[fls328i]

Good Day

I'm sure that some of the members here have tuned their BMW F30 328i to get more power.

I was wondering if anyone has specifically done a Bootmod3 Stage 2 with upgraded IC, DP and Chargepipe) on their car, what sort of WHP did they get (if it was Dynoed) and whether it's reliable. Does it actually feel way faster / like a new car like how everyone says?

Happy for people to share if anyone has also done a Stage 1 stock tune and whether it was still reliable or not?

I heard JB4 is another great option but it's just plug and play and doesn't provide as smooth of a delivery as Bootmod3.

My 328i is now above 100,000 kms and I was wondering if tuning a great option for more power and whether it will still be reliable for its mileage.

Thanks

[rednose]

I've had a JB1 in my wifes for almost 5 years now, installed it a week after I bought it.

Car was an ex-demo and only had 3000klms on it.

Pretty decent gains for $500

View post on imgur.com

[fls328i]

Originally Posted by rednose

I've had a JB1 in my wifes for almost 5 years now, installed it a week after I bought it.

Car was an ex-demo and only had 3000klms on it.

Pretty decent gains for $500

View post on imgur.com

Interesting! Thought it would make more than 146kw at the wheels when it's stock :/

[rednose]

Originally Posted by fls328i

Interesting! Thought it would make more than 146kw at the wheels when it's stock :/

Why?

They are rated at 180kw @ the flywheel

Take away a drive train loss of around 18-20% and its right on the money.

Either way, I never look at what the starting point on a dyno is as they all read different.

I only look at the delta between the 2 runs.

[fls328i]

Originally Posted by rednose

Why?

They are rated at 180kw @ the flywheel

Take away a drive train loss of around 18-20% and its right on the money.

Either way, I never look at what the starting point on a dyno is as they all read different.

I only look at the delta between the 2 runs.

It's just that I heard people saying across the forum that BMW underrate their vehicles, given a higher kw value at the flywheels than the ones they indicated on paper.

There's been some cases of people saying that on their 328i. Guess it's not true / the dynos give unrealistic readings.

[rednose]

Originally Posted by fls328i

It's just that I heard people saying across the forum that BMW underrate their vehicles, given a higher kw value at the flywheels than the ones they indicated on paper.

There's been some cases of people saying that on their 328i. Guess it's not true / the dynos give unrealistic readings.

Some Dyno's do, this particular one I believe is pretty accurate as I've had a few cars tuned there and they have all backed up their power figures at the track.

I haven't raced this one as it's the wife's daily and I don't want to flog it.

My car on the other hand makes 476rwks on that dyno and traps 140MPH

If I was to take it to another shop it may read higher.

I guess what you should take from it is when tuning, the only thing you should care about is the delta between runs after your mods.