Fuel Injectors/fuel pressure

00silvergt · August 1st, 2007, 09:49 AM

At the risk of sounding stupid....but at what point are the stock 19 lb injectors and stock fuel pressure at their limit? I have been told 19lb injectors are good to 300hp. I am not sure if thats rear wheel or flywheel. I have all the simple bolt ons and I realize that I dont need bigger injectors yet. The only reason I am asking this is because I want to make sure I am not leaning out at WOT. Would it be worth me getting a generic tune for my setup? To possibly bump up fuel pressure a tad.

HMUSN · August 1st, 2007, 10:44 AM

a tune would be a good thing.

I would suggest a wide band 02 sensor as well.

SWEET2KSTANG · August 1st, 2007, 01:13 PM

i have most bolt ons, and i am about to add p&p heads and headers to the list. i will still be on stock injectors. i havent had any leaning problems, actually i am runnning really rich and have been trying to get it tuned out. the stock 19lb injectors should hold to around 320rwhp, after that you may want to go ahead and invest into a set.

Boomer · August 2nd, 2007, 01:04 AM

I made 330rwhp at 90% duty cycle on my 19# injectors, I changed to a 30# and made the same peak but the curve was flatter and was only at 65% duty cycle.

00silvergt · August 2nd, 2007, 09:54 AM

Thanks everyone for your replies, I appreciate it.

August 1st, 2007, 09:49 AM	#1
00silvergt Regular 2000 Mustang Gt Join Date: Jun 2006 Location: Pennsylvania Posts: 387	Fuel Injectors/fuel pressure At the risk of sounding stupid....but at what point are the stock 19 lb injectors and stock fuel pressure at their limit? I have been told 19lb injectors are good to 300hp. I am not sure if thats rear wheel or flywheel. I have all the simple bolt ons and I realize that I dont need bigger injectors yet. The only reason I am asking this is because I want to make sure I am not leaning out at WOT. Would it be worth me getting a generic tune for my setup? To possibly bump up fuel pressure a tad. __________________

August 1st, 2007, 01:13 PM	#3
SWEET2KSTANG MM Fanatic 2000 mustang gt 12.01@114.69 Join Date: Oct 2006 Location: N.W. AR Posts: 3,668	i have most bolt ons, and i am about to add p&p heads and headers to the list. i will still be on stock injectors. i havent had any leaning problems, actually i am runnning really rich and have been trying to get it tuned out. the stock 19lb injectors should hold to around 320rwhp, after that you may want to go ahead and invest into a set. __________________ stock long block, bolt ons, slicks, and a little squeze 1/4 E.T. 12.06@114.69 Only two defining forces have ever offered to die for you: 1. Jesus Christ 2. The American G. I. One died for your soul, the other for your freedom.

August 2nd, 2007, 01:04 AM	#4
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 751	I made 330rwhp at 90% duty cycle on my 19# injectors, I changed to a 30# and made the same peak but the curve was flatter and was only at 65% duty cycle. __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

August 2nd, 2007, 09:54 AM	#5
00silvergt Regular 2000 Mustang Gt Join Date: Jun 2006 Location: Pennsylvania Posts: 387	Thanks everyone for your replies, I appreciate it. __________________

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