[lamia2super]

??? where all the problems solved with a flash?

[rader1]

With Cobb fueling isn't the issue, small turbos are.

[AYF80]

He said Fuel PUMP, not fueling.

[D_Smiderreen]

Originally Posted by HPF 335i #1

He said Fuel PUMP, not fueling.

A bit off topic......have you entertained the idea of switching to a custom flash tune for you single turbo? It would be interesting to see what Cobb could do if they got their hands on your car.

[bulldog_yyc]

folks with upgraded turbos are already using Cobb alongside piggybacks because of its fueling advantage - beats modding the hardware IMO....

[rader1]

Originally Posted by HPF 335i #1

He said Fuel PUMP, not fueling.

Ahh, my bad. I just glanced over the title and read the post.

Apparently the HPFP is good to go. An upgraded LPFP or boost-a-pump may be in order based on what I've read from a few tuners.

[AYF80]

Originally Posted by D_Smiderreen

A bit off topic......have you entertained the idea of switching to a custom flash tune for you single turbo? It would be interesting to see what Cobb could do if they got their hands on your car.

Not at this point.

[garfi]

What about the 1M's hp fuel pump? I know that its different than ours...

[rader1]

Originally Posted by garfi

What about the 1M's hp fuel pump? I know that its different than ours...

The 1M's HPFP is now the standard pump. Any HPFP replacements will be done with e 1M's

[jippii ensio]

Originally Posted by HPF 335i #1

He said Fuel PUMP, not fueling.

But he meant fuel pump for fueling.

[AYF80]

Originally Posted by jippii ensio

But he meant fuel pump for fueling.

Yes, but the tune does not save the Pump. No matter what Tune you have, you need a good fuel pump.

[themyst]

My understanding is the actual fueling hardware is good for quite a bit more fuel than how the wideband bias approach the piggybacks use, and Cobb is the only one to properly take advantage. They can run 18 psi peak tapering to 16 at redline on 93 octane no meth with RB turbos with 12 AFRs straight across.

While this may not be a proper comparison to say a single turbo with even greater fueling requirements, it does show you there is a proper way to fuel these things and to be honest, a piggyback alone isn't it. While the fueling portion is resolved, there are other issues with bringing this out for public consumption that I am not comfortable getting into.

DISCLAIMER:
I run a piggyback (JB4 G5) standalone. I can run Map 2 (14.5 psi peak) with CPS enabled on 93 octane with no fuel trim issues or drama. With a TON of meth, it appears I can get away with 20 psi peak without leaning out. Then again, I have RBs, not a single turbo.

[rader1]

Originally Posted by HPF 335i #1

Yes, but the tune does not save the Pump. No matter what Tune you have, you need a good fuel pump.

True but some tunes make better use of that fuel pump.

[themyst]

Originally Posted by rader1

True but some tunes make better use of that fuel pump.

The Cobb maps some of us have tested maintain stock HPFP and LPFP pressure all while maintaining 12 AFR on upgraded twins. There's more in there for sure.

[rader1]

Originally Posted by themyst

The Cobb maps some of us have tested maintain stock HPFP and LPFP pressure all while maintaining 12 AFR on upgraded twins. There's more in there for sure.

That's some good stuff

[Tzu]

IDC FTW.

[MDORPHN]

Originally Posted by themyst

My understanding is the actual fueling hardware is good for quite a bit more fuel than how the wideband bias approach the piggybacks use, and Cobb is the only one to properly take advantage. They can run 18 psi peak tapering to 16 at redline on 93 octane no meth with RB turbos with 12 AFRs straight across.

While this may not be a proper comparison to say a single turbo with even greater fueling requirements, it does show you there is a proper way to fuel these things and to be honest, a piggyback alone isn't it. While the fueling portion is resolved, there are other issues with bringing this out for public consumption that I am not comfortable getting into.

DISCLAIMER:
I run a piggyback (JB4 G5) standalone. I can run Map 2 (14.5 psi peak) with CPS enabled on 93 octane with no fuel trim issues or drama. With a TON of meth, it appears I can get away with 20 psi peak without leaning out. Then again, I have RBs, not a single turbo.

With a custom Cobb tune --and without the JB4 G5 -- would you be able to run 18 psi peak tapering to 16 at redline with 12 AFRs?

Neil

[themyst]

Originally Posted by MDORPHN

With a custom Cobb tune --and without the JB4 G5 -- would you be able to run 18 psi peak tapering to 16 at redline with 12 AFRs?

Neil

Easily.

[jippii ensio]

Originally Posted by HPF 335i #1

Yes, but the tune does not save the Pump. No matter what Tune you have, you need a good fuel pump.

I think the discussion is not about saving the pump, but saving the engine from running too lean. For those flash tunes that flash the fueling parameter tables it is enough to run just a stock fuel pump. Tunes that do not flash the fueling, could benefit from upgraded fuel pumps as an alternative way to increase fueling for upgraded turbos etc.

So, what do you mean by a good fuel pump? An upgraded one? OP wonders if upgraded fuel pumps are under development or not and if there is a need for them.