im running a return style external regulator with no vac hooked up .. should I run the flow rate straight across or should it get larger as it goes up scale: rate vs kpa.. and how do you know how much to increase.. running them at 46 straight across now and I don't think im correct... thanks in advance
67 camaro 6.0lq4 turbo build in process
89 mustang coupe ls1 80mmturbo, holley dominator efi on e85
02 lexus is300 lq4, cam,headers,fast 92 intake
and no there isnt anything in my yard unmodified
If there is no vacuum hooked to the regulator and it's just static at 46# of pressure the IFR should be sloped. Take whatever the injectors are rated at (making sure to know whether they are rated at 3 or 4 bar of pressure) and plug it into the formula here to find their new flow: https://www.rceng.com/technical.aspx That is their flow at atmospheric. Then use the injector spreadshee to find your new IFR values.
Bill Winters
Former owner/builder/tuner of the FarmVette
Out of the LSx tuning game
You should do the same for your injector offset table...it should not change relative to manifold pressure, it should only change relative to voltage now.
2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
2023 Durango Hellcat
Mike he said he wasn't vacuum referened so I don't think thats correct. But I had never thought of that when I converted to a vacuum/boost referenced return style system. Hmmmm.
Bill Winters
Former owner/builder/tuner of the FarmVette
Out of the LSx tuning game
where is the spreadsheet located for the ifr .. the 46# is the new flow. they are 39# injectors
67 camaro 6.0lq4 turbo build in process
89 mustang coupe ls1 80mmturbo, holley dominator efi on e85
02 lexus is300 lq4, cam,headers,fast 92 intake
and no there isnt anything in my yard unmodified
I'll help Bill out, here is the file :-)Originally Posted by strokedcoupe
Copy of EC_TUNE'S injectorscalels em3.xls[
Ed M
Last edited by mowton; 07-22-2015 at 07:50 AM.
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