miguex

Ah! I don't see the ones with AFE results?

I would really like to see ones with AFE even with DINAN. Why all RPI?

RPIpower

M5s have different numbers because of engine variance and because of how the cars are driven. The ECUs learn driving style, etc. The customer that dynoed 383whp does not drive the car hard at all.

None of the cars here have AFE products because they know better and most of these guys were here when we dyno'd the AFE car.

We've already dyno'd the AFE intake systems 3 times. Why do it again? PLEASE READ: http://www.m5board.com/vbulletin/e60-m5-e6...yno-review.html

If you read that, you probably wont have to ask the same question again.

C's Bimmer

Then I must be getting 650 rwhp. I don't need any more performance mods! Woohoo!!!

Trinity Autosport

Guys,

Whoever purchased the AFE intake from me please go to my thread and list your name for a refund...thank you.

http://forums.e60.net/index.php?showtopic=64310

joe@raceprecision

Easy explanation. Rambird, having gotten his M5 recently, drives it hard and often whereas JC58 rarely ever drives his. When JC58 does drive, he babies his M5. Remember folks, the car learns your driving habits and makes the adjustments accordingly.

Now, with EM_5, he's having an exhaust leak that will soon be prepared. Adjustments were made by an exhaust shop other than RPI.

miguex

Interesting! do you mean to drive hard = gain more HP? I didn't know it.

Gene

EuroCarFan

I know that has been a theory with these cars but it'd be really interesting to verify and have JC58 go nuts with his driving style for the next month and re-dyno. Seriously, I'm very interested to see the results and so will others.

BTW, how would you describe driving a car hard? By always being in P500S mode or like me, I'm mostly in P400 mode as I'm usually in traffic but I usually stay in a lower gear and have my rpm between 4K - 5K most of the time.

miguex

EM_5

Yes, I was the one with 407 hp. For the record, my car dyno'd with the exact same setup at RPI a few weeks before and consistently got 412 hp. The only difference is that I (brain-freeze, ignorant, naive...) had the sec 3 welded in because I wanted the tips about another 1/2 inch out and wanted to fix a minor leak... remember, with the leak, I got 412 with just CF delete, Ram Air, BMC's and section 3 from RPI. No other mods (yet). By welding in the exhaust, the shop put an irregular bend on both sides of my exhaust. Once RPI saw this when my car was loaded on the dyno, he already said that it may be a problem. Bingo... that coupled with the 90+ temps caused a drop in 5-6 hp at the wheels for me. I will rectify the exhaust problem and re-dyno. I have confidence that I will get the 412-414 (after leak fixed and pipes corrected) once again.

Rambird's dyno run was also in the morning, where the temps were a good 20-25 F degrees cooler than when my high noon runs were performed. True the dyno compensates, but the heat soak @ high noon may/will cause the ECU to de-tune to protect the vehicle. That, no dyno can compensate for. RPI have seen many many M5's dyno baseline stock at anywhere between 385-395 ish.

NOTE: Remember guys, most of these numbers posted were done in SHOOT-OUT mode on the dyno, and were not raw numbers. Mine was, because I requested for it. Shoot-Out mode basically adds or subtracts HP from a baseline M5 that dyno'd from the same day (the first one, I'm guessing?). This is for purposes of comparing one car to another. So if the original car that everyone is based off of was off, everyone will be off (hard numbers wise) in relation to that car. RPI, correct me if I'm wrong.