GIAC Stage 1 boost graph

enrita · 09-04-2009, 04:12 PM

Was doing some BT logs so i thought why not sharing my low boost

Big thanks to Prince ///M for making the graph !

blisstik · 09-04-2009, 04:26 PM

Thanks for sharing =D

Why does it drop around 2 PSI @ 5K? I mean that drop is instant!?

enrita · 09-04-2009, 04:29 PM

Apparently with catless dps stage 1 goes in overboosting and therefore there is a drop.

cstmx_ryder · 09-04-2009, 06:14 PM

Quote:

Originally Posted by enrita

Apparently with catless dps stage 1 goes in overboosting and therefore there is a drop.

Is that bad? So I'm assuming that this won't happen with the appropriate tune for the mods.

Kinda like running stg1 on PROcede when you're fully catless, when you should be running stg3.

Maybe it's more beneficial for those who are heavily modded to wait till stage 2+ comes out on GIAC, which is what I'm waiting for.......

Mr. 5 · 09-04-2009, 08:48 PM

Quote:

Originally Posted by enrita

Apparently with catless dps stage 1 goes in overboosting and therefore there is a drop.

Maybe that was happening at the dynojet as well.

stressdoc · 09-04-2009, 08:50 PM

That looks like the 5k waffle to me. Very interesting, would very much like to know what is causing that cut-off.

scalbert · 09-04-2009, 09:34 PM

What is interesting is the target precedes the actual.

On my B5 S4 GIAC, I would get a similar issue but only at the onset of throttle opening.

Borsig · 09-04-2009, 10:44 PM

thats the kind of shit that will jerk you arund in your car and make it buck like a mechanical bull...

Trust me - I know.... It sucks

Mr. 5 · 09-05-2009, 12:08 AM

Here is my boost log from one of the runs that I did during the video.

Borsig · 09-05-2009, 04:57 AM

that looks...... well, bad.

scalbert · 09-05-2009, 07:27 AM

Quote:

Originally Posted by Mr. 5

Here is my boost log from one of the runs that I did during the video.

Can you rescale to PSI for easier referencing? But otherwise, that looks correct and thanks.

Mr. 5 · 09-05-2009, 09:23 AM

Quote:

Originally Posted by Borsig

that looks...... well, bad.

If you're talking about mine, I don't understand why you think that.
Remember that the peaks and valleys were when I shifted.

Quote:

Originally Posted by scalbert

Can you rescale to PSI for easier referencing? But otherwise, that looks correct and thanks.

I'll see what I can do to re-scale.
How do you get the actual PSI from the BT outputs? Because I know for a fact that I'm not getting 18-19 psi.
Thanks.

enrita · 09-05-2009, 09:31 AM

Quote:

Originally Posted by Mr. 5

If you're talking about mine, I don't understand why you think that.
Remember that the peaks and valleys were when I shifted.

think he was referring to mine Mr.5 . Maybe Borsig can go a big deeper on his comment so that i can understand why. I post this stuff to learn from other members and understand how the tune work.

Borsig · 09-05-2009, 10:58 AM

No no, my bad guys...

I was thinking that Mr.5's graph was from a single gear pull, not one where he shifted.

scalbert · 09-05-2009, 11:02 AM

Quote:

Originally Posted by Mr. 5

I'll see what I can do to re-scale.
How do you get the actual PSI from the BT outputs? Because I know for a fact that I'm not getting 18-19 psi.
Thanks.

Create a new column in Excel and use the following formula:

=(A1-10)/10*14.5

But replace the A1 with the appropriate cell for the pressure in front of throttle. Then copy and paste to the rest of the rows.

Mr. 5 · 09-05-2009, 04:51 PM

Quote:

Originally Posted by scalbert

Create a new column in Excel and use the following formula:

=(A1-10)/10*14.5

But replace the A1 with the appropriate cell for the pressure in front of throttle. Then copy and paste to the rest of the rows.

Thanks for that equation Scalbert! I've always wondered how to determine the actual PSI based on the BT logs.
Here's the same graph but I put things into better perspective using your equation.

I started in 2nd gear at 40mph, then went to 3rd and ended in 4th.
GIAC states that the reason why actual boost is higher than specified is due to running the stage 1 tune on a stage 2 car. I'm slightly overboosting but this should be taken care of in a couple weeks.

cstavaru · 09-05-2009, 04:57 PM

There is that strange boost oscillation around 5200RPM, it occurs in all graphs. And Mr. 5 graph is not on the dyno, its on the road. Can't be said that it is the dyno's fault because the software is tuned for the road...

TreDirtyFive · 09-05-2009, 05:09 PM

Quote:

Originally Posted by cstavaru

There is that strange boost oscillation around 5200RPM, it occurs in all graphs. And Mr. 5 graph is not on the dyno, its on the road. Can't be said that it is the dyno's fault because the software is tuned for the road...

Not on relatively stock cars with a catback only or less.

enrita · 09-05-2009, 05:33 PM

We are all too tuned for stage 1. would be nice to hava a member with stock car and stage 1.
I am sure the issue on our cars will be resolved with stage 2 or higher.

