12-20-2019, 10:35 AM | #1 |
Driver
199
Rep 516
Posts |
PS2 w/ upgraded hpfp - driveability - vs OEM Stock Turbo and hpfp
Hi - can someone comment on the low-end torque/city driving power going from stock turbo and hpfp to PS2 w/ upgraded hpfp?
I would like to hear from some people who have actually done this upgrade and what the turbo lag is like. Noticeable? Not? |
12-20-2019, 10:38 AM | #2 |
Major
485
Rep 1,105
Posts |
Not noticeable at all BUT I'm also using the xHP transmission flash so not sure how my car would feel without it.
__________________
435i M-Sport | Pure Stage 2 Turbo | MHD Tune | XHP Stage 3 | Wagner Comp Evo 2 | MPE | Evolution Racewerks CP/DP/TIC | M-LSD | XDI-35 |
|
Appreciate
1
gx5_027199.00 |
12-20-2019, 11:53 AM | #3 |
Driver
199
Rep 516
Posts |
Great, thanks..! Looking for others to chime in as well. The question has been asked, but usually only on person responds, so there isn't enough of a consensus. Thanks, Munchi!
|
Appreciate
0
|
12-20-2019, 01:36 PM | #5 |
BimmerPost Supporting Vendor
23800
Rep 190,173
Posts |
I agree with what has been said above, no noticeable turbo lag
__________________
Check out our current sale by clicking on this link!
https://x-ph.com/sale/ Phone number 702-494-9435 |
Appreciate
0
|
12-20-2019, 06:01 PM | #6 | |
Major General
5494
Rep 5,340
Posts |
Quote:
With that said, the power curve of the PS2 turbo is more ideal, IMO. It's has a more linear, naturally aspirated power curve rather than hitting hard immediately. Plus, it makes a lot more power than stock. On a track, it's power delivery is more ideal considering the amount of power gained. If all that power hit like the stock turbo, the car would be a nightmare to control.
__________________
The forest was shrinking, but the Trees kept voting for the Axe, for the Axe was clever and convinced the Trees that because his handle was made of wood, he was one of them.
|
|
12-20-2019, 08:41 PM | #7 |
Private First Class
37
Rep 128
Posts |
There is definitely more lag with just ps2, i just installed xdi 35 and did a custom tune and much better... wondering if my logs look good if they will push the boost up on my first revision of custom tune
My opinion is if your doing ps2 only don’t bother, if adding xdi and custom tune worth it. I also wonder if turbosmart blow off valve will help, vs gfb upgrade |
Appreciate
1
gx5_027199.00 |
12-23-2019, 06:17 PM | #9 |
Major General
4343
Rep 7,555
Posts |
I think XutvJet already gave you the best (and more quantitative) explanation you are going to get. You are going to hear both sides when you ask for opinions, because it is somewhat subjective, and often difficult to tell because the car should be faster overall after the PS2 even if the power delivery occurs later ("lag"). Going with any bigger turbo than stock is going to shift the power curve to the right (higher RPM). In general the difference between stock turbo and PS2 is exactly what XutvJet alluded to. Peak torque when stock is quoted at what, 1200-1300 rpm? You just arent going to achieve that fast of spool with a PS2. The tradeoff as with any increase in turbo size is that you will be able to make more torque [and HP of course] (albeit at higher RPM), and hold that power for longer without the turbo running out of steam.
Your best bet if you really want to "feel" the difference is find someone with a PS2 in your area and ride/drive it back to back with your car. Everything else is trying to interpret other people's subjective opinion on how it feels to them. |
12-23-2019, 07:16 PM | #11 |
Colonel
1072
Rep 2,353
Posts |
Definitely noticeable turbo lag. I cannot believe people saying otherwise... I can even feel the difference between PS2 Gen1 and Gen3. I hate waiting for the AT to shift down if I want to overtake so I try to apply just enough throttle to prevent that and in those cases there is clear turbo lag compared to stock.
