[themyst]

I hit 18.5 psi on stage 2 today? So has virtually everyone else... I don't get it.

[Proper Motion LLC]

I'm positive it's Stage 2 Aggresive. Could it be that when trying to blend for 94 octane I over did the race gas and blended for like 95 octane?

And because I'd that it reaches it's targets more efficiently and only 15ish PSI was needed?

[Proper Motion LLC]

Originally Posted by themyst

I hit 18.5 psi on stage 2 today? So has virtually everyone else... I don't get it.

I don't know but u can see my 70-120 video above and u can tell that's not Stage 1. It's comparable to your video, maybe a bit faster.

[GoodtoGo]

Took a quick look at the log. WGDC looks to be in a reasonable range and is not maxed out. No major timing drops. Required map boost targets are being hit, maybe 0.25 psi low in the upper RPMS. Overall looks good. Somebody, tell me if I am missing something.

[riceygts]

Maybe the open hood and cold temperatures contributed to the low boost figures? Have you tried to log the boost under normal driving conditions?

[tibra1]

Originally Posted by themyst

I hit 18.5 psi on stage 2 today? So has virtually everyone else... I don't get it.

Are you runnin stg 2+ aggresive..i wonder why hes only hit 15psi

It would make sense if the torque targets are hit and the weather is cooler..but u seem to always be consistent at 18ish..

[Brey335i]

I've been at 18 something in a range from 98 -> 56 degrees

[tibra1]

Is it possible he has a minor boost leak somewhere..DVs or CP..not sure if minor leaks would trip codes..or could it be the OP is just not getting "on it"..puzzler

[Bash]

Its simple, he sent the wrong log or an older one.
There is no way he is hitting 390 whp with that kind of boost and timing only seeing 9 degrees at max, whereas S2 is believed to be upto 12 degrees, and max boost of 18psi.
These are wrong logs for sure.

[enrita]

Originally Posted by Bash

Its simple, he sent the wrong log or an older one.
There is no way he is hitting 390 whp with that kind of boost and timing only seeing 9 degrees at max, whereas S2 is believed to be upto 12 degrees, and max boost of 18psi.
These are wrong logs for sure.

i agree those looks like stage 1 logs

[Proper Motion LLC]

Straight from Cobb.

"Those HP numbers look really good! The BMW power system is load based, not boost based. Therefore, if the dyno has a low load, your car would know it doesn't need to make 17+ pounds of boost to make the same power it would need under a higher load.

First, you can check your map by going to Tune and show current map. Secondly, when you drive on the road, what kind of boost levels do you see?"

The MD Automotive Dyno us a pretty high reading Dyno I've heard. Bone stock M3's Dyno around 375whp there.

So maybe it is a low load Dyno?

Anyway I'll datalog some WOT runs on the street. Currently my AP still says I'm on Stage 2+ Aggresive.

[themyst]

Perfect explanation. To compare, look at a piggy dyno plot on a mustang dyno. It's not quite as pretty.

Dynojets are inertia based dynos, mustang and dynodynamic types are load based.

[TurboBullett@Ambient Thermal Management]

Originally Posted by Rysandro

Straight from Cobb.

"Those HP numbers look really good! The BMW power system is load based, not boost based. Therefore, if the dyno has a low load, your car would know it doesn't need to make 17+ pounds of boost to make the same power it would need under a higher load.

First, you can check your map by going to Tune and show current map. Secondly, when you drive on the road, what kind of boost levels do you see?"

The MD Automotive Dyno us a pretty high reading Dyno I've heard. Bone stock M3's Dyno around 375whp there.

So maybe it is a low load Dyno?

Anyway I'll datalog some WOT runs on the street. Currently my AP still says I'm on Stage 2+ Aggresive.

I said the same thing in another thread regarding your dyno, dynojets usually don't load a turbo car up as much as a mustang dyno!

[nitehawk]

You can also try using the virtual dyno feature on Cobb. See how that stacks up since it is done on actual road conditions...

