Is 30 counts of knock on a 1G cool?

[BOOstGhost]

i have 30 counts of knock at 5000rpm with my 02-R 0.89V. Is that ok?

 

[leakyfaucet]

That's a lot.

 

[crazykid]

as far as i understand... you should never have ANY knock... any knock at all is BAD... let alone 30 counts...

 

[kpt4321]

30 counts of knock means you are losing 10.5 degrees of timing advance. That's very bad, probably worth quite a bit more than 20-30 horsepower.

 

[BOOstGhost]

how would i get rid of knock?

 

[kpt4321]

The solution to knock depends on why you have it in the first place. You could be too lean, you could have charge temps that are too high, and you could have too much timing advance.

What are the car's mods, and what boost pressure are you running?

 

[WhiteTsiAwd]

Make sure and check your Base timing. That makes a big difference. But def. listen to kpt4321, he knows what hes talkin about.

 

[ItsStockOfficer]

as far as i understand... you should never have ANY knock... any knock at all is BAD... let alone 30 counts...

Some knock is fine.

 

[kpt4321]

Some knock is fine.

Don't make blanket statements.

Sometimes it is fine. Sometimes it is a good thing. Sometimes it has no positive benefits at all.

 

[mavisky]

the ideal is 0 knock at all, but the ecu doesn't pull timing until like 7 counts of knock. if you can get it to the point where you only have random small knock counts of up to 3 or so at a few spikes then you're probably doing ok.

 

[1fastlaser]

Dont tune off o2 volts eather.

I find that a bad and very guessy way of knowing rich or lean

 

[kpt4321]

the ideal is 0 knock at all, but the ecu doesn't pull timing until like 7 counts of knock. if you can get it to the point where you only have random small knock counts of up to 3 or so at a few spikes then you're probably doing ok.

That's not true.

The amount of knock retard is directely proportional to the knock sum. Roughly, for every 3 knock sum, you get one degree of timing retard. If your knock sum is 6, you have about 2 degrees of retard.

The actual conversion factor is closer to knock sum * 0.35.

 

[ItsStockOfficer]

Don't make blanket statements.

Sometimes it is fine. Sometimes it is a good thing. Sometimes it has no positive benefits at all.

I never said it was positive, or beneficial. Just that a few counts is fine. Not going to blow anything up. Completely expected, impossible to avoid on occasion.

 

[laserrs]

i have 30 counts of knock at 5000rpm with my 02-R 0.89V. Is that ok?

30 counts is alot. it will retard your timming but u can disable your knock sensor if you want which is wut i do and i let it have jus under 15 counts . you will get the most power with about 8-10 counts

 

[mavisky]

30 counts is alot. it will retard your timming but u can disable your knock sensor if you want which is wut i do and i let it have jus under 15 counts . you will get the most power with about 8-10 counts

this is the most utterly rediculous idea i've ever heard. your car comes equipped with a device that will retard timing in order to save your motor should you do something stupid to it so leave the knock sensor plugged in. there's no good reason to ever unplug it.

 

[Quasimondo]

15 is still an excessive amount of knock. I live with a knock count of 4 - 6 only because I have no piggyback unit to further tune my engine.

Boostghost, we need more information from you.

What kind of fuel are you running? (I know it's a stupid question, but I've seen people complain about high knock counts only to find out that they were running 89 octane)

How much boost are you pushing? Is it from a stock 14B, or something bigger?

Give us a log of your runs. RPM, Knock Count, O2 readings (most say they're worthless, but the more info we have, the better), Fuel trims for low, med, & high, injector pulse width (or injector duty cycle if your logger can record that), intake temp, coolant temp.

Some stuff to consider:

Check for vacum leaks. Most vacum leaks will cause you to lose power, but if you have a leak at the lines that go from the manifold to the solenoid and fuel pres. regulator, it's not going to bump up your fuel pressure like it's supposed to under boost.

When was the last time you changed your fuel filter? If you didn't re-wire your fuel pump, you can try doing that so the pump draws it's current directly from the battery.