If you primarily drive city and very rarely go above ~100mph then stick with the stock turbo.
__________________
M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost
(A Dane in China) |
Appreciate
1
Phyrexia502.50 |
12-23-2019, 07:17 PM | #12 | ||
Gettin It Figured Out
1818
Rep 2,669
Posts |
Quote:
Agree 100% with both above statements. Only other option to spool up a bit quicker would be BorgWarner’s EFR Dual ceramic ball bearing 7670 turbocharger. Speedtech developed a S3 kit found HERE .
__________________
|
||
Appreciate
0
|
12-23-2019, 07:23 PM | #13 | |
Colonel
1072
Rep 2,353
Posts |
Quote:
f32_027 In 4th gear (8AT) it takes the PS2 300rpm to deliver 10psi when 100% WGDC is requested at 3000rpm. You can compare this to your stock turbo and see the difference. https://datazap.me/u/harkes/ots-ps2-...-22&mark=18-23
__________________
M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost
(A Dane in China) Last edited by harkes; 12-23-2019 at 07:31 PM.. |
|
Appreciate
1
gx5_027199.00 |
12-23-2019, 08:30 PM | #14 | |
Driver
199
Rep 516
Posts |
Quote:
|
|
Appreciate
0
|
12-23-2019, 08:55 PM | #15 | |
Colonel
2067
Rep 2,638
Posts |
Quote:
EWG will make more power than PWG. All the people complaining about lag need to learn how to use the powerband correctly. The only way you're going to feel it is if you go below 3500rpm. Most of the time if you're already driving, all you have to do is downshift, and spend time in the upper rpms. The only thing that you'll probably complain about, is if you do 1/4 mile, it's a bit harder to launch as you have to start below 3.5k rpm. I've had my PS2 on my car the past 60k miles (about 96,000km) and never had a problem with it, when I go lapping, I spend all my time above 5000rpm so I never worry about lag at all. When I do go drag racing, XHP allows me to brake boost and launch in 2nd gear at about 3800rpm (Yeah not good for the drivetrain lol) but I do pull a 1.67-1.7sec 60ft.
__________________
Bootmod3, CTS Catless DP, B58TU HPFP, XHP, BM3 Flexfuel Kit
|
|
Appreciate
1
ronanz1818.00 |
12-24-2019, 12:20 AM | #16 | ||
Colonel
1072
Rep 2,353
Posts |
Quote:
Quote:
__________________
M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost
(A Dane in China) |
||
Appreciate
2
Alpine-F80197.50 gx5_027199.00 |
12-26-2019, 09:50 PM | #17 |
Captain
180
Rep 774
Posts
Drives: 2015 435i grand coupe xdrive
Join Date: Jan 2017
Location: Philadelphia, PA
|
Tbh get a speed tech with a smaller turbo on it. Will be better than a ps2 because the manifold flows better
__________________
2015 435i grand coupe xdrvie (current)
2006 F250 powerstoke CCSB (current) 2014 M235i Black on Red (SOLD) / 08 e90 335i MT Pure Stage 2 High flow (SOLD) 08 128i 6MT (SOLD) / 08 335i 6MT Pure stage 1 (SOLD) |
Appreciate
0
|
12-26-2019, 10:10 PM | #18 |
Driver
199
Rep 516
Posts |
Not really interested in a custom tune - ots through mhd = savings. Not tracking or racing car so don't need to extract the most power. Just looking for more fun.
|
Appreciate
0
|
12-27-2019, 09:01 AM | #19 |
Private
31
Rep 51
Posts |
A custom tune allows for much better driveability as well as a smoother power delivery. It is like $3k for a PS2 + install.... what is another $500 so that you get the most bang for your buck? If you dont want to put money into a custom tune, you shouldnt really be getting a bigger turbo honestly.
|
Appreciate
0
|
Post Reply |
Bookmarks |
Tags |
ps2, pure stage 2, turbo |
Thread Tools | Search this Thread |
|
|