[AmooManiak]

Hi Guys,

Just purchased a 550i and I'm thinking about getting a JB4. How reliable have your cars been? I understand there are two stages. Are there any known/common issues after installing the modules?

[paul223]

We don't know. You should try it and let us know after 10k miles.

[SLVSRFR]

I've been running stage 2 for almost 40k on aggressive mode with no issues.

[AmooManiak]

Cool, thanks. I had a tuned Audi and I've never had any issues. I know the N63 are not considered very reliable, or at least without the CCP, so I'm wondering if adding a tune/piggy back would cause any issues in the long run.

[550Reasons]

Ive had stage 1 for about 35k miles / 2 years and no issues really, I drive it fairly hard.
I will say this tho, without the tune the car is very smooth and luxury feeling, but with the tune it gets a bit rough.

[Pimpsy]

Originally Posted by 550Reasons

I will say this tho, without the tune the car is very smooth and luxury feeling, but with the tune it gets a bit rough.

Agree. Shifts are much more abrupt with the tune.

I drive mine very hard and also never had a problem.

(Get the Sprint Booster!)

[mike@x-ph.com]

Originally Posted by AmooManiak

Hi Guys,

Just purchased a 550i and I'm thinking about getting a JB4. How reliable have your cars been? I understand there are two stages. Are there any known/common issues after installing the modules?

Jb4 is our most poplar ... You wont know what you are missing unless you give it a try

We and other vendors offer 14 days money back guarantee if you are interested in grabbing one

[MattPro]

35k+ here on S2, @ ~75k miles currently. ~1k-3k on the new JB4 beta w/ E30 mix. Very happy!

[badblack550xi]

Originally Posted by MattPro

35k+ here on S2, @ ~75k miles currently. ~1k-3k on the new JB4 beta w/ E30 mix. Very happy!

how is that JB4 beta going ?

[MattPro]

Originally Posted by badblack550xi

how is that JB4 beta going ?

Good, but definitely a beta. There's a couple of things are that annoying. With the temps outside lately my IATs are too high during the day so it sets the boost target on the low side (15-16 psi). At night, I'm seeing 19psi targets and I overboost hitting 21psi and throttle is cut. It's annoying to have the car be much faster at night but I guess that's the nature of piggybacks. Besides this minor annoyance it has been reliable and definitely much more power.

[badblack550xi]

Originally Posted by MattPro

Good, but definitely a beta. There's a couple of things are that annoying. With the temps outside lately my IATs are too high during the day so it sets the boost target on the low side (15-16 psi). At night, I'm seeing 19psi targets and I overboost hitting 21psi and throttle is cut. It's annoying to have the car be much faster at night but I guess that's the nature of piggybacks. Besides this minor annoyance it has been reliable and definitely much more power.

you should do the low temp thermostat, you can buy the ones M5 guys use 90degrees or the ones i sell 84 degrees. Maybe that will help with day time boost.

[AmooManiak]

So, I got the JB4, but also need to drive 1000 miles and 30 days for the warranty to kick in. Should I wait before installing? Hmmm, decisions, decisions....

[mike@x-ph.com]

Originally Posted by AmooManiak

So, I got the JB4, but also need to drive 1000 miles and 30 days for the warranty to kick in. Should I wait before installing? Hmmm, decisions, decisions....

I would install it asap and enjoy the extra power

[AmooManiak]

Alright, so I caved in and installed it this morning. The additional power is worth every penny! What I like is how smooth the power delivery is, it feels like a stock car with more power - very natural. So far I've only ran Map 2.

A couple of things I noticed:

1. The engine seems to have woken up! Now I can actually hear the V8 under the hood. Very nice!
2. There seems to be a ticking (diesel like) sound. Maybe this was there before, just not as noticeable? You can usually hear it in the lower revs when you just barely step on the gas. Is this normal?

[mragarg]

Originally Posted by AmooManiak

Alright, so I caved in and installed it this morning. The additional power is worth every penny! What I like is how smooth the power delivery is, it feels like a stock car with more power - very natural. So far I've only ran Map 2.

A couple of things I noticed:

1. The engine seems to have woken up! Now I can actually hear the V8 under the hood. Very nice!
2. There seems to be a ticking (diesel like) sound. Maybe this was there before, just not as noticeable? You can usually hear it in the lower revs when you just barely step on the gas. Is this normal?

I hear ticking and I don't have JB4, I believe it's the direct injection sound

[mike@x-ph.com]

Originally Posted by AmooManiak

Alright, so I caved in and installed it this morning. The additional power is worth every penny! What I like is how smooth the power delivery is, it feels like a stock car with more power - very natural. So far I've only ran Map 2.

A couple of things I noticed:

1. The engine seems to have woken up! Now I can actually hear the V8 under the hood. Very nice!
2. There seems to be a ticking (diesel like) sound. Maybe this was there before, just not as noticeable? You can usually hear it in the lower revs when you just barely step on the gas. Is this normal?

Nice, glad you are enjoying the extra power!

Originally Posted by mragarg

I hear ticking and I don't have JB4, I believe it's the direct injection sound

+1 its the direct injection

[bin01123]

This is good to know.