Profec B Power Fc

[Rav]

Hi Guys,

Ok Just want some info on hi and low boost tune how does it work,

I have a Power FC and a Profec B, When they tune it on low boost Does it read a diffent map then when it's on hi boost, Because if they tuned it only on one of the settings wouldnt it lean or be to rich and not run as good as it should?

Thanks.

[paulr33]

yes it will read different, as the extra boost will usually dial in more airflow, which will affect the tune

you should just run one boost setting, the safest, max you can run and tune around that

[Adriano]

Good tune will be fine for both low and high boost

[Rav]

I have Garrett 25-60rs on low boost it set on 14psi and hi boost it's set to 18psi, When i get my car retuned what do you guys recomend a safe boost level would be.

[paulr33]

well yeah adrian is right, a good tune will make sure its suitable for both

it will just cost you more $ as the tuner will have to spend more time, they'll do it on say low boost

then get it all nice, and then press the high button and see how much has changed etc.

so it will work, just expect to pay a bit more i guess

ask them

[evil_weevil]

so....would you tune for high boost first, and low boost would be safe if high boost is safe?

[paulr33]

not necessarily no, the low boost tune could run across load cells that have too high timing

of course you would see this via the knock warning function and engine check light but its still possible, the afrs could be ratshit too

i dont think it would mattter which order you did it in

[evil_weevil]

ah fair enough!

Ive got the same combo...mine runs sweet but was just seeing what the process could have been!

I get slightly more knock on high boost than low, but still a low knock level

[Adriano]

In reality, a perfect tune on high boost should have a perfect low boost tune in it, but usually doesn't, there is no difference between part throttle high boost, and lower boost(same load cells) I always start with lowest boost, even no boost power runs and datalog it, then slowly increase the boost, tuning each one as i go. Gives optimum power at all boost/load levels

[Rav]

I would love to see my knock's, But i have no handcontroller.

[NYTSKY]

I had mine set for 16psi and 11psi.

As it was tuned for 16psi it ran a little richer on 11psi.