[triggz]

I recently replaced my turbos as the car was smoking from the exhaust and LOUD wastegate rattle. However, I would still hear a very slight rattle on deceleration and of course more distinct in parking lots after the new turbos. If I were to rev from a dig, you could hear the rattle every time. Last night I decided to update my firmware and see if the wastegate rattle adjustment actually works. And?!?!? ITS GONE!! No more rattle from a dig, driving, and parking lots! All I hear is pure spool! Even the exhaust sounds better/cleaner. The car feels smoother when shifting and it feels like there is more torque. It definitely pulls harder than before through gears and it just feels much better.

The only thing I noticed is now you can hear the wastegates close when you let off the throttle. It's barely noticeable but much better than a rattle.

Overall, I am very happy with this new firmware!! I didn't get a chance to do any WOT based on the weather conditions.

For those who care, I was running Map2, 94 oct, full bolt ons, no cats, and no meth at the present time.

I want to thank Mike for his help and Terry for always improving the JB4.

[Loco Goose]

oh man

if I can get rid of my wastegate rattle with the new update it would be AMAZING

[PiZauL]

Oh sweet, gonna load it up tonight. I'm about 2 versions behind, last verision didn't really seem to add anything to non-meth cars.

[Mike@N54Tuning.com]

Thanks for the mini review

Here are the new features of the 2/7 firmware..

2/7 Firmware Changes:

1) Revised fuel open loop algorithms to improve fuel trims. If you experience a fuel pump related code reduce fuel open loop mapping in increments of 5. If fuel trims are maxed out you can increase fuel open loop mapping in increments of 5 up to 100.
2) Added non-turbo map 8. It forces a 3100 limp code disabling turbos with 0% wastegate duty cycle. The final version uses CAN commands to suppress the CEL display in dash, but they are not properly working yet, so this firmware simply allows the CEL/SES to display in dash while map 8 is selected. Once you switch away from map 8 you will need to restart the motor to get your boost back.
3) Added fuel trims to logging as default under Exp1. Trims are displayed as -6% to +34% = 0-50. At 34% (50 in the logs) the DME can no longer add additional fuel and you'll start to see your AFR lean out.
4) Adjusted map3 meth auto learning to be more aggressive in reducing target boost when timing drops are observed while under meth flow.
5) If FutureUseD set to 100 water temp is used in place of oil temp for cold engine protection.
6) When on map 3 if using a CPS offset it is transitioned to 0 as a function of meth flow. Note if using map 6 CPS is NOT transitioned to 0.
7) Remapped CPS to include an additional degree of offset in 4th gear and an additional two degrees in 5th gear.
8) Modified interface to automatically restart firmware update in the event of a timeout during updates.
9) Fixed bug w/ startup sweep engaging randomly when JB4 is used on top of flash tunes or with the BT.
10) Adjusted 2step logic. Further changes are coming to accommodate the new MOSFET 2step circuit being tested in house now.
11) Added a "rattle fix" option. To enable set FutureUseD=99. If rattle is not reduced then you require mechanical adjustment or replacement of the wastegate assemblies.
12) Changed in dash gauge option 4 to over/under boost target. Middle is on target, to the left under target, to the right over target.
13) Added support for progressive methanol mapping on top of flash tunes.
14) Revised various interface field names to better reflect how they are used.

Notes for FBO cars w/ CPS who don't have a meth kit and run on pump gas:

1) Map 6 settings shown are intended for FBO CPS cars on 93-94 octane.
2) To use map 6 on 93 octane you must have downpipes and CPS installed.
3) If timing curve shows no drops with map 6 settings you may reduce CPS values by 10 across the board for a slightly more aggressive version.

[G.I.Joe]

I just installed it and enabled RattleFix, however unfortunately it didn't really do anything, but my rattle is REALLY bad, i.e. embarrasing to drive kinda bad Well, I guess I'll have to get some RB's eventually or sell the car, it really is that bad.

I'll have to get back with feedback on how the firmware works when the roads dry up a bit....

