[nick380]

Hey guys, I was wondering if my car requires anything before I add in a jb4 stage 3 tune. Read through the forums and I understand you can add in a dci and a downpipe but from what I read on the site it states I can have only the tune and everything else stock. I'm running an 07 335 e90 with about 75k miles all fluids have been checked and replaced when needed. I'll be doing the spark plugs before I add in the tune. Is there anything else I should check or add before applying the tune? When asking friends they talk about upgrading suspension and all sorts of jazz so the car can handle if, but according to the forums many people have fully stock e90s with just the tune...what am I missing here?

[Digitalism]

A well maintained and good working order vehicle is all you really need.
The best quality fuel for your area wouldn't go astray either.

[nick380]

Originally Posted by Digitalism

A well maintained and good working order vehicle is all you really need.
The best quality fuel for your area wouldn't go astray either.

Sounds good, what so you recommended I start off getting? Just the tune itself or with a dci

[Knobi]

Originally Posted by Digitalism

A well maintained and good working order vehicle is all you really need.
The best quality fuel for your area wouldn't go astray either.

+1
Based on your mileage, I would advice you to replace your coil packs as you do your spark plugs to avoid misfiring with your JB4.
You will be fine running stock, although I doubt it'll last too long once you realize the potential on these engines is more than you expected. I only wanted "tinted windows"... that didn't last too long

[Sidewinderpb]

Doit. The JB4 delivers a serious kick in the nuts over stock power levels. You'll be amazed at what a tune alone can do!

I think that the best bang-for-your-buck (post JB4) would be a downpipe(s). I do, however, see that you are from California; I've heard that they don't take kindly to emissions tampering.

[Dark_Knight_335]

Minimum requirements: A turbo and an N55
Recommended: two turbos, 4 cats, and an N54

[nick380]

Alright, thank you everyone for your input. I'll start of with the tune seeing as how that's the best bang for buck and I'll replace the coils/plugs using that Cobb video on the sticky. They say 25k on the plugs then replace, but what about the coils, when do they need replacing?

[AlpineSwift]

Why is this in the N55 section?

Coil packs on the N54 start going out around your mileage with a tune, wouldn't be a bad idea to replace them to prevent issues down the road. There's really no magic mileage number, it's just good to have new ignition components when you start tuning because unless you've owned the car since day one, you have no idea how it was driven or what condition everything you can't see is in.

Invest in BMS DCI when you purchase the JB4. Best combo of power mods for the money when you first start out. It's a slippery slope after that though because before you know it you're adding DP's and an FMIC.

[Andrewe92]

Originally Posted by nick380

Hey guys, I was wondering if my car requires anything before I add in a jb4 stage 3 tune. Read through the forums and I understand you can add in a dci and a downpipe but from what I read on the site it states I can have only the tune and everything else stock. I'm running an 07 335 e90 with about 75k miles all fluids have been checked and replaced when needed. I'll be doing the spark plugs before I add in the tune. Is there anything else I should check or add before applying the tune? When asking friends they talk about upgrading suspension and all sorts of jazz so the car can handle if, but according to the forums many people have fully stock e90s with just the tune...what am I missing here?

personally I say a charge pipe as the stock cp doesn't last very long with the higher boost levels. and spark plugs and a dci if you want. I personally don't even think you need dci that bad.. some people say car feels better without it but of course the argument can go on forever technically speaking the dci will get you more air which is what you want with a tune so go for it! let us know what you do

[Bobby_Sardells]

Originally Posted by Knobi

+1
Based on your mileage, I would advice you to replace your coil packs as you do your spark plugs to avoid misfiring with your JB4.
You will be fine running stock, although I doubt it'll last too long once you realize the potential on these engines is more than you expected. I only wanted "tinted windows"... that didn't last too long

your car is the nicest non-mtech 3 series i have seen. Well done sir
sorry lol

[Knobi]

Originally Posted by Bobby_Sardells

your car is the nicest non-mtech 3 series i have seen. Well done sir
sorry lol

Much Appreciated! I'll update the Build-Thread soon

[nick380]

Originally Posted by AlpineSwift

Why is this in the N55 section?

Coil packs on the N54 start going out around your mileage with a tune, wouldn't be a bad idea to replace them to prevent issues down the road. There's really no magic mileage number, it's just good to have new ignition components when you start tuning because unless you've owned the car since day one, you have no idea how it was driven or what condition everything you can't see is in.

Invest in BMS DCI when you purchase the JB4. Best combo of power mods for the money when you first start out. It's a slippery slope after that though because before you know it you're adding DP's and an FMIC.

Thanks for the reply, I'm sorry for posting in the wrong thread I was at work at the time so I might've been distracted and chose the wrong forum I'm using the iPhone app so I might've touched the wrong thread. I'll probably go with the tune and dci combo, replace the coils and sparks and see how it runs! Should I do a transmission fluid change as well in order for the tranny to handle the extra power easier? I know people usually say at 100k but with a tune would this need to be some earlier?