5.3L with 8 psi Injector Size Suggestions?
01-18-2009, 06:13 PM
#1
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5.3L with 8 psi Injector Size Suggestions? I have a LM7 5.3L in a 1985 S10 with twin rear mount turbos, the trans is a 4l65e with a 3600 stall and manual valve body! the motor is bone stock other than headers and the 8 psi of boost! I want to upgrade my injectors before starting it! What size would you guys suggest? I am leaning towards 42lbs or 48 lbs, but i am no expert! Help me out people!
01-18-2009, 08:27 PM
#2
From the calculation below, your going to need 48 lb/hr @ 3 bar injectors and run 4 bar of fuel pressure. This will give you a little room for error but if your going to turn up the boost I'll need to recalculate.
Assumptions:
Boost referenced fuel system
4 bar (58 psi) fuel pressure
Calculation:
I would recommend some Bosch Design III's, but 48 lb/hr is the max size in that series. FICINJECTORS has these for $239 for a set of 8; great injectors at FICINJECTORS along with super prices and service.
Which type of injector connector does your wiring harness have; minitimer or USCAR?
Assumptions:
Boost referenced fuel system
4 bar (58 psi) fuel pressure
Calculation:
I would recommend some Bosch Design III's, but 48 lb/hr is the max size in that series. FICINJECTORS has these for $239 for a set of 8; great injectors at FICINJECTORS along with super prices and service.
Which type of injector connector does your wiring harness have; minitimer or USCAR?
01-18-2009, 08:55 PM
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Yea i didnt think to add, i do have a complete A1000 Aeromotive Fuel System with boost referenced regulator! I had planned on running 58psi and then 1:1 increase with boost! I have wastegates with 12.5lb springs could the 5.3 handle this with the right injector? I just thought 8psi would be easier on it! Its just a street/ show toy anyways! Here is a current pic also!
http://i147.photobucket.com/albums/r...post-paint.jpg
http://i147.photobucket.com/albums/r...ttin-close.jpg
http://i147.photobucket.com/albums/r...d/100_0773.jpg
http://i147.photobucket.com/albums/r...post-paint.jpg
http://i147.photobucket.com/albums/r...ttin-close.jpg
http://i147.photobucket.com/albums/r...d/100_0773.jpg
01-18-2009, 09:42 PM
#4
Yea i didnt think to add, i do have a complete A1000 Aeromotive Fuel System with boost referenced regulator! I had planned on running 58psi and then 1:1 increase with boost! I have wastegates with 12.5lb springs could the 5.3 handle this with the right injector? I just thought 8psi would be easier on it! Its just a street/ show toy anyways! Here is a current pic also!
01-19-2009, 05:15 PM
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I think i will just stick with the 48lbs, i am gonna order my harness this week from speartech and get this baby running! Its been a long one year with out a toy to play with!
01-26-2009, 09:38 PM
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Well got my injectors now, i went with the 48lb racetronix! But now its hurry up and wait, i ordered my Speartec Managment system today and they are on a two and half week shipping time! Damn! Good Things take time i guess!!
