How to scale the HPFP pressure sensor

[06Speed6]

There isnt a vid of this, but supposing that the 22% pressure increase does corrilate to ~11 lower injector PW, then we should get 11% more power.

Our injectors max around 420 crank hp, so 420*1.11=466 crank hp *.8 = 372whp @ 7000rpm.

Or, if we lower the rpm peak to 4500rpm with the formula 4500/7000=.642, 1 -.642 = .358 + 1 = 1.358 * 372whp = 505whp @ 4500rpm.

Or, if we lower the rpm peak to 5500rpm with the formule 5500/7000=.785, 1 -.785 = .215 + 1 = 1.215 * 372whp = 451whp @ 5500rpm.

Originally Posted by psychophyr Fuel Pressure Tuning - Mazda6 / Atenza dustin is right and dada is testing it out right now as well

Its funny that their dyno from last week when they got this fuel pressure idea all on their own, is dated yesterday.

[SSinstaller]

Originally Posted by 06Speed6 Its funny that their dyno from last week when they got this fuel pressure idea all on their own, is dated yesterday.

That is rather convienient..

[ElBartoRex]

Originally Posted by 06Speed6 There isnt a vid of this, but supposing that the 22% pressure increase does corrilate to ~11 lower injector PW, then we should get 11% more power. Our injectors max around 420 crank hp, so 420*1.11=466 crank hp *.8 = 372whp @ 7000rpm. Or, if we lower the rpm peak to 4500rpm with the formula 4500/7000=.642, 1 -.642 = .358 + 1 = 1.358 * 372whp = 505whp @ 4500rpm. Or, if we lower the rpm peak to 5500rpm with the formule 5500/7000=.785, 1 -.785 = .215 + 1 = 1.215 * 372whp = 451whp @ 5500rpm. Its funny that their dyno from last week when they got this fuel pressure idea all on their own, is dated yesterday.

I am not following, if this mod does the same thing that the SB can do, how come nobody with a SB has made 450whp yet?

[psychophyr]

Originally Posted by ElBartoRex I am not following, if this mod does the same thing that the SB can do, how come nobody with a SB has made 450whp yet?

The standback has apparently had the capability all along, but hasn't been expirimented with up until now.

To be honest I'm way more interested in what dustin can come up with than p3.

[cpolly69]

Originally Posted by psychophyr The standback has apparently had the capability all along, but hasn't been expirimented with up until now. To be honest I'm way more interested in what dustin can come up with than p3.

because wiring this circuit into your fuel system is a much easier/safer solution then opening a laptop?

i think the answer is that jordan isn't with cpe anymore - from my understanding lou was the one that origionally cracked the ecu for the ms3 and developed the sb - that's not to say that he was the one that got into it's full capabilities - i think jordan had a hand in tuning that robbie guy's car in college park md w/the sb - and to date it believe it's still the record for most hp - like 410 w/out nos or meth - i would have like to have seen the tables on that tune -
i think the real question is who has gone to cpe/p3 and really ponied up all money they want for all the stuff they can do - and what can they do now that jordan is gone and just the folks that are using what he developed are left?

so is that all that's left at cpe/p3 tuners who don't know about di???? - if i'm wrong prove me wrong - somebody's gotta know what's going on there with all the rumors of what' s to come...

when you show the average tuner around the sb (which i have done locally) - they think in terms of only what a piggy back can do, and they probably don't think in terms of the complex di system on the ms3 - they prob think in terms of what piggy backs do on port injected cars - which means stick to tricking the maf for fuel and tricking the cps/csps for timing, add fuel & if you get knock pull timing, and if you need more fuel just get bigger injectors - well the rules change with di - the injectors are already supposed to push tons of fuel - so then you have look at the complicated, most likely load based equation that is involved in fuel pressure and who really knows how to do that? why did lou put the table there if jordan didn't know how to use it?

look this idea to me is like using a maf clamp instead of tuning - you can get the job done, but it's like a broad sword when you need a razor -

no disrespect to dj here - he's way smarter then me to have come up with this, but i gotta say you have to be able to get further with the sb dialing in exactly what you need

granted this is some serious speculation too, but when all the factors are presented to me, these are the conclusions i draw...

[djuosnteisn]

Originally Posted by cpolly69 look this idea to me is like using a maf clamp instead of tuning - you can get the job done, but it's like a broad sword when you need a razor - no disrespect to dj here - he's way smarter then me to have come up with this, but i gotta say you have to be able to get further with the sb dialing in exactly what you need granted this is some serious speculation too, but when all the factors are presented to me, these are the conclusions i draw...

You'll get no disagreement from me, the sb definitely allows for much more fine tuning of the pressure than the "trick" i've come up with. But IMO, with the ap and a good tune, you can correctly account for the fueling offset without issue. Think of it kinda like bigger injectors. Are bigger injectors a "broad sword"? Sure. With "upped" pressure, our stock injectors will behave exactly like bigger injectors (hopefully without any problems, we'll see i guess, lol). 22% more flow across the board, theoretically. Bigger injectors require a re-tune, and so will this mod.

Part of me almost thinks that having the capability to vary the pressure at different load points, or rpm or whatever, only complicates this approach. Sometimes simpler is better, imo.