That's awesome! Your fuel demand increaser over stock will be proportional to the power increase. If you're upgrading to k2418gxt on our site you'll definitely want 80s in there. Or if going e85 use 1100s and a drop in walbro 450. Let us know if there's anything else we can help with!
I’ve got an 996 Turbo X50 with do88 intercoolers, Miltek Turbo back exhaust with sports cats and Turbosmart 11psi wastegates. I’m looking to have the car remapped/tuned, what fuelling mods do I need to do?
Stock x50 turbos run out at 600 crank / 530 or so whp. So you'd be at 100 percent or more duty cycle on stock injectors. If you're not planning on upgrading the turbos you'd be OK with a 5 bar which would give you a little bump just to keep the injectors from maxing out. 60lb injectors are a nicer upgrade that'll take you further and 80s even better. They're the same cost and run identically at low speeds so we prefer 80s on the 996tt. Then you're good to the limit of the stock pump or about 620whp. If you upgrade to k2418g or another hybrid you'll want to drop in our single walbro upgrade pump. Then you're good to the limits of the engine, rods and headstuds. We go over these in I blew up my Porsche and top 10 996t weak links for a more in depth explanation. BTW if you have a durametric cable we can tune you up right away and log for duty cycle to see exaclty how your system is performing :) hop over to our website for much more fun :)
@@protomotive thank you the reply, I will check out the website. I really didn’t think the car could make 600bhp with its current hardware. I was expecting mid 500’s.
I have a 996TT that I am upgrading the fuel pump to a 450 w/10 and 8 AN lines feed/return and 1000cc ID injectors. Would it be advantageous of me to also upgrade to a 997 3.8bar FPR to benefit from the larger orifice?
Yes, otherwise you'll tend to have artificially high fuel pressure at idle and light throttle due to the high volume fuel pump and lack of return capability. Just think you're feeding the engine with a 16 and 13mm ID hose and trying to return all that flow through 2mm, lol. Even 3 sounds small, but will return a 450 pump OK.
This was very informative, thank you, Todd! While it’s not a 996 Turbo, I have a 997 Turbo which, when I purchased it, had 1100cc fuel injector and a 5 BAR FPR. I have since dropped the engine and replaced the fuel injectors, which were bad, with your Protomotive 1100cc injectors. I also replaced the FPR with a Protomotive 5 BAR. With the larger injectors and the stock 997 Turbo fuel system, is having a 5 BAR FPR unnecessary? The car has a custom COBB tune as well. Thank you, sir!
I'm assuming your running pump fuel on a bolt-on kit? If so a 5 bar fpr is a bit overkill since you can produce 1000+hp on 1100s which would quickly destroy a stock lower end. On e85, 1100s are good for about 750+whp. Either way, you should have more than enough injector at 3.8 bar on a stock engine.
@@protomotiveThanks so much for the input, and for sharing your other video! I’m running 93oct with TiAL XR1000. The car was modded when I purchased it and I simply replaced the same size injectors and FPR when I last had the engine out. Now I know this set up is overkill since I’m not going for 1000+ HP, but currently making 688WHP and the car runs pretty well. Now that I know, I wish I had purchased something like 80lb injectors to make the car a little more compliant at low RPM and idle. I’ll revisit that one of these days. Thanks again, Todd!
@@nev997TT you're very welcome. 1100cc injectors should be very drivable, almost like stock. So run a datalog on the car and check the fuel trims are all OK. Some tuners get lazy and only work on max power then you're left with a car that stumbles or hesitates on the low end where you drive it most of the time. THat's completely tunable and should not be like that!
It’s simple… I see a protomotive video… I like protomotive video You should do a video of the importance of addressing boost leaks and how chaotic they can make these cars
Thank you for posting this! I am looking at rebuilding the turbos on my x50 and was researching what fuel demand would be needed. Perfect timing!
That's awesome! Your fuel demand increaser over stock will be proportional to the power increase. If you're upgrading to k2418gxt on our site you'll definitely want 80s in there. Or if going e85 use 1100s and a drop in walbro 450. Let us know if there's anything else we can help with!
