[Saif2018]

Originally Posted by BM3Rrrr

Just looking at your two logs

First log (stg 1):
Time - 227.62, Boost psi: -1.1
Time - 228.32, Boost psi:+12.1
0.70 seconds

Second log (stg 2)
Time - 98.17, Boost psi: -1.1
Time - 98.96, Boost psi: +17.5
0.79 seconds

So what you are saying is you "feel" the 0.09 seconds of lag?

lol 😂

[lwgrenier]

I'm just playing Devil's advocate here but if you're used to something taking X amount of time and it takes ~13% longer then it's possible that's noticeable. Even when it's such a small amount of time. The mind is good at identifying slight differences.

Edit: Although I'd be surprised if boost onset was consistent enough from pull to pull for that to be the case. Logs could prove that though.

[Saif2018]

Originally Posted by lwgrenier

I'm just playing Devil's advocate here but if you're used to something taking X amount of time and it takes ~13% longer then it's possible that's noticeable. Even when it's such a small amount of time. The mind is good at identifying slight differences.

Edit: Although I'd be surprised if boost onset was consistent enough from pull to pull for that to be the case. Logs could prove that though.

0.09 Secs lag difference lol, that's quicker than you can blink, but apparently op detected it

We must have an F1 driver in our midst. 😂

[slay2k]

Originally Posted by Rule1977

Yeah I understand what you're saying and I don't have that problem.. how many miles are on your car/turbos?

92k miles, brand new turbos (w/ fixed injectors & wastegates) went in via warranty at 72k miles, so turbos / injectors / wastegates have ~20k miles on them.

Originally Posted by BM3Rrrr

Just looking at your two logs

First log (stg 1):
Time - 227.62, Boost psi: -1.1
Time - 228.32, Boost psi:+12.1
0.70 seconds

Second log (stg 2)
Time - 98.17, Boost psi: -1.1
Time - 98.96, Boost psi: +17.5
0.79 seconds

So what you are saying is you "feel" the 0.09 seconds of lag?

First off, I appreciate you taking the time to look, despite making me look like a f'ing lunatic.

That said, this isn't exactly apples-to-apples, right? The 227.62 timestamp on stg 1 was in 3rd gear @ 2829rpm. The 98.17 in stg 2 log was 2nd gear @ 3225rpm. We all agree that starting RPM matters, right?

Here's a run I just logged today where I started in low RPM in 2nd gear.

https://datazap.me/u/slay/stage-2-75...ata=0-2-3-4-21

1051.31s @ 2250rpm -> -0.1 psi
1051.98s @ 2805rpm -> 5.9 psi
1052.47s @ 3336rpm -> 16.4 psi

[Side Note / Mystery Bonus] Anyone know what the hell is going on from 1051.22 -> 1051.31? How did the RPM drop at full throttle with no torque limiter?!

So in that same ~0.7 time span you posted above, I was able to build 6psi, as opposed to 13 or 18.6 like in your calculations above. I guess on the next run I'll log starting in 3rd gear at 2829rpm to have a fair comparison.

Can we all agree that physics dictates these much-bigger-cores will take longer to fill up than stock? I don't know the core volume of the Competition HD 7.5", and neither does anybody else because VRSF fails to publish this info and also fails to answer customer support emails. Great company But their VRSF race 7.5" is 1080 cubic inches VS stock 425 cubic inches. That's 2.5x the volume air needs to fill before hitting the intake manifold.

Originally Posted by lwgrenier

I'm just playing Devil's advocate here but if you're used to something taking X amount of time and it takes ~13% longer then it's possible that's noticeable. Even when it's such a small amount of time. The mind is good at identifying slight differences.

Edit: Although I'd be surprised if boost onset was consistent enough from pull to pull for that to be the case. Logs could prove that though.

Yeah, to be fair, I probably wouldn't notice 90ms unless we're talking network lag time, but this certainly feels like a helluva lot more than that

One theory: everyone else put in their FMIC & DP at the same time. I rode around on just the DP, getting used to quick spool. Maybe that's why the difference feels so stark to me?

[BM3Rrrr]

I agree its not the fairest comparison considering the different gears and maps but.... you did make 5.4 more psi in almost the same amount of time on the second run.

In the most recent log, your WGDC takes 1.09 seconds to close compared to almost half that in the past logs. Did you change anything between that time? That can account for the lag you are feeling

[slay2k]

Originally Posted by BM3Rrrr

I agree its not the fairest comparison considering the different gears and maps but.... you did make 5.4 more psi in almost the same amount of time on the second run.

In the most recent log, your WGDC takes 1.09 seconds to close compared to almost half that in the past logs. Did you change anything between that time? That can account for the lag you are feeling

Ok, but I also made 7psi less in the same amount of time on the 3rd run. We can't compare different RPMs.

Regarding WGDC, are you talking about the time to re-open the wastegates? So for WGDC to drop back down from 99? If so, isn't that a reflection of the fact that it takes longer to build boost? In other words, a symptom of boost lag and not a cause. Nothing else changed except the low starting RPM, so it now takes way longer to build up to max boost, thus keeping the wastegates closed longer. If you meant something else, please clarify the time range.

I'm still waiting for Torgus to show me where my boost leak is.

