How much power are stock injector capable of supporting (horse power and torque wise)?
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“Cars are the only thing on earth that will beat you, break you, make you bleed, make you cry, spend all your money, spend all your time, not work and not care that you will love more, the more they abuse you.” -Anonymous -
No more than stock really. They're only 14lb injectors.sigpic
- 1990 Ford LTD Crown Victoria P72 - the street boat - 5.0 liter EFI - Ported HO intake/TB, 90 TC shroud/overflow, Aero airbox/zip tube, Cobra camshaft, 19lb injectors, dual exhaust w/ Magnaflows, Cat/Smog & AC delete, 3G alternator, MOOG chassis parts & KYB cop shocks, 215/70r/15s on 95-97 Merc rims
- 2007 Ford Escape XLT - soccer mom lifted station wagon - 3.0 Duratec, auto, rear converter delete w/ Magnaflow dual exhaust
- 2008 Mercury Grand Marquis Ultimate Edition - Daily driver - 4.6 2 valve Mod motor, 4R75E, 2.73s. Bone stock -
maybe 170-180 (10-20 over stock). Mustangs stock with 205-210 come with 19's, I've got 240-250 and had to go with 24's.Builder/Owner of Badass Panther Wagons
Busy maintaining a fleet of FordsComment
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They'll handle up to 200hp with the fuel pressure cranked WAY up...the problem with that is, as you increase fuel pressure, you quickly decrease the flow rating of your pump. That's why it just makes more sense to upsize and keep stock-ish fuel pressure.'85 CV coupe- 351W, T5-Z, FAST Ez-Efi, shorty headers, 2.5" duals with knock off flowmasters, 2.5" Impala tails, seriously worked GT-40 irons, Comp 265DEH cam, 1.7rr's, Mallory HyFire 6A, Taylor ThunderVolt 50 10.4mm wires, 75mm t/b, 3G alt swap, 140mph PI speedo, PI rear sway bar, '00 PI booster/MC, 95-97 front spindles, '99 front hub bearings/brakes, '92-'94 front upper control arms/ball-joints, 3.73's with rebuilt traction-lok, '09 PI rear disc swap, '96 Mustang GT wheels with 235/55R17's.Comment
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Is that measured at the wheels or at transmission? The reason I ask is: I dynoed my car and have 155 rwhp plus 20% drivetrain loss is 186 hp. Am i pushing my stokish injectors?Originally posted by mrltd View Post“Cars are the only thing on earth that will beat you, break you, make you bleed, make you cry, spend all your money, spend all your time, not work and not care that you will love more, the more they abuse you.” -AnonymousComment
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flywheel I think.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
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here ya go, this should help http://www.rceng.com/technical.aspx89 townie, mild exhuast up grades, soon to have loud ass stereo....Comment
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I'm sure you are pushing those injectors and running way lean.
Those are RWHP figures, except for maybe what the mustangs ran. My cars were 195 rwhp and 245 rwhpBuilder/Owner of Badass Panther Wagons
Busy maintaining a fleet of FordsComment
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So if i replace stock 14s with 19s will stock ecm compensate? With stock injectors I started running lean at 4k rpm when dyno operator stopped the pull. I probably could have gotten 160 rwhp which is stock auto fox mustang output.“Cars are the only thing on earth that will beat you, break you, make you bleed, make you cry, spend all your money, spend all your time, not work and not care that you will love more, the more they abuse you.” -AnonymousComment
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No it wont. Unless you go with a ECM thats programed for them or install a tuner and learn how to use it.Scars are tatoos of the fearlessComment
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or swap in an HO cam and Mark VII ECM along with the 19# injectors.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
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The ECM yes but not necessarly the cam. The ECM can be repinned with the lopo firing order. There will be arguments on this but I ask a Ford engineer in the programing and tuning for Ford if it would work with no issues and he said yes. Did it and drove the car for 4 years or more.Originally posted by sly View PostScars are tatoos of the fearlessComment
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works yes, but you can get into odd quirks with the fuel trim if you do that. Sometimes it works out OK, sometimes it does strange things.
Increasing the pressure somewhat would probably be a better stopgap, but larger injectors with a tune to the ECM to let it know the larger injectors are there is the more proper way to do it.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
Everything looks like voodoo if you don't understand how it worksComment
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I have used the 93 Cobra ECM. Dont agree much with his coments on it or much about the others either.
One issue is fuel tables moified for different injectors. Injectors have different specs pulse widths, OHMs, impeadance ratings, etc. I have all the Ford engineering charts for most of the injectors. None of them can just be swapped between ECMs with out changing programing of the ECM.
The 93 Cobra and MAF are different from the 94 95. They wont interchange either they are set up different. 93 I believe are set up for 24lb injectors the 94 95 for 19 lb ones. Fuel table are for the most part very similar most difference will be were it goes into WOT based on VE charts.
Newer than that the ECMS ARE SET UP TO MONITOR A LOT OF OTHER things like power brake , power steering, and other inputs not programed into pre 94 ECMs.
As far as I know all ECMs operate off volumetric tables up to about 75 to 85% then go to WOT settings. Carbs do the same thing but use mechanical vacuum means to do it. VE charts are realy based off vacuum.Last edited by turbo2256b; 09-02-2013, 01:43 PM.Scars are tatoos of the fearlessComment
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