Stock injector limit ?
04-23-2013, 06:34 PM
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Stock injector limit ? Hi All,
What size are the factory injectors for some reason i'm thinking an odd # like 31 lbers ?
Coming from mustang world I'd assume they support a ~350-375rwhp or so ?
Headers,exhaust,ls6 intake,ported tb,tune, and cam ?
Or are bolt on cammed cars running larger than stock injectors on unported stock heads ?
One last thing the intank pump what kind of power does it support before needing an upgrade ? I'm thinking they are 255lph stock ?
Thanks
What size are the factory injectors for some reason i'm thinking an odd # like 31 lbers ?
Coming from mustang world I'd assume they support a ~350-375rwhp or so ?
Headers,exhaust,ls6 intake,ported tb,tune, and cam ?
Or are bolt on cammed cars running larger than stock injectors on unported stock heads ?
One last thing the intank pump what kind of power does it support before needing an upgrade ? I'm thinking they are 255lph stock ?
Thanks
04-23-2013, 06:41 PM
#2
1) it changes year to year, 1999-2000's are the smallest around 26# and 1998/2001-2002 are 28# I believe
2) it depends on your definition, they will be running over 80% with a cam in most cases which is above the "recommended" limit, but people push 425rwhp on stock injectors. I hit 90%+ injector rate with just bolt-ons in my 2000, about 350rwhp
3) I won't comment on fuel pump, but keep in mind fbody cars run higher fuel pressure so a ford 36# injector on these cars will flow 40#+
2) it depends on your definition, they will be running over 80% with a cam in most cases which is above the "recommended" limit, but people push 425rwhp on stock injectors. I hit 90%+ injector rate with just bolt-ons in my 2000, about 350rwhp
3) I won't comment on fuel pump, but keep in mind fbody cars run higher fuel pressure so a ford 36# injector on these cars will flow 40#+
04-23-2013, 07:01 PM
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1) it changes year to year, 1999-2000's are the smallest around 26# and 1998/2001-2002 are 28# I believe
2) it depends on your definition, they will be running over 80% with a cam in most cases which is above the "recommended" limit, but people push 425rwhp on stock injectors. I hit 90%+ injector rate with just bolt-ons in my 2000, about 350rwhp
3) I won't comment on fuel pump, but keep in mind fbody cars run higher fuel pressure so a ford 36# injector on these cars will flow 40#+
2) it depends on your definition, they will be running over 80% with a cam in most cases which is above the "recommended" limit, but people push 425rwhp on stock injectors. I hit 90%+ injector rate with just bolt-ons in my 2000, about 350rwhp
3) I won't comment on fuel pump, but keep in mind fbody cars run higher fuel pressure so a ford 36# injector on these cars will flow 40#+
Is it a 255lph in the tank stock ?
Injector theories are all over the place i hear you on duty cycle.
On my first HCI 5L i ran it with the factory 19lbs injectors with larger TB and MAF meter, and tried it with 24 and 30lbs injectors with matching metors. In the end car ran the best #'s with the stock 19lbs and larger MAF.
Last edited by rpmmustang89; 04-23-2013 at 09:00 PM.
04-23-2013, 07:36 PM
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I am running stock size 28.8 lb injectors with 410 rwhp. 400 rwhp will tax the stock fuel pump pretty good, I would say it would hold up for a while assuming it was healthy. I have seen people run a hot wire kit on the stock pump with good results.
