Put the car on the dyno today. Wondering how much more power I could make with a proper tune

[twinturbos]

The numbers are decent enough. The power delivery is very weird... overboosts, cuts fuel, goes back at it.
Running DOCRACE with 6266BB
fuel-it stage 2 LPFP
R8 coilpacks
New HPFP
New index 12 Injectors
94 + 50/50 WMI
JB4+MHD BEF map 4 23psi
555whp, 444wtq on a mustang dyno.

What do you think ?
I'll grab the logs from my other phone and post

 

[RuskiRacer]

The numbers are decent enough. The power delivery is very weird... overboosts, cuts fuel, goes back at it.
Running DOCRACE with 6266BB
fuel-it stage 2 LPFP
R8 coilpacks
New HPFP
New index 12 Injectors
94 + 50/50 WMI
JB4+MHD BEF map 4 23psi
555whp, 444wtq on a mustang dyno.

What do you think ?
I'll grab the logs from my other phone and post

Seems about right my friend made 630 whp on 24psi on full e85. Doc race precision 6266jb, dual walbro 525, helix overdrive, index 12, precision race works coils

 

[JStock_BTN54]

Numbers are on point I made 640 on my fftec kit same turbo on ~23psi e40 mix.

 

[yuli8466]

The numbers are decent enough. The power delivery is very weird... overboosts, cuts fuel, goes back at it.
Running DOCRACE with 6266BB
fuel-it stage 2 LPFP
R8 coilpacks
New HPFP
New index 12 Injectors
94 + 50/50 WMI
JB4+MHD BEF map 4 23psi
555whp, 444wtq on a mustang dyno.

What do you think ?
I'll grab the logs from my other phone and post

mustang dyno read are different from dynojet.

 

[Idratherbesurfing]

Ditch the jb4

 

[veer90]

Ditch the jb4

Most of the time is user error lol

Mustang Dyno 555 whp is respectable for pump gas + meth. Also riskier to push it than with E mix or full E85.

 

[Torgus]

Well a 'proper' tune is small money so I see no reason not to. Especially if you can't figure out the "power delivery is very weird... overboosts, cuts fuel, goes back at it." issues you are having. Given what you have spent a custom tune will be able to get more out of your set up than an off the shelf back end flash + JB4 I would think.

Once you post the logs perhaps something will become apparent.

 

[Payam@BMS]

Can you provide a log? We have probably 1k users out now on ST kits using the JB4, no issues at all.

 

[twinturbos]

Can you provide a log? We have probably 1k users out now on ST kits using the JB4, no issues at all.

Not saying the JB4 is the issue I actually would like to keep it but the tune seems inconsistent. Need to fine tune it.

datazap.me | LOLBYE | Dyno 23psi

datazap.me

 

[RuskiRacer]

Can you provide a log? We have probably 1k users out now on ST kits using the JB4, no issues at all.

What about the issue we're you over boost ever so slightly throws you back into a lower map ?

 

[Rob09msport]

Trebilla is who you should contact. He is great with jb4 tunes

 

[Payam@BMS]

Not saying the JB4 is the issue I actually would like to keep it but the tune seems inconsistent. Need to fine tune it.

datazap.me | LOLBYE | Dyno 23psi

datazap.me

Log looks okay.

I think I see the issue with boost control, duty bias is not set to 50 as it should be across the board.
Set that, lower FF to 10 and get another log. We'll have to rework that side, a couple logs back and forth.

 

[Payam@BMS]

What about the issue we're you over boost ever so slightly throws you back into a lower map ?

You mean a safety feature? Sounds like you're having issues with boost control as well.
Post a log on N54tech in the support section or email support. We'll take care of you.

[email protected]

 

[twinturbos]

Log looks okay.

I think I see the issue with boost control, duty bias is not set to 50 as it should be across the board.
Set that, lower FF to 10 and get another log. We'll have to rework that side, a couple logs back and forth.

Thanks ill try tonight

 

[DamnDatsun]

Trebilla is who you should contact. He is great with jb4 tunes

+1 Trebilla did the jb4 tune on my 6466 single turbo. Couldn't be happier.