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Old 11-13-2003, 03:03 AM   #1
EMPOWERD
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DILEMMA!!! E46 Turbo or Supercharger???

Guys, I have a good friend with a black '99 E46 323i that has saved up enough money to get 1 of 2 things....

1) Custom turbo kit from a very reputable tuner. Kit includes turbo, wastegate, intercooler, BOV, manifold, piping, software programming and has warranty. Installed and turn-key with approx 250rwHP from 8psi
2) AA Supercharger kit for the same price, he installs it at home with tools. Kit boasts also 250rwHP @8psi and uses an Austrian Rotex blower with aftercooler.


--Turbo will be installed and dyno tuned locally so service can be easily attainable. Boost can also be turned up in the future easily once a decision is made to strengthen internals.
--AA's Rotex supercharger is max'd out @8psi and tech support is limited to phone calls. They do have much R&D behind the kit though.
--Both almost identical price, except the turbo is installed.

WHAT WOULD YOU GET?
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Old 11-13-2003, 03:05 AM   #2
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hmmm, thats a tough one, I have always been biast towards superchargers.....I love the whine, I imagine he would have to worry about turbo lag, or would he?!
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Old 11-13-2003, 03:08 AM   #3
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Turbocharger sounds like the better deal in this equation. Shop tuned and installed, can be serviced by someone who knows the system. Most aftermarket part manufaturers will only warranty items if installed by a shop, and the shop should also warrant the work done as far as the install goes. No competition here.
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Old 11-13-2003, 03:08 AM   #4
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don't think there would be much lag, but he'll definitely see better fuel economy from the turbo car when driving normal if he stays out of boost. The blower uses a lot of parasidic drag on the crank.
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Old 11-13-2003, 03:10 AM   #5
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turbo
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Old 11-13-2003, 03:10 AM   #6
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Solution: E46 M3 engine swap, get that one off ebay i posted
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Old 11-13-2003, 03:12 AM   #7
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i would go custom turbo.....i assume he would only get parts warranty on the supercharger since he would be doing the instal....with the turbo he would have warranty if something went wrong with the instal, right ?
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Old 11-13-2003, 03:12 AM   #8
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Whats the price difference between the two? I guess it seem like the turbo is much more expandable in terms of performance.....Is his suspension beefed up to handle the power as well as other important items? I guess you have to account some extra cash for that.....
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Old 11-13-2003, 03:21 AM   #9
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Both the same price... suspension has H&R coilovers, cat back exhaust, 19" wheels, full body kit, yada, yada, yada....

No motor swaps.
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Old 11-13-2003, 03:25 AM   #10
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Itz a tough decision... but I think I'd lean more towards the Turbo in this situation.
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Old 11-13-2003, 03:42 AM   #11
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Id say turbo, Casue the SC is way more harder on the tranny cause the higher the RPM the faster the blower spind, I would go Turbo casue its more versitile(SP) in the furute, once he gets stronger internals, that turbos power is all upto how much the block can hold, where as to the SC is maxed unless he takes the charger apart to change the pulley, but that always makes boost max out quicker making more stess on the tranny, I like the turbo idea, better for traction as well, SC make massive off the line power, where as the turbo spools up an a certain RPM range thus giving better take offs. but hey what do I know!

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Old 11-13-2003, 03:46 AM   #12
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you're right Harpri, the blower would be harder on this clutch for one, plus the turbine is maxed out pushing cfm's.... no matter what pulley goes on.
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Old 11-13-2003, 04:11 AM   #13
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Randy,

Get the one that offers the BEST software tuning. Either one is crap if the maps are all out of whack.

Since his car is OBD-II there is only a hand full of people who can properly tune an OBD-2 car. AA is one of the companies that know what they are doing.

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you're right Harpri, the blower would be harder on this clutch for one, plus the turbine is maxed out pushing cfm's.... no matter what pulley goes on.
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Old 11-13-2003, 04:20 AM   #14
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I know what you're saying Serge... that was one of my concerns... but like I said, this turbo tuner is very experienced with tuning F/I cars and mastered OBD-II diagnostics.

This thread is under the assumption that both kits will be properly tuned and turn-key.
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Old 11-13-2003, 05:11 AM   #15
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Randy,

I'd personally say Turbo, not b/c I'm a Turbo biased freak, but it offers lots of room for improvement. My guess is that if he waits it out AA will eventually come out with kits for the E46's. They probably don't have a kit right now b/c most E46's are still under the manufaturer's warrenty.

But this is my personal thoughts. If you have a very knowledgable tuner, time is not a big issue, or you're a very hands on guy, then custom is the way to go. There's a guy on B/F who's running a custom T3/T4 w/T60-1 compressor. On stock compression @ 8psi he's pushing 406WHP with timing not optimized but set conservatively. James only puts out approximately 385whp or so @ 8.5psi as stated by Jon a while ago (figures should be around there).

Plus going turbo allows him/her to play with boost levels. As long as the car runs fine from all the dyno tuning, then you got yourself a deal via custom work.
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