BenKey Posted July 26, 2006 Report Share Posted July 26, 2006 Since I have shifted to aftermarket rails and fuel pressure regulator and no longer have a vacuum referenced FPR, do I need to increase my IFR by increase in kpa? This vs the flat IFR. Quote Link to comment Share on other sites More sharing options...
.justin. Posted July 26, 2006 Report Share Posted July 26, 2006 You will need to alter your IFR table. Higher vaccum = higher fuel flow. Use Redhardsupra's spreadsheet to figure this out, you can find it here: http://www.allmod.net/hpt/injectors.xls Quote Link to comment Share on other sites More sharing options...
BenKey Posted July 26, 2006 Author Report Share Posted July 26, 2006 I already had that, thanks. I was just needing confirmation that I was reading right - that I needed to do it. Quote Link to comment Share on other sites More sharing options...
.justin. Posted July 26, 2006 Report Share Posted July 26, 2006 I already had that, thanks. I was just needing confirmation that I was reading right - that I needed to do it. <{POST_SNAPBACK}> Ah, cool. Yep you do. Quote Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted July 26, 2006 Report Share Posted July 26, 2006 Your FPR doesn't take a vacuum signal Ben? Quote Link to comment Share on other sites More sharing options...
BenKey Posted July 26, 2006 Author Report Share Posted July 26, 2006 Your FPR doesn't take a vacuum signal Ben? <{POST_SNAPBACK}> There is a place for it on the FPR, but no provision on the FAST intake. If it can be resolved by tuning, then that to me would be much easier than trying to fab something for the intake. Appreciate the input, fellas. The '04s don't have a vacuum ref'd FPR either, right? Anyone have a stock "04 or above truck tune. I would just like to see how closely what I have put in my IFR mirrors what's in their's. Just curious. Quote Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted July 26, 2006 Report Share Posted July 26, 2006 (edited) Your FPR doesn't take a vacuum signal Ben? <{POST_SNAPBACK}> There is a place for it on the FPR, but no provision on the FAST intake. If it can be resolved by tuning, then that to me would be much easier than trying to fab something for the intake. Appreciate the input, fellas. The '04s don't have a vacuum ref'd FPR either, right? Anyone have a stock "04 or above truck tune. I would just like to see how closely what I have put in my IFR mirrors what's in their's. Just curious. <{POST_SNAPBACK}> So no vac line at all from the FAST? How weird... How are you going to run your brake MC? You are better off, IMO, plumbing a vac line than trying to convert to a non-ref'd IFR table. Edited July 26, 2006 by TurbochargedBerserker (see edit history) Quote Link to comment Share on other sites More sharing options...
BenKey Posted July 26, 2006 Author Report Share Posted July 26, 2006 So no vac line at all from the FAST? How weird... How are you going to run your brake MC? You are better off, IMO, plumbing a vac line than trying to convert to a non-ref'd IFR table. <{POST_SNAPBACK}> There is one for the vacuum assist on the MC. I know I could tee off of that if need be. I already scaled my table and really don't notice much diff tuning-wise in the little bit of VE tuning that I have done. What are the ups and downs of doing it either way? Quote Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted July 27, 2006 Report Share Posted July 27, 2006 Vac referenced is much more accurate and consistent IMO, although being NA it may not be as big an issue. Quote Link to comment Share on other sites More sharing options...
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