Dinan
Contributors
Joined: Aug 2005
Posts: 11,432
Likes: 1
From: San Jose, CA
My Ride: E60 M5, F85 X5M
Originally Posted by E60714' post='634171' date='Jul 28 2008, 07:56 AM
In addition to Dinan, I just took a look at Vishnu's Stage 0 ECU remapping and I think it increases the hp by close to the same as the stage 2 dinan but is cheaper by quite a bit.
Contributors
Joined: Apr 2005
Posts: 7,363
Likes: 1
From: San Diego, CA
My Ride: 2007 E63 AMG | Obsidian Black | Schwarzes Nappa | Black BirdEye Maple | Premium II Package | Electronic Trunk Closer | Parktronic
Engine: RPi/Powerchips custom ECU tune, RPi Ram Air Kit (BMC filter, scoops), RennTech Sport exhaust, secondary cats, charcoal and resonator delete, custom AAA x-pipe
Exterior: 50% side windows / 35% rear window Formula One Pinnacle Series | Flat AMG hood emblem
Suspension: Renntech Lowering Module
Wheels/Tires: Radenergie R10, Falken FK452 245/30/20, Yokohama ADVAN Sport 285/25/20
-----------------------------------------
2005 545i Sport SMG | Ti Grau | Schwarzes Dakota | Anthracite Maple | Logic 7 | Nav
Engine: Custom AFE CAI, Superchips ECU remap, Sprint Booster, RDSport Dual Exhaust Conversion with Quad Pipes and X-pipe, 3 resonators deleted, 90mm tips!
Exterior: M-Tech Aero kit | M5 Mirrors | M5 Rear Bumper | Trunk Lid Finisher | Vorsteiner decklid spoiler | 50% Formula One Pinnacle Tint
Suspension and Brakes: Bilstein PSS9 coilovers, JBT BBK: 16" cross-drilled rotors, 8 piston and 15" cross-drilled rotors, 4 piston
Wheels: VIP Modular VR 02 20x9F, 20x10R | Toyo T1R 245/30/20F, 285/25/20R
Lights: PIAA 4150K Xtreme White Plus fog lights, AIB v3
MOST IMPORTANT: Hardwired V1; =)
ED Date: 4/7/05, Re-delivery date: 5/21/05
Originally Posted by pennetta' post='634130' date='Jul 28 2008, 06:51 AM
The 550 and 535 output numbers are at the rear wheels, BMW is required by federal law to do it this way. I looked at the Dinan White Papers and it lists a 10.8% drivetrain frictional loss at 4300 RPM and 12.2% loss at 5700 RPM. That adjusts the 421 ft/lbs at 4300 RPM to 380 rear wheel ft/lbs and adjusts the 384 hp at 5700 RPM to 343 rear wheel HP.
I have read many of your posts and you're pretty knowledgeable but sorry to tell you this time you're in error and that the numbers presented by BMW for the 550i (360 hp) and 535i (300 hp) are crank horsepower numbers.
Contributors
Joined: Mar 2004
Posts: 2,303
Likes: 1
From: Long Island, NY
My Ride: 2008 535i: June 6th start build, complete June 17th, at NY Port July 5th, at dealer July 10th, took delivery Friday July 13- Plantimum Bronze/Natural Brown Leather/Light Poplar, Sport Package, Sport Auto, Active Steering, Premium Package, CWP & PDC. Dinan Performance Software 384hp & 421 ft/lbs.
Originally Posted by EuroCarFan' post='634259' date='Jul 28 2008, 01:39 PM
I'm not sure where you're getting this info but BMW numbers are not at the wheel, they are crank numbers just as all other manufacturers. For example, BMW's spec for the M5 is 500hp but everyone that has dynoed their car have gotten anywhere from below 400rwhp to about 430rwhp, depending on which type of dyno. Some dynos are more conservative like the Dyno Dynamics machine and some will show better numbers like Dynojets. It also depends on the setup. Dinan's dyno has probably one of the biggest fans out there similar to something they'd use in a wind tunnel. It's supposed to more closely replicate real world conditions. On the other hand, the place that dynoed my car had one of the smallest fans I've ever seen and it was only pointing at my lower grill at the radiator.
