Godless Commie's ungodly turbo project - R2S Progressive Twin Turbo
06-26-2019, 09:34 PM
#127
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And, now that I am pretty much done - with the exception of a couple minor tweaks on my VE Table - here is my engine bay, in its latest incarnation.
I am driving and enjoying the hell out of the car...
I am driving and enjoying the hell out of the car...
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09-12-2019, 07:00 PM
#132
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Please explain guys... What the hell kind of sorcery is this?
I used to push 18.5 psi on my supercharger, and the car had power. Impressive acceleration.
My days (and weeks) were pretty busy for a while, so I was barely driving the car on a guesstimate setup. It felt very good.
So I had a chance to tweak the settings based on info and experience I had been gathering as I drove.
I set the HP-LP bypass at 4500 rpm, and the LP bypass at 4600, with proper hysteresis values.
Removed some timing from the 2000 - 2900 RPM band (heard some knock at about 2300 RPM @ 10 psi)
Added a bunch of advance at idle and low load areas - makes it much "zingier" (around 20 deg)
Touched up the VE table for smoother transition between cells.
And, roughly divided the open loop boost duty table in three sections, to start low and increase with RPM and load...
Holy ****.
The car scared me at 11 psi. Eleven.
It definitely has more power at 11 psi with this turbo setup compared to 18.5 with the SC.
Acceleration is really impressive from 2K all the way to about 4700 or so, and then, it just gets ridiculous.
I found myself feathering the brakes at 200 Km.
My initial plan was cranking the boost to about 1.5 BAR (about 21 psi), but there is no way in hell I will do that.
Pretty scary as it sits now.
And, it is perfectly quiet - the car drives and accelerates like it's electric.
I can comfortably state this project IS a as successful as it is rewarding.
Damn.
I used to push 18.5 psi on my supercharger, and the car had power. Impressive acceleration.
My days (and weeks) were pretty busy for a while, so I was barely driving the car on a guesstimate setup. It felt very good.
So I had a chance to tweak the settings based on info and experience I had been gathering as I drove.
I set the HP-LP bypass at 4500 rpm, and the LP bypass at 4600, with proper hysteresis values.
Removed some timing from the 2000 - 2900 RPM band (heard some knock at about 2300 RPM @ 10 psi)
Added a bunch of advance at idle and low load areas - makes it much "zingier" (around 20 deg)
Touched up the VE table for smoother transition between cells.
And, roughly divided the open loop boost duty table in three sections, to start low and increase with RPM and load...
Holy ****.
The car scared me at 11 psi. Eleven.
It definitely has more power at 11 psi with this turbo setup compared to 18.5 with the SC.
Acceleration is really impressive from 2K all the way to about 4700 or so, and then, it just gets ridiculous.
I found myself feathering the brakes at 200 Km.
My initial plan was cranking the boost to about 1.5 BAR (about 21 psi), but there is no way in hell I will do that.
Pretty scary as it sits now.
And, it is perfectly quiet - the car drives and accelerates like it's electric.
I can comfortably state this project IS a as successful as it is rewarding.
Damn.
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09-12-2019, 07:43 PM
#133
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Location: Las Cruces, NM
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Awesome!
That's how I felt too when I went from super to turbo. 10 PSI turbo > 10 PSI super.
Edit: ...10 PSI EFR + stock block = Hole in block
That's how I felt too when I went from super to turbo. 10 PSI turbo > 10 PSI super.
Edit: ...10 PSI EFR + stock block = Hole in block
Last edited by 99mx5; 09-12-2019 at 11:27 PM.
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09-12-2019, 11:46 PM
#136
Please explain guys... What the hell kind of sorcery is this?
I used to push 18.5 psi on my supercharger, and the car had power. Impressive acceleration.
My days (and weeks) were pretty busy for a while, so I was barely driving the car on a guesstimate setup. It felt very good.
So I had a chance to tweak the settings based on info and experience I had been gathering as I drove.
I set the HP-LP bypass at 4500 rpm, and the LP bypass at 4600, with proper hysteresis values.
