Trifecta gets it done: Fuel tables unlocked
11-06-2009, 05:09 PM
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Trifecta gets it done: Fuel tables unlocked
We are pleased to announce that we have successfully mapped out, modified and tested the tables that control the fuel rail pressure in the LNF ECM! We can now offer tuning that raises the fuel rail pressure for customers that need it.
Here's a teaser:
As you can see the maximum commanded fuel rail pressure in the tune is 2176psi, simply changing these values allows us to modify the fuel rail pressure.
The next chance we get, we're going to try modifying these values in the tune in our HHR SS on the dyno to see if they allow us to get more power. I am skeptical that increasing the rail pressure will unlock any more power with the stock turbo, but certainly for people running upgraded turbos, this tweak will be a must.
Here's a teaser:
As you can see the maximum commanded fuel rail pressure in the tune is 2176psi, simply changing these values allows us to modify the fuel rail pressure.
The next chance we get, we're going to try modifying these values in the tune in our HHR SS on the dyno to see if they allow us to get more power. I am skeptical that increasing the rail pressure will unlock any more power with the stock turbo, but certainly for people running upgraded turbos, this tweak will be a must.
11-06-2009, 05:16 PM
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2500 is the point of no return...
This is only needed for big turbo cars... the stock turbo doesn't flow enough to raise this demand... however there are other things in the fuel system we DO need access to!
Good work Vince!
This is only needed for big turbo cars... the stock turbo doesn't flow enough to raise this demand... however there are other things in the fuel system we DO need access to!
Good work Vince!
11-06-2009, 05:21 PM
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There is one interesting finding here that may be relevant to even stock cars. If you take a look at the value at the bottom right of the table, you'll see it's 2031, not 2176. That means at 6000+ RPM, at full load, the ECM actually decreases the rail pressure...
11-06-2009, 05:23 PM
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But who knows exactly how much pressure the rail and components can actually handle.
:
11-06-2009, 05:27 PM
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11-06-2009, 05:33 PM
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11-06-2009, 06:00 PM
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The bit about the stock tune lowering the fuel pressure at 6000 RPM is interesting also. I may simply try keeping the pressure at 2176psi and see if that extends the RPM potential of the engine at all.
11-06-2009, 06:14 PM
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Well, that certainly would be appreciated. So I can expect that Fall of 2011? Thats what they mean by this winter, right?
11-06-2009, 06:20 PM
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Maybe. We'll need to go to the dyno to find out. I'll try to do this in the next few weeks.
The bit about the stock tune lowering the fuel pressure at 6000 RPM is interesting also. I may simply try keeping the pressure at 2176psi and see if that extends the RPM potential of the engine at all.
The bit about the stock tune lowering the fuel pressure at 6000 RPM is interesting also. I may simply try keeping the pressure at 2176psi and see if that extends the RPM potential of the engine at all.