[BM3Rrrr]

Originally Posted by slay2k

Ok, but I also made 7psi less in the same amount of time on the 3rd run. We can't compare different RPMs.

Regarding WGDC, are you talking about the time to re-open the wastegates? So for WGDC to drop back down from 99? If so, isn't that a reflection of the fact that it takes longer to build boost? In other words, a symptom of boost lag and not a cause. Nothing else changed except the low starting RPM, so it now takes way longer to build up to max boost, thus keeping the wastegates closed longer. If you meant something else, please clarify the time range.

I'm still waiting for Torgus to show me where my boost leak is.

Sorry, meant to say "open" not close with regards to the WGDC.
Still its odd that the first two logs didnt take soo long

[RicBond007]

WAGNER TUNING EVO II COMPETITION KICK ASS I.M.E. Smokin deal via MikeXPH. Application current 2011 E90 335I 6SPD M, CLUTCH VALVE DL, VRSF DP, VRSF CP, BMS CAI, JB4 MAP 5, Non city spirited driving 5,000'-10,000' alt. Logs attached 1st log OEM IC IAT 127F example. Other attach logs evo II com. IAT do climb while idle in traffic, drop once on throttle.

[Brule]

6f rise over 1/4mile run.
70f ambients
17psi 6 degrees adv

E85 fuel no meth.

[Brule]

Starting ait 107f down to 93f
86f ambient

1/4 mile run
DO3 nozzle 50/50 meth
ee85fuel
17psi
6 degree adv

[Brule]

add images

[type-dRew]

id love to see logs of that plazamann uploaded to datazap, screenshots are just noise

looks cool

[mike@x-ph.com]

Originally Posted by RicBond007

WAGNER TUNING EVO II COMPETITION KICK ASS I.M.E. Smokin deal via MikeXPH. Application current 2011 E90 335I 6SPD M, CLUTCH VALVE DL, VRSF DP, VRSF CP, BMS CAI, JB4 MAP 5, Non city spirited driving 5,000'-10,000' alt. Logs attached 1st log OEM IC IAT 127F example. Other attach logs evo II com. IAT do climb while idle in traffic, drop once on throttle.

Congrats

[Brule]

Originally Posted by type-dRew

id love to see logs of that plazamann uploaded to datazap, screenshots are just noise

looks cool

I tried to upload raw excel but it wouldn't work.
I would love to put a vrsf 7.5 race or whatever the best one is and do a back to back 1/4mile.

[_N54]

Installed the ARM 5" intercooler and i wasn't happy with the fitment results. In other YouTube videos I watched it seemed to fit better. What do you guys recommend I should replace it with that's not too pricey?

[Bimmer_Engineer]

Originally Posted by ///S58

Installed the ARM 5" intercooler and i wasn't happy with the fitment results. In other YouTube videos I watched it seemed to fit better. What do you guys recommend I should replace it with that's not too pricey?

I have a 5” stepped g plus from eBay. The fitment required a slight trim of the plastic. I’d judge it sufficient for stage 1+...I can’t speak beyond that.

[_N54]

Originally Posted by Bimmer_Engineer

I have a 5” stepped g plus from eBay. The fitment required a slight trim of the plastic. I’d judge it sufficient for stage 1+...I can’t speak beyond that.

I ended up using a extra washer and a crush washer before tightening up the nut that holds the intercooler in place and it actually helped more. This was the third time i was messing around with it and finally found that satisfaction, but i will def look into a better and larger intercooler in the future when i decide to upgrade the turbos.

[streetpro]

I have been driving w Wagner Evo 1 (oem connectors) for some 2 years, although it was a progress over the series IC, the temps were surely rising during the pulls... direct swap to VRSF HD 5" was painless, all fit the same, provided hoses/clamps were ok, hold the boost, stay in place...
After some 1000 km later I am very happy w the change, car pulls much stronger...
I know one could say that IC doesn't "give you" any extra HP but since it cools more, you get power that wasn't there before...

[mike@x-ph.com]

Originally Posted by streetpro

I have been driving w Wagner Evo 1 (oem connectors) for some 2 years, although it was a progress over the series IC, the temps were surely rising during the pulls... direct swap to VRSF HD 5" was painless, all fit the same, provided hoses/clamps were ok, hold the boost, stay in place...
After some 1000 km later I am very happy w the change, car pulls much stronger...
I know one could say that IC doesn't "give you" any extra HP but since it cools more, you get power that wasn't there before...

Were you getting any timing drops with the Wagner intercooler?

If you did then you needed a better / bigger or higher density intercooler. If you were not getting any timing drops, then you are making the same power with both intercoolers

[streetpro]

Yes, there were timing corrections and IAT was rising almost linearly... I can not fit 7" or larger due to the ACC, hence this HD version solved it...

[mike@x-ph.com]

Originally Posted by streetpro

Yes, there were timing corrections and IAT was rising almost linearly... I can not fit 7" or larger due to the ACC, hence this HD version solved it...

[E90drip]

Hey guys I’m new to the thread I have 07 e90 335 fbo minus the intercooler I’m running stage2 mhd and having pure 600 installed soon since I blew the oem ones which intercooler would work best for me it’s a daily