Removed some timing from the 2000 - 2900 RPM band (heard some knock at about 2300 RPM @ 10 psi)
Added a bunch of advance at idle and low load areas - makes it much "zingier" (around 20 deg)
Touched up the VE table for smoother transition between cells.
And, roughly divided the open loop boost duty table in three sections, to start low and increase with RPM and load...
Holy ****.
The car scared me at 11 psi. Eleven.
It definitely has more power at 11 psi with this turbo setup compared to 18.5 with the SC.
Acceleration is really impressive from 2K all the way to about 4700 or so, and then, it just gets ridiculous.
I found myself feathering the brakes at 200 Km.
My initial plan was cranking the boost to about 1.5 BAR (about 21 psi), but there is no way in hell I will do that.
Pretty scary as it sits now.
And, it is perfectly quiet - the car drives and accelerates like it's electric.
I can comfortably state this project IS a as successful as it is rewarding.
Damn.
I used to push 18.5 psi on my supercharger, and the car had power. Impressive acceleration.
My days (and weeks) were pretty busy for a while, so I was barely driving the car on a guesstimate setup. It felt very good.
So I had a chance to tweak the settings based on info and experience I had been gathering as I drove.
I set the HP-LP bypass at 4500 rpm, and the LP bypass at 4600, with proper hysteresis values.
Removed some timing from the 2000 - 2900 RPM band (heard some knock at about 2300 RPM @ 10 psi)
Added a bunch of advance at idle and low load areas - makes it much "zingier" (around 20 deg)
Touched up the VE table for smoother transition between cells.
And, roughly divided the open loop boost duty table in three sections, to start low and increase with RPM and load...
Holy ****.
The car scared me at 11 psi. Eleven.
It definitely has more power at 11 psi with this turbo setup compared to 18.5 with the SC.
Acceleration is really impressive from 2K all the way to about 4700 or so, and then, it just gets ridiculous.
I found myself feathering the brakes at 200 Km.
My initial plan was cranking the boost to about 1.5 BAR (about 21 psi), but there is no way in hell I will do that.
Pretty scary as it sits now.
And, it is perfectly quiet - the car drives and accelerates like it's electric.
I can comfortably state this project IS a as successful as it is rewarding.
Damn.
Congrats sir, now take some videos
PS
Local here has a 814WHP miata. Talk about scary
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09-13-2019, 07:07 AM
#139
Junior Member
Join Date: Jun 2010
Location: Minneapolis, MN
Posts: 247
Total Cats: 37
Please explain guys... What the hell kind of sorcery is this?
I used to push 18.5 psi on my supercharger, and the car had power. Impressive acceleration.
I set the HP-LP bypass at 4500 rpm, and the LP bypass at 4600, with proper hysteresis values.
Holy ****. The car scared me at 11 psi. Eleven.
It definitely has more power at 11 psi with this turbo setup compared to 18.5 with the SC.
Acceleration is really impressive from 2K all the way to about 4700 or so, and then, it just gets ridiculous.
My initial plan was cranking the boost to about 1.5 BAR (about 21 psi), but there is no way in hell I will do that.
Pretty scary as it sits now.
I used to push 18.5 psi on my supercharger, and the car had power. Impressive acceleration.
I set the HP-LP bypass at 4500 rpm, and the LP bypass at 4600, with proper hysteresis values.
Holy ****. The car scared me at 11 psi. Eleven.
It definitely has more power at 11 psi with this turbo setup compared to 18.5 with the SC.
Acceleration is really impressive from 2K all the way to about 4700 or so, and then, it just gets ridiculous.
My initial plan was cranking the boost to about 1.5 BAR (about 21 psi), but there is no way in hell I will do that.
Pretty scary as it sits now.
It saddens me that we might not be getting many more development updates...amazing work, nice that it is finally coming together the way you imagined it.
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09-13-2019, 08:42 AM
#140
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The blower requires about 39 Hp under full power. High IAT means a tame advance table, and high EGT requires tons of fuel.
All of these factors come together, and mess with the overall power output.
Having driven a SC setup for 10 years, I now firmly believe a SC is best suited to a larger displacement engine at lower levels of boost.
A 4 liter V8 at 6 psi would be very sweet. A 1.8 like ours at 14, 16, 18 psi is not the most efficient path to take.
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