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Discussion Starter · #1 ·
Just curious if anyone has ever dynoed their ST in the low boost setting, regardless of modifications.

I use my low boost setting regularly when I know I'll be sitting in traffic or doing strictly city driving and I'm always surprised by how punchy the car is even on 14psi.

Thanks for feeding my curiosity!
 

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Just curious if anyone has ever dynoed their ST in the low boost setting, regardless of modifications.

I use my low boost setting regularly when I know I'll be sitting in traffic or doing strictly city driving and I'm always surprised by how punchy the car is even on 14psi.

Thanks for feeding my curiosity!
I probably wouldn't waste the expensive dyno time doing so but a vDyno is pretty easy to do, you could test it and let us know :cool:

Honestly though even at 15psi (what mine is with Strat) it's still a more powerful car than most commuter cars you see on the road. Stage 3 and E30 cars like your's are probably still over 200hp at 15psi. Stock runs 21 and dynos 230-ish at the wheels.
 

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Discussion Starter · #3 ·
I probably wouldn't waste the expensive dyno time doing so but a vDyno is pretty easy to do, you could test it and let us know :cool:

Honestly though even at 15psi (what mine is with Strat) it's still a more powerful car than most commuter cars you see on the road. Stage 3 and E30 cars like your's are probably still over 200hp at 15psi. Stock runs 21 and dynos 230-ish at the wheels.
Yeah I understand that it would be too expensive, unless someone has access to a dyno and got curious themselves. It feels like it's a solid 200hp!
 

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I dyno'd at my 20psi map -- 266 hp, 328 tq.
Pretty much stage 3 mods except for CAI.
20psi is 1psi less than stock so that isn't exactly a "low boost map" lol

My car peaks at 23psi and will hold at 20-21 so you are making normal numbers considering I hit 26xhp while at 20psi usually at ~4500rpm
 

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20psi is 1psi less than stock so that isn't exactly a "low boost map" lol

My car peaks at 23psi and will hold at 20-21 so you are making normal numbers considering I hit 26xhp while at 20psi usually at ~4500rpm


My tune can peak at 23 - 23.5 PSI on pump.
 

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My tune can peak at 23 - 23.5 PSI on pump.
Yeah..? That's normal lol I even said that in my post. It peaks at 23 and tapers off at 20-21 and holds...its at 20-21 at 4k rpm when you hit your max HP of about 260-270 so of course you got 266hp on 20psi...thats what all tuned stage 3 (basically) STs make at 20psi
 

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Discussion Starter · #10 ·
What's up local guy!
What's up Maryland! I moved to Howard County so I'm slightly closer to Severn. I take it you're at Fort Meade?

So I just added a gallon of e85 because I noticed some timing being pulled and a few knock counts in a 4th gear pull.

Went back down to the low boost setting and I swear the top end is stronger at 15psi tune than 22/23psi.

I'm guessing the fact that the turbo is well within its efficiency range, the lack of overheated air coming from the turbo allows the ECU to add as much timing as it wants. Either way, it felt really strong.
 

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Discussion Starter · #11 · (Edited)
My car on E30 stock turbo 17 psi and 22 degrees of timing

View attachment 237777
Daaaaaaaaaaaamn! That's a strong ass pull. My suspicions are correct. The K03 can perform just as well at its peak efficiency (if not better) than trying to force 23psi and expecting repeatable performance. I may try to get my tuner to get me a finely tuned 17/18 psi tune that I can run all year without fear of straining the turbo and overwhelming my stock intercooler!
 

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What's up Maryland! I moved to Howard County so I'm slightly closer to Severn. I take it you're at Fort Meade?
So I just added a gallon of e85 because I noticed some timing being pulled and a few knock counts in a 4th gear pull.
Went back down to the low boost setting and I swear the top end is stronger at 15psi tune than 22/23psi.
I'm guessing the fact that the turbo is well within its efficiency range, the lack of overheated air coming from the turbo allows the ECU to add as much timing as it wants. Either way, it felt really strong.
Nope, just over here because HoCo was to expensive hahaha. Where at in HoCo are you?
I need to get an E30 map on this thing, a little more power would be nice to have.

I'd be interested to see, as much as I hate it, some VDyno graphs to see if this is actually happening.
 

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Daaaaaaaaaaaamn! That's a strong ass pull. My suspicions are correct. The K03 can perform just as well at its peak efficiency (if not better) than trying to force 23psi and expecting repeatable performance. I may try to get my tuner to get me a finely tuned 17/18 psi tune that I can run all year without fear of straining the turbo and overwhelming my stock intercooler!
Exactly. You do lose a little peak tq however
 
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