[GhostyM]

..

[enrita]

I suppose you have jb4 on map 5? If yes just up the safety to 18 and log to see all is good.

[YMB_M3]

Is there anything wrong with setting the over boost safety at something high? Let's say at like 20? Over boost is not targeted boost so I'm not sure how it would be harmful.

[enrita]

The jb4 G4 map 5 autotuning is capped to 17 psi so up max boost to 18 to fix.

[spool twice]

Originally Posted by kkashanchi

Is there anything wrong with setting the over boost safety at something high? Let's say at like 20? Over boost is not targeted boost so I'm not sure how it would be harmful.

On my G4 18ohm board, there wasn't a need to set over boost beyond 18psi was because it would never hit anything beyond 17.5psi.

You have to be more careful with the G5 board. If I set my overboost to 20psi, it'll hit 19.7psi (with meth) despite only having a meth additive to 50 (which in theory is supposed to cap out at 17.5psi). If I set it to 18.0, it'll target and hit 17.5psi consistently.

[spool twice]

Originally Posted by Chipped B6

I was getting down tuned to stock tune boost after pulling once in 3rd gear while running 60/40 92/E85. I'm now at 25% E85 and everything is a lot more reliable. But then I found out about raising the boost safety. I'm pulling only about 15.5 now, but with 40 mix E85 I was doing upwards of 17 or so.
If I set the boost safety at about 18psi instead of 17psi. Will it prevent cutting the power when I'm hitting upwards of 5K in third or second? My car is reacting REALLY well to the E85 at about 35% or 40% but then it seems I hit the boost safety all too often on map 5 with 8/21 firmware (upgrading to 9/1 later).

Yes, set it to 18 psi to be safe. You'll enjoy it more without having to restart the car

[GhostyM]

Originally Posted by spool twice

Yes, set it to 18 psi to be safe. You'll enjoy it more without having to restart the car

Well, my CEL is turning on at 100mph. I took it to the track last night.

I guess I have to turn off the open fuel auto looping and start setting it down increments of 5 until the CELs go away.

First run, really good, with a CEL 3/4 towards the end, cut off power and let me still use stock boost, but ran a 12.21. Tune only on stock Kumho SPT tires.
The rest. LIMP modes. I was pulling 7.8-7.9 1/8 miles at 91.xx mph, and then LIMP mode and cross the 1/4 mile line at 12.6-7 at 94mph.

[spool twice]

that's seriously quick for just a tune! Good times, despite the hiccups.

[YMB_M3]

Originally Posted by spool twice

On my G4 18ohm board, there wasn't a need to set over boost beyond 18psi was because it would never hit anything beyond 17.5psi.

You have to be more careful with the G5 board. If I set my overboost to 20psi, it'll hit 19.7psi (with meth) despite only having a meth additive to 50 (which in theory is supposed to cap out at 17.5psi). If I set it to 18.0, it'll target and hit 17.5psi consistently.

I had overboost set at 18psi then my car would revert to stock boost so I kept raising it until it stopped reverting to stock boost (20.0psi )
I think its the post shift spikes I've been getting that may be getting up to around 20psi.

[spool twice]

Originally Posted by kkashanchi

I had overboost set at 18psi then my car would revert to stock boost so I kept raising it until it stopped reverting to stock boost (20.0psi )
I think its the post shift spikes I've been getting that may be getting up to around 20psi.

it's possible, but post-shift spikes normally don't last a second, unless my logs are different from your's