Acceptable Knock Levels

[mid life crisis]

hi i was just wondering what most people would call acceptable knock levels on a r33 with power fc. fmic and a hks 2535 running 15 pound boost ? since having the power pc fitted and tuned it has been back 3 time s cause of hight knock levels, so my question is how high is too high b4 damage is start to be done cheers dean

Edited March 14, 2007 by mid life crisis

[WilYawn]

http://www.skylinesaustralia.com/forums/in...howtopic=160008

[Guilt-Toy]

When i tune cars i tune them to show no more knock then 40 and then set the engine light to flash at 60 so you know you must back off then.

who is tuning the car for you? where are you ?

hi i was just wondering what most people would call acceptable knock levels on a r33 with power fc. fmic and a hks 2535 running 15 pound boost ? since having the power pc fitted and tuned it has been back 3 time s cause of hight knock levels, so my question is how high is too high b4 damage is start to be done cheers dean

[mid life crisis]

have spoken with the tuner here in sa and it apears to be only recording a high knock level when the car starts to hit the rev limiter. below the limiter it apears ok the engine light is not comming on but the knock level showed up at 73 .normal boosting it seems to be under 30 only peaks when the limiter is hit

[GTS-t VSPEC]

There can be additional mechanical noise when you hit the limiter, or the fact that the Apexi uses a fuel cut rather than an ignition cut may cause it to ping while on the limiter.

[Steve]

dont have a mechanical diff do you?

[Guilt-Toy]

hey

when you hit the limiter it will make noise and read high levels. as long as its not doing it on power then it should be ok. I would invest in a soft rev cut for your car like the gizmo rev limiter to help this (which is what i am doing)

Sometimes when i am really agressivly revving the engine to the limiter (massive backfire sound and flames from exhaust) it will read at 100 as well.

[GTS-t VSPEC]

So the gizmo rev limter provides an ignition cut ?

[GunMetalR33]

PFC Pro uses an ignition cut...

[Guilt-Toy]

Yep. which is much better then fuel cut

So the gizmo rev limter provides an ignition cut ?

[GTS-t VSPEC]

Guilt-toy, Got a link to the Gizmo ?

[Steve]

is it compatible with PFC? as I beleive the Bee-r limiter isnt?

[bilbo117]

is it compatible with PFC? as I beleive the Bee-r limiter isnt?

Also interested in knowing this as i believe the Gizzmo limiter/launch controller works the same.

[_8OO5TED_]

hmmm, i have a Bee*R rev limiter with my power FC on a rb25 and it works ok.

[Cake]

same here... powerfc with bee*r rev limiter, all good.

[Steve]

sweet, thanks for the info, was there any modification required apart from just wiring it up?

[OZ_Pomy]

Any one know where i can find one of these Bee R softcut limiters from and the going price?