Pfc Read Knock Level Of 79

[ahh 33 s2]

i just checked all my levels on my hand controler. after getting the back out around a corner and hitting the rev limter in second my knock level read a max of 79.

my previous highest knock level was a 19 again when hitting the limter.

i had to double check what i was reading because it seemed a lot high

[VB-]

could be a dodgy batch of fuel? boost spiking? ambient temp when attempting the sideways action?

i didnt actually see a question in there but im assuming you wanna know why it was knocking so much? personally, i wouldnt be too worried about it as long as your not doing it 24/7, even then 79 isnt too high. from memory the PFC cuts in to warn you at about 60 which is well short of doing any damage

[ahh 33 s2]

yeh sorry mate.. what i was asking is firstly could this be a correct reading and secondly how bad of a reading is this.. the engine light did come on how ever when it happened. injector duty was below 90% and a/f was 5110 but i do have a Z32 afm so i dont think thats the prob.

what is a reading to be worried about

[noone]

engine light typically set at 60 knock and anything above that is a concern if it is only happening at the limiter easy fix dont hit the limiter

unless you see it all the time I wouldn't loose to much sleep if its pretty regular ask your tuner he might be able to put more fuel or less ignition at the limit point

might help?!?

Woulda thought 90% injector duty is pushing it too much too?

Edited May 15, 2007 by noone

[ahh 33 s2]

yeh i have a shit tune on it so when i get some money i will get it redone, have been planning to.

what exactly is knocking???

[RBwhatever]

yeh i have a shit tune on it so when i get some money i will get it redone, have been planning to.

what exactly is knocking???

Pinging, detonation, pre-ignition. All the same thing. Not good for the engine.....

[JonesyGTR]

Pinging, detonation, pre-ignition. All the same thing. Not good for the engine.....

Actually, pre-ignition is different to detonation. But all are bad for the engine!

Dan

[Hardman69]

a/f was 5110 but i do have a Z32 afm so i dont think thats the prob.

dude - that's 99% of Max.Signal . . . . . on a Z32 afm? what're U making, like, 300rwkw ? ! ? ! ? !

NIIIICE !

[ahh 33 s2]

dude - that's 99% of Max.Signal . . . . . on a Z32 afm? what're U making, like, 300rwkw ? ! ? ! ? !

NIIIICE !

ha ha

is it? thats not good.... i got 230hp

[benl1981]

sounds like you have an r33 afm not z32...

[supadan]

i cant be of much help but wen i had a shit tune i seen knoking of like 196 at 3000rpm in 4th lol