LT1-LT4 Modifications 1993-97 Gen II Small Block V8

are my injectors big enough?

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Old Jun 26, 2009 | 10:13 PM
  #21  
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you could always try scoring some 39(03-04 cobra) or 42 lb injectors (lightning) used for cheap
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Old Jun 27, 2009 | 02:43 AM
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Are these what I am looking for? or any other suggestions??? Just got an offer for some 42's for 200 bucks as well...

http://cgi.ebay.com/ebaymotors/36-CO...1%7C240%3A1318
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Old Jun 27, 2009 | 03:02 AM
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RMCR? You must be in colorado springs. So am I. I'm Running 30# svo injectors and with my mods they are only at 50% IDC. Due to our high altitude we lose like 30% of our horsepower so we can get away with a smaller injector.
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Old Jun 27, 2009 | 03:05 AM
  #24  
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No, I am in Cheyenne, Wy. However we are at a high altitude as well. I like to go down to Texas and low altitudes to race though, so I would like slightly larger if I need them so that when I go there I'm not losing power...
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Old Jun 27, 2009 | 04:18 AM
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Originally Posted by myltwon
you could always try scoring some 39(03-04 cobra) or 42 lb injectors (lightning) used for cheap
That's what I'm using.
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Old Jun 27, 2009 | 07:34 AM
  #26  
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Originally Posted by Z28Camaro30Ann
No, I am in Cheyenne, Wy. However we are at a high altitude as well. I like to go down to Texas and low altitudes to race though, so I would like slightly larger if I need them so that when I go there I'm not losing power...
The only good way to size injectors is with a wide band and a data log. If you run too large of an injector you are leaving performance on the table (more so at high elevations). Injectors should be matched to the combination.
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Old Jun 27, 2009 | 08:37 AM
  #27  
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Sorry if i thread jack for a post or two, but I was looking into fjic.com's 42lb bosch III injectors. Going to big would leave performance n the table, if that's completely true then I'm better going with 36lb ones? Set up is in the sig. Thanks
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Old Jun 27, 2009 | 12:11 PM
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Originally Posted by sdotlog
Sorry if i thread jack for a post or two, but I was looking into fjic.com's 42lb bosch III injectors. Going to big would leave performance n the table, if that's completely true then I'm better going with 36lb ones? Set up is in the sig. Thanks
Going to a bigger injector when your A/F ratio is good will gain you nothing. Where it will hurt you is in your low end performance at WOT. The only way to really know what you need is to use a wide band. It is my opinion (and experience) that running a bigger injector and reducing the duty cycle actually kills track times. That is why I still have 24 lb injectors in Gump (@ 50 PSI).
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Old Jun 27, 2009 | 12:23 PM
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Originally Posted by pyro719
RMCR? You must be in colorado springs. So am I. I'm Running 30# svo injectors and with my mods they are only at 50% IDC. Due to our high altitude we lose like 30% of our horsepower so we can get away with a smaller injector.
Yeah im in the springs, altitude sucks! But the scenery is worth it.
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Old Jun 27, 2009 | 12:25 PM
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Well thanks for all the help guys, ill throw it on the dyno and get back to ya.

Yes all you hijackers you may now ask your questions......wait, you already did! lol
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Old Jun 27, 2009 | 01:20 PM
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Originally Posted by 93TAJ.C.
Well thanks for all the help guys, ill throw it on the dyno and get back to ya.

Yes all you hijackers you may now ask your questions......wait, you already did! lol
=) I had to. Lol. Hmm leaning towards 36 then. Down the road planning to slap a procharger and ill find out what ill need then. I need to find a place that doesn't charge so muan arm and a leg out here in washington
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