Ok Which is the best supercharger kit for an E46 M3??

[CarbonM3SMG]

Hey everyone,
I'll be purchasing my new 2005 M3 in the next week and have a few questions. First what supercharger kit is best for the m3? I want to spend between 8k-10k on it ,and i want one with a front mount that fills the front bumper like the tecknik one, but i haven't seen any info on their supercharger kit for the m3..

Also what would be the exhaust setup to do for a supercharger setup i don't want it annoying loud but i want a good deep sound and i wanna get rid of the raspiness? All I had on my ast m3 was an eismann muffler so how far should i go? sorry im kinda a virgin to bmw's i just know the simple stuff.. so if any of you hardcore builders can help me i'd appreciate it and if anyone can name some good places to buy this stuff rom that would be awesome. :) thanks for any and all help it's extremely appreciated :bow:

[Solid]

I'd wait for more info about the Tecknik kit for the M3. I think ESS and AA also make kits for the m3 in that price range.

[bogie]

RMS has a kit available which looks and sounds INSANE. I have seen and heard the kit. I will be purchasing it VERY soon. It costs a couple of thousand more than the AA kit, but it is much safer because it drops the compression ratio to 9.8:1. Plus they offer a 3 year unlimited mile warranty unlike AA. The kit is also putting out 450rwhp. Ask for Osh (RMS-818-778-6106) and tell him Lawrence sent you. He will probably be willing to work out a deal.

BoGiE

[Solid]

Be very careful with RMS, I've heard allot of horror stories about them.

They have a BBB rating of F
http://www.labbb.org/BBBWeb/Forms/Business/CompanyReportPage_Expository.aspx?CompanyID=13066934&hAKAID=13&hAddrID=10

RMS has a kit available which looks and sounds INSANE. I have seen and heard the kit. I will be purchasing it VERY soon. It costs a couple of thousand more than the AA kit, but it is much safer because it drops the compression ratio to 9.8:1. Plus they offer a 3 year unlimited mile warranty unlike AA. The kit is also putting out 450rwhp. Ask for Osh (RMS-818-778-6106) and tell him Lawrence sent you. He will probably be willing to work out a deal.

BoGiE

[Mikey@CDesign]

Here is a launch video of the ESS M3 CSL

ESS M3 CSL (http://www.esstuning.com/admin/upload/20040722113341.wmv)

[Jojo@DPE]

Also what would be the exhaust setup to do for a supercharger ... ? :

i'd recommend a custom bent exhaust. :thumbup:

[M3LTDOWN]

You should see JMWeb's AA supercharged M3.
460 RWHP!!!!!!!!!!!!! 500+ BHP

Now that is a sick setup!

[MrBlonde]

My understanding is that you've got one choice: the AA supercharger kit (http://www.activeautowerke.com/ProjectE46M3/default.cfm) that uses the Rotrex C38 supercharger and claims 440 bhp or the ESS supercharger kit (http://www.esstuning.com/default.asp?c=shop&cat=93&subcat=101&subcat2=143&id=) that uses a Vortec V2SQ supercharger and claims 435 bhp.

The RMS (http://www.racemarque.com/shop/asp/product.asp?recorprod=1&product=31&cat=11&ph=&keywords=&recor=&SearchFor=&PT_ID=) website says their offering is under construction.

The issue with supercharger "kits" for the E46 M3 is that the S54B32 engine runs 11.3:1 compression so you cannot add any meaningful boost without detonation.

The solution is to fit low compression pistons and boost away. This will result in an awesome car, be it turbo or supercharger for those who like to come second ;-)

However "kits" by nature mean a promise you don't have to open the engine, so AA and ESS have designed systems that runs only 5.5 psi and reduces the redline from 8000 RPM to 7600 RPM. My opinion is that this is retarded, but if you've got your heart set on keeping your head gasket clamped down for the life of your car then I guess it's the only way.

Opening up the engine and dropping in low compression pistons would allow the 8000 RPM to stay and some good boost numbers to be pumped into the S54B32. And it's only a matter of time until people start doing this. But it will never be a "kit".

[Iceman1]

Opening up the engine and dropping in low compression pistons would allow the 8000 RPM to stay and some good boost numbers to be pumped into the S54B32. And it's only a matter of time until people start doing this. But it will never be a "kit".


how about just getting a thicker head gasket? wouldnt that also lower compression as well?

[MrBlonde]

how about just getting a thicker head gasket? wouldnt that also lower compression as well?

Yes it is possible to lower CR by fitting a thicker head gasket. That's not a well engineered solution though and I wouldn't recommend it. Like using water/alcohol spray onto your intercooler.

Plenty of people do both and never experience issues but that doesn't make them good solutions.

[Mr Paddle.Shift]

Yes it is possible to lower CR by fitting a thicker head gasket. That's not a well engineered solution though and I wouldn't recommend it. Like using water/alcohol spray onto your intercooler.


I know this is not the topic of discussion but I'd like to point out that intercooler spray can be a well-engineered heat transfer solution. I agree that it's not a simple "get-that-pump-with-some-nozzles-and-spray-for-period-of-time" kind of solution. Since heat transfer in this situation depends on vehicle speed, ambient temperature, spray pattern, spray flow-rate, charged air flow rate, one can still design the hardware and a feedback controller to achieve the optimal effects. It takes time to design such a system and I admit it's not easy. I have one such system on my car right now and so far the data from my track records are satisfactory.

Again, pardon for driving the topic off course.

[MrBlonde]

I know this is not the topic of discussion but I'd like to point out that intercooler spray can be a well-engineered heat transfer solution.

Nozzles can clog and water can run out leading to detonation. It's just one more weak point in the chain you can eliminate. A good air to air intercooler is a better solution.

[TaZaM3]

AA offers a W/A injection into the intake manifold.

[omes]

AA offers a W/A injection into the intake manifold.

HUH? Why would you want to spray water into the intake manifold....you can't be serious. :dunno:

[Mr Paddle.Shift]

Nozzles can clog and water can run out leading to detonation. It's just one more weak point in the chain you can eliminate. A good air to air intercooler is a better solution.

Nozzle clogging has much to do with contaminants in water. I use either distilled or DI water. Trust me, I did my homework. A good 5-gallon tank lasts for two track sessions of 30mins each. When I started out this project, it was never meant for street or highway use anyway, which is why I never post much about this project on this forum. Detontation is never an issue either, water injection takes care of that if needed.

True, the intercooler spray is not a direct replacement for using a better air-to-air intercooler. I already have a better intercooler developed by TE. But it's the track weather that dictates what kind of IAT you're getting. No single intercooler is made to be that robust. At track temperatures up to 40~45C, it's good to have such a system ready at your finger tip.