[varooshgog]

Originally Posted by c0riolis

How worse was it? I am about to install this exact setup so I can see if I observe the same thing.

Will check if I can find a way to get objective data on this.

It was noticeable, but nothing major. It was more than worth it considering the heat (especially at track), and I think it more than balances out with a sport cat and other efficiency mods.

[///MPhatic]

Originally Posted by varooshgog

Not arguing with your experiences (your car, driving style, and environment can impact everything), but did you do these mods all at one time or piece by piece? I did mine in phases and felt (not measured) the following impacts to throttle response/lag:

Stage 1

• 200-cell Sport Cat - IMPROVED

Stage 2

• ER Charge Pipe - NEUTRAL
• ER Boost Pipe - NEUTRAL/SLIGHT IMPROVEMENT
• ER Intercooler - WORSE

Stage 3

• TurboSmart DV (Plumb Back) - IMPROVED
• Pure Turbo Inlet - IMPROVED
• VR Intake - NEUTRAL/SLIGHT IMPROVEMENT

I did them in stages. Fabspeed sport cat first, then the IC/tune, then the inlet and DV. The inlet and DV helped, but there is still lag, and more lag than stock.

For anyone reading this that's at Stage 2 and thinks there is less lag, go drive a stock car and report back on the lag, not the power.

[///MPhatic]

Originally Posted by ThreeStripes

Full disclosure that comment is coming from this guy:

Just thought you might like to see the backstory on this. I have never de-nibbed a set of tires in my life, never even thought of it, but since it was suggested I figured I'd try it. And honestly, the tire looks nicer now. Who knew?

[AmuroRay]

Originally Posted by ///MPhatic

I did them in stages. Fabspeed sport cat first, then the IC/tune, then the inlet and DV. The inlet and DV helped, but there is still lag, and more lag than stock.

For anyone reading this that's at Stage 2 and thinks there is less lag, go drive a stock car and report back on the lag, not the power.

Sounds like a boost leak, but I can't help without logs.

[ThreeStripes]

Originally Posted by ///MPhatic

Just thought you might like to see the backstory on this. I have never de-nibbed a set of tires in my life, never even thought of it, but since it was suggested I figured I'd try it. And honestly, the tire looks nicer now. Who knew?

Just good natured fun. Just reminding people that these things are very much subjective. One person feels lag, another doesn’t. Neither are wrong. Perception is reality as you said.

[///MPhatic]

Originally Posted by AmuroRay

Sounds like a boost leak, but I can't help without logs.

I keep hearing people say that, yet they never go drive a stock M2.

Pretty damn sure I don't have a boost leak, but keep playing that off like a larger intercooler doesn't have more lag.

Originally Posted by ThreeStripes

Just good natured fun. Just reminding people that these things are very much subjective. One person feels lag, another doesn’t. Neither are wrong. Perception is reality as you said.

No harm, no foul.

[AmuroRay]

My Intercooler is larger than yours and I have zero lag, same with others on the same Intercooler. How do you know you ha e no leak without a log?

[3t3p]

Don't think I am laggier. It's not much If it's there and the 430hp Vs stock feels absolutely like riotous fun

[NJ M3cs]

Has anyone done clutch delay valve delete in conjunction with mods? Please share your feedback. Thanks.

[twolegittwoquit]

FWIW, though I have no tuning experience, my 2018 has an Active Autowerks high flow catted DP (and exhaust) and I’ve had no codes. I bought the car with this set up, and my understanding is that it is not tuned, and in that configuration no issues with codes.

And it sounds amazing.

Edit: though it does have minor fitment issue so there’s a slight rattle at like 900rpm.

[ericlr1225]

Originally Posted by ///MPhatic

I keep hearing people say that, yet they never go drive a stock M2.

Pretty damn sure I don't have a boost leak, but keep playing that off like a larger intercooler doesn't have more lag.



No harm, no foul.

Stock tune is targeting 13ish psi if I remember it right, It's a small turbo, drive like a NA car from factory. With stage2 or above tune, you're targeting 16.7-20.7 psi from low end rpm. I guess there is probably 200rpm spool delay to meet target boost than factory tune (if you go WOT in 1.5-2.5krpm range). Anytime above 3000rpm,maybe little lower, it's instant power delivery like stock tune. stage 2 PS2 turbo meet it's boost target 4-4.5krpm.
For stage2 stock turbo I wouldn't say it's a "LAG". Just my 2c.

