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  • Fishayyy's Avatar
    Today, 04:35 PM
    Are you looking for internal or external pumps? I dont know how he made the calculations, but psychosinmylobby came up with some fuel calculations for 1200whp. Its roughly around 600lph @72PSI
    55 replies | 1147 view(s)
  • 135pats's Avatar
    Today, 04:33 PM
    Lol grunts like myself don't get a bunch of tickets or anything like that. If you know any players give them a ping, everyone on the 53 gets 15-25 tickets for the Superbowl alone (more like 5-10 tickets for reg. season+playoff home games).
    209 replies | 7943 view(s)
  • Ericbh77's Avatar
    Today, 04:32 PM
    I know that the limitation of our HPFP lies within the size of the 3 bellows (that cant be enlarged) but id like to know what the maximum amount of fuel this pump can "eat" so i can get a better idea of what size pumps should be adequate for say 1000hp without going over board. It's been said that 2 walbro 255 pumps can support 1000hp and so can 2 bosch 044 pumps but is that enough for a DI system? I've read up on hitachi racing fuel systems for DI and they are very critical of every aspect of the delivery system. Even the pistons are knotched witha bowl to deflect fuel spray into plug and special 3 angle camshaft lobes are used for driving the HPFP
    55 replies | 1147 view(s)
  • Stucks's Avatar
    Today, 04:29 PM
    For what its worth, someone told me on e85, youll max the hpfp out with the flow a single walbro 450 can output. The main reason for going with a stage 3 setup is if you are running PI , since a single walbro 450 isnt enough to power the hpfp AND the pi for higher boost. I believe someone on here (it was a single turbo car, maybe a 6466?) ran the hpfp and pi with a single walbro 450 on straight e85 up to 22 or 23 psi. after that, the lpfp couldn't keep up flow to both and drops below 50. Just dont remember specifically who that individual was lol.
    55 replies | 1147 view(s)
  • nafoo's Avatar
    Today, 04:24 PM
    Can you hook me up with a ticket? I live in Houston so I will definitely go if you do :D
    209 replies | 7943 view(s)
  • Fishayyy's Avatar
    Today, 04:16 PM
    I've been wondering the same thing. It seems like people only know about how much horsepower you can make on different fuels before you need PI
    55 replies | 1147 view(s)
  • F3ADM's Avatar
    Today, 04:03 PM
    New map revision and the partial throttle over boost issue is pretty much non existent, where it used to happen nearly all the time it has only happened once in the last 300 miles, getting there! Also when in any gear I am experiencing throttle surging under highway cruising, constant throttle (not high boost condition). Plugs, coils, and injectors replaced 3K ago. This is under light throttle around 2krpm and feels like the throttle is being applied on and off, almost like the car is being pushed and then stops and then pushed again, in a rhythmic pattern. Again I can try to capture this in a log, it happens all the time whenever I'm driving under light throttle or in cruise control
    108 replies | 4130 view(s)
  • AdminTeam's Avatar
    Today, 03:53 PM
    Hey JadaReinha: :text-welcomewave:
    0 replies | 0 view(s)
  • Stucks's Avatar
    Today, 03:49 PM
    Good question...I've often wondered that. They say the bellows in the hpfp can only compress so much fuel. curious to know the max point for this.
    55 replies | 1147 view(s)
  • AdminTeam's Avatar
    Today, 03:44 PM
    John.dulaney, we appreciate you taking the time to join.
    0 replies | 1 view(s)
  • Ericbh77's Avatar
    Today, 03:40 PM
    Where does the HPFP fuel intake max out at? Meaning how much fuel can one push into it before it cant keep up any longer?
    55 replies | 1147 view(s)
  • bigdnno98's Avatar
    Today, 03:29 PM
    Great news. That's awesome. Congrats
    7 replies | 267 view(s)
  • jyamona@motiv's Avatar
    Today, 03:14 PM
    This is a good question. It certainly isn't playing nice with the PID. Thankfully, the system is robust and can handle it. I haven't defined the logging params for the LPFP PID but I'm sure it would be interesting to see. And yes when the 2nd turns on, PID error will be way high, and learn down...up to the point where you are losing pressure again and it will learn back up.
    55 replies | 1147 view(s)
  • AdminTeam's Avatar
    Today, 03:14 PM
    ziacra, we appreciate you taking the time to join.
    0 replies | 2 view(s)
  • TCW's Avatar
    Today, 03:10 PM
    As an update to what was causing my car to cut out randomly, it turns out it was a loose wire in the plug going into the 3.5 BAR AEM boost sensor. I repaired the intermittent connection and the problem appears to be solved.
    7 replies | 267 view(s)
  • psmith95's Avatar
    Today, 03:01 PM
    Posting to have this saved. Contemplating rebuilding my engine and might need some of these components if I do
    2 replies | 107 view(s)
  • AdminTeam's Avatar
    Today, 02:40 PM
    Welcome parsj022, take a look around, I think you will like what you see.
