Help pick an injector for my twin turbo setup
07-07-2016, 01:26 PM
#1
Help pick an injector for my twin turbo setup Twin turbo LQ9.
58 psi.
Should be able to support 900 rwhp.
Tuner likes 80# Siemens Deka but in his experience, they are good for 750 rwhp reliably.
Basically looking for something a bit bigger that has good data available to tune off of. Needs a good idle as this will be a street car.
58 psi.
Should be able to support 900 rwhp.
Tuner likes 80# Siemens Deka but in his experience, they are good for 750 rwhp reliably.
Basically looking for something a bit bigger that has good data available to tune off of. Needs a good idle as this will be a street car.
07-07-2016, 01:37 PM
#2
Restricted User
I've been pushing the Deka 80s a lot higher than 750 whp.
The secret? Run more than 58 PSI of fuel pressure. I had 85-90% duty cycle at 20 PSI with 58 PSI. Turned it up to 68 PSI, now I run low 70s duty cycle.
And 'reliably' doesn't really come into question with power and injectors. Whether they are running 15% duty cycle or 85%, they aren't any less reliable.
The secret? Run more than 58 PSI of fuel pressure. I had 85-90% duty cycle at 20 PSI with 58 PSI. Turned it up to 68 PSI, now I run low 70s duty cycle.
And 'reliably' doesn't really come into question with power and injectors. Whether they are running 15% duty cycle or 85%, they aren't any less reliable.
07-07-2016, 01:48 PM
#3
I've been pushing the Deka 80s a lot higher than 750 whp.
The secret? Run more than 58 PSI of fuel pressure. I had 85-90% duty cycle at 20 PSI with 58 PSI. Turned it up to 68 PSI, now I run low 70s duty cycle.
And 'reliably' doesn't really come into question with power and injectors. Whether they are running 15% duty cycle or 85%, they aren't any less reliable.
The secret? Run more than 58 PSI of fuel pressure. I had 85-90% duty cycle at 20 PSI with 58 PSI. Turned it up to 68 PSI, now I run low 70s duty cycle.
And 'reliably' doesn't really come into question with power and injectors. Whether they are running 15% duty cycle or 85%, they aren't any less reliable.
07-07-2016, 05:20 PM
#6
9 Second Club
Twin turbo LQ9.
58 psi.
Should be able to support 900 rwhp.
Tuner likes 80# Siemens Deka but in his experience, they are good for 750 rwhp reliably.
Basically looking for something a bit bigger that has good data available to tune off of. Needs a good idle as this will be a street car.
58 psi.
Should be able to support 900 rwhp.
Tuner likes 80# Siemens Deka but in his experience, they are good for 750 rwhp reliably.
Basically looking for something a bit bigger that has good data available to tune off of. Needs a good idle as this will be a street car.
If you want bigger quite a few places sell 1000cc, 1300cc etc etc. As long as the tuner isnt stupid, idle will be fine.
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07-08-2016, 06:49 AM
#8
Restricted User
If you're going to run static, run as much pressure as you can without killing the flow of the pumps. Before, I was running a 42 PSI base and 26 PSI of boost, so 68 PSI of pressure at max boost. After blowing off the reference line a couple of times and realizing that it idles fine at 68 PSI of pressure, I couldn't find any reason not to just run it at static that way.
Deka 80s top out around ~750whp at 58 PSI static depending on fuel pump.
Deka 80s top out around ~750whp at 58 PSI static depending on fuel pump.
07-08-2016, 09:17 AM
#10
If you're going to run static, run as much pressure as you can without killing the flow of the pumps. Before, I was running a 42 PSI base and 26 PSI of boost, so 68 PSI of pressure at max boost. After blowing off the reference line a couple of times and realizing that it idles fine at 68 PSI of pressure, I couldn't find any reason not to just run it at static that way.
Deka 80s top out around ~750whp at 58 PSI static depending on fuel pump.
Deka 80s top out around ~750whp at 58 PSI static depending on fuel pump.
07-08-2016, 12:36 PM
#14
Who has the best prices on the ANSU or ID injectors.
Feel free to PM me if they aren't a sponsor. :p
So if I'm running a dual Walbro 450 lph setup with FAST rails, would I still have a fuel issue that would limit me to 750 rwhp?
-8 an supply. -6 an return.
Feel free to PM me if they aren't a sponsor. :p
So if I'm running a dual Walbro 450 lph setup with FAST rails, would I still have a fuel issue that would limit me to 750 rwhp?
-8 an supply. -6 an return.
Last edited by Gripenfelter; 07-08-2016 at 03:08 PM.
07-08-2016, 04:01 PM
#16
9 Second Club
If injectors cannot flow at your desired pressure, then all the fuel pumps/lines in the world are not going to change that
And given it sounds like you have a proper return system and FPR in use...it's also pointless not boost referencing the regulator to maintain injector flow relative with boost.