[///MPhatic]

Originally Posted by ericlr1225

Stock tune is targeting 13ish psi if I remember it right, It's a small turbo, drive like a NA car from factory. With stage2 or above tune, you're targeting 16.7-20.7 psi from low end rpm. I guess there is probably 200rpm spool delay to meet target boost than factory tune (if you go WOT in 1.5-2.5krpm range). Anytime above 3000rpm,maybe little lower, it's instant power delivery like stock tune. stage 2 PS2 turbo meet it's boost target 4-4.5krpm.
For stage2 stock turbo I wouldn't say it's a "LAG". Just my 2c.

We can call it whatever we want, but going from off-boost into boost there is a larger time delay than when the car was stock. Depending on the shift rpm, especially if it's higher, it's almost imperceptible, but the lower you go in the rev range the easier it's felt.

It's important to note that it's a feeling, which doesn't always directly translate to a number.

[ericlr1225]

Originally Posted by ///MPhatic

We can call it whatever we want, but going from off-boost into boost there is a larger time delay than when the car was stock. Depending on the shift rpm, especially if it's higher, it's almost imperceptible, but the lower you go in the rev range the easier it's felt.

It's important to note that it's a feeling, which doesn't always directly translate to a number.

I drive manual, only felt a bit really low end. No delay for me. I usually log full range 3rd to 4th maybe a little 5th, shift is smooth, instant delivery. Well it's a turbo car, I dunno what you really want from it. No lag also big boost?

[///MPhatic]

Originally Posted by ericlr1225

I drive manual, only felt a bit really low end. No delay for me. I usually log full range 3rd to 4th maybe a little 5th, shift is smooth, instant delivery. Well it's a turbo car, I dunno what you really want from it. No lag also big boost?

I'm doing some logging this weekend to prove I don't have a boost leak.

Yeah, I want the car to have as little lag as possible, and wasn't aware that I'd have in increase in lag feeling just by adding a moderate amount of boost.

It'll all come out in the logs.

[ericlr1225]

Post logs here and let's figure out~ It's the fun part of tuning.

[NJ M3cs]

Some of you mentioned, when tuning with BM3/MHD , I should use 91 octane. There are only two brand gas stations that I use, first choice is Shell 93, second is Sunoco 94. Is it safe to tune with 93 octane?

[ericlr1225]

Originally Posted by NJ M3cs

Some of you mentioned, when tuning with BM3/MHD , I should use 91 octane. There are only two brand gas stations that I use, first choice is Shell 93, second is Sunoco 94. Is it safe to tune with 93 octane?

Yes, you will be fine but still, do logs after tuning just to make sure it's safe under max load.

[3t3p]

I think what is meant is that over-octane for your tune. Esp BM3 you'd run the 91 map but give the car 93.

You could do the same with MHD but they seem to be ok with 93 map and 93 fuel.

[NJ M3cs]

Originally Posted by 3t3p

I think what is meant is that over-octane for your tune. Esp BM3 you'd run the 91 map but give the car 93.

You could do the same with MHD but they seem to be ok with 93 map and 93 fuel.

Yes, I meant to fill 93 octane Shell or 94 Sunoco and flash with 93 map , instead of 91.

[F87source]

Originally Posted by NJ M3cs

Yes, I meant to fill 93 octane Shell or 94 Sunoco and flash with 93 map , instead of 91.

That's fine and how you're supposed to do it. You flash the tune with the same octane you're filling up with.

So flash 93 if you're filling up with 93 or greater.


The only reason why you'd flash a 91 octane map and fill up with 93 octane is if you wanted additional safety. But that's not necessary as bm3 maps are pretty well made and quite safe. Just data log to make sure all is well and you're fine.

[NJ M3cs]

Originally Posted by F87source

That's fine and how you're supposed to do it. You flash the tune with the same octane you're filling up with.

So flash 93 if you're filling up with 93 or greater.


The only reason why you'd flash a 91 octane map and fill up with 93 octane is if you wanted additional safety. But that's not necessary as bm3 maps are pretty well made and quite safe. Just data log to make sure all is well and you're fine.

Same applies for MHD?

[F87source]

Originally Posted by NJ M3cs

Same applies for MHD?

Yes.