Injector tuning
11-10-2007, 12:14 PM
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Injector tuning I know that there is a sticky about this; but the link is expired or something, so here goes. I have a set of 37# Racetronix injectors to go put in and need to know how to tune them. I went to Racetronix website and seen that they were 37.27 @ 43.5 psi. Since LS1s run at 58 psi, I put this in my HP tuners calculator and get a rating of 43.04#. Divide this by my 28.8# factory injector rating and get 1.49444. So I take my stock injector tables in my Flow Rate vs. KPA and multiply them by the 1.49444. Is this correct or not so easy?
11-10-2007, 05:05 PM
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no need to scale anything, just just use this spreadsheet (www.marcintology.com/tuning/injectors.xls) and just copy over the result row over to your hpt/efi software. just watch your units.
11-11-2007, 01:40 PM
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Thanks! One thing, when I tried to copy and paste this into my HP tuners it worked, but the values were slightly different. Will this be enough to throw it off and any reason why it's doing this?
11-11-2007, 02:26 PM
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Slightly different from the spreadsheet values. Even when I try to type them into the box manually it puts them to a different value. IE: @ 0 KPA the spreadsheet says 43.0364, when I paste the info into my file it goes to 43.03178.
