Thread: When to get new injectors?

Did a few searches, came up short. I was just looking for a quick answer as to when to get new injectors. I know that with a 3.4" pulley I can run stock injectors, but what size can I go down to before upgrading to 42.5# injectors? I was thinking around a 3.2" or so?

Gen3 or gen5?

Originally Posted by 99pgpgt

Gen3 or gen5?

*cough*sig*cough*

Originally Posted by blackspike2710

*cough*sig*cough*

*cough*tapatalk*cough*

Gen III .

The correct time to get new injectors is when your current injectors are no longer able to keep up the supply that your engine requires.

Scanning and tuning will give you the actual answer. Each vehicle is slightly different.

Matt... please explain so that the OP can get the benefit of your comment.

http://www.hptuners.com/forum/showthread.php?t=36722

Long story short i had unusual driveability issues which have been resolved merely by using better injectors.

Let us discuss fuel rail distribution over actual injectors?

Because the factory rail spits fuel like crap, especially after 300~WHP.

Proven on car with a certain blue car with a couple burnt pistons when it was getting enough fuel and injectors were no where near static.

Pro tip #1: Anyone planning on higher HP builds, need billet logs or an equivalent.

Pro tip #2: Lucas 42.5's are better than stock when they are able to even distribute fuel and not be choked out by certain areas of the rail, IE all the bends by the FPR.

Then lets talk injectors. Start with the source of the problem and work your way down.

HPT is blocked at work?

Teh funnys.

If only they knew what happened in chat here.

Give me a synopsis?

Get new ones when yours look like this..........

Originally Posted by matt5112

Lucas injectors are an ancient design.

Our stockers are better at "misting".

Dekas are okay but have sweet spots.

Zr1 injectors would be better than lucas, also have known injector cal, unlike lucas.

As in LS9...pricey?? LOL.

INTENSE-Racing.com: Siemens 60.0 (65.0) pound/hour Fuel Injectors

So basically we want to find an injector that doesn't have an electrical heart attack?

Yeah, cool.