[marv85]

Originally Posted by G.I.Joe

I just installed it and enabled RattleFix, however unfortunately it didn't really do anything, but my rattle is REALLY bad, i.e. embarrasing to drive kinda bad Well, I guess I'll have to get some RB's eventually or sell the car, it really is that bad.

I'll have to get back with feedback on how the firmware works when the roads dry up a bit....

You want to try some mechanical adjustment... there is a DYI on this around here

[David1]

What is FBO?

[marv85]

Originally Posted by David1

What is FBO?

Full Bolt on : all bolt ons mods : Downpipes, intercooler, intake, exhaust... etc

[rdub315]

what is CPS?

[marv85]

Originally Posted by rdub

what is CPS?

Crank Position sensor. It enables people running JB4 to offset timing curves... example for people with lower grade fuel...

[bigdaddycane]

Crank Position Sensor

http://www.burgertuning.com/SLD_CPS_Upgrade.html

[triggz]

Originally Posted by G.I.Joe

I just installed it and enabled RattleFix, however unfortunately it didn't really do anything, but my rattle is REALLY bad, i.e. embarrasing to drive kinda bad Well, I guess I'll have to get some RB's eventually or sell the car, it really is that bad.

I'll have to get back with feedback on how the firmware works when the roads dry up a bit....

Did you set FutureUseD to 99???

[i2iSTUDIOS]

Any changes for Tune only Map 5 cars?

[PiZauL]

Just loaded it and gave it a few revs in the garage, and wow rattle is gone. Usually I would hear the rattle mess clean and clear bouncing off the walls. Now I heard just motor. The idle exhaust tone sounds cleaner and more tame, and doesn't gurgle when you let off since the wastegates stay closed for 3 seconds (dunno how I feel about this as I love the gurgle.. But anything to get rid of that rattle). Weather sucks here, will take her out for a spin tomorrow.

[rdub315]

where are you downloading the update from? i can't find it on n54.

[ichi_ban]

So do you just DL the 2/7 firmware, plug in the USB, connect and then click setup on the 2/7 for it to update?

[triggz]

Originally Posted by PiZauL

Just loaded it and gave it a few revs in the garage, and wow rattle is gone. Usually I would hear the rattle mess clean and clear bouncing off the walls. Now I heard just motor. The idle exhaust tone sounds cleaner and more tame, and doesn't gurgle when you let off since the wastegates stay closed for 3 seconds (dunno how I feel about this as I love the gurgle.. But anything to get rid of that rattle). Weather sucks here, will take her out for a spin tomorrow.

Paul, the gurgle is still there. You just have to take it for a spin and let off the gas or downshift.

For the guys asking about the firmware.

You download it off n54tech, go to forced induction, first sticky, first post, scroll to the bottom of Terrys first post and ull see the hex file n54_o2o72012_alpha and once loaded, make sure you go to user adjustments and set futureuseD to 99 and hit save. Done.

[ichi_ban]

What I'm trying to understand is how do you upload the 2/7?

[triggz]

Originally Posted by TeamSoloE93

What I'm trying to understand is how do you upload the 2/7?

Go to n54tech. All the instructions are there.

[ichi_ban]

I've been reading it and still don't see it. I'll just wait for Mike to reply to my PM. I just don't want to mess anything up. My apologies for being a newb.

[marv85]

Originally Posted by TeamSoloE93

I've been reading it and still don't see it. I'll just wait for Mike to reply to my PM. I just don't want to mess anything up. My apologies for being a newb.

You download the HEX file attached on the bottom of the first post (the thread is a sticky, can't miss it).
then you connect your laptop to the JB4, and then click upload firmware form the drop down menu. Choose the HEX file and then wait... thats it

[Mike@N54Tuning.com]

Originally Posted by marv85

You download the HEX file attached on the bottom of the first post (the thread is a sticky, can't miss it).
then you connect your laptop to the JB4, and then click upload firmware form the drop down menu. Choose the HEX file and then wait... thats it

Exactly.

You also need to enter and save the new settings. They have pretty clear directions linked in the same post as the firmware/interface/settings.

Mike