[FotiosF90M5]

Post your observations of using the jb3 daily. Just the things you notice while your driving that you say to yourself.Whenever a complaint that you have or a compliment here is the place to post it.
I have noticed that I have to floor it a lot more to get the power I want.I sometimes wish it had a little more low end grunt.Up high it screams. Around town driving is much smoother. Also after the third day adaptation seemed to get more complete. My car is running very strong right now.I am running 93 octane with a bmc drop in only.

[FotiosF90M5]

I hope BMS introduces a map to boost up low end power. that would make me happy.

[Mid_West]

Slightly off topic...but that is one of the reasons my Xede is sitting in my closet right now. I would never use DS because it was WAY too jerky (on/off effect). Although I think that with what Im reading about JB3, future maps could probably be created that incorporate more throttle response at lower RPMs.

BTW, Im getting REALLY close to pulling the trigger

[FotiosF90M5]

It makes driving the 335i so much more enjoyable and smooth, but when you want power it gives you so much of it.very fast car.

[down4it]

Originally Posted by fotios330i

I hope BMS introduces a map to boost up low end power. that would make me happy.

soon there will be lots and lots of map options...

[FotiosF90M5]

Originally Posted by down4it

soon there will be lots and lots of map options...

cool, thats what I was hoping.

[Jet335i]

I installed mine yesterday and took it for a 30 mile drive.

My first impression was the same as the OP...down low I noticed no real difference...maybe a slight increase in punch but nothing that made me think the JB3 was "oh my god" amazing.

However, once I got on a nice long stretch i slowed down for a bit, put it into M2, and floored it and holy crap...the power is definitely there. It's not a kick in the pants feeling of power, but a gradual increase and before you know it you're in m5 and going 120 in a 45mph zone and everything is flying by.

Once again, same as the OP, I wish there was more grunt on the low end to really make you feel the power without going WOT - hopefully there will be a map in the future to address this!

For anyone's reference, I come from a modded stage 4 evo, which was like driving a kia until you hit 3Krpm then you were literally thrown back in your seat...I was hoping for a bit of that feeling from the JB3 - but instead, as many other people have stated, it had a "factory" feel to the power, which isn't necessarily a bad thing.

cliff notes: fantastic power up top, but wishing for more low end feeling without going WOT - and gas consumption from going WOT all the time is a bit of a bummer, but I'll just have to live with it I'm stock except for the JB3 on 93oct. only - overall thumbs up!

[FotiosF90M5]

cliff notes: fantastic power up top, but wishing for more low end feeling without going WOT - and gas consumption from going WOT all the time is a bit of a bummer, but I'll just have to live with it I'm stock except for the JB3 on 93oct. only - overall thumbs up![/QUOTE]

Thats one of my biggest gripes. I'm going WOT a lot more than before because the modest low end torque.

[FotiosF90M5]

I'd love to hear other peoples experiences with they're jb3's so Im going to bump this.

[GGreek5]

Smooth power delivery. Unbelievably smooth. No complaints here, except for a higher boost map.

[RiXst3r]

Originally Posted by fotios330i

Thats one of my biggest gripes. I'm going WOT a lot more than before because the modest low end torque.

On a stock car, when you go half throttle, if you monitor OBDII, you will see that it actually goes full throttle, and builds full boost for a second, to make the car feel as if you have more low end tq... this is fine at stock boost levels, but up the boost, and this becomes tire squeeling tq at half throttle... hence the need for throttle posistion based boost control.

with the jb3, the throttle is more linear, if you want the extra tq, you gotta give the extra throttle... personally, I love this extra level of control... allows you to drive much more civilized when needed.

Smooth is good

-Rick

[E82tt6]

Originally Posted by RiXst3r

On a stock car, when you go half throttle, if you monitor OBDII, you will see that it actually goes full throttle, and builds full boost for a second, to make the car feel as if you have more low end tq... this is fine at stock boost levels, but up the boost, and this becomes tire squeeling tq at half throttle... hence the need for throttle posistion based boost control.

with the jb3, the throttle is more linear, if you want the extra tq, you gotta give the extra throttle... personally, I love this extra level of control... allows you to drive much more civilized when needed.

Smooth is good

-Rick

I tend to agree. If you want to make a lot of tire noise through first, floor it off the line and you can feel the low end grunt just fine.

RE01Rs will hover just past the edge of traction all the way up through first and into second. Pretty fun actually, I think they're at just about the ideal amount of wheelspin for optimal grip. I'd imagine stock runflats would be toast, and if power delivery had the same artificial jerkyness as stock, I think tires would be gone FAST.

I feel much more connected and in control with the way the JB3 controls power delivery at part throttle. It reminds me of my Boxster S, just with a lot more go. Nearly the same level of part-throttle precision. Makes it a bit easier to take advantage of the e-lsd for a little tail-out fun also. Much easier to steer with the throttle.

