ok guys here my problem i'm knockin pretty good and cant figure out how to controll this...right now my current mods are gm stage 2 with a 2.85 pulley..aem intake...pacesetters armor coated header...magnaflow exhaust...copper plugs gapped at .40..i'm seein bout 5 degree's of knock..but i am seein the same knock with the stage 2 pulley...all the knock starts above 6k rpms...to redline....would meth help this? ohh yea always run 91 thats all thats really avaible besides 100 and no data logs sorry

 

yes it would...

 

Isn't a 0.040 gap kind of high for an SS/SC? Or does it matter that the plugs are copper?

 

I run a .040 gap fine. But different cars react differently to the gap sizes.

 

.35 is the money spot...but knock is caused from the spark being too advanced...hes not misfiring

 

so should i regap to .35

 

ur not having a spark problem..ur timing is too advanced for ur car...whats ur afr?

 

its the stage 2 tune...one night i hit 9.9 and 10.0

 

how many miles do u have on ur car? have u changed the fuel filter? or the injectors

 

LOL

Classic Stage 2 tune. I guess GM figured running uber rich is the safe route.

 

20k on the car...have not changed the fuel filter..the injectors have bout 10k on them

 

its rich but it is also running hellavua lot of timing...

wait a min..u said even with the stg2 pulley its the same?

 

yea when i dyno'd i was running a 2.8 and the same other stuff and was knockin bout 5 degree's i put down 242hp 224tq

yea...

 

u have mounts right? of some sort..

 

tranny...i dont think its shift knock...cause it starts knockin at bout 6k if i do a 3rd gear pull

 

run ur tank empty then fill up with 87 octane...if its the same knock its false..if it goes up u have a tunage problem

 

the tuneage problem would have to be something with gm cause its a stock tune.


i'm gonna put stock mounts back intoo night and see if i knock

 

thats too much work haha...people see knock...some dont all depends on ur car bro thats why canned tunes suck

 

yea i'm not trippin bout the work..just wanna figure this **** out

 

Do what he said, switch to regular gas, see if it gets worse. If not, its from the mounts or some other false source.

 

same problom here with the knock on stage 2 tune. im even running the stock mounts and meth i do believe its a tuning problom.

 

stage 2 timing is way too advanced. when i first got hptuners i was seeing 21* of timing up top. Even though i wasnt seeing any KR, i still pulled 2* of timing from the high octane table.

you said you use 91, but gm states 93 is required for stage 2. that on top of the advanced timing is probably giving you problems. you DEFINITELY dont want to run a 2.85 pulley. keep the stage 2 pulley, pull a couple deg out of your high octane table and see if that doesnt help

 

I was seeing about the same degree of knock on my stage 2 tune, so i had to retard the timing a bit. there has to be somewhere , in your town that sells 93 jus try it and see what happens.

 

injectors? which yours you have 42s or 60s

my friend had alot of knock with his 2.8 and 42s... he should of been running 60s but he didnt listen to me

 

i have the exact same problem
around 5.8k to redline i get some knocking
and my mods are stage2, intake, gmpp exhaust and dual pass