S50/S52 guys! RMS Superchargers

[M-technik-3]

Hoping to have mine next month. :)

Assume you went with the stage II variant, Matt?

[MR 325]

Hoping to have mine next month. :)

[THATDONFC]

Unfortunately, our kit is not CARB approved. I think the only kit with CARB approval is DINAN.

[pig4bill]

CARB approved?

[THATDONFC]

Prices on the stg3 and 4 are not solid yet. We only have custom stg3 setups. The sale will go on as long as Osh wants it too. :D Im not sure when it will end.

[OOMPH!]

Shit! My S52 in my M3 is beggin for a stage 2 :eeek: :twisted: Hmmmmmm

[Bimmerman325i]

How much would the Stg 3 or 4 cost? I can't find it on the ebay page.

I'm having evil ideas of a Stg 3 US motor or a Euro 3.2 with the euro kit.....

Also, for how long will this sale go for?

[mentaleeill]

It would be a long time before I would be buying a kit as well but hopefully by next spring. What kind of numbers could you expect from a M50B25 non vanos with m3 cams?

i dont believe they have software for the 402/403 nv dme, and you wont be putting m3 cams in it either.

[Blip Bavarian]

dyno??

are the numbers for the s50 and s52 the same??

[BlackE30]

I want one, bump for a bad ass setup.

[e30damen]

It would be a long time before I would be buying a kit as well but hopefully by next spring. What kind of numbers could you expect from a M50B25 non vanos with m3 cams?

[THATDONFC]

Sorry, I don't mean to hijack the thread. Feel free to PM me if you want to further discuss this.

Good idea.

-Chris

[Wh33lhop]

Well the blower is forcing air into the motor at all times. So if you are driving like a normal person on the highway or cruising it will yield better gas mileage. If you do a lot of spirited driving then your gas mileage will be worse. It'll only get you 1 or 2 more mpg. nothing more.

That's exactly it though; you need to maintain a certain AFR--it doesn't matter if you're forcing air in, assuming the same acceleration in the same conditions you're going to use the same amount of air and fuel in both situations (whether the air is pressurized or not is irrelevant, you need the same mass of air and the same amount of fuel) assuming no parasitic loss to the blower. Since you'll be using the same amount of air and fuel at partial throttle, the main difference is that you're running a parasitic compressor off the crank and converting some of the energy that the engine is putting out into heat which will translate into increased IATs.

Bottom line, even if the efficiency is the same you are still losing power by putting energy into spooling the SC.

Sorry, I don't mean to hijack the thread. Feel free to PM me if you want to further discuss this.

[THATDONFC]

Longevity? Or should I say time between rebuilds of the SC unit. Are they DIY rebuild or do they need to be factory rebuilt ie kits are not available to general public?

The blower will need to be sent in to Vortech if it needs to be rebuilt. But the good thing is, these blower last for over 100k miles.

Not sure how a supercharger can increase your gas mileage; can you elaborate? Driving a compressor off the flywheel and adding bigger injectors only spells shitty gas mileage to me. Unless the tune is godlike I couldn't really fathom an increase in mileage.

Well the blower is forcing air into the motor at all times. So if you are driving like a normal person on the highway or cruising it will yield better gas mileage. If you do a lot of spirited driving then your gas mileage will be worse. It'll only get you 1 or 2 more mpg. nothing more.

[rneedham1979]

Most forced induction can increase gas mileage if driven responsibly.