[mmmotornutz]

I agree that it takes more throttle for the JB3 to push the car to it's limits but that makes controlling the car with precision. I prefer that over something that "kicks in" all of sudden. Yes it is fun but isn't fun when road racing. I noticed right away that I would have to rev the motor at a higher rpm to get the same "get out of the hole" feeling compared to my JB1. My temps has not hit 250F. My wife didn't even know I had a chip until she saw my bank statement, and she drives my car. Normal daily driving does not show that the car is chipped or nor...very sleeper. I can't wait for cooler weather to race at the track again and see the difference over the JB1.

[2point3]

I think its great! No real complaints.

[ezatnova]

Originally Posted by E82tt6

I tend to agree. If you want to make a lot of tire noise through first, floor it off the line and you can feel the low end grunt just fine.

RE01Rs will hover just past the edge of traction all the way up through first and into second. Pretty fun actually, I think they're at just about the ideal amount of wheelspin for optimal grip. I'd imagine stock runflats would be toast, and if power delivery had the same artificial jerkyness as stock, I think tires would be gone FAST.

I feel much more connected and in control with the way the JB3 controls power delivery at part throttle. It reminds me of my Boxster S, just with a lot more go. Nearly the same level of part-throttle precision. Makes it a bit easier to take advantage of the e-lsd for a little tail-out fun also. Much easier to steer with the throttle.

Actually, on my brother's car (stock RFTs) I feel that they are just like you say, exactly....hovering on the edge of traction through first and second. My brother's car is 29.2 so maybe that matters. I honestly expected to be able to roast the tires with DTC pressed once. Not happening. Honesly, it IS wonderfully driveable and smooth...and it makes a lot of sense what Rick says about not wanting WOT at half throttle like the stock car does. That would be bad.

I'm guessing it isn't a "dud" JB3. Again, it's 29.2, and a 6MT. I'll say I'm a decent driver for drag testing, and I only mustered 13.45 @ 108.5 (2.1 60 ft, launched fairly tamely at 2500). Also, the abandoned road was mildly uphill the whole way, maybe 5 degrees, so I'm sure that accounted for maybe a half second or so and a couple mph, which I suppose puts me in the sweet spot of high 12's at 112, which makes sense for a fairly soft launch. The other midly disconcerting thing is that I measured at 315 hp, after measuring 274 in stock form. These are with dynolicious, fwiw, which is proven extremely accurate.

Honestly, I think two things in the future will help reassure me that i'm getting the power that should come from the JB3. A boost guage, when Rick's are made in a few weeks. And the switch for the JB3. If I could easily switch from "stock map" to regular JB3 map, and feel them back to back, it might be more convincing as far as power added. That said, I wonder what kind of adaptation time has to take place when flipping the switch between stock and regular jb3 maps?

In short (never having driven a 335 with a tune before), at this point, I'll say the JB3 feels weaker than I expected in first and second gear, and below 3000 rpm in any gear. Above 3000 in third and fourth gears, the car is near stupid-fast and the pull is smile inducing, all while being stock-smooth.

[Jet335i]

Originally Posted by ezatnova

In short (never having driven a 335 with a tune before), at this point, I'll say the JB3 feels weaker than I expected in first and second gear, and below 3000 rpm in any gear. Above 3000 in third and fourth gears, the car is near stupid-fast and the pull is smile inducing, all while being stock-smooth.

my feelings exactly...though punch it into WOT from 3Krpm in second and wind it out till sixth, chances are you close to being on the highway patrol's most wanted list.

[2008_335i_coupe]

I agree with you about the low end torque, to be honest I was kinda disapointed in the power from JB1 to JB3

I went and rechecked all the wires to make sure they were correct and tight..
some were a little loose, so i was hoping that was it..

I am also buying a boost gauge to verify boost, then heading to the track

[A418t81]

Low end torque was intentionally dialed back a bit to help with traction and drivetrain wear and tear, I don't really have a problem with it. 360+ wtq is still plenty. I personally am glad that the throttle is linear to torque production.

I also have no problem with the JB3. Low end tq is marginally improved over the JB2H, but its a HUGE difference over 4k rpm to redline.

[BMW_TT]

No complaints here.

[exidisjon]

Still waiting for mine....Was wondering if this mod is 100% undetectable with the after 03/08 build models.? Want to upgrade my SSTT ASAP with this JB3 and dont wanna lose my warranty.

So far reviews have been too good.. Really looking forward to it.

[camaross305]

I was comming from a jb2hh. I miss the lowend grunt slightly. But after 4000 this thing just keeps pulling where as the jb2hh had a quick jolt of power but then fell on it's face. I never understood what people meant about the jurking on off feeling on a jb2 or other tune, my car is a manual. But I put my old jb2 in my friends auto and omg it was almost annoying it was so jerky and if you just wanted a little more power to pass someone it would rip the tires off. I can see how this feeling could be deceptive. Jb3 ftw

[dadasracecar]

It's astonishing to me that you guys are complaining about a lack of punch below 3K rpm. Loading up a motor at low rpm is the absolute worst thing for it. You want the power to come one when you'll be using it - in this case at high revs. If you want low end torque, buy a diesel.