I’ve got an 996 Turbo X50 with do88 intercoolers, Miltek Turbo back exhaust with sports cats and Turbosmart 11psi wastegates. I’m looking to have the car remapped/tuned, what fuelling mods do I need to do?
Stock x50 turbos run out at 600 crank / 530 or so whp. So you'd be at 100 percent or more duty cycle on stock injectors. If you're not planning on upgrading the turbos you'd be OK with a 5 bar which would give you a little bump just to keep the injectors from maxing out. 60lb injectors are a nicer upgrade that'll take you further and 80s even better. They're the same cost and run identically at low speeds so we prefer 80s on the 996tt. Then you're good to the limit of the stock pump or about 620whp. If you upgrade to k2418g or another hybrid you'll want to drop in our single walbro upgrade pump. Then you're good to the limits of the engine, rods and headstuds. We go over these in I blew up my Porsche and top 10 996t weak links for a more in depth explanation. BTW if you have a durametric cable we can tune you up right away and log for duty cycle to see exaclty how your system is performing :) hop over to our website for much more fun :)
@@protomotive thank you the reply, I will check out the website. I really didn’t think the car could make 600bhp with its current hardware. I was expecting mid 500’s.
@@sje106 yes the x50 and gt2 have quite the advantage with k24s over k16s
Brilliant!
Thanks for watching!
I have a 996TT that I am upgrading the fuel pump to a 450 w/10 and 8 AN lines feed/return and 1000cc ID injectors. Would it be advantageous of me to also upgrade to a 997 3.8bar FPR to benefit from the larger orifice?
Yes, otherwise you'll tend to have artificially high fuel pressure at idle and light throttle due to the high volume fuel pump and lack of return capability. Just think you're feeding the engine with a 16 and 13mm ID hose and trying to return all that flow through 2mm, lol. Even 3 sounds small, but will return a 450 pump OK.
This was very informative, thank you, Todd! While it’s not a 996 Turbo, I have a 997 Turbo which, when I purchased it, had 1100cc fuel injector and a 5 BAR FPR. I have since dropped the engine and replaced the fuel injectors, which were bad, with your Protomotive 1100cc injectors. I also replaced the FPR with a Protomotive 5 BAR. With the larger injectors and the stock 997 Turbo fuel system, is having a 5 BAR FPR unnecessary? The car has a custom COBB tune as well. Thank you, sir!
I'm assuming your running pump fuel on a bolt-on kit? If so a 5 bar fpr is a bit overkill since you can produce 1000+hp on 1100s which would quickly destroy a stock lower end. On e85, 1100s are good for about 750+whp. Either way, you should have more than enough injector at 3.8 bar on a stock engine.
Check this video out. It covers a lot of this. th-cam.com/video/xnfS-62rGVc/w-d-xo.htmlsi=msnBBl9R9vBV7i8c
@@protomotiveThanks so much for the input, and for sharing your other video! I’m running 93oct with TiAL XR1000. The car was modded when I purchased it and I simply replaced the same size injectors and FPR when I last had the engine out. Now I know this set up is overkill since I’m not going for 1000+ HP, but currently making 688WHP and the car runs pretty well. Now that I know, I wish I had purchased something like 80lb injectors to make the car a little more compliant at low RPM and idle. I’ll revisit that one of these days. Thanks again, Todd!
@@nev997TT you're very welcome. 1100cc injectors should be very drivable, almost like stock. So run a datalog on the car and check the fuel trims are all OK. Some tuners get lazy and only work on max power then you're left with a car that stumbles or hesitates on the low end where you drive it most of the time. THat's completely tunable and should not be like that!
It’s simple… I see a protomotive video… I like protomotive video
You should do a video of the importance of addressing boost leaks and how chaotic they can make these cars
Oh that's a great idea! How to diagnose boost leaks Combined with how to pressure test a turbo properly that would be a good one :)