Racetronix 37# injector question
01-07-2009, 04:56 PM
#1
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Racetronix 37# injector question I ordered the Racetronix 37# injectors from Thunder Racing a few months ago. I am finally about to install them but I notice that they say 40lb/hr on the side of them.
Racetronix does not list a 40# injector so I'm wondering what to do.
Also, the injectors don't say Racetronix on them, just Delphi, a part number, and 40 lb/hr.
Not sure if I should use the flow ratings for 37# @ 43.5psi or 40#
Racetronix does not list a 40# injector so I'm wondering what to do.
Also, the injectors don't say Racetronix on them, just Delphi, a part number, and 40 lb/hr.
Not sure if I should use the flow ratings for 37# @ 43.5psi or 40#
01-08-2009, 08:56 PM
#3
To the OP, do the injectors have a part number on them?
01-08-2009, 09:53 PM
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Nothing wrong with the Racetronix, but I would recommend some Bosch Design III's. Give FICINJECTORS a look before you make up your mind.
To the OP, do the injectors have a part number on them?
To the OP, do the injectors have a part number on them?
01-09-2009, 07:03 AM
#5
If a vendor is doing this, you can use the calculations at this site: http://www.rceng.com/technical.aspx to change back to the standard 3 bar rating, so you can correctly compare to other injectors.
For example, if a fuel injector were rated at 75 # at 4 bar, the 3 bar rating would actually be 65#, a significant difference.
And if you are seeking an injector rated 69 # at 3 bar, its rating at 4 bar would be almost 80 #.
Caveat emptor (Buyer Beware).
Last edited by koolaid_kid; 01-09-2009 at 07:15 AM.
sorry for the mix-up.
01-10-2009, 10:35 AM
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Be careful what you ask for. The industry standard for rating fuel injectors is 3 bar, or 43.5 p.s.i. The LS1 flows at 4 bar, or 58 p.s.i. Some vendors advertise their injectors at 4 bar, which artifically inflates the rating if you are seeking 3 bar numbers for your injectors.
If a vendor is doing this, you can use the calculations at this site: http://www.rceng.com/technical.aspx to change back to the standard 3 bar rating, so you can correctly compare to other injectors.
For example, if a fuel injector were rated at 75 # at 4 bar, the 3 bar rating would actually be 65#, a significant difference.
And if you are seeking an injector rated 69 # at 3 bar, its rating at 4 bar would be almost 80 #.
Caveat emptor (Buyer Beware).
If a vendor is doing this, you can use the calculations at this site: http://www.rceng.com/technical.aspx to change back to the standard 3 bar rating, so you can correctly compare to other injectors.
For example, if a fuel injector were rated at 75 # at 4 bar, the 3 bar rating would actually be 65#, a significant difference.
And if you are seeking an injector rated 69 # at 3 bar, its rating at 4 bar would be almost 80 #.
Caveat emptor (Buyer Beware).
So why then, do they say 40# on the side of the injector? Is that rated at 3.5bar?
I will get the part number off it for you guys when I get to where I'm building the car tonight.
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01-10-2009, 11:49 AM
#8
Thunder Racing lists the injectors rather well. It has all the Racetronix info posted on their site as far as the ratings. At 3bar they are 37# and at 4bar they are rated at 43#.
So why then, do they say 40# on the side of the injector? Is that rated at 3.5bar?
I will get the part number off it for you guys when I get to where I'm building the car tonight.
So why then, do they say 40# on the side of the injector? Is that rated at 3.5bar?
I will get the part number off it for you guys when I get to where I'm building the car tonight.
