how much horsepower can 19lb injectors handle 1988 Mustang GT
Discuss how much horsepower can 19lb injectors handle 1988 Mustang GT on AllFordMustangs.com, the place for Mustang enthusiasts.
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Thanks that helps alot im not sure what hp i will be at when putting gt-40 upper and lower with 70mm tb and spacer but im sure its getting close to the limit of the stock ones so i think i will change the 19 to 24 and maybe lower the fule pressure a little untill i get my gt-40 heads
I think you will be fine with 19# injectors. But after the head swap, you will need to go to 24#.
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93 triple white Limited Edition. 17" Cobra "R"s, Cobra "R" hood, 180* thermo, Steeda Tri-Axe, white faced gauges, Phantom monster tach, 73mm calipers, with slotted fronts rotors, all Alpine stereo equipment, so, still stock (for now)...
"The only easy day was yesterday"
"That which does not kill you only makes you stronger"
"The early bird gets the worm, the 2nd mouse gets the cheese"
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you don't want to run injectors at 100% for any length of time - if you run over 85% (even 100%) from 5,500-6,200 rpm then the time is not enough to damage the injector. If your going to run a dry notrous system, then 19s are out of the question.
My car runs 19s (Speed Density), makes 277RWHP and has no problems with the injectors.
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Tom Moss
88 GT 5spd Vert 3:73s, stock H pipe with Flowmaster dumped, Crower 15511 cam @ 110 ICL, GT40P heads & 1.7 rockers, Jet-Hot coated MAC P headers, Holley SM2 intake, 70mm TB, and still SD with 19# Explorer injectors. Fastlanecars'dot'comtmossporting.0catch'dot'com/
I bought the motor from Ford Racing last year.
GT-40 b-303 cam rated at 345 flywheel hp
The second question, i really don't know.
That is their CLAIMED rating, and using parts that they specify (Ford Racing induction kit, headers, 65mm throttle body). If you don't use the exact same parts that they specify all bets are off. And even if you do, the HP that you get is not guaranteed to be the HP they claim it should make.
you don't want to run injectors at 100% for any length of time - if you run over 85% (even 100%) from 5,500-6,200 rpm then the time is not enough to damage the injector. If your going to run a dry notrous system, then 19s are out of the question.
My car runs 19s (Speed Density), makes 277RWHP and has no problems with the injectors.
But what is your engine's BSFC, and what is the static fuel pressure?
But what is your engine's BSFC, and what is the static fuel pressure?
an engine dyno with the equipment is the only way I know of to get that and I didn't do it. Use .45-.50 I guess. My fuel pressure is at 42#. imo you can run up to 44# before you should consider steping up to new injectors. It's not an option for me with SD and no chip.
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Tom Moss
88 GT 5spd Vert 3:73s, stock H pipe with Flowmaster dumped, Crower 15511 cam @ 110 ICL, GT40P heads & 1.7 rockers, Jet-Hot coated MAC P headers, Holley SM2 intake, 70mm TB, and still SD with 19# Explorer injectors. Fastlanecars'dot'comtmossporting.0catch'dot'com/
I read in a magazine that the 93 cobra with the factory gt40 mods has the 24# injectors for the low rating of 235hp that it produced but the story stated that the engine really did not need injectors of this size all the time but at points the 19# injectors from the stock 5.0 may be overworked in the 93 cobra but 24# injectors were almost overkill. Everyone knows with the proper rating of the 93 cobra that it was closer to making 250-260hp so it seems that 240-245hp might be a safe max hp on the 19# injectors. Just something I read.
That is their CLAIMED rating, and using parts that they specify (Ford Racing induction kit, headers, 65mm throttle body). If you don't use the exact same parts that they specify all bets are off. And even if you do, the HP that you get is not guaranteed to be the HP they claim it should make.
That's right. I believe they rate the horse power at the flywheel with no drivetrain losses or accessories.
So is 39 psi fuel pressure with 24 lb injectors good or should I bump up the fuel pressure some. I just want to make sure that I'm not running lean.
Thanks for all the help!
1993 GT Mustang / Ford Racing GT-40 Crate Motor B-303 Cam / 24 lb. Injectors / Stock Ignition / MSD EFI Blaster Coil / Edelbrock 5.0 Upper and Lower Intake with BBK Phelonic Spacer / Professional Products 70mm Throttle Body / C&L C.A.I. w/76mm MAF / Stock Air Box w/K&N Panel Filter / Holley Adjustable Fuel Pressure Regulator / Electric Fan / BBK Underdrive Pulley's / A.C. Removed / BBK Short Headers / Flowmaster Exhaust / Tremec T-5Z / B&M Short Throw Shifter / Alum. Driveshaft / 3.73 Gears / Eaton H.D. Posi / Moser 31 Spline Axles/ Subframe Connectors / Line Lock / Driveshaft Loop / B&M Short Throw Shifter / BMR Upper and Lower Control Arms / Lakewood Adjustable Drag Shocks/ Holley 190 lph Fuel Pump /
tmossporting.0catch'dot'com/
