boost by gear

[saxon]

hello, sorry if this answer is out there somewhere but i couldnt find it.

is there currently any tuning solution that allows you to dial in how much boost is allowed in each gear? with all the complaints of traction i would imagine boost by gear would be a necessity

[///M.Tonee]

I think only the JB4 stage 2 or 3 allows custom map and boost settings by RPM but not gears

[saxon]

Originally Posted by ///M.Tonee

I think only the JB4 stage 2 or 3 allows custom map and boost settings by RPM but not gears

while boost by rpm is great, imo nothing is as effective as boost by gear in a car with limited traction

[///M.Tonee]

Originally Posted by saxon

while boost by rpm is great, imo nothing is as effective as boost by gear in a car with limited traction

it can be done...if JB4 can read RPM via CAN, it can be programmed to also read current gear. This could be program into the firmware which is where JB4 shines since it has consistent development

[mike@x-ph.com]

The JB4 offer boost by gear ( 500 rpm)

[saxon]

Originally Posted by mike@x-ph.com

The JB4 offer boost by gear ( 500 rpm)

what do you mean by 500rpm?

[mike@x-ph.com]

Originally Posted by saxon

what do you mean by 500rpm?

you can set boost target for every 500 rpm

[Myaddiction]

It also lets you reduce boost at 30mph and 50mph. Allowing you to get traction before increasing the boost.

Firmware v3.5

1) Enabled the desperately needed torque limiting for launching. Although the field is labeled "max boost 1st & 2nd" it's actually "boost reduction 30mph & 50mph". As shown here these settings lower boost by 5psi under 30mph and 3psi under 50mph. The actual values can be fine tuned for your particular tires, track, and situation. But this has been working well for us so far during testing.

[saxon]

Originally Posted by mike@x-ph.com

you can set boost target for every 500 rpm

that would be boost by rpm, not boost by gear

a typical boost by gear will also allow boost by rpm

boost by gear will say allow 11psi 1st gear, 14psi 2nd gear, 3rd gear ramp up to 20psi as the max boost

this allows fine tuning of traction and ultimately the ability to adjust at the track if you just cant get traction down low (any car thats traction limited and high tq needs this feature IMO)

[mike@x-ph.com]

Originally Posted by saxon

that would be boost by rpm, not boost by gear

a typical boost by gear will also allow boost by rpm

boost by gear will say allow 11psi 1st gear, 14psi 2nd gear, 3rd gear ramp up to 20psi as the max boost

this allows fine tuning of traction and ultimately the ability to adjust at the track if you just cant get traction down low (any car thats traction limited and high tq needs this feature IMO)

LOL good catch.
The Jb4 allows boost by rpm and boost by gear.
Boost by rpm as i have explained it earlier and boost by gear as you can set the max boost for 30 mph and 50 mph as explained above.

[PeterPure]

With JB4 stage2 you can limit boost for gears 1 and 2 already now. Terry from BMS also posted today he had imple a boost limiter in 3rd gear for the F8x M3/M4 cars. I also requested it for N55 with 8 speed gearbox as even 3rd gear with stage2 turbo is asking a lot. I am sure he will put it in the next fw revision

[J. Dub]

Can WedgePerformance or proTUNING Freaks do this with cobb?
I'd love to have boost by gear

[mike@x-ph.com]

Originally Posted by J. Dub

Can WedgePerformance or proTUNING Freaks do this with cobb?
I'd love to have boost by gear

I dont think it can be done with flash tuning

[Mike@N54Tuning.com]

Originally Posted by J. Dub

Can WedgePerformance or proTUNING Freaks do this with cobb?
I'd love to have boost by gear

There is no COBB for the F8X, and I don't think any plans. COBB hasn't even released anything for the F-series N55 yet.

Email them and ask for it. Only way they will release a product if more and more people ask.

Right now JB4 is the only option to do what you are asking for in terms of boost by gear (Gear 1-3), and the JB only allows you to set it from stock boost to JB4 boost, so you can't reduce it lower then stock targets.

Mike