007sevens
Active VIP Member
I get around 36-38 lbs of boost with my ISX, 550 hp 2050 tourque. One way to find out if your jake is working properly is to watch your boost guage when you toggle your jake. First leave your jake on stage 1 and you should get no boost while jaking, then set it on stage 2 and you should get 10 lbs or so boost, then try stage 3, you should get over 30 lbs when jaking hard at 1700 or 1800 rpm.
Well something is wrong cause I get 35 lbs pulling hard and maybe 25 lbs Jaking hard in stage 3.