In Soviet Russia car build YOU!
08-31-2012, 12:55 AM
#681
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ok so pornography time.
I actually kept my first EFR6258 (as in, haven't sent it in for replacement YET). So I can compare old EFR6258 to new EFR6758
First of all, ALL HAIL INTACT TURBINE WHEEL in it's Gamma-Ti glory
Then, turbine housings. This is one area that changed, and imho, got worse. Before it was gorgeous now it's a bit worse. There are casting marks and it just doesn't look as sexy anymore.
Wastegate are in particular was smoother before. I'll probably polish the new housing a bit to make it smoother.
Slight, minor differences everywhere
Area around turbine wheel is machined and is same, though.
Awesome CHRA with mega-super-awesome bearings and stuff.
Old vs new. Old compressor wheel ingested some shavings early in it's life (i'm sorry...) so there's that. Lesson learned - keep compressor housing clean and filter ON.
Compressor housings haven't changed slightest bit - other than the fact that they are for different wheels
6758 housing with 6258 compressor wheel shows the size diffeerence pretty clearly. It's not much but good enough to change 'rated' hp from 400 to 450.
The hole is for the speed sensor, which I got for free (winning!)
The box is a "speed converter" box. It's like $60 and converts a square wave signal into 0-5V reading, 5V being 200'000 RPM. It's made specifically for EFR speed sensor and comes with with nice sleeved connectors. Me likey. It was also a freebie.
And just some compressor wheel pornography.
I actually kept my first EFR6258 (as in, haven't sent it in for replacement YET). So I can compare old EFR6258 to new EFR6758
First of all, ALL HAIL INTACT TURBINE WHEEL in it's Gamma-Ti glory
Then, turbine housings. This is one area that changed, and imho, got worse. Before it was gorgeous now it's a bit worse. There are casting marks and it just doesn't look as sexy anymore.
Wastegate are in particular was smoother before. I'll probably polish the new housing a bit to make it smoother.
Slight, minor differences everywhere
Area around turbine wheel is machined and is same, though.
Awesome CHRA with mega-super-awesome bearings and stuff.
Old vs new. Old compressor wheel ingested some shavings early in it's life (i'm sorry...) so there's that. Lesson learned - keep compressor housing clean and filter ON.
Compressor housings haven't changed slightest bit - other than the fact that they are for different wheels
6758 housing with 6258 compressor wheel shows the size diffeerence pretty clearly. It's not much but good enough to change 'rated' hp from 400 to 450.
The hole is for the speed sensor, which I got for free (winning!)
The box is a "speed converter" box. It's like $60 and converts a square wave signal into 0-5V reading, 5V being 200'000 RPM. It's made specifically for EFR speed sensor and comes with with nice sleeved connectors. Me likey. It was also a freebie.
And just some compressor wheel pornography.
Last edited by soviet; 08-31-2012 at 01:09 AM.
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08-31-2012, 03:30 AM
#687
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That's a lot of triggering at 200,000rpm. No wonder they used that circuit, no ECU will be able to handle ~33,000 interrupts per second just for the speed sensor of the turbo.
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08-31-2012, 01:31 PM
#688
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You can read more about the speed sensor here - http://www.full-race.com/articles/efrturbotechbrief.pdf - just go down to Speed Sensor section.
converter box thingy: TSS - Turbo Speed Scaler for use exclusively with Borg Warner speed sensor equipped turbos
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08-31-2012, 01:41 PM
#690
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yes, MS can log a bunch of 0-5v inputs. Almost any EMS can log analog 0-5v inputs.
I also bought this $13 beauty. I might get it working
http://www.ebay.com/itm/280903275997...84.m1497.l2649
I also bought this $13 beauty. I might get it working
http://www.ebay.com/itm/280903275997...84.m1497.l2649
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08-31-2012, 01:47 PM
#691
But your $13 display is one digit short! If there is some way you can get it to show
Code:
turbine speed / 10
Edit: answered my own question.
Originally Posted by Ebay listing
Divider concept:
The number of the singal the gears get for one circle. For example, a gear can take 20 pulse signal for one circle , the divider value could be set to 20.
The number of the singal the gears get for one circle. For example, a gear can take 20 pulse signal for one circle , the divider value could be set to 20.
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08-31-2012, 01:50 PM
#692
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- Keys to set the divider value, divided by the value of 1-99999 and 0.0001-9.9999 file, the frequency value of power-down save
- Beautiful appearance, sophisticated technology and easy to use
- Divider Value Set
(Please disconnect the input signal before setting when the input signal is High level voltage signal)
Open the back cover, press the "S1" key to enter the Sub-frequency Value Set interface,"S1" key is the shift key, "S2" key is the value plus key, the divider value must be set in 1-99999 or 0.0001-9.9999 figures, and other value is invalid;After the set of the desired divider value via "S1" and "S2", wait 10 seconds and the meter will automatically return to the measurement mode, or power-off and then restart to return to the measurement mode . - Divider concept:
The number of the singal the gears get for one circle. For example, a gear can take 20 pulse signal for one circle , the divider value could be set to 20.
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