Injector swap with H/C setup?
03-05-2007, 10:27 AM
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Injector swap with H/C setup? I'm currently putting in a FMS13, LS6 heads and LT's. I have 36# injectors to put in as well but someone told me not to until I get to the tune shop since the car will be runnning way too rich. The car is already running lean (14.1) and adding these mods will probably lean it even more.
Can I put the 36# now and run it for a 200-300 miles before I get it tune or not?
Can I put the 36# now and run it for a 200-300 miles before I get it tune or not?
03-06-2007, 10:12 AM
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Your stockers should be fine with the right tune, no need for 36lb/hr injectors. I am doing H/C/I/LT's myself very soon and wondered the same thing and came across this:
http://www.rceng.com/technical.htm
My goal is 45x at the flyhwheel and 43x at the rear wheels, so according to that calculator, my 28.8 stockers should be just fine running at a very mild 16.8 lb/hr at 80% pulse duration (duty cycle % ).
http://www.rceng.com/technical.htm
My goal is 45x at the flyhwheel and 43x at the rear wheels, so according to that calculator, my 28.8 stockers should be just fine running at a very mild 16.8 lb/hr at 80% pulse duration (duty cycle % ).
03-06-2007, 10:17 AM
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The stock injectors should be fine but you could put the 36# injectors in to be safe. However you dont want to put them in without a tune because the car will not idle.
03-06-2007, 10:18 AM
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Originally Posted by 2QUIK4U
The stock injectors should be fine but you could put the 36# injectors in to be safe. However you dont want to put them in without a tune because the car will not idle.
. But you want to get it tuned regardless.
03-06-2007, 10:44 AM
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Originally Posted by BlackHoleSunSS
Your stockers should be fine with the right tune, no need for 36lb/hr injectors. I am doing H/C/I/LT's myself very soon and wondered the same thing and came across this:
http://www.rceng.com/technical.htm
My goal is 45x at the flyhwheel and 43x at the rear wheels, so according to that calculator, my 28.8 stockers should be just fine running at a very mild 16.8 lb/hr at 80% pulse duration (duty cycle % ).
http://www.rceng.com/technical.htm
My goal is 45x at the flyhwheel and 43x at the rear wheels, so according to that calculator, my 28.8 stockers should be just fine running at a very mild 16.8 lb/hr at 80% pulse duration (duty cycle % ).
Humm. When I use this calculator, I will need 26# injectors for 400BHP. I have 26# at the moment.
Not that it's a big deal since I will be using 36# anyway. I just wanted to know if I can put them in now, do the break in and then the dyno tune or wait until I have driven to the actual dyno shop to swap them. Just affraid to cause damaged (Cylinder wall washing etc) driving with them for about 200 Miles.
Last edited by warp10; 03-06-2007 at 11:03 AM.
03-06-2007, 11:34 AM
#7
Yea there are ways around it but I would wait till your going to get it tuned to swap in the injectors. Also, there are conflicting opinions on the stock injectors. i know th earlier f-bodies came with the 28.8# injectors but i believe you have the 26.6# ones so i would say swap them out as sure you might not be running at 100% duty cycle but pushing the stockers too hard could result in fueling issues down the road. FWIW I used my stock 28.8's for my cam only setup but I was planning on some svo 30#er's if I went heads. I say swap them in though as you already have them, just make sure you will be getting it tuned in the near future.
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03-07-2007, 03:17 PM
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Originally Posted by 98Z28MASS
Yea there are ways around it but I would wait till your going to get it tuned to swap in the injectors. Also, there are conflicting opinions on the stock injectors. i know th earlier f-bodies came with the 28.8# injectors but i believe you have the 26.6# ones so i would say swap them out as sure you might not be running at 100% duty cycle but pushing the stockers too hard could result in fueling issues down the road. FWIW I used my stock 28.8's for my cam only setup but I was planning on some svo 30#er's if I went heads. I say swap them in though as you already have them, just make sure you will be getting it tuned in the near future.