I finally got around to installing the JB4 last week and didn't hesitate to jump into testing it on some higher maps after some initial logging.
I thought the install would be much harder but as a couple others have pointed out, there is a grommet next to the steering column to the left on RHD cars that will get you straight across the firewall. From there I ran it behind the heat shielding and out somewhere near the jump start terminals. Install is so clean, even with the engine cover off, you're likely to miss it unless you're specifically looking for it. The JB4 box just sits neatly on its flat side next to the intake. I stuck some furniture rubber protectors to the underside and between the intake to dampen any vibrations or anywhere there is a chance of rubbing or touching.
Loaded and tested MAP3 which is recommended for pump fuel which adds a few psi and some timing (indirectly). Logs were good so I jumped up to start using it for the reason I bought it
Maps 4&5 are recommended with higher octane fuels and I usually run an e30 mix anyway. Loaded Map5. Could really feel the difference now throughout the rev range but mainly mid-range.
I'm not a horsepower guy, I like functionality so I measure performance at a strip, track or going shopping . 1/4 mile didn't lie and I managed a 11.09s run, down from 11.34s.
Boost was still very conservative around 20-21psi peak and 18psi by redline, timing managed on this fuel is very health to say the least. Not too shabby overall.
Custom MAP6 is where it's at. Still a work in progress but a 10.92s run with a glitchy gear change and I let off before end of run. Boost level is still not where it can be and keep in mind this is with OPF's and cat still in place. There is definitely a 10.8s run in it as is but I'm feeling a 10.7s run soon if able to work through some correction factors.
I thought the install would be much harder but as a couple others have pointed out, there is a grommet next to the steering column to the left on RHD cars that will get you straight across the firewall. From there I ran it behind the heat shielding and out somewhere near the jump start terminals. Install is so clean, even with the engine cover off, you're likely to miss it unless you're specifically looking for it. The JB4 box just sits neatly on its flat side next to the intake. I stuck some furniture rubber protectors to the underside and between the intake to dampen any vibrations or anywhere there is a chance of rubbing or touching.
Loaded and tested MAP3 which is recommended for pump fuel which adds a few psi and some timing (indirectly). Logs were good so I jumped up to start using it for the reason I bought it
Maps 4&5 are recommended with higher octane fuels and I usually run an e30 mix anyway. Loaded Map5. Could really feel the difference now throughout the rev range but mainly mid-range.
I'm not a horsepower guy, I like functionality so I measure performance at a strip, track or going shopping . 1/4 mile didn't lie and I managed a 11.09s run, down from 11.34s.
Boost was still very conservative around 20-21psi peak and 18psi by redline, timing managed on this fuel is very health to say the least. Not too shabby overall.
Custom MAP6 is where it's at. Still a work in progress but a 10.92s run with a glitchy gear change and I let off before end of run. Boost level is still not where it can be and keep in mind this is with OPF's and cat still in place. There is definitely a 10.8s run in it as is but I'm feeling a 10.7s run soon if able to work through some correction factors.