BMW Z3 Mechanics and Owners should I supercharge?
I have a BMW Z3 with a 3.0 straight 6. It's fast but installing a vortech supercharger sounds awesome for this car. Any advice?
- Anonymous1 decade agoFavorite Answer
a supercharger would drastically add horsepower to your car.
i have a e36 2dr with m3 motor and a powerdyne supercharger,
lots of power!
- Phillip SLv 61 decade ago
It depends a great deal on the driver. If you go thrashing about on a race track, you many find the Z3 under powered and unstable. If you want to try the autocross activity, I think you will find a dedicated group of Z-3 and Z-4 enthusiasts with well prepared cars. The stock Z-3 class is usually totally "stock" or "modified" a little bit. You would have to look at the rules to see what a supercharged Z-3 is allowed.Source(s): Licensed CA smog inspector.
- RyanLv 51 decade ago
It will work, and the engine can handle it, but it will significantly lower the lifespan of the engine. the 3.0 is a great engine straight from the factory, but if you want to get more power, owners and enthusiasts typically go NA with their modifications. Cold air intakes, exhausts, pulleys, headers, ECU tuning, and even street cams give enough power, and sound to please most drivers. Keeping your car NA (naturally aspirated) has a lot of benefits: the engine isn't being forced to work any harder while still putting out more power, in the case of underdrive pulleys, it is actually working less hard. The mods are easily removed in the event of selling the car, and there are no real long term effects on the engine. Would you want to buy a car that had a supercharger on it for a few years? I wouldn't.
A supercharger or turbocharger are the two best ways to get big HP gains, but with the power comes a great price. Any reliable kit is going to cost around $4000-$6000, and that should include everything you need, except a dyno. Once you have everything installed by a shop, and have had it tuned on a Dyno, you are looking at near $8000 for the entire ordeal. In the end you'll gain around 80-120 Hp to the wheels depending on how conservatively you control the boost control. With the NA setup, you could still gain around 40-50 HP, for an absolute fraction of the cost. If you scour the BMW forums, you'll find that most people really, really, do not recommend forced induction for BMWs.
BMWs are known to have some of the best NA engines in the world, and they were engineered to be so. If you really want the power, you could consider selling your car, and saving up for an //M division, they should have enough grunt to satisfy any enthusiast! Plus, the e46 M3 is going for cheap now that the e92 is out.
*****While I respect GBC, I firmly believe he is wrong. Anytime you take an engine set up to run producing 200 hp, and force it to make 300 hp for extended periods of time, the extra wear and tear on the engine is increased, hence the shortened life span. And as for being passive... I'm not sure what he means: a supercharger is belt driven, and supplies boost at EVERY RPM, all the way to the redline. A turbo charger operates similarily: the boost builds as the RPMs climb, but they typically deliver their highest amount of boost in the mid RPMs. BMW engines are set up to run at a very specific operation, they are not Fords or Chevys. An engine such as the one in my 328is, is a 2.8 liter, straight 6, producing 200 hp, and 207 ft lbs of torque. Now compare that to the 3.8 liter V6 found in the mustang that same year; it's producing only 150 hp and 215 ft lbs of torque. It's making 50 LESS hp, and only 8 more torques, with an extra liter of engine capacity. That is a testament to the engineering level of the BMW engine. That being said, the BMW is running at it's optimum level at stock, it's nearly impossible to exrtract more than 8 Hp with just a remap of the ECU. Adding the NA mods will help the stock engine maintain it's careful balance, while simply making it easier for the engine to breathe (air intake, exhaust system), easier to turn over and more efficient rotating masses (underdrive pulleys), and the ECU remapping or tuning further allows the engine to improve upon this newfound air concentration.
*** Again, I respect your answer, but disagree I must! Wanting more power is understandable, but for performance, the M division is the way to go. Anything other than that is designed for a comfortable, luxurious, sporty ride. And going forced induction is not the way to go. And as for eating //M cars for half the price: maybe in a straight line, but not everyone is into drag racing between stop lights. Plus, I'd still take my M5 over a supercharged Stang, the powerband of my naturally aspirated V8 is enough to get the 275/35/18 Toyo Proxes spinning going into third! Great talking to you!Source(s): 1998 328is 2000 M5 2002 M3- soon
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- SpeedRulesLv 61 decade ago
i am past owner of 2 bmw's (modified 318 & 328)....wonderful cars, good drivers, but with the exception of a few of the m series quite slow indeed, and so i fully agree with your need to have more rush off the line (gets worrisome always losing out to evos, hi-revving hondas and the like).
now 1st of all supercharging or trubocharging will not lessen the life of your car, unless you WOT (wide open throttle) constantly. these are passive systems and until you punch the go pedal hard create no boost or add any fatigue factor to your car.
2ndly, i've now scanned 6 articles dealing with adding boost to z3 6cyl engine, and in all cases they were bolt on low-medium boot fully utilizing stock internals. turbo/supercharger manufacturers producing bolt on kits tend to insure the appropriate install stage is within the capabilities of the engine.
here"s 1 example
so from what i can see your engine is entirely capable of about 40% gain (ie plus 80hp) which will allow you to finally run with the big dogs.
the vortech mentioned is a good option, price is fair (performance is always expensive) considering the power enhancement.
you have likely explored turbo options, which are more expensive, but more efficient especially for smaller engines. the piping tho' does tend to make them heavier.
if you have not reviewed them you might also look at nitrous kit install.for example....
these kits are easily installed and then tuned to provide boost to a level your engine can safely handle (so for you, real comfort zone, about 80hp, on the margin 90-100). inexpensive (and with stronger internals can be used in conjunction with a supercharger....my next upgrade).
explore it and talk to those that have installed these options (bmw forum) on the same car as yours....and tend to discount those who have not (for fear, lack of knowledge or no $)...generally all high rev's make a lot of heat, and if used excessively can cause fatique/breakage, stay within your engine's abilities and boost, power enhancement is well worth it, and will turn your propeller into a jet.
cheers & hey ryan
this is not a car forum, nor a debating forum, so will not go there, but basically they are passive, because they do not create forced induction until called upon.
.....so while my car dynos at 575, if i don't go WOT i will get basically same mileage as a stock 4.6 l gt (which is my block size.
in any event i agree with you bmw's are expensive and over engineered compared to any out of the box american product, but generally (and i have been there - done that) they are slow, and have poor get up & go, so enhancing a bmw where the internals can handle it, is fair ball....anyway this is my last post here....so go to it bmw guy, as i said..had 2 and of all my drives they were the slowest, and most expensive.
anyone like this guy thats posting here that wants to enhance his bmw by performance modification should be encouraged if it fits his build....its his ride, if its capeable and seems to be why not support it? who cares about how it came from the factory?? he wants it faster and so he should, basic bmw in all forms is a very slow vehicle and deserves to be improved.....anyway cheers to all.....and love to eat those
m series for breakfast (for 1/2 the price and still do a cross country roadtrip for 1/2 the cost).Source(s): love boost in all forms, 04 cobra with a whipple 15lbs boost- dyno'd 575rwhp http://www.cardomain.com/member_pages/show_image.p... former rides: 63 tr4a (modified), 68 firebird ho (modified) 72 olds 442, 1988 crx si (modified), 1994 buick regal gs, 1996 bmw 318 (modified), 1998 bmw 328 (made me give up on bmw's), 2002 alfa romeo 147 t-spark, 2004 cobra (modified)
- Anonymous1 decade ago
don't do it. the engine won't be able to handle it.
- Anonymous5 years ago
Showoff . . . .