10-13-2021, 09:04 PM | #1 |
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PWG PS2 Roll call
Where are all the ps2 and pwg cars running stock fueling? No port injection, no meth, no E. Just plug and play with OTS tuning. It seems whenever anyone goes to a larger turbo they are chasing numbers and power goals. Some of us just wasn't more peer without much hassle.
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10-13-2021, 09:08 PM | #2 |
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I do that - sometimes on 91 and 93... What you want to know?
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10-13-2021, 09:13 PM | #3 |
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I'm looking to find out how late the spool is compared to the oe pwg. With the peak numbers chasing, as I understand it, the tunes essentially shift the area under the curve to place the emphasis on later in the rpm range. The effect of this is lag. Lag makes for not a fun drive around town of which I do a lot, no highway races here.
If you have power/torque plots and or real life data that would be great too
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10-14-2021, 03:29 AM | #4 |
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https://datazap.me/u/harkes
Edit: Keep the stock PWG for city driving. It will deliver plenty of power for city speeds.
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(A Dane in China) Last edited by harkes; 10-14-2021 at 09:37 AM.. |
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10-14-2021, 10:57 AM | #5 | |
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10-14-2021, 08:27 PM | #6 | |
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At 170k miles, all is fine so far (knock on wood) You'll be fine with PS2, should make 400whp on 91oct OTS.
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10-14-2021, 08:30 PM | #7 | ||
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10-14-2021, 08:46 PM | #8 |
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Yeah stock turbo have very early spool, think it spools around 1800-2000rpm, hits peak torque around 2500, so you can see how things tend to break lol
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10-14-2021, 10:14 PM | #9 |
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IIRC max torque for stock car is reported at 1500rpm. You probably arent making tuned boost levels at that, but its definitely at or below 2000rpm. It's not only the RPM either, it's how quickly it responds to on/off throttle, etc, in the lower rpm. Smaller turbo = less intertia = responds faster.
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10-15-2021, 03:16 AM | #10 |
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I have said it before but I sometimes miss the near instant response with stock snail. For city I have no doubt it will be faster than PS2 if you can find grip. Nothing will break traction like stock snail hitting 21psi at 2k rpm haha.
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10-15-2021, 08:24 AM | #11 |
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Anyone running BM3's OTS hybrid turbo tune, "Stage 2H"? Seems like it's designed to be run with the basic stage 2 mods plus a turbo like PS2 with no other mods i.e. stock fuel pumps etc.
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10-15-2021, 08:27 AM | #12 |
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I'd be curious to know what sort of difference you felt from the turbo upgrade while the tuning and everything else remained the same. For example, I currently have a downpipe, FMIC, CP, intake and exhaust... if I upgraded to PS2 and stayed on my same stage 2 93 tune and didn't touch the stock fuel system, am I going to notice an appreciable difference assuming the same tune?
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10-15-2021, 08:31 AM | #13 |
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I'm on this setup right now, 255 sq and lsd. Swear I was spinning tire the other day in first gear from a stop. Had to upshift to feel load through the rear end again. However could have also been a power cut. I was only driving in sport. This is definitely a case where two smaller snails is better than one.
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10-15-2021, 10:00 AM | #14 | |
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Stage 2H OTS has increased boost and timing up top vs the normal stage 2 OTS.
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10-15-2021, 12:25 PM | #15 |
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Correct its for upgraded turbo but stock fuel system. If you have both, you could run the 2+ map now. It's only slightly higher targets than the stage 2 map really since its working within constraints of stock HPFP. Before the 2+ map came out, people were experimenting with running 2H on stock turbo. IIRC its like 0.5-1psi higher target.
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10-17-2021, 02:50 AM | #16 | |
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10-17-2021, 02:55 AM | #17 | |
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10-17-2021, 08:26 AM | #18 |
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It would make sense that peak HP and TQ numbers wouldn't change, but if one were to upgrade the turbo without a tune change, wouldn't the car hold boost better at high rpm after the upgrade, where the stock turbo taps out? For example, on my S2 logs, the boost target is the same 17.5 psi at 3000rpm as it is at 6000rpm, the only difference being I can hit the target at 3000rpm, but not 6000rpm. With the bigger turbo, wouldn't I be able to hit the 6000rpm boost target, thus making the car pull harder in the high rpms?
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10-17-2021, 04:25 PM | #19 | |
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With BM3 and a boost-based tune you can in theory make more power at the same boost level (i.e., actual load would be higher) and the answer to your 2nd question would be yes, you would make more power in the upper RPM by virtue of actually meeting boost target. |
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10-18-2021, 08:26 AM | #20 | |
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Its better to choose a good safe consistent boost and timing level with a decently low WGDC for reliability and logivevity. I'm still debating whether I was to run PI with meth or just run a upgraded HPFP, where I currently live, my 91 octane is like 89 octane and we had to reduce boost and timing to 14.5 and 6-7 degrees, from 15.7 and 7-8 degrees.
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10-18-2021, 08:36 AM | #21 | ||
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10-18-2021, 08:41 AM | #22 | |
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The normal stock turbo OTS maps will run with PS2, but you have lower boost and timing up top vs the PS2 OTS maps. From what I see, MHD is better for PWG and BM3 is slightly better for EWG. |
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