Turbolag after changing Intakes?

[F80Paul]

Originally Posted by CaryTheLabelGuy

I have measured the stock intakes vs the BMS intakes (which I personally own) and I've seen zero difference in IATs between the two. I wouldn't run the BMS intakes if my testing had gone differently.

Fair enough, I haven't tested the BMS. My original point was about the discussion in this thread about the front mount intakes causing issues vs. stock when in fact stock is also a front mount so the difference in length should not be an issue.

[F80Paul]

Originally Posted by BenM4Dominate

Looks like there is at least a few inches added before both MAF sensors on RK Tunes etc. so I'm 100% sure there is added length over stock.

I don't think you've tried high Flow filters on stock intakes. I have and it's a waste, even the BMC ones

Some engine bay variants, Eventuri's, are really smooth and add lots of sound, no issues with heatsoak due to uniqie filter design. These are same length as stock intakes!

If anything, RK Tunes reduces overall length by a few inches compared to stock because of the more direct routing to the front since it doesn't have to go through the filter box.

[aBMWfan]

Originally Posted by F80Paul

If anything, RK Tunes reduces overall length by a few inches compared to stock because of the more direct routing to the front since it doesn't have to go through the filter box.

I don't count that extension as part of the intake because it's before the air filter.

Notice the increased length of the RK tunes (air filter to MAF sensor)

[Mike@N54Tuning.com]

Originally Posted by BenM4Dominate

+1 JB4's are still detectable even if you remove it.

Where I disagree tho is they won't detect the JB4 unless you need warranty work on the engine, and BMW N/A sends a rep to open up your DME. This is assuming you already remove it before service

Flash tunes are detectable without removing the DME, BMW can remotely notice flash tune installed. And the DME could show signs of tampering

Pay for any damage you cause to your car while tuning, but the JB4 itself is not detectable once removed, which has been well proven over the years. The most people can come up with is maybe if a BMW engineer looked at freeze frame engine data he could infer the car was tuned. But I've never heard of any of my customers ever having such an issue. Flashing on the other hand, we know where that stands, as you are writing to the DME directly.

Mike

[F80Paul]

Originally Posted by BenM4Dominate

I don't count that extension as part of the intake because it's before the air filter.

Notice the increased length of the RK tunes (air filter to MAF sensor)

You have to count the length of ALL the piping when you are calculating the losses from the piping. The losses from the filter types as well as turbulence and friction losses from bends and the filter box are a separate issue as well.

[aBMWfan]

Originally Posted by F80Paul

You have to count the length of ALL the piping when you are calculating the losses from the piping. The losses from the filter types as well as turbulence and friction losses from bends and the filter box are a separate issue as well.

So you're saying RK Tunes and BMS intakes have same length (since BMS retains the stock extension)?

[F80Paul]

Originally Posted by BenM4Dominate

So you're saying RK Tunes and BMS intakes have same length (since BMS retains the stock extension)?

No, the BMS intake doesn't seal to the stock extension tube so it's not restricted by it. As far as airflow goes I'd consider the BMS the least restrictive option, and Cary says the IAT's are unaffected so that's a bonus.

[aBMWfan]

Originally Posted by F80Paul

No, the BMS intake doesn't seal to the stock extension tube so it's not restricted by it. As far as airflow goes I'd consider the BMS the least restrictive option, and Cary says the IAT's are unaffected so that's a bonus.

Hmmm I see. Well I learned something new today!

[CaryTheLabelGuy]

Originally Posted by BenM4Dominate

So you're saying RK Tunes and BMS intakes have same length (since BMS retains the stock extension)?

Yeah, like Paul is saying, the BMS intakes keep the bottom half of the intake box and inlet from behind the kidney grills, but this isn't sealed. The BMS intakes just sit in the top-half of the stock intake boxes. Air from the front of the car is still routed up and directly into the BMS intakes, however, they just aren't sealed and therefore not a part of the intake tract directly.

[Mjaspreet]

Are there any dynos to compare front mount intakes to a intake like bms