RPI Dyno charts for 545i/550i
11-03-2008 | 06:16 AM
#11
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Originally Posted by joet@raceprecision.com' post='709384' date='Nov 1 2008, 01:41 AM
Now, take ICEMAN316's 2007 550i. His peak hp number is 266rwhp which equals 345 crank. This puts him 15 hp UNDER BMW's stock rating of 360. This can be attributed to his custom M5 Eisenmann exhaust. It's our belief that with the stock exhaust he would recover the lost power, if not have an increase from 266rwhp. What is most important is to pay attention to the gain under the curve. From about 2000 rpm to 4500 rpm, there is an increase of 14 ft lb of torque and 7 hp gain.
If we were able to obtain a stock 550i, the curve would look identical to ICEMAN316's except the peak hp will be 284rwhp (stock 277rwhp + scoop 7rwhp) equal to 369 crank.
If we were able to obtain a stock 550i, the curve would look identical to ICEMAN316's except the peak hp will be 284rwhp (stock 277rwhp + scoop 7rwhp) equal to 369 crank.
11-03-2008 | 05:18 PM
#13
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Joined: Apr 2008
Posts: 2,596
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From: New Jersey
My Ride: '05 545 Titanium Silver, Black Leather - Nav, Logic 7, Cold weather.
Mods:
Carbon filter removed.
M5 iDrive knob.
Umnitza license plate LEDs.
MP3
40% 3M tint
ACS Anti-Roll(sway) bars
RPI Scoop
G-tech Pro RR
CF Roundels
CF Wheel caps
I've been trying to get some testing done using my g-tech pro which is a totally different kettle of fish compaired to testing on a dyno. Currently I have V1 of the scoop installed with no duct tape 
I want to try with and without the scoop. I need to find a nice level place to test with better traction, I've only been getting 0-60 times > 5.5 but can sense the traction control kicking in or spinning the wheels if its not on, it feels like it wants to do better. If I can get some consistent numbers then I can try with and without the scoop, with and without tape. The advantage over the dyno would be a real airflow into the scoop. I would not need to take in to account the HP loss due to aerodynamic drag of the car since we are just looking for gains due to the scoop but you could not compare the HP numbers to the dyno.
I want to try with and without the scoop. I need to find a nice level place to test with better traction, I've only been getting 0-60 times > 5.5 but can sense the traction control kicking in or spinning the wheels if its not on, it feels like it wants to do better. If I can get some consistent numbers then I can try with and without the scoop, with and without tape. The advantage over the dyno would be a real airflow into the scoop. I would not need to take in to account the HP loss due to aerodynamic drag of the car since we are just looking for gains due to the scoop but you could not compare the HP numbers to the dyno.
11-19-2008 | 07:47 PM
#14
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[quote name='joet@raceprecision.com' post='709179' date='Oct 31 2008, 07:29 PM']ICEMAN316's 2007 550i with V2 scoops. Increase of 14 ft lb of torque and 7 hp in the mid-range. Mods are custom M5 Eisenmann Race, Speed Innovation remap and Sprintbooster prior to the RPI scoop.
/quote]
so, where are we with the 550 v2 scoops?
/quote]
so, where are we with the 550 v2 scoops?
11-20-2008 | 10:43 AM
#16
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Originally Posted by joet@raceprecision.com' post='725907' date='Nov 20 2008, 12:00 AM
550i V2 scoop is available for purchase. You can order directly through RPI or Trinity.
11-20-2008 | 07:10 PM
#17
Senior Members
Joined: Dec 2006
Posts: 308
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From: Los Angeles
My Ride: 2008 Silver 535i Virgin--Becoming a Beast!
Originally Posted by joet@raceprecision.com' post='725907' date='Nov 19 2008, 10:00 PM
550i V2 scoop is available for purchase. You can order directly through RPI or Trinity.
Where is my Dyno chart? You should add it to this thread.
Jay C
someday I'm going to have to learn how to read this thing! 
11-20-2008 | 07:38 PM
#20
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From: SoCal
Originally Posted by joet@raceprecision.com' post='709384' date='Oct 31 2008, 10:41 PM
The dyno that is used is the Dyno Dynamics. It's numbers are a lot lower than what most are familiar with the Dyno Jet numbers. Having said that, navin's peak hp number is 254.3rwhp. Divide this number by .77 to convert to crank hp equals 330. Stock 545i crank numbers are 325hp. None of navin's mods: stock M5 exhaust, K&N filter, and Sprint Booster is causing any loss of power.
Now, take ICEMAN316's 2007 550i. His peak hp number is 266rwhp which equals 345 crank. This puts him 15 hp UNDER BMW's stock rating of 360. This can be attributed to his custom M5 Eisenmann exhaust. It's our belief that with the stock exhaust he would recover the lost power, if not have an increase from 266rwhp. What is most important is to pay attention to the gain under the curve. From about 2000 rpm to 4500 rpm, there is an increase of 14 ft lb of torque and 7 hp gain.
If we were able to obtain a stock 550i, the curve would look identical to ICEMAN316's except the peak hp will be 284rwhp (stock 277rwhp + scoop 7rwhp) equal to 369 crank.
Now, take ICEMAN316's 2007 550i. His peak hp number is 266rwhp which equals 345 crank. This puts him 15 hp UNDER BMW's stock rating of 360. This can be attributed to his custom M5 Eisenmann exhaust. It's our belief that with the stock exhaust he would recover the lost power, if not have an increase from 266rwhp. What is most important is to pay attention to the gain under the curve. From about 2000 rpm to 4500 rpm, there is an increase of 14 ft lb of torque and 7 hp gain.
If we were able to obtain a stock 550i, the curve would look identical to ICEMAN316's except the peak hp will be 284rwhp (stock 277rwhp + scoop 7rwhp) equal to 369 crank.