Should I use 42 injectors

**supaxero** · 01-07-2009, 09:40 PM

at what point would you consider bigger injectors? I realize if you have a procharger or running turbos there is a need for more fuel. Is there a need with naturally aspirated motors?

**Mr. Luos** · 01-07-2009, 10:15 PM

Power level?

**SOMbitch** · 01-08-2009, 08:44 AM

If you have access to hp tuners or EFI live see what your injector duty cycle is. 80% is considered maxed out but some get by fine with more myself included.... I have seen 420hp motors max out a set of 28lb'ers and I have seen the same injector make 445 and be ok. I make almost 420 and and some 36lb'ers would be perfect with my setup or 42's woud also work well and I would have a little room to grow.... for that 383.....

**supaxero** · 01-08-2009, 09:38 PM

Sorry, I don't have any dyno numbers. 2000 WS6 K&N filter, 85 throttle body with Typhoon intake, mild cam, headers with a flowmaster

Thanks for the feedback. I guess the stocks will work for now.

**Soul TKR** · 01-08-2009, 10:10 PM

I had my stockers (24# i think) till about a week ago... my tuner got me into a set of FAST 36#'s... he said that they'd be fine to around 515-520 rwhp... I don't think I'll be anywhere near that so...

right now i'm at around 446 rwhp

**BDowning** · 01-09-2009, 05:57 AM

I have all the bolt ons and mild cam, with the stock injectors they are running @ 100% @WOT on the dyno. I need to step up to something bigger. I'm at 377 at the wheels now

Bill

**lstvr** · 01-13-2009, 11:38 AM

I max'd the stock LS2 injectors at 440rwhp, I now have 42's and am max'd at 513/510 at 58 psi. HTH.

**Midnight02** · 01-15-2009, 01:59 PM

My tuner (a VERY reputable shop here in GA) indicated that the 2000 - 2002 injectors are typically good up to around 460 rwhp. Based on your mods, I would imagine you're good to go....might be a different story if you had a 1998 model.