-11-rear-pipe-removed-exp.jpg)
Sounded real sweet with the muffler disconnected though
Green line : everything connected
Red line : muffler disconnected only , rear 2.25" pipe still in place .
Blue line : rear pipe disconnected - stock midpipe only .
![](https://www.rx8club.com/attachments/series-i-major-horsepower-upgrades-93/196886d1373157824-brettus-turbo-11-rear-pipe-removed-exp.jpg)
Sounded real sweet with the muffler disconnected though
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Last edited by Brettus; 07-06-2013 at 08:03 PM.