Hello everyone!
I just wanted to start a thread for those out there with the Rex Regina EFI in their volvos who need more power.
As detailed in this thread:
http://forums.turbobricks.com/showthread.php?t=342889
My stock motor was toast and I found a nice healthy 95 year B230FT and grabbed it and the transmission.
I decided to keep the Rex Regina EFI for multiple reasons.
The stock map sensor is good for up to .483 BAR (7 psi) so staying under that for now is critical.
► I utilized OEM Volvo Bosch Orange injectors (315 cc from 850 turbo) As they are high impedance (no injector resistors needed) and have a better spray pattern than the factory 940 turbo injectors. Along with this I used the 3 bar FPR from the 940 turbo.
► The reason for the 315cc injectors is the following equation:
Est HP: 190.00 (non turbo hp 115 + 10/ psi = 185 ish)
BSFC: 0.60
Duty Cycle: 0.80
The 315 injectors rating is a@ 2.5 bar. So at 3 bar I am getting 378 cc/min
Injector size = (Hp * BSFC) / (# of injectors * duty cycle)
Injector size = 35.625 lb/hr = 374.1 (only 1.04%) from my chosen injectors.
► I used the Rex Regina intake manifold as it has a provision for the cold start injector and there is no hole for the now non existent EGR (I took the fitting from the exhaust manifold and welded it shut)
Ok now for the turbo I have the Mitsu 13C. Running stock boost pressure (7 psi) I also have a wideband and I am using the emulated narrowband output being fed to the ECU. Stock timing as well.
The car runs amazing and is pretty dang fast. I am using Lambda for the Air fuels and under boost It holds at .8-.83 (11.76-12.20) which is very safe. At idle and off throttle it targets and holds 1.00 (14.7)
I am confident that the Rex Regina is an excellent choice for those looking for lower boost pressures, and I will be experimenting with different map sensors to see how it handles it (and if any tuning is needed)
Let me know if you have any questions
I just wanted to start a thread for those out there with the Rex Regina EFI in their volvos who need more power.
As detailed in this thread:
http://forums.turbobricks.com/showthread.php?t=342889
My stock motor was toast and I found a nice healthy 95 year B230FT and grabbed it and the transmission.
I decided to keep the Rex Regina EFI for multiple reasons.
- 1 MAP based over MAF based for ease of intake installation and less problematic
- 2 Very similar to EFI used on jeep 4.0 and there is a ton of documentation on turbocharging those
- 3 A CHALLENGEEEEE
The stock map sensor is good for up to .483 BAR (7 psi) so staying under that for now is critical.
► I utilized OEM Volvo Bosch Orange injectors (315 cc from 850 turbo) As they are high impedance (no injector resistors needed) and have a better spray pattern than the factory 940 turbo injectors. Along with this I used the 3 bar FPR from the 940 turbo.
► The reason for the 315cc injectors is the following equation:
Est HP: 190.00 (non turbo hp 115 + 10/ psi = 185 ish)
BSFC: 0.60
Duty Cycle: 0.80
The 315 injectors rating is a@ 2.5 bar. So at 3 bar I am getting 378 cc/min
Injector size = (Hp * BSFC) / (# of injectors * duty cycle)
Injector size = 35.625 lb/hr = 374.1 (only 1.04%) from my chosen injectors.
► I used the Rex Regina intake manifold as it has a provision for the cold start injector and there is no hole for the now non existent EGR (I took the fitting from the exhaust manifold and welded it shut)
Ok now for the turbo I have the Mitsu 13C. Running stock boost pressure (7 psi) I also have a wideband and I am using the emulated narrowband output being fed to the ECU. Stock timing as well.
The car runs amazing and is pretty dang fast. I am using Lambda for the Air fuels and under boost It holds at .8-.83 (11.76-12.20) which is very safe. At idle and off throttle it targets and holds 1.00 (14.7)
I am confident that the Rex Regina is an excellent choice for those looking for lower boost pressures, and I will be experimenting with different map sensors to see how it handles it (and if any tuning is needed)
Let me know if you have any questions
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