[WolfeS2K]

Hey Guys,

My girlfriend just picked up an N54 E90 Msport. I want to do a tune and catless dp's.

Here is the catch.....I don't want her to know what I'm doing. I just want to see her reaction once she drives it. I just want to make sure that if I do the dp's and leave the rest of the exhaust stock- the smell won't be that bad? I know smell is subjective but I just want to get an overall opinion.

Do you know what the average gain on what the car will be with the dp's before and after a tune? I just want to make sure that the gain will outweigh the smell- if there is one!

Thanks!

[akotten]

If the secondary cats are left in, like you plan to, the smell shouldn't be too bad. Same setup I have.

[taylors335]

smell not bad at all gains are roughly 25hp

[M3_Dylan]

Man your a good boyfriend... The only time I'm spending money in someone else's car is wifey

[WolfeS2K]

Thanks guys. So u pick up roughly 25hp with a tune and catless dp's vs a tune alone. That is huge!

[Markyd83]

You will get 60-80 with tune alone.

[WolfeS2K]

Originally Posted by Markyd83

You will get 60-80 with tune alone.

That is what I was told
I just wanted to make sure going the catless route would be worth it

[E90Company]

While you are at it, throw in a BMS DCI intake for $95

[ihc95]

Originally Posted by E90Company

While you are at it, throw in a BMS DCI intake for $95

But if she opens the hood it kind of spoils the stealthiness. Get a BMS drop in she'll never know.

[Beemw335]

Who paid for the car?
I dont know if most girls would be happy with mods that could void the warranty and potentially damage the car if it isnt properly maintained.
How many girls are gonna wait for the cars oil to warm up before flooring it to pass somebody or properly maintaining the car...a stock car is no prob but with the extra boost, you gotta be a little more careful.
Now if it was a girlfriend modding a guys car its completely different...I dont know how ur gf is so you would know its shes into it or not, but personaly Id make sure she wants mods before putting them on.

[Pete Schweaty]

Originally Posted by Beemw335

Who paid for the car?
I dont know if most girls would be happy with mods that could void the warranty and potentially damage the car if it isnt properly maintained.
How many girls are gonna wait for the cars oil to warm up before flooring it to pass somebody or properly maintaining the car...a stock car is no prob but with the extra boost, you gotta be a little more careful.
Now if it was a girlfriend modding a guys car its completely different...I dont know how ur gf is so you would know its shes into it or not, but personaly Id make sure she wants mods before putting them on.

Get a JB4. It Runs stock boost till the oil is warmed to operating temps.

[Beemw335]

Originally Posted by Pete Schweaty

Get a JB4. It Runs stock boost till the oil is warmed to operating temps.

Im pretty sure If you log a jb4, youd see it runs more boost than stock when cold.
Not as much as when warmed up, but still more than the stock tune will.
Atleast thats how the procede is, Im assuming jb4 is the same.

[GhostyM]

Originally Posted by WolfeS2K

That is what I was told
I just wanted to make sure going the catless route would be worth it

And run E85 for another 30-40hp
70/30 mix

[GhostyM]

Originally Posted by Beemw335

Im pretty sure If you log a jb4, youd see it runs more boost than stock when cold.
Not as much as when warmed up, but still more than the stock tune will.
Atleast thats how the procede is, Im assuming jb4 is the same.

Not true. JB4 has a built in safety running stock from <160 and >280 Fahrenheit

[Pete Schweaty]

Originally Posted by Beemw335

Im pretty sure If you log a jb4, youd see it runs more boost than stock when cold.
Not as much as when warmed up, but still more than the stock tune will.
Atleast thats how the procede is, Im assuming jb4 is the same.

It runs a stock map with 8 psi target until 160 F. Then it depends on what map you have selected. I run map 5 and hit 16 psi after it warms up.

[Pete Schweaty]

Originally Posted by Chipped B6

Not true. JB4 has a built in safety running stock from <160 and >280 Fahrenheit

This.

[E90Company]

Originally Posted by ihc95

But if she opens the hood it kind of spoils the stealthiness. Get a BMS drop in she'll never know.

But... because racecar

And yes, JB4 runs stock boost until 160*F as a built in safety feature. I don't get on it until like 200* anyways.

[TLO03]

small amount of e85 eliminates the catless odor.

[TommyLights]

If there are any issues like a leaking turbo you will find out immediately once you put in the DP's....and it will smoke like hell. Ask how I know

[sear]

OP, to try and answer your question about smell. If you keep the secondary cats you won't get bad exhaust smell after removing the main cats in the DPs.