Knock tables with Built Motors
#38
EvoM Guru
iTrader: (1)
Thank you. I think Im gonna raise the knock multiplier by 20% per jcsbanks thread, in a specific RPM range that seems to litter my knock counts 5-9 3000-4500 15-20 psi of boost, only during spool. Seems logical given the S2 cams with upgraded springs and retainers. Are Ti retainers quieter than cromoly or something similar?
I definitely dont want to blow a rod through the block, so Im following a lot of these threads in depth.
Knock voltage is the one I log to see the baseline noise my motor makes? Does boost make a motor noisier than no boost? theoretically i could rev my motor with no boost and see how much noise a given rpm produces then compare that to "with load"
tenatively all this including homemade det cans
I definitely dont want to blow a rod through the block, so Im following a lot of these threads in depth.
Knock voltage is the one I log to see the baseline noise my motor makes? Does boost make a motor noisier than no boost? theoretically i could rev my motor with no boost and see how much noise a given rpm produces then compare that to "with load"
tenatively all this including homemade det cans
Last edited by 211Ratsbud; Sep 19, 2012 at 01:21 PM.
#39
Evolved Member
iTrader: (30)
Knock voltage is the one I log to see the baseline noise my motor makes? Does boost make a motor noisier than no boost? theoretically i could rev my motor with no boost and see how much noise a given rpm produces then compare that to "with load"
tenatively all this including homemade det cans
tenatively all this including homemade det cans
aaron
#40
Guys, would a few counts of knock up top, between 6k and 7k have a major effect? My runs are clean but as soon as I get a little bit of temps going then I start to pick up 1-3 counts up top.
Cheers
Cheers
#42
Evolved Member
Yeah I'd drop a couple of degrees out of it if you are getting any knock. Evos tend to knock first run on spool (1-2 counts thats it) then should pull clean all the way through the pull every other time. Sounds like you are heatsoaking the cooler, pushing 22+psi up top on the stock 9 turbo I found will do this if you do multiple pulls/hills/track driving with a stock cooler.
#44
Former Sponsor
iTrader: (12)
Its incrediably hard to put into words actually. Everyone I know explains it differently lol. I think it sounds like a thin sheet of metal being wiggled around to simulate the sound of lightning, only at a higher pitch. I heard someone explain it as the sound of a high tension cable snapping. There are a few clips on youtube from 'TheKnockBox' and 'Phormula' and a few other companies with recorded clips.
-Jamie
-Jamie