Hey Guys,
I have an issue with my rb20det which has me annoyed.
The problem is.
The car is tuned to run a max of 1.35bar on request. I have 5 different boost settings From 0.8 bar to 1.35. No matter what boost setting i have i wont get knock over ~35 on the hand controller for Wide Open Throttle. At this level i'm using LOAD point 15-16 on the maps.
But lets say i hesitate at about 4300rpm and ease off the throttle to about 2/3 or even 1/3 throttle, so i'm still accellerating and on boost. Knock will jump to rediculous number like 75, 93, 98 ....and so one......
I've done a map trace on the hand controller and found it happens around LOAD point 11 to 14 and between revs 4400 and 6000 (points N11 -N16).
So what i did was put it on the dyno to try find if it knocks at all. NO PROBLEM, ADDED more timing, got up ~60, added more and got my puff of smoke from the exhaust. So i have still abit up my sleeve.
Then on the freeway in 3rd was able to replicate the problem. So i pull out 3 degrees out of the entire map. Still get the same problem. I pull out another 3 and still getting the same thing. So i've pulled out 6 degree and i'm getting the same thing. At wide open throttle i was only getting a reading of 19 at WOT with 6 degrees less timing.
Anyone who can help me out.?? Offer any ideas????? Over sensitive knock sensors???
I remember reading Chris32 having a similar problem on his car, any progress?
Thanks
George
The mods are :
HKS 2530
GTR injectors
gtr pump
fuel reg
stock BOV
exhaust
cooler