IFR Table ?...
10-08-2006, 09:32 AM
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IFR Table ?... So i've been having a lot of problems with the car since I put the 90/90 on, couldn't get it idling right, it was dropping out of open loop at wot, so this weekend I put a set of stock maf ends on thinkin the ported ones could've been causing a problem and it was still havin all the idle problems and I didn't take it out and test wot before one of my buddies came over for me to take a look at his car. I downloaded his tune into my computer to make some changes for wot timing, and since I had it, I started lookin at his ifr table to see where it was at compared to mine, cuz his car was running perfect and we have diff setups, but he still has a fairly large cam even though mine is bigger. So I put his table in mine and drop the tune in and bam, the car starts right up and idles, i'm like damn, it's a miracle! So later on I take the car out and she's pretty much startin right up and idling, but there's some surging issues still that I gotta try and work out, but I test out wot and she stays in open loop the entire time but was runnin pig rich. I also checked part throttle and the lterms are averaging out -7 and -9. Now before she was fouling every single plug and obviously was running rich, what i'm not understanding is that my buddies numbers on his ifr table were lower than I had mine, wouldn't that make it richer which should've made it worse, not better, right? I'm just wondering which way I should go with it to try and lean out the part throttle, cuz it's still havin a little idling issues on cold startup too.
10-08-2006, 10:18 AM
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Originally Posted by RedHardSupra
calculate your IFR using the spreadsheet in the stickies
10-08-2006, 05:49 PM
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here is it as an attachment
put in your inejctor size @ the specific rating like mine for example:
42.5# injectors rated at 43.5psi
then put in your fuel pressure (racetronix PnP) 58psi
and look at your numbers
put in your inejctor size @ the specific rating like mine for example:
42.5# injectors rated at 43.5psi
then put in your fuel pressure (racetronix PnP) 58psi
and look at your numbers
