Freshly installed JB4

Buttertits · 08-13-2014, 06:18 PM

So I just installed my JB4 last week and I am loving it. I use ~E30 and map 5 is very strong, holds 15psi very well.

I do notice however that under WOT boost pressure will increase to about 10-11 psi, hesitate for a half second or less, and then proceed to boost up to the 15 psi nicely.

I have read post on here that the ISO firmware will build/control intake pressure more smoothly.

Anyone else have experience with this?

weehe126 · 08-13-2014, 08:46 PM

would need log to really help you

Jsoboti · 08-13-2014, 09:06 PM

Quote:

Originally Posted by Buttertits

So I just installed my JB4 last week and I am loving it. I use ~E30 and map 5 is very strong, holds 15psi very well.

I do notice however that under WOT boost pressure will increase to about 10-11 psi, hesitate for a half second or less, and then proceed to boost up to the 15 psi nicely.

I have read post on here that the ISO firmware will build/control intake pressure more smoothly.

Anyone else have experience with this?

Take a log and we'll be able to see more. But my power delivery with the ISO mod is much more smooth

mike@x-ph.com · 08-14-2014, 11:32 AM

+1 for logs

08-13-2014, 06:18 PM	#1
Buttertits Enlisted Member 8 Rep 40 Posts Drives: 2011 E90 335i M Sport Join Date: Feb 2014 Location: Phoenix Az iTrader: (0)	Freshly installed JB4 - ISO question So I just installed my JB4 last week and I am loving it. I use ~E30 and map 5 is very strong, holds 15psi very well. I do notice however that under WOT boost pressure will increase to about 10-11 psi, hesitate for a half second or less, and then proceed to boost up to the 15 psi nicely. I have read post on here that the ISO firmware will build/control intake pressure more smoothly. Anyone else have experience with this?
	Appreciate 0 Tweet Quote

08-13-2014, 08:46 PM	#2
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	would need log to really help you
	Appreciate 0 Quote

08-14-2014, 11:32 AM	#4
mike@x-ph.com BimmerPost Supporting Vendor 24198 Rep 190,805 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	+1 for logs __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
	Appreciate 0 Quote