Mr. 5 · 09-05-2009, 06:11 PM

Quote:

Originally Posted by enrita

We are all too tuned for stage 1. would be nice to hava a member with stock car and stage 1.
I am sure the issue on our cars will be resolved with stage 2 or higher.

Agree. I was warned before I got the flash that my car might not run perfect since my car is stage 2 running a stage 1 tune, but if this isn't considered perfect, I'm really looking forward to what they consider perfect.

enrita · 09-05-2009, 06:19 PM

Quote:

Originally Posted by Mr. 5

Agree. I was warned before I got the flash that my car might not run perfect since my car is stage 2 running a stage 1 tune, but if this isn't considered perfect, I'm really looking forward to what they consider perfect.

! While i am waiting i am going to test and stack a jb+ on top of Giac pushing 1 extra Psi 

Mr. 5 · 09-05-2009, 07:16 PM

Quote:

Originally Posted by enrita

! While i am waiting i am going to test and stack a jb+ on top of Giac pushing 1 extra Psi 

Be carefull man.
Tomorrow, I'm meeting up with a manual trans JB3 with the same mods installed. I couldn't find an MT procede.

09-04-2009, 04:12 PM	#1
enrita Major General 159 Rep 7,378 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	GIAC Stage 1 boost graph - WOT 3rd Was doing some BT logs so i thought why not sharing my low boost Big thanks to Prince ///M for making the graph ! Attached Images __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade Last edited by enrita; 09-04-2009 at 05:18 PM..
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09-04-2009, 04:26 PM	#2
blisstik Lieutenant Colonel 151 Rep 1,677 Posts Drives: E92 Join Date: Jul 2009 Location: California iTrader: (14)	Thanks for sharing =D Why does it drop around 2 PSI @ 5K? I mean that drop is instant!?
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09-04-2009, 04:29 PM	#3
enrita Major General 159 Rep 7,378 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	Apparently with catless dps stage 1 goes in overboosting and therefore there is a drop. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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09-04-2009, 08:50 PM	#6
stressdoc Moderator 617 Rep 10,855 Posts Drives: BMW i8; Toy 4runner TRD pro Join Date: Jun 2005 Location: Waco TX iTrader: (0)	That looks like the 5k waffle to me. Very interesting, would very much like to know what is causing that cut-off. __________________ My recent ED photos: http://f80.bimmerpost.com/forums/sho....php?t=1026808 my not-so-recent ED: http://www.e90post.com/forums/showthread.php?t=31829 Please join BMWCCA http://bmwcca.org/index.php?pageid=c...&ref_by=300279
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09-04-2009, 09:34 PM	#7
scalbert Major General 153 Rep 5,780 Posts Drives: '13 S4, '15 Q7 Join Date: Feb 2007 Location: Woodstock, GA iTrader: (8)	What is interesting is the target precedes the actual. On my B5 S4 GIAC, I would get a similar issue but only at the onset of throttle opening.
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09-04-2009, 10:44 PM	#8
Borsig Captain 52 Rep 883 Posts Drives: '09 335i ///M-Sport Join Date: Dec 2008 Location: NC iTrader: (3)	thats the kind of shit that will jerk you arund in your car and make it buck like a mechanical bull... Trust me - I know.... It sucks
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09-05-2009, 12:08 AM	#9
Mr. 5 Modder Raider 753 Rep 8,633 Posts Drives: M3 Join Date: Apr 2007 Location: Surf City, HB iTrader: (31) Garage List 2007 e90 335i [8.00]	Here is my boost log from one of the runs that I did during the video. Attached Images __________________ e36 M3 Coupe, e36 325i Sedan e90 335i--SOLD Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
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09-05-2009, 04:57 AM	#10
Borsig Captain 52 Rep 883 Posts Drives: '09 335i ///M-Sport Join Date: Dec 2008 Location: NC iTrader: (3)	that looks...... well, bad.
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09-05-2009, 10:58 AM	#14
Borsig Captain 52 Rep 883 Posts Drives: '09 335i ///M-Sport Join Date: Dec 2008 Location: NC iTrader: (3)	No no, my bad guys... I was thinking that Mr.5's graph was from a single gear pull, not one where he shifted.
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09-05-2009, 04:57 PM	#17
cstavaru Brigadier General 311 Rep 3,262 Posts Drives: 2009 335i M Sport Sedan 6MT Join Date: Aug 2008 Location: Bucharest, Romania iTrader: (0)	There is that strange boost oscillation around 5200RPM, it occurs in all graphs. And Mr. 5 graph is not on the dyno, its on the road. Can't be said that it is the dyno's fault because the software is tuned for the road... __________________ Mods(click): Cobb + RB Turbos \| Aquamist HFS-4 Meth \| Drexler LSD \| Bilstein B12 Pro-Kit \| Custom K&N Apollo Intake \| Wagner Intercooler \| Macht Schnell Downpipes \| BMW Performance Power Kit \| BMW Performance Exhaust \| BMW Performance Short Shifter \| M3 Subframe Bushings \|
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09-05-2009, 05:33 PM	#19
enrita Major General 159 Rep 7,378 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	We are all too tuned for stage 1. would be nice to hava a member with stock car and stage 1. I am sure the issue on our cars will be resolved with stage 2 or higher. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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