JB4 Map 2 Question on 93 Octane Fuel and changing lower boost values...

[Team Tonka]

Has anyone running 93oct increased the boost values in the lower RPM ranges - if so, what would you recommend for MAP 2 on 93 Octane for a starting point? I'm AWD.

Below are the boost values for Map 2.

psi_curve[0] = 4.0 '1500
psi_curve[1] = 4.0 '2000
psi_curve[2] = 4.0 '2500
psi_curve[3] = 4.5 '3000
psi_curve[4] = 5.0 '3500
psi_curve[5] = 5.0 '4000
psi_curve[6] = 5.0 '4500
psi_curve[7] = 4.5 '5000
psi_curve[8] = 4.0 '5500
psi_curve[9] = 4.0 '6000
psi_curve[10] = 3.5 '6500
psi_curve[11] = 3.5 '7000

 

[Gtecko]

Why did you change the boost value ?
did you do a run and log it ? Terry would be the one looking at the numbers and telling you if they are okay

 

[Team Tonka]

On Map 2 currently I'm fine at 93oct. But, if I can turn it up a little at lower RPM's that would be nice. Hence why I'm asking if others have done it successfully.....

 

[Gtecko]

I seen some do it and then undo it ... best way it really to do a log and send or post the CVS for Terry to review

 

[StungBlueGT2]

Has anyone running 93oct increased the boost values in the lower RPM ranges - if so, what would you recommend for MAP 2 on 93 Octane for a starting point? I'm AWD.

Below are the boost values for Map 2.

psi_curve[0] = 4.0 '1500
psi_curve[1] = 4.0 '2000
psi_curve[2] = 4.0 '2500
psi_curve[3] = 4.5 '3000
psi_curve[4] = 5.0 '3500
psi_curve[5] = 5.0 '4000
psi_curve[6] = 5.0 '4500
psi_curve[7] = 4.5 '5000
psi_curve[8] = 4.0 '5500
psi_curve[9] = 4.0 '6000
psi_curve[10] = 3.5 '6500
psi_curve[11] = 3.5 '7000

I know of a couple people that increase boost at lower rpms and no issues yet, but it does also increase the chances of LSPI. Be careful and keep checking logs to make sure ignition timings isn’t dropping.

Also just curious where you got that psi curve for map2? I’d love to see the differences between map2, 3, 5 & 7.

 

[Team Tonka]

I know of a couple people that increase boost at lower rpms and no issues yet, but it does also increase the chances of LSPI. Be careful and keep checking logs to make sure ignition timings isn’t dropping.

Also just curious where you got that psi curve for map2? I’d love to see the differences between map2, 3, 5 & 7.

PSI curve came from Terry....

 

[StungBlueGT2]

PSI curve came from Terry....

Thanks and didn’t know the psi curve for actual maps were available publicly. In that case @Terry@BMS can you PLEASE share the psi curves for map3, 5 & 7?