when jr hit his number it was more of a race tune i believe. he lowered his boost for daily driving.
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Big Turbo Discussion Thread
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when jr hit his number it was more of a race tune i believe. he lowered his boost for daily driving.
chrisisnapping
Go Kart Champion
i don't think that's entirely accurate. I believed JR lowered his boost to take it easy on a turbo that already had over 10k miles on it as he was selling it and wanted to make sure the buyer wouldn't have to worry about a rebuild anytime soon.
Skully DD his 500whp car on race gas and MBC for a while. So there's that too.
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I turned the boost way down to as a courtesy is correct, its what any good used seller what do. I would want it done for me as well if I were to buy.
I did drive at 20psi daily before, it had plenty of power 410whp for me as a normal driver. Plus it was winter and had snow tires on so traction was an issue. Although I could hit the high boost button on the fly and have more power easily. Also, high boost was not a glory run at least on my car, no problems driving any where on it but I didn't need to. I also decided to sell shortly after and turned it all the way down.
My new setup will have a 18-20psi setting on the boost control for ~400whp and will have a high boost to what ever we can safely hit on 93 and W/M, won't know until I cross that bridge though.
And yes Skully did say he DD'd it on race fuel for a bit, but that gets $$$$$$.
skully
Ready to race!
chrisisnapping
Go Kart Champion
MBC not EBC
And boost is still set for kill mod :yikes:
whoops, my mistake. i updated my post :thumbsup:
BAM its mitch
Go Kart Champion
Well obviously with injectors you are going to get more power, the question is whether the lpfp was necessary.
Anyone with the Uni fueling upgrade care to comment on the pressure from your lpfp vs. stock?
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Knight
Ready to race!
He mentioned Fueling Kit, i assume he meant fueling system Unitronic TSI High Output Fuel System including the lpfp
BAM its mitch
Go Kart Champion
And I am saying it is very likely that all of his power increase could be attributed to the injectors and he needlessly paid more for the LPFP. To verify this or discredit this thought, I am asking if the LPFP upgrade raises the pressure or not.
Basically, I don't buy the fact that the LPFP upgrade is necessary (at least not yet)
But it doesn't matter anyway, because I'm not big turbo and don't plan to be. I'm just interested in the tech side of the discussion.
BAM its mitch
Go Kart Champion
The larger volume of air just allows them to run the same psi at higher engine speeds and also allows them to be at a better spot on the "efficiency island" which results in lower charge temps. Their real power comes at higher boost. The difference between that and fuel is compressibility. Fuel is effectively incompressible. With an incompressible fluid and a fixed volume pump (hpfp) downstream, pressure doesn't matter. So to answer your question, as far as the fuel system on our cars is concerned, with the hpfp in place you can't run different volumes of fuel with the same pressure.
Now, with that said, if you run higher pressure to the hpfp it is possible it would increase the efficiency of the hpfp which would result in more fuel. How much would be hard to say, but it likely wouldn't be much.
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mdhollis
Go Kart Champion
The problem with the technical details is no tuner wants to tell the other tuner what they are thinking and what their R&D came up with. Good post I learned a few things lol.
EDIT: I wil say though, I find it impossible to believe this pump does nothing. The 2 cars that installed it made nice power
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B
Bronson@APR
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You got it spot on, Perfect :thumbsup:
LPFP works on FSI's as well
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