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Thread: Should I use 42 injectors
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01-07-2009, 09:40 PM #1
Should I use 42 injectors
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?
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01-07-2009, 10:15 PM #2
- Join Date
- Aug 2005
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- Thornton, CO
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- 23,773
Red Tint Jewelcoat- 2008 Trailblazer SS
Power level?
2008 Trailblazer SS
Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
Lowered, HID's, tinted.
1999 Pontiac Trans Am WS.6 #1747 SOLD
531.1 RWHP 481.3 FT/Pounds all motor.
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01-08-2009, 08:44 AM #3
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- Oct 2007
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- NC
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SOM- 1998 T.A.
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.....
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01-08-2009, 09:38 PM #4
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.
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01-08-2009, 10:10 PM #5
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- Aug 2005
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- Murrieta, CA
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Arctic White- 1999 WS.6 Trans Am
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
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01-09-2009, 05:57 AM #6
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
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01-13-2009, 11:38 AM #7
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- Nov 2007
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- UK
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- 24
red- TVR Cerbera
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.
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01-15-2009, 01:59 PM #8
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.
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