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.

 

Siiiiiiicccckkkkk!!!!

 

So then you gotta ask, how high should we safely go.

 

finally..
now im definitely getting a ss/tc next year

 

As low as possible to meet the fuel demands for your build. Lol.

 

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!

 

Well ZZP is running 2750. Seems high, but at least we have someone trying it out.

 

That is WAYYYY to high. They are pushing the design limits plain and simple

 

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...

 

Yeah.... that is what I was hoping someone would notice!

We need those controls... so we can get rid of the high RPM lean condition. Especially at 7000+ rpm

 

The FRP sensor has a range of up to 2900psi, and if we take what the GM engineer said about sensor diagnostic range, that means that 2900 - 290, or 2610psi is likely the absolute maximum range, for the sensors anyway without modifying the FRP diagnostic parameters.

But who knows exactly how much pressure the rail and components can actually handle.

 

Once again... good work Vince! Now I need your product more than ever. But without money I can't have it.


:

 

Until things start breaking or leaking and catching on fire.

 

MUHAHA vince good stuff i see things are coming along with the program too .. lol

 

Yeah - that is a very big concern. Fuel getting loose under the hood at 2176+ psi would be VERY bad

 

Great stuff. Can't wait for one of the local trifecta guys to go big turbo. lol

 

You truly are on god status for our community now.

 

and he's not even done yet

 

Exactly. Sadly, I am sticking with HPT. If they don't crack if they don't crack it in a couple years, when i am ready for a big turbo, I'll give Vince a call. 'Till then, my HPT does what I need it to

 

They are "supposed" to be releasing this over the winter months... but who knows. They are dropping the ball big time.

But Vince thats good new for you!

 

Wow! sub'd!

I know people with turbo upgrades will be the main ones benefitting from this, but does this add any more tuning flexibility with the stock turbo?

 

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.

 

Well, that certainly would be appreciated. So I can expect that Fall of 2011? Thats what they mean by this winter, right?

 

Ok forgive my stupidity,I don't understand what any of this means.Does this mean there is a new tune with more power?

 

I would say that it should gain a few, nothing substantial though, since the turbo is flowing poo at 6k+.