[limeypride]

While I understand the principles of ICEs, I have little to no experience with practical hands-on work and, logically I guess, I know even less about the physics of tuning them. I will take a few calculated & progressive risks tweaking values/thresholds where I think I've grasped a sufficient understanding of risk:reward. From there and through logging and seat-of-the-pants assessment, I know what works for me in terms of products/support/preferences/etc. as well as where tinkering yielded an up side.

I'm currently tinkering with map 6's boost-by-RPM and the ability to subtract a fixed value from the boost target in the lower gears (newer firmware enabled that).

So, I was wondering: for folks with a F90 and a JB4, what did you find works best for you; for say max perf in DD situations or some other goal?

[Fuel-It!]

It always depends on the fuel being used and modifications to the vehicle.

[limeypride]

Originally Posted by Fuel-It!

It always depends on the fuel being used and modifications to the vehicle.

Of course, that goes without saying.

One possible answer could be "downpipes on 93 octane using map 6 with a flat 23psi; 1st gear at -2 for traction."

I'm not looking for principles, I'm interested in other folks actual examples with their JB setup and mods.

// EDIT: preferably examples that embrace the engineering principles and limitations such as fuel.

[gtenedio]

need more of these discussions going in the group.

op- whats your experience with the jb? hows the power band? ive seen some dynos and seems the turbos run out of breath early in the 5k range.

f80's were a bit jumpy in terms of turbo spooling on/off.

[limeypride]

Originally Posted by gtenedio

need more of these discussions going in the group.

op- whats your experience with the jb? hows the power band? ive seen some dynos and seems the turbos run out of breath early in the 5k range.

f80's were a bit jumpy in terms of turbo spooling on/off.

The JB4 works well. Its application ranges from novice to expert. The installation-complexity requirements increase across that same spectrum, i.e. simple perf gains == simple install, etc.

On pre-programmed maps, the power gains are linear. Personally, I prefer the 'kick in the pants' effect so I've been experimenting with & tweaking map 6 customizations. The amazing logging capabilities allow us insights far beyond anything else I've seen and the end result shocks most of my tune-informed passengers (especially in 4th gear).

I've posted dyno numbers and 1/4 mile times (sadly not track numbers) in other threads, too.

[mike@x-ph.com]

check with Burger Tuning on their recommended map 6 values

[limeypride]

Originally Posted by mike@x-ph.com

check with Burger Tuning on their recommended map 6 values

I did, I asked both Payam and Terry. They basically said use logging to figure out what works for my car, my fuel, etc. Terry did review the map 6 logs from the dyno run and said they looked fine.