[enrita]

Originally Posted by Rysandro

Straight from Cobb.

"Those HP numbers look really good! The BMW power system is load based, not boost based. Therefore, if the dyno has a low load, your car would know it doesn't need to make 17+ pounds of boost to make the same power it would need under a higher load.

First, you can check your map by going to Tune and show current map. Secondly, when you drive on the road, what kind of boost levels do you see?"

The MD Automotive Dyno us a pretty high reading Dyno I've heard. Bone stock M3's Dyno around 375whp there.

So maybe it is a low load Dyno?

Anyway I'll datalog some WOT runs on the street. Currently my AP still says I'm on Stage 2+ Aggresive.

now that i think about it when i was running GIAC in the winter i was boosting 14.5 psi (got 370 whp out of an hybrid mustang dyno stage 3 with pump gas and stock turbos) . in the summer it used to boost around 16.5 peak.

[PlutoniumTans]

Ok we need some mustang dynos then

[Proper Motion LLC]

Originally Posted by PlutoniumTans

Ok we need some mustang dynos then

I'm still due a free Dyno from Cobb So Cal

But I believe they are currently working on putting it underground.

When it's done I'll hit them up, shouldn't be too long now.

[Jeff@TopGearSolutions]

Originally Posted by Rysandro

Straight from Cobb.

"Those HP numbers look really good! The BMW power system is load based, not boost based. Therefore, if the dyno has a low load, your car would know it doesn't need to make 17+ pounds of boost to make the same power it would need under a higher load.

First, you can check your map by going to Tune and show current map. Secondly, when you drive on the road, what kind of boost levels do you see?"

The MD Automotive Dyno us a pretty high reading Dyno I've heard. Bone stock M3's Dyno around 375whp there.

So maybe it is a low load Dyno?

Anyway I'll datalog some WOT runs on the street. Currently my AP still says I'm on Stage 2+ Aggresive.

Which is why we said from the beginning, with no baseline we cant tell if its good or bad

If the car feels good dont sweat it. That's what matters at the end of the day right?

[ar design]

Originally Posted by Brey335i

I've been at 18 something in a range from 98 -> 56 degrees

On stock turbos?

[Brey335i]

Originally Posted by ar design

On stock turbos?

Yeah. Cobb Stage 2+ runs around 18.5-18.7 for most members that have logged their boost I believe.

[OpenFlash]

Originally Posted by Rysandro

Straight from Cobb.

"Those HP numbers look really good! The BMW power system is load based, not boost based. Therefore, if the dyno has a low load, your car would know it doesn't need to make 17+ pounds of boost to make the same power it would need under a higher load.

First, you can check your map by going to Tune and show current map. Secondly, when you drive on the road, what kind of boost levels do you see?"

The MD Automotive Dyno us a pretty high reading Dyno I've heard. Bone stock M3's Dyno around 375whp there.

So maybe it is a low load Dyno?

Anyway I'll datalog some WOT runs on the street. Currently my AP still says I'm on Stage 2+ Aggresive.

I've heard that the dyno reads high due to a miscalibrated baro pressure sensor. This explains the unreasonably high STD/SAE corrected numbers I've usually seen from that dyno. Despite it being at sea level and in usually temperate conditions, you will routinely see CFs in the 1.04-1.06 range. This is why we have all seen unnaturally high dyno results there. Not sure if the baro sensor has been replaced. And I'm basing this all on 2nd hand info. So take with a grain of salt.

Shiv

[Zeph]

Originally Posted by Rysandro

I'm positive it's Stage 2 Aggresive. Could it be that when trying to blend for 94 octane I over did the race gas and blended for like 95 octane?

And because I'd that it reaches it's targets more efficiently and only 15ish PSI was needed?

Nah, I have put in 100 octane (5 gallons) blended with about 1/2 a tank of 93 octane and still hitting over 18psi of boost.