[VGSON]

Originally Posted by ThreeStripes

You might consider the OTS Supersprint mid section that’s 3.1in diameter and mates to factory bits in that case.

https://www.turnermotorsport.com/p-1...gFkoNlDB0VPAlY

I personally would look at 4N’s f8x midsection & adapting your current DP to match….or get something made. It’s honestly not that much $$ especially compared to what these aftermarket setups run.

[ThreeStripes]

Big single sure does sound good.

[AmuroRay]

Originally Posted by M2guru

Not sure about the map. I do have a question into my tuner about the power delivery/lag.

Intake is stock. Exhaust is stock except for the catless pipe.

I haven't seen an intake that would perform better in terms of bringing in cold air. Maybe I am missing it or I should be looking at flow more than temp...?

I would love to open up the exhaust, but not sure what is best. I might try to make one myself because I'd like to try, but I don't think that's in the cards. Now that I am not driving it on the street, I only have to worry about noise ordinances at tracks or my ears.

The CTS intake had a measurable impact on WGDC and IATs. My RK intake even more so - I compared them in the MILVS thread I believe. The only issue with the RK is if the filter will block airflow to the radiator. neonbrown said he didn’t have any issues with his coolant/oil temps after installing it and it cut his IATs down by an additional 15-20F? He made a thread where he was talking about it.

On the exhaust, the biggest restriction is after the downpipe. There was a guy selling a complete AWE exhaust for like $1.3k? Including midpipe and muffler. Again, for me, this was a measurable decrease in wgdc.

My wgdc is about 10% lower than someone with similar mods due to these changes.

[ZM2]

Haven’t seen that the CTS intake has much of an impact vs the stock M2 intake that is closed under the hood and already has cold air routing to the nostril area. An aFe scoop will grab more of that cold air.

Guessing the RK intake has some impact for the M2, if you’re OK with the looks and don’t need clean air to the radiator. I’ll pass.

My WGDC stays 85-90% on track even on my near 500whp tune, so not sure why M2guru is hitting 100%. Boost leak?

[ericlr1225]

Stock box + stock intake are fine, I'd assume somewhere is leaking or it's the tune. Check WGCD calibration too. Small turbos could hit 25-26psi with 90% at 6k. 100% is def not right. I've seen Pure750 logs 30psi+ at 90s%.

[VGSON]

when i had a real boost leak i could hear it and could also see it very clearly in logs..He/you may have what i did..My wastegate wasn’t actually closing, was open by about 2mm..People had me chasing leaks. We put it on the lift, took of the dp and cycled it with ista. then adjusted it..His hits 100 briefly then drops to 90’s..which its supposed to do. Gate closes til target is reached, then opens..I can’t see a log to see a full detail, but if you’re always in the 90-100 range and at 21psi…check your wastegate.

[M2guru]

Originally Posted by VGSON

when i had a real boost leak i could hear it and could also see it very clearly in logs..He/you may have what i did..My wastegate wasn’t actually closing, was open by about 2mm..People had me chasing leaks. We put it on the lift, took of the dp and cycled it with ista. then adjusted it..His hits 100 briefly then drops to 90’s..which its supposed to do. Gate closes til target is reached, then opens..I can’t see a log to see a full detail, but if you’re always in the 90-100 range and at 21psi…check your wastegate.

I appreciate everyone's thoughts. I'll check the wastegate then boost leaks. I didn't check the wastegate after I installed it - only measured per the manual and sent it.

Now to figure out how to check/cycle the wastegate...not feeling like learning the software-side of things...might bring it to an indy shop. Next track day is a week away.

[Sparky68]

Thinking about replacing the stock turbo with the Pure500. Seen online that you need to reset the WG via BMW software , is that correct ? If so does it make it a shop only install ?

[ThreeStripes]

Originally Posted by Sparky68

Thinking about replacing the stock turbo with the Pure500. Seen online that you need to reset the WG via BMW software , is that correct ? If so does it make it a shop only install ?

Nope that can be done with several different solutions that are available to you including ProTools and other advanced scanning tools.

Mine is coming along but likely will be another 3-4 weeks before I’ve got meaningful driving impressions and video.

[VGSON]

Originally Posted by M2guru

I appreciate everyone's thoughts. I'll check the wastegate then boost leaks. I didn't check the wastegate after I installed it - only measured per the manual and sent it.

Now to figure out how to check/cycle the wastegate...not feeling like learning the software-side of things...might bring it to an indy shop. Next track day is a week away.

You should be able to turn the nut very slightly, more closed & check a log. See if there’s improvement or not. Like I mentioned; mine was open 2mm and had no codes..If you get a code, just reverse what you did…

[M2guru]

Originally Posted by VGSON

You should be able to turn the nut very slightly, more closed & check a log. See if there’s improvement or not. Like I mentioned; mine was open 2mm and had no codes..If you get a code, just reverse what you did…

I just did exactly this. Will find out in a week how it works during my next track day. I'll keep you posted! Thanks for mentioning this!