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post #1 of 14 Old 8th June 2014, 09:57 PM Thread Starter
bwherry
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Another happy Jailbreak Tuning customer (tuning results & video)

Hi guys,

Back on May 5th I brought my car down to Matt & Bobby at Jailbreak Tuning to do some software tuning on the dyno. Previously my car had the Dinan stage two software (along with their intake, exhaust and 3.45 rear differential, all of which it still has). Check out the video:

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.


The first three runs we did were with the Dinan software still intact, to get a baseline. Run three was the strongest of them, with peak horsepower at 327.46 and peak torque at 314.79. (note: these are all SAE corrected numbers) Matt pointed out to me how rich the mixture was above 5250rpm and how "wavy" the lines are, which Matt says is indicative of the knock sensor kicking in all the time. Luckily these are both things that can be fixed with software to produce more power. Then Matt downloaded the Jailbreak software to my ECU and we did some more runs. The horsepower and torque curves immediately jumped up, and the A/F ratio stayed much closer to 13.0. So already a great improvement. But Matt saw some things that could be improved upon - a small change in fueling here, a timing adjustment there, etc. We did a run or two with the MAFs disconnected - made virtually no difference at all. After eleven runs in total we were done.

The results:

Peak horsepower: 327.46 to 342.82
Gain: 15.36

Horsepower @ 6000rpm: 311.06 to 333.11
Gain: 22.05

Peak torque: 314.79 to 330.63
Gain: 15.84

Torque @ 4500rpm: 311.55 to 330.59
Gain: 19.04

Again, all numbers are SAE corrected. Oh, this was with 91 octane (CA) pump gas, by the way. Don't be overly concerned with the absolute numbers - it's more about the differential, as the car wasn't moved from the time the Dinan stage 2 was on there until the Jailbreak tune, using the same dyno on the same day, same outside temperature, etc. It was around 75 degrees F, by the way. Also, the car's air conditioning was on, which could account for a little bit of power loss.

You can see the "waviness" in the run 3 curves, and how much flatter the curves got with the changes (run 11). The air/fuel ratio improvements are also very visible. Just look at that flat torque curve!

Now that I've had this tune in place for a few weeks I can give some overall impressions. The car is just as driveable as before, but it seems more "eager". Just a bit more juice. The idle is smooth. No CES light or codes. And sport mode stays on! I'm a fan.

Matt & Bobby are super nice guys that know what they're doing. I'd definitely recommend their products. Here's their site: Jailbreak Tuning If you're in southern California they may be able to do custom tuning on the dyno for your car like they did for mine, so definitely ask them.

I hope this has been helpful!

Brian
Attached Thumbnails
run_03.png   run_11.png   shows_max_hp_diff.png   shows_max_tq_diff.png  

Brian
Los Angeles, CA
2001 Carbon Black M5, black/red sport interior. PDC, shades, fold-down rear seats.
Dinan intake, Dinan exhaust, Jailbreak Tuning custom, dyno-tuned software, Dinan 3.45 rear differential, Bilstein PSS9 coilovers, Dinan anti-sway bars, Dinan front strut brace, 19" Varrstoen ES1 wheels w/ Sumitomo HTR-Z III tires, Intravee II, Alpine KCA-420i, DICE A/D converter, MkIV nav computer, Angel iBright V3.0, BeastPower rear swaybar brackets, shorty clutch stop, Slimmbones finned rear diffuser, Slimmbones front lower grille w/ 4" inlets
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post #2 of 14 Old 9th June 2014, 03:46 AM
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Those are great results. I have the JB tune and I really like it, especially since they managed to fix a severe case of kangaroo effect on hard acceleration.

Many dyno runs on here have shown the AFR doing that same dive into the mid-11's at high rpm, which always puzzled me since the conventional wisdom for modern engines is to aim for around 13:1. So it is a weight off my mind now your post has confirmed that is what JB aim for.

So why do stock cars go so pig-rich at high rpm? I think it must be to provide detonation margin for cheapskate owners running 87 octane gas.
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post #3 of 14 Old 9th June 2014, 04:12 AM
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Thanks for posting this! Concensus around here and the E60 group is that the Dinan tune is conservative. Will be interesting how much more power Matt can extract from the Unicorn.


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post #4 of 14 Old 9th June 2014, 05:29 AM
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post #5 of 14 Old 9th June 2014, 05:23 PM
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Very nice results and well documented!

2001 BMW e39 M5
Eisenmann Race Exhaust
SS X-Pipe resonator delete
Powerchip Tune
South Bend Stage II Endurance Racing Clutch
CNS Lightened Flywheel

KW Variant 3 Coilover Suspension
RDSport 19" RD2
AC Schnitzer Type II Racing 19x9.5F 19x10.5R

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post #6 of 14 Old 9th June 2014, 06:42 PM
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post #7 of 14 Old 9th June 2014, 08:21 PM
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I too have the Jailbreak Tune, and while I have not had the opportunity to dyno the car and have them tweak it, the Kangaroo effect is eliminated. It is smoother, more responsive, and much more driveable.
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post #8 of 14 Old 10th June 2014, 05:06 AM
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I was trying to find info on their LA shop but couldn't find any, do you have their location or did I just miss it on their site? Great results though! I'm definitely considering them.
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post #9 of 14 Old 10th June 2014, 04:20 PM
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Quote:
Originally Posted by christian900se View Post
I was trying to find info on their LA shop but couldn't find any, do you have their location or did I just miss it on their site? Great results though! I'm definitely considering them.
I would contact Matt directly:

Facebook:
https://www.facebook.com/pages/Jailb...06478759443969

email:
[email protected]

2001 BMW e39 M5
Eisenmann Race Exhaust
SS X-Pipe resonator delete
Powerchip Tune
South Bend Stage II Endurance Racing Clutch
CNS Lightened Flywheel

KW Variant 3 Coilover Suspension
RDSport 19" RD2
AC Schnitzer Type II Racing 19x9.5F 19x10.5R

Latest Photos

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post #10 of 14 Old 16th June 2014, 04:59 AM
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Quote:
Originally Posted by 68FB View Post
Those are great results. I have the JB tune and I really like it, especially since they managed to fix a severe case of kangaroo effect on hard acceleration.

Many dyno runs on here have shown the AFR doing that same dive into the mid-11's at high rpm, which always puzzled me since the conventional wisdom for modern engines is to aim for around 13:1. So it is a weight off my mind now your post has confirmed that is what JB aim for.

So why do stock cars go so pig-rich at high rpm? I think it must be to provide detonation margin for cheapskate owners running 87 octane gas.
They run richer than LBT (leanest best torque) to hold the exhaust gas temps down to protect the head, the valves, the exhaust manifold and the cats. Advancing the timing will also drop EGT.

It is unlikely that the engine would pass an OEM durability sign-off with an AFR of 13:1!
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