RPI Dyno charts for 545i/550i
10-31-2008, 04:29 PM
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Navin's 545i with V1 scoops. Increase of 7 ft lb of torque and 5 hp in the mid-range. Mods are M5 stock exhaust (singe-side), K&N filter, and Sprintbooster prior to the RPI scoop.
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.
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.
10-31-2008, 04:38 PM
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My Ride: 2004 545i SGM Steptronic Dinan CAI Dinan TB GTech Pro RR
Originally Posted by joet@raceprecision.com' post='709179' date='Oct 31 2008, 07:29 PM
Navin's 545i with V1 scoops. Increase of 7 ft lb of torque and 5 hp in the mid-range. Mods are M5 stock exhaust (singe-side), K&N filter, and Sprintbooster prior to the RPI scoop.
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.
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.
10-31-2008, 04:44 PM
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My Ride: A Car faster than yours.....
Originally Posted by brandsb' post='709188' date='Oct 31 2008, 05:38 PM
Very impressive. Could one assume a similar gain to Iceman's 550 on a 545 with V2 or is the intake different?
10-31-2008, 04:46 PM
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My Ride: 2004 545i
Production date: 02/04
Color: Black Sapphire Metallic
Trim: Anthracite
Options: Sport package with STEPTRONIC, Premium Sound, Rear Sunshade, Xenon
Originally Posted by RPIpower' post='709189' date='Oct 31 2008, 08:44 PM
The mounting is different and the motors react different to the scoops. Besides, they are essentially the same design with different mounting. I have to make a new jig for the 550 scoop so they wont be released until the week after SEMA.
10-31-2008, 04:51 PM
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My Ride: 2004 545i
Production date: 02/04
Color: Black Sapphire Metallic
Trim: Anthracite
Options: Sport package with STEPTRONIC, Premium Sound, Rear Sunshade, Xenon
I get it now 
10-31-2008, 08:32 PM
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hmm I don't get why the dyno for the 550i is so low... I thought even with the drive train loss it's HP should be somewhere above 300 HP+ since BMW claim 360 HP for stock 550i. 100HP Drive train loss seems a bit much for me 
10-31-2008, 10:41 PM
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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.
11-01-2008, 01:43 PM
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Originally Posted by joet@raceprecision.com' post='709384' date='Oct 31 2008, 11:41 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.
