Micheles New Rocket Ship-Impressions after 1 Week

[johnrando]

Oh man. That car is AWESOME!

+1 that the model is a LOVIN.

[danewilson77]

Very nice Michele. Is that 19% drive train loss, and only 266 Hp to the wheel? For whatever reason...I thought you would have closer to 300 to the wheel?

[MsRN]

I love how your dyno sheet has vehicle type listed as "330i (wrong) BMW 2004 LOVIN"


also, I spy a stock intake... is there engine eye candy in the works? (not like you need 5hp)

Sorry, Hermes--busy week! John Lovin is the p.o. twice-removed who bought the S/C and had it installed in late 2009, as I recall.

CAI upgrade? My best guess is that--since the S/C and intercooler are already significantly increasing air density--a CAI would be strictly 'eye candy.'. Besides, I'm trying to troubleshoot the cold engine idle problem/stutter right now, and will save my pennies for that!

Short-term, I need to worry about winter wheels, gaskets, plugs, fuel filter, brake, diff and tranny fluids, detailing, camber plates, and the PS mirror I broke this week (don't ask--I was being dumb). I'm trying to figure out if I can retrofit folding mirrors to the car, as garage space is tight (hence the broken mirror). Eye candy is very tempting, though!

[MsRN]

Very nice Michele. Is that 19% drive train loss, and only 266 Hp to the wheel? For whatever reason...I thought you would have closer to 300 to the wheel?

Honestly, Dane, I don't know. I'm not sure what drag power comprises: drivetrain alone, or drivetrain plus the cars drag coefficient (is that the right term?). For that matter, I don't understand the difference between engine power and corrected power, which is just over 8% higher. Doesn't 19% loss seem a bit high to you?

[danewilson77]

No need to worry about drag coefficient.

I was referring to the loss that occurs between the piston to the wheels.

They say it typically ranges 10-15%, but then if you factor in dyno accuracy...yours is prolly ballpark.

HTC Thunderbolt+TT

[jreyes19]

which rims do you have on
i do like the ones in the 3rd to last picture

[MsRN]

Sorry not to reply sooner, JReyes! I like those rims, too! But the car came with the other set of rims.

[cakM3]

Congrats on the rocket Michelle

I had the pleasure to drive an ESS twin-screw a few weeks ago. A friend of mine has it in his 330i ZHP....what a ride Don't know if I would race him in my "stock" ///M but it would be fun...

Now I want to get a supercharger but which car to put it in???

[RITmusic2k]

FYI, "corrected" power is a SAE scaling factor to normalize all dyno sheet reports as compared to a benchmark standard temperature (I think 72 degrees F) at sea level. If you make your run on a very hot day, or at a crazy altitude, you'll have a correction that scales your numbers up to what they would have been if the temperature and pressure were ideal.

Using SAE corrected numbers with forced induction motors is often considered cheating, though, since they will up the boost in order to make their required power regardless of ambient pressure. Therefore the sea-level correction should not be applied.

[MsRN]

FYI, "corrected" power is a SAE scaling factor to normalize all dyno sheet reports as compared to a benchmark standard temperature (I think 72 degrees F) at sea level. If you make your run on a very hot day, or at a crazy altitude, you'll have a correction that scales your numbers up to what they would have been if the temperature and pressure were ideal.

Using SAE corrected numbers with forced induction motors is often considered cheating, though, since they will up the boost in order to make their required power regardless of ambient pressure. Therefore the sea-level correction should not be applied.

Interesting...thanks, Kevin (it IS Kevin, I hope?)!

Since my S/C has a boost of 8psi, wouldn't it work better at 72F and sea level, than at 110F and 4,000 ft above sea level, assuming maximum boost in both instances? Color me confused...