FUEL INJECTOR SIZE?

[1990LXstang]

Hi guys. I will be installing 1.7 RR's Trick flow street heat intake, 65mm FMS TB and larger MAF soon. I was wondering if you can get by with the stock 19#er's? I'll more than likley install a regulator with that to increase the fuel pressure a bit. Will I still be running very lean? I do not plan on changing the heads in the immediate future maybe at all. If I do say in 3 or 4 years they will probably be Thumpers Heads. Will it be time for me to upgrade to 24's? Or am I ok with the stockers?

 

[TwinTurbo93]

You'll be fine with the 19's for now, if you end up getting a good flowing set of heads in the future you might consider getting 24's but for now dont worry about it.

 

[rhamm1320]

Injector Size

I ran the calculator and you should be ok for up to 240 horsepower. The calculator is free at http://www.virtualengine2000.com if you want to play around with different numbers.

 

[CRASH7772]

19# injectors are good for up 320hp at the flywheel. You need to crank the pressure up but they can do it. If you around 300 I would bump up to the 24's, but as of now you should be fine. I just noticed you sig.....your fuel pump could be your first fuel problem. That is the weakest link in the stock system if your still on the stock pump.

 

[TheUser]

I ran the calculator and you should be ok for up to 240 horsepower. The calculator is free at http://www.virtualengine2000.com if you want to play around with different numbers.

yeah i think that program is wrong..stock is 220 hp, so you add a set of headers and flows and you already need to be thinking about 24's...no way!

 

[TwinTurbo93]

looks like you just put in the HP# and it spits out the injector size thats adequate for that power level... dunno?

 

[1990LXstang]

Hey guys, I'm going to stick with the 19's. However I'm going to change my fuel pump. Would a Holley 190LPH do the trick? I dont think that a 255LPH is required as of right now.

 

[SPEED FREAK]

lol I run 19's with my built 351w.... It runs out of fuel at 5000 rpm tho which really sucks hopefully ill have more money soon to replace them... University sucks the money right out of you.

 

[QDRHRSE]

Why bother with a 190 when you could have a 255 for a couple bucks more. The mustang fuel system has a return so within reason you can never really over-do a fuel pump.