If you don't have access to a fuel pessure meter, get a pair of vice grips, and some zip ties. Use the vice grip to pinch down halfway on the fuel return line, and secure the vice grips to a nearby line. Use lots of zip ties if you're going to do this. If your knock count is reduced, then it's definitely your fuel pressure regulator.

If it helps, I had the same problem you did. I traced my problem to a bad fuel pressure regulator and incorrectly set base timing. I also had a nice pile of dead leaves blocking the flow to my intercooler.

Hope this helps

 

[kpt4321]

I never said it was positive, or beneficial. Just that a few counts is fine. Not going to blow anything up. Completely expected, impossible to avoid on occasion.

Well, in my opinion, if you're losing power, it's not "fine."

 

[laserrs]

this is the most utterly rediculous idea i've ever heard. your car comes equipped with a device that will retard timing in order to save your motor should you do something stupid to it so leave the knock sensor plugged in. there's no good reason to ever unplug it.

You need alot more than 10 to 15 counts to blow your motor, with no knock i get no power, my timming is alwasy at 20 to 25 with it removed and i let it knock under 15 ive got 3 turbo dsms i'l know when my engine is knocking to mucha nd when it will blow. i dont like getting 300 kms out of a full tank which is what i get when i am running 15 psi with the sensor plugged in because it retards theres nothing wrong with my motor the head is taken down a fair bit and ive got a stock intercooler thats why i get a fair bit of knock at 15 psi.

 

[skibumexicano]

I'm having the same problem..but My knock is very random..some days...no knock..other days..it's all the time..I blame my knock on, not enough fuel...either way..Good luck man...Check your base timing like they said...dan

 

[kpt4321]

You need alot more than 10 to 15 counts to blow your motor, with no knock i get no power, my timming is alwasy at 20 to 25 with it removed and i let it knock under 15 ive got 3 turbo dsms i'l know when my engine is knocking to mucha nd when it will blow. i dont like getting 300 kms out of a full tank which is what i get when i am running 15 psi with the sensor plugged in because it retards theres nothing wrong with my motor the head is taken down a fair bit and ive got a stock intercooler thats why i get a fair bit of knock at 15 psi.

1. On your keyboard, next to the comma, there is a little dot called a period. Give it a shot.

2. Also on the keyboard, there is a big key to the left of the "Z" and to the right of the "?." Try that one too.

3. You're wrong. You can't "tell" when a motor has too much knock if the knock sensor is unplugged.

 

[ItsStockOfficer]

3. You're wrong. You can't "tell" when a motor has too much knock if the knock sensor is unplugged.

You can when it's audible.

 

[kpt4321]

You can when it's audible.

The day I can hear any kind of detonation in any DSM that isn't concurrent with pistons melting and coming out the exhaust, will probably be the same day I wake up with 18 supermodels in bed with me.

 

[mavisky]

You need alot more than 10 to 15 counts to blow your motor, with no knock i get no power, my timming is alwasy at 20 to 25 with it removed and i let it knock under 15 ive got 3 turbo dsms i'l know when my engine is knocking to mucha nd when it will blow. i dont like getting 300 kms out of a full tank which is what i get when i am running 15 psi with the sensor plugged in because it retards theres nothing wrong with my motor the head is taken down a fair bit and ive got a stock intercooler thats why i get a fair bit of knock at 15 psi.

this is what happens when you don't pay attention to your knock sensor. i had done 2 pulls on the 1/4 mile logging this and i had no knock at all, so like an idiot i figured i'd be good for a long highway pull. wrong. if i could've watched the knock sensor with a logger i would've seen this thing knocking before any of this happened.

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[L2RTSiAWD]

I swear, you guys argue about knock, like a bunch of old maids. :laugh:

I can answer the original thread starters question......No.

 

[ItsStockOfficer]

The day I can hear any kind of detonation in any DSM that isn't concurrent with pistons melting and coming out the exhaust, will probably be the same day I wake up with 18 supermodels in bed with me.

Heh, I tested EMS 0001 for 1g's....Before I figured out that the EMS is calibrated for a 2g knock sensor and that they have entirely different ranges, I got lots of it, at idle even, scary sound=)

Mavisky, that's quite odd.