[F32]

All this talk about boost figures...how much boost is actually held to redline? 18.5 or 20 PSI or whatever is nice, but it means nothing if it's fading to half that near redline. All that torque doesn't help if it's not in the rev-range where you spend all your time at WOT. What's it running between 6000 and 7000 RPM...14 PSI?

But I'm a little jaded. I only used to run 10 PSI a car ago, set to come on gradually and creep to 11 PSI all the way to 7000 RPM...on nothing but 91 octane. That's what a proper boost-control system gets you.

[F32]

Originally Posted by Sedan_Clan

Okay, now I see. I've seen the two terms used interchangeably, hence my confusion. Thanks man!

Then they were a noob LOL. Downpipe is standard terminology across the board, but I've only heard "chargepipe" in the context of BMWs.

[Sedan_Clan]

Originally Posted by F32

Then they were a noob LOL. Downpipe is standard terminology across the board, but I've only heard "chargepipe" in the context of BMWs.

I never heard of "charge pipe" until BMW's as well. I've always just called it intercooler piping.

[mikew2069]

Originally Posted by Sedan_Clan

I never heard of "chargepipe" until BMW's as well. I've always just called it intercooler piping.

There's an upper and lower IC pipe. Maybe that's where the confusion came in?

[shivaswrath]

Great #'s, although I don't see how this is useable outside of the strip or stop light drag racing.

That amount of boost on a track would result in limp mode in literally a few laps...

[Sedan_Clan]

Originally Posted by shivaswrath

Great #'s, although I don't see how this is useable outside of the strip or stop light drag racing.

That amount of boost on a track would result in limp mode in literally a few laps...

It'll be interesting to see how the M3 addresses limp mode issues. Obviously it has been track tested and R&D'd, so I'm looking forward to seeing how the F80/82 tracks when in customer's hands.

[verbs]

Originally Posted by DurimOne54

Friend of mine hit the dyno the other day. He is not on the forums but I decided to post this up for him. I am blown away by the results! Guess he wasn't lying when he said he breaks traction at 80mph.


ZF 8spd

Mods:
M performance Axle back
Downpipe
AFE Intake
BMS Chargepipe
JB4 (Map 7) 20psi
Flex Fuel wires
Running e50/50% 93 octane




396whp/472wtq

what are his corrected numbers? If he dynoed in cold air those numbers will be skewed.

[utenigma]

Originally Posted by F32

Dyno pulls are supposed to be done in the car's 1:1 gear (or closest to), which in the F30's automatic is 6th.

This is generally correct, but you cannot dyno an F30 in 6th - it reaches the ECU imposed speed limiter before reaching redline

7000 RPM in 6th with the 8AT is 170mph

Most BMW's are this way - geared too high by the rear end to dyno with the transmission at a 1:1 ratio

Generally you dyno BMW's in 4th for a manual, and 5th for an 8AT

If you're having a problem with the kick-down in the automatic, hold down the DSC button until it displays DSC OFF, slide the transmission stick to the left for sport then manually shift through the gears - when you get to 5th, floor it (through the kick-down) it will not shift down, and will not shift up when you redline

This will also prevent the DME from cutting throttle if the wheels slip a little

[M-terkait]

Originally Posted by DurimOne54

Friend of mine hit the dyno the other day. He is not on the forums but I decided to post this up for him. I am blown away by the results! Guess he wasn't lying when he said he breaks traction at 80mph.


ZF 8spd

Mods:
M performance Axle back
Downpipe
AFE Intake
BMS Chargepipe
JB4 (Map 7) 20psi
Flex Fuel wires
Running e50/50% 93 octane




396whp/472wtq

can you list each run with which map/mods?

[shivaswrath]

Originally Posted by Sedan_Clan

It'll be interesting to see how the M3 addresses limp mode issues. Obviously it has been track tested and R&D'd, so I'm looking forward to seeing how the F80/82 tracks when in customer's hands.

They've already been proactive: air to water intercooler will immensely help, and I'm assuming double oil intercoolers will be standard (and probably larger than the M Sport ones)...it won't have issues with heat soak, they built in with the Ring in mind.

[Nickf10]

Thats the gear i dynoed in 5th.. But everyone seems to act like they know what they are talking about. And that day was warm it was 60 degrees out. And car was getting heat soak!

[435iaffair]

get the car to the track when the temp warms up and see what it runs/traps

if the average trap speed backs up the dyno numbers then that's really good news for the n55 cars

[ands]

Are the N55's in the E90 hitting this much hp/tq?

[eyim1988]

Originally Posted by ands

Are the N55's in the E90 hitting this much hp/tq?

yes

[tdizzle]

Originally Posted by Nickf30

Thats the gear i dynoed in 5th.. But everyone seems to act like they know what they are talking about. And that day was warm it was 60 degrees out. And car was getting heat soak!

Couldn't run it in 6th to redline anyway without hitting the speed limiter...