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After a discussion with another member on MFI and pressure. Got to wondering what other run for pressure. Not saying you set it up for one pressure and worked from there. Just what pressure your system operates at. Not that anyone is better than the other. If replying and know the following please include. Pressure at____ rpm Pump flow which pump nozzles style BV( cube VS. K style can be 50 lbs) What part of system are you getting pressure. Not asking for changing my stuff just a discussion of what you might run at. On all of my MFI stuff, I try to stay around 150 psi at 8000 rpm or 4000 pump. My pumps are oversized in some views at 7 gpm, but what I have always used. That is non blown of course, Seeing that I return over half to tank they maybe right. I do have room to adjust if changine flow requirements. Pressure is because I feel better atomization . Plus all of my jet and nozzle flow sheets are based on 150 psi. Makes it easier for me to figure gpm to engine and bypass. Not saying a low-pressure system does not work at all.This message has been edited. Last edited by: wideopen231, America home of free. Brought to you by 2nd amendment. | ||
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DRR Elite |
You just don’t learn. ![]() Nearly 1 month ago you posted this https://drr.infopop.cc/eve/foru...0760912/m/4027066007 Resulting in no replies and now this that hasn’t gotten reply in 12 hours. ![]() FYI, your “stuff” isn’t on a bracket car nor are you a bracket racer! Another of the many
That doesn’t apply to 99.9% of bracket cars and bracket racers! Again this isn’t the forum for you. | |||
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DRR S/Pro![]() |
On my TD which is pretty much bracket racing I ran 200#@8000 RPM. Ron's billet twin gear 12.9 gal pump and Enderle K valve. Pressure taken right at the pump outlet. 272" Spitzer 540 Chevy The Blower Shop XR1 FTI XPM Series Converter FTI Level 6 Powerglide 3.69@199 .916 60' 2017 Bradenton Heads Up Madness Open Outlaw Champ 2018 PDRA T/D #5 2019 PDRA T/D #2 2020 Retired From T/D Competition.... 2020 Bradenton NMCA Hemi Shootout Winner 2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass. | |||
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DRR Elite |
It’s not! You were towed to the lanes and back to the pits and nothing about the engine in your former TD is comparable, equitable, nor the same as the junk on this shytbox. | |||
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DRR Top Comp![]() |
Thanksd Bender. The 200 psi interesting. I am assuming you have pump saver on car. Have any idea of what pressure went to when shutting the throttle at top end? Asking because never had 200psi system on car. Although WOT pressure would not have anything to do with pressure at shutdown. I know my old TA/D stuff had a 175 psi I check. Most K valve spools only have fuel at that point when shut. America home of free. Brought to you by 2nd amendment. | |||
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DRR S/Pro![]() |
But, but, but, I did have to dial in...... ![]() 272" Spitzer 540 Chevy The Blower Shop XR1 FTI XPM Series Converter FTI Level 6 Powerglide 3.69@199 .916 60' 2017 Bradenton Heads Up Madness Open Outlaw Champ 2018 PDRA T/D #5 2019 PDRA T/D #2 2020 Retired From T/D Competition.... 2020 Bradenton NMCA Hemi Shootout Winner 2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass. | |||
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DRR S/Pro![]() |
I'd have to get my old laptop out to see what the pressure did when I lifted, can't remember off hand. I ran high pressure because I thought it might atomize the fuel better. 272" Spitzer 540 Chevy The Blower Shop XR1 FTI XPM Series Converter FTI Level 6 Powerglide 3.69@199 .916 60' 2017 Bradenton Heads Up Madness Open Outlaw Champ 2018 PDRA T/D #5 2019 PDRA T/D #2 2020 Retired From T/D Competition.... 2020 Bradenton NMCA Hemi Shootout Winner 2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass. | |||
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DRR Top Comp![]() |
Well 4 things done today. 1 Got good info from bender 2 upset edna 3 proved edna can not resist commenting even when the subject is out of his wheelhouse and he has nothing to ad. 4 edna admitted his bracket car is a shyt box. nothing about the engine in your former TD is comparable, equitable, nor the same as the junk on this shytbox. Your words. America home of free. Brought to you by 2nd amendment. | |||
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oh yea, edna I learned a long time ago do not to listen to ediots. Injector size has nothing to do with pump pressure on MFI which you know not a damn thing about and why your post are just lil bytch bumbling some useless crap. Ok got my extra bonus points for deal with retard for the month. bye now. America home of free. Brought to you by 2nd amendment. | |||