    0 replies | 10 view(s)
  • Abear's Avatar
    Today, 02:29 PM
    Abear replied to a thread M4 with Upgraded Pure Turbos in S55
    Gonna let us know the numbers when you guys are done?
    2 replies | 40 view(s)
  • psychosinmylobby's Avatar
    Today, 02:15 PM
    Thanks for the clarity! I got a few questions tho. So over time, it will adapt to the pump / pumps you are running? Won't PID cause the hobbs switch setups to be a bit screwy? Since all the pumps feeds into the LP reading and one pump isn't part of the control loop? When the second LPFP turns on, wont the error term of PID goes way high forcing it to learn down? Or does it not learn at WOT?
    55 replies | 1147 view(s)
  • Fishayyy's Avatar
    Today, 02:14 PM
    Yea that's what I figured. So based on everything I've heard I'll make one more draw-up! Last thing I'm trying to figure out is if it's worth it to try and run a -8AN line to the HPFP the only reason I don't want to is because I would probably have to have a custom Y fitting made for -10AN to -8AN and -6AN lol
    55 replies | 1147 view(s)
  • jyamona@motiv's Avatar
    Today, 02:08 PM
    You definitely don't want all of the pumps running at the same time. The fuel will get WAY too hot. Hobbs switches to turn on 2nd pump at say 10psi and 3rd pump at 20+ psi is the way to go.
    55 replies | 1147 view(s)
  • Fishayyy's Avatar
    Today, 01:59 PM
    So it could be properly tuned to run all three pumps at the same time? Only downside I can think of is it might heat the fuel a little more than if it were staged like Tony's setup. Not sure though. I would also hope that all three pumps would work together when the car turns on to pressurize the system quicker.
    55 replies | 1147 view(s)
  • Sticky's Avatar
    Today, 01:47 PM
    Sticky replied to a thread F32,F33,F36,F82,F83: M4 with upgraded Pure Turbos in 4 Series and M4
    Closed because duplicate
    2 replies | 22 view(s)
  • Sticky's Avatar
    Today, 01:46 PM
    Sticky replied to a thread M4 with Upgraded Pure Turbos in S55
    Moved to the S55 engine section. Come on man, you have to know what engine the M4 has...
    2 replies | 40 view(s)
  • jyamona@motiv's Avatar
    Today, 01:44 PM
    It uses PID to hit a target LP value. 2D table for target, axis load and rpm IIRC.
    55 replies | 1147 view(s)
  • psychosinmylobby's Avatar
    Today, 01:36 PM
    Sounds like a good idea. Does replicating the DME PWM pump signal to control all of them not work? I am assuming the DME adjusts the duty cycle by using the LP fuel sensor reading as a feedback control. If the DME controls the LPFP with just simply fixed RPM = Duty Cycle mapping, then you will have a lot more fuel pressure with the stock mapping.
    55 replies | 1147 view(s)
  • Eurocharged's Avatar
    Today, 01:30 PM
    This BMW M4 is turning up the boost with a new pair of upgraded Pure Turbos, new downpipes, high flow filters, and a custom Eurocharged dyno tune. Can't wait to hear this monster go wide open throttle! :awesome: ‪#‎Eurocharged‬ ‪#‎Performance‬ ‪#‎BMW‬ ‪#‎M4‬ ‪#‎PureTurbos‬ ‪#‎Downpipes‬ ‪#‎Dyno‬‪#‎Tune‬ ‪#‎Custom‬ ‪#‎Boost‬ ‪#‎Boosting‬ ‪#‎Boosted‬
    2 replies | 40 view(s)
  • Sticky2's Avatar
    Today, 01:30 PM
    Sticky2 replied to a thread F32,F33,F36,F82,F83: M4 with upgraded Pure Turbos in 4 Series and M4
    S55 engine section bro...
    2 replies | 22 view(s)
  • Eurocharged's Avatar
    Today, 01:28 PM
    Eurocharged started a thread F32,F33,F36,F82,F83: M4 with upgraded Pure Turbos in 4 Series and M4
    This BMW M4 is turning up the boost with a new pair of upgraded Pure Turbos, new downpipes, high flow filters, and a custom Eurocharged dyno tune. Can't wait to hear this monster go wide open throttle! ‪#‎Eurocharged‬ ‪#‎Performance‬ ‪#‎BMW‬ ‪#‎M4‬ ‪#‎PureTurbos‬ ‪#‎Downpipes‬ ‪#‎Dyno‬‪#‎Tune‬ ‪#‎Custom‬ ‪#‎Boost‬ ‪#‎Boosting‬ ‪#‎Boosted‬
    2 replies | 22 view(s)
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