As for DT losses, the 15-18% I spoke of is just a general guideline and have been used as a rule of thumb for years. I guess technology has improved quite a bit and DT losses have decreased through better engineering. If those are the numbers Dinan believes to be the correct values, that would be awesome.
As for DT losses, the 15-18% I spoke of is just a general guideline and have been used as a rule of thumb for years. I guess technology has improved quite a bit and DT losses have decreased through better engineering. If those are the numbers Dinan believes to be the correct values, that would be awesome.
Contributors
Joined: Mar 2004
Posts: 2,303
Likes: 1
From: Long Island, NY
My Ride: 2008 535i: June 6th start build, complete June 17th, at NY Port July 5th, at dealer July 10th, took delivery Friday July 13- Plantimum Bronze/Natural Brown Leather/Light Poplar, Sport Package, Sport Auto, Active Steering, Premium Package, CWP & PDC. Dinan Performance Software 384hp & 421 ft/lbs.
Originally Posted by E60714' post='635239' date='Jul 29 2008, 02:32 PM
Just got the BavAuto mag in the mail yesterday. Now with all the ideas given to me, the question is now where will I find the dough for all of it. 
Senior Members
Joined: Jun 2007
Posts: 308
Likes: 0
From: Vancouver, B.C.
My Ride: 2008 535i, Carbon Black, Black Dakota, Black Diamond Trim, 6sp Sport Automatic with Paddles, M-Sport Package, Premium Package
I am getting Dinan Stage II installed on Thursday on my 535i. I will post my opinions after the weekend. I am expecting a very noticeable performance improvement. We will see.
Contributors
Joined: Aug 2005
Posts: 11,432
Likes: 1
From: San Jose, CA
My Ride: E60 M5, F85 X5M
Originally Posted by pennetta' post='634504' date='Jul 28 2008, 03:01 PM
I assure you its been rear wheel horse power for many years, the old '70 Hemi Cudas were crank HP. I think it changed in the mid 1970's but they just changed it again for 2008 where you have to connect the a/c, water pump, alternator just like you were driving the car. Just like quarter mile times, Dyno test are subject to altitude, humidity, and temperature but 400 sounds very low but I don't know the circumstances. The M's do have a 400 HP mode and a 500 HP mode that you select in idrive.
And yes, I know about P400 and P500 on the M5.
Thread Starter
Senior Members
Joined: Jul 2008
Posts: 863
Likes: 0
Originally Posted by FRANK970' post='635446' date='Jul 29 2008, 04:22 PM
I am getting Dinan Stage II installed on Thursday on my 535i. I will post my opinions after the weekend. I am expecting a very noticeable performance improvement. We will see.
Yes, please do. Their business may depend on it.
And if you could, please give estimated times on 0-60 and such.
Contributors
Joined: Mar 2004
Posts: 2,303
Likes: 1
From: Long Island, NY
My Ride: 2008 535i: June 6th start build, complete June 17th, at NY Port July 5th, at dealer July 10th, took delivery Friday July 13- Plantimum Bronze/Natural Brown Leather/Light Poplar, Sport Package, Sport Auto, Active Steering, Premium Package, CWP & PDC. Dinan Performance Software 384hp & 421 ft/lbs.
Originally Posted by EuroCarFan' post='635460' date='Jul 29 2008, 05:57 PM
Sorry to beat a dead horse....but you are incorrect. ALL manufacturer's hp and torque numbers are at the crank. That's why people use dynos to get their wheel hp. I know dynos are subjective to a lot of conditions that's why they apply correction factors to normalize the numbers. The highest numbers I've seen have been around 430rwhp for a stock M6. Even highly modified M5s/M6s with mods like mine have registered around 460rwhp-480rwhp. If you read articles on modded cars they will usually tell you if they're quoting power at the wheels or at the crank and will also tell you what the manufacturer's crank hp numbers are for comparison.
And yes, I know about P400 and P500 on the M5.
And yes, I know about P400 and P500 on the M5.
Thanks for your persistance in setting me straight.