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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 05-09-2007, 02:39 PM   #1 (permalink)
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Driving Experience: VF-supercharged E39 540i--aka My New Pet Snail

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As many of you know, I bought my E39 540i from Bimmerwerkz.com user Eric S. back about seven months ago. It had 130,000 miles on it and had been very well-maintained, with many very tasteful upgrades, all of which I would have done myself anyway. Since then, the car has become a Dinan 5 with further suspension work, a Dinan free-flowing cat-back exhaust, and software. I previously drove an E36 M3, and while I was very impressed with the 540's greater torque and horsepower numbers, I knew somewhere down deep that I would eventually want to go F/I--and sooner rather than later.

After a lot of thought and budget-calculating, I settled on the VF Engineering supercharger kit. The numbers for the kit from the VF dynos are 415 horsepower and 400 ft-lbs of torque at 6psi. That is running on 91 octane California gas and with the stock exhaust system. Given that I always run on 93 octane and have a free-flowing exhaust, I would imagine that my numbers are now a tad higher than that. For comparison's sake, the numbers for a stock E39 M5 are 394 hp and 369 ft-lbs of torque.

Before, I drove a highway beast. Drop it into 3rd gear at 55 mph, and I practically ruled the road.

Now, I drive a highway monster. Huge gobs of power are available in every gear. Changing gears when I'm really going for it means that the car takes a HUGE lunge forward when the clutch engages. The exhaust sounded great before. Now it sounds deeper, bassier, meaner at low RPM, and at high RPM, it practically sings. I haven't taken it to a track or dynoed it yet, but I have every confidence that I'll be quite satisfied with the results when I do.

What is most impressive to me is the smoothness of the results. The E39 540, despite its huge amounts of stock torque, accelerates more smoothly than any other car I'd owned due to the rail-flat torque curve. The supercharged version has a much steeper torque curve...but it is equally flat. It presses me firmly back into my seat when I give it the beans, no question. If it was the ultimate driving machine before, I can't even think of adjectives to describe it now.

Kit cost from VF: I paid $6,000, but I hear there's a group buy going on now over at bimmerforums so you can get it for less.

VF recommends 10-11 hours of labour.

I have an obsessive-compulsive mechanic who makes everything look OEM and act flawlessly, so I got charged 25 hours of labour. (And given the quality of Ron's work, I don't begrudge him a minute of it.)

Needless to say, I'm on cloud nine right now.
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Old 05-09-2007, 02:46 PM   #2 (permalink)
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wish i had an extra 6k to throw into my car :\ :dreams
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Old 05-09-2007, 02:48 PM   #3 (permalink)
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Old 05-09-2007, 02:51 PM   #4 (permalink)
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dude congrtats!
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Old 05-09-2007, 02:57 PM   #5 (permalink)
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Old 05-09-2007, 03:07 PM   #6 (permalink)
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Thats awesome! Do you have to break it in for a while?
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Old 05-09-2007, 03:15 PM   #7 (permalink)
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Old 05-09-2007, 03:18 PM   #8 (permalink)
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Originally Posted by 94BMW325i
Thats awesome! Do you have to break it in for a while?
Nope, apparently it's good to go right out of the box.
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1995 E38 740i. Highly modded. Faster than you.

Sold 2-28-07: 1997 E36 M3/4, 8-30-05 RIP 1997 528i


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Old 05-09-2007, 03:20 PM   #9 (permalink)
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Have you told Eric yet?
Very impressive!

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Old 05-09-2007, 03:26 PM   #10 (permalink)
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Have you told Eric yet?
Very impressive!

LOS
Emailed him earlier this week, no response yet. Hopefully will be able to see him this weekend while swinging through Richmond on my way back from DC.
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1995 E38 740i. Highly modded. Faster than you.

Sold 2-28-07: 1997 E36 M3/4, 8-30-05 RIP 1997 528i


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Old 05-09-2007, 03:35 PM   #11 (permalink)
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I want one...
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Old 05-09-2007, 04:39 PM   #12 (permalink)
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sweet.
I can't wait to be in 400hp land...
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Old 05-09-2007, 05:01 PM   #13 (permalink)
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looks amazing ... and i bet it goes equally well.

stock clutch holding the power just fine?
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Old 05-09-2007, 05:22 PM   #14 (permalink)
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Emailed him earlier this week, no response yet. Hopefully will be able to see him this weekend while swinging through Richmond on my way back from DC.

I bet he'll try to buy the car back from you.

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Old 05-09-2007, 06:02 PM   #15 (permalink)
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that's awesome!!!
you made a good decision!
now the real question is: when are you making it stage 2 or 3? (or maybe adding a nice little turbo and taking on eric's banana boat)
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