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View Full Version : boosted autos


VaE39
11-14-2006, 07:27 PM
Well, this was just a thought but what if I was to supercharge or turbo my 99 528 auto. I know auto loses a lot of power and its not the same, but are there any boosted autos out there? I know the little 2.8 m52 can take some boost, but I dont know if it would be worth it. Any ideas?

n3rd420
11-15-2006, 04:11 PM
twin turbo 5 psi

Lanc3r
11-15-2006, 04:23 PM
twin turbo 5 psi


:rofl:

You do know the 528 is a 6 cyl, dont you?

To the original poster,

There are plenty of turbo and supercharger kits for your car. And they will still work with the Auto. So do some searching and let us know what catches your eye.

Lance

BeRzErKaS
11-15-2006, 05:20 PM
My auto tranny lasted 6k miles under boost before crapping out.

I then installed an m3 manual tranny and haven't had any problems since.

VaE39
11-17-2006, 07:06 PM
I was thinking VF s/c with level 10 tranny. I've heard good things about level 10.

54ODell
11-19-2006, 06:14 PM
I was thinking VF s/c with level 10 tranny. I've heard good things about level 10.

That's where I'm heading next... Level 10. It'll change the charateristics of your transmisson from what I understand. Shifts are much harder. VF is quite slow in their devlepment of stage 2, so I'm beginning to look into custom intercooler options rather than wait for their after cooler.

keepupchump
12-01-2006, 11:44 AM
damn i would love to see a tt bmw!!!!
any pics?

mark_m5
12-01-2006, 11:59 AM
damn i would love to see a tt bmw!!!!
any pics?

You need look no further than your local BMW dealer - the new 335i.
http://www.bmwusa.com/vehicles/3/335iSedan/gallery.htm

enjoy.

kbfire607
12-04-2006, 09:40 PM
go twin turbo instead of the supercharger and turbo b/c you'll get more power to ur car

IzzyX5
12-06-2006, 05:56 PM
If you do decide to go with FI, make sure you forge you rods, pistons, etc. because those motors werent designed to handle any type of boost. Not to discourage you. I guess if you keep your PSI low it wouldnt really matter.

When you start getting up into the "teens and twenties" of boost its about 10 HP per PSI... so if you were running 13 PSI normally, and you increase it to say 16 PSI, your going up about 30 HP. Just for thought.

mark_m5
12-06-2006, 08:28 PM
If you do decide to go with FI, make sure you forge you rods, pistons, etc. because those motors werent designed to handle any type of boost. Not to discourage you. I guess if you keep your PSI low it wouldnt really matter.

When you start getting up into the "teens and twenties" of boost its about 10 HP per PSI... so if you were running 13 PSI normally, and you increase it to say 16 PSI, your going up about 30 HP. Just for thought.

Huh? What motor is that? 6 psi on the S62 V8 = 270 hp gain (670 total). Active Autowerk, VF Engineering and Dinan all offer that (although still waiting on VF's kit for the M5). Discovery Automotive can push the motor to 1,000 hp at the crank, and they're the only ones I know for sure are swapping engine internals. Using your formula, that means they're running 40psi (34 + 6). Pardon my skepticism, unless you're talking about a Mini motor...

franka
12-25-2006, 06:53 AM
There are a number of firms that specialize in performance automatic transmissions. They offer many levels of build from very small, do it yourself kits, to all out racing units that will handle 2500 hp and many options in between.

So the answer is yes you can reliabily run an automatic behind a boosted motor but only if it's had some work done to it or the boost is very mild.

I do not have an auto tranny and I'm not knowledgeable about BMW trannys but I believe they are Hydromatic units, built by GM. There are many options for Hydromatics.