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DRR Elite |
But, but, but you didn’t want to and couldn’t dial any quicker than 6.10 with the NHRA. | |||
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DRR Top Comp![]() |
Agree with thinking on high pressure and atomization. See edna atomization is when the ful is prayed in a finer form more like a mist than having big droplets. The bigger droplets are harder to ignite. Which means less efficiency. Hope I made that simple enough. You are welcome in advance. America home of free. Brought to you by 2nd amendment. | |||
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DRR S/Pro![]() |
Like I always say, 6.10? That's cute. 272" Spitzer 540 Chevy The Blower Shop XR1 FTI XPM Series Converter FTI Level 6 Powerglide 3.69@199 .916 60' 2017 Bradenton Heads Up Madness Open Outlaw Champ 2018 PDRA T/D #5 2019 PDRA T/D #2 2020 Retired From T/D Competition.... 2020 Bradenton NMCA Hemi Shootout Winner 2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass. | |||
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Looks like bender just need more binders to slow his stallion down to meet the speed limit. America home of free. Brought to you by 2nd amendment. | |||
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DRR Elite |
Interesting. You ask a question about MFI and you get a response from a MF'ing midget who knows nothing about the subject at hand. I usually ran between 80 and 110, and found no real gains at the higher pressures. Foxtrot Juliet Bravo | |||
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DRR Top Comp![]() |
That funny as he11,well lot funnier than that. Bucky, I am taking it you ran higher too? Since stated never found any gains with higher pressure. How about consistency? Better or same with lower pressure. The higher atomization should give more power in theory.We all know how that works at times. A 100 psi not bad deal. Heck, More fuel system guys using 100 pis flow rating nowadays. My mentor Ralph Gorr used 150 and all of my numbers work off that so I stick in that area. Heck has worked good for me this long. America home of free. Brought to you by 2nd amendment. | |||
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On my data logger I record fuel pressure at 7,000 RPM to have a consistent data point. I use same RPM as the reference and it will help you tell if something is wrong. I have ran from 50 PSI to 150 with no difference in ET. Some will say at least 125 PSI is required to atomize the fuel. I do not buy into that theory now but you can run what ever you want. Does not matter much as long as you get right amount of fuel in the motor. IMHO. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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DRR Elite |
I played with a bit higher but didn't see anything favorable performance nor consistency. Before direct injection, it was rare to see oem's over 100 psi on efi. So they didn't see any big advantage in power or economy it seems. Foxtrot Juliet Bravo | |||
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Thanks, Bucky. You tree'd me on a question I had in mind about efi pressure America home of free. Brought to you by 2nd amendment. | |||
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DRR Trophy |
Enderle 80a-1 Flow 6.05GPM @ 100PSI 4000 pump rpm. Approximately 115 psi at 7500rpm at the port nozzle distribution block. .031 Enderle nozzle jets. Kinsler AS (screened) atomization nozzles with 3 - .125 nozzle vents. .110 main pill - target AFR 5.0 – ~1100 -1150 EGT K-valve secondary check 32psi idle check 3psi BV linkage (clickfast) set for 400 - 450 degrees Idle EGT ~6.0 AFR FIE launch lean-out: .030 pill set for 700 degrees EGT. Kinsler High speed: .045 pill @ 95psi Leaked @ % Blade gap @ .010 Idle RPM ~1600. 5.98 @ 114 – 3250lbs 440cuin 1.34 9.42@ 142.41 1.29 5.97 @ 114.00 @ #3251 Better in 2022 427 BBC by S&S Speed Center, AFD, Enderle MFI by Spud Miller Trackside Products, Sepanek Racing T400, Dynamic converter, Autoweld, Santhuff, Smith Racecraft, His real name is Richard but they call it "**** Fords Body Shop" | |||
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DRR S/Pro![]() |
Not that things can't be optimized, but this is pretty much it right here. I've heard of people installing nozzles upside down, so they spray up toward the throttle body instead of down toward the head. Ran just fine. When I went to Denver, I should have gone down 3-4 nozzle sizes but I didn't have any nozzle jets. Just used the pill to lean it out, about 20 numbers higher. Pressure would theoretically be a good bit lower. Ran just fine and won the event. Tony Leonard | |||
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