RPi 545i exhaust: Take 2
03-06-2009, 05:09 PM
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My Ride: A Car faster than yours.....
So, we made some changes to the 545 exhaust (modify the transition, change rotation of inlet pipe and hangers). We put about 100 miles on the car then stuck it on the dyno. After, we put the stock exhaust back on the dyno, then we put this exhaust back on the dyno. I felt a little bad for Ryan's car but it was the only way to verify the exhaust performance. Here is the dyno history of this car.
Day 1
stock dyno pulls: 249whp
dyno w/ RPi exhaust version 1: 260whp (mainly top end gain)
Day 2
dyno w/ RPi exhaust version 2 after 100 miles (254whp + more tq)
stock dyno 243whp-249whp
Day 3
dyno w/ RPi exhaust version 2: 261whp + more tq.
Day 1
stock dyno pulls: 249whp
dyno w/ RPi exhaust version 1: 260whp (mainly top end gain)
Day 2
dyno w/ RPi exhaust version 2 after 100 miles (254whp + more tq)
stock dyno 243whp-249whp
Day 3
dyno w/ RPi exhaust version 2: 261whp + more tq.
03-06-2009, 05:38 PM
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My Ride: '05 545i Sport - MANUAL - Jet Black/Black
20" Miro Time Attacks, Bimmian Carbon Kidneys
Damn... That is a hefty gain. I smell a Nobel Prize... Sooooo does this count as the Race GT, or is this just a redux of the original? I am LOVING this so far. Best sounding system I've heard for the V8s
03-06-2009, 06:28 PM
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My Ride: A Car faster than yours.....
Originally Posted by MisledYouth' post='809769' date='Mar 6 2009, 07:38 PM
Damn... That is a hefty gain. I smell a Nobel Prize... Sooooo does this count as the Race GT, or is this just a redux of the original? I am LOVING this so far. Best sounding system I've heard for the V8s
03-06-2009, 06:49 PM
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My Ride: '05 545i Sport - MANUAL - Jet Black/Black
20" Miro Time Attacks, Bimmian Carbon Kidneys
Man, because of you guys, the 545's are getting up pretty close to 400hp. That's exciting news.
03-06-2009, 08:05 PM
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My Ride: A Car faster than yours.....
Originally Posted by MisledYouth' post='809814' date='Mar 6 2009, 08:49 PM
Man, because of you guys, the 545's are getting up pretty close to 400hp. That's exciting news.
03-07-2009, 04:25 AM
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My Ride: 2004 545i - Bone stock... help!
Originally Posted by RPIpower' post='809867' date='Mar 7 2009, 09:05 AM
We are trying hard. Our goal is to have a full line of exhausts for all new BMWs in the next few months.
03-07-2009, 11:31 AM
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My Ride: E60 M5, F85 X5M
Originally Posted by MisledYouth' post='809814' date='Mar 6 2009, 07:49 PM
Man, because of you guys, the 545's are getting up pretty close to 400hp. That's exciting news.
