CBRD

iTrader: (60)

try higher octane on same map-

report back-

also-

pressure test after cam install? just to be sure?

thebluesky

iTrader: (28)

Maybe this is a bit of a dumb question, but have you done anything to rule out an issue with the knock sensor itself?

domyz

iTrader: (6)

Will definitely do both tests. Thanks

I didn't touch to anything physically. But it might be a good idea to log knock voltage to see if it's overall engine noise raising or a real knock spike.
Added to my to do list

Biggy VIII

3" exhaust will definately help too.

thebluesky

iTrader: (28)

I just went through an issue of this recently and figured out my wiring had been somehow nicked pretty good.

stunt2

iTrader: (8)

^^ this
and also check the sensor itself isn't loose
+ check if timing marks are aligned correctly

domyz

iTrader: (6)

For timing marks I checked them (both cams and crank) and they were right. For knock sensor I'll check but it is not something that been touched.

evoredy

iTrader: (7)

It might be early, but any luck with the octane? That will tell you a lot about if the issue could be poor timing curve/fuel curve/or just poor fuel altogether.

What does your knock log look like?

001122334433221100

or

2 1 3 5 0 0 2 1 0 4 etc.

With a 35R on 91 octane, 24PSI, GSC 272's, HFC, Apexi Noir CBE, I was counting up to 10 degrees up top at 7500 to not trip the knock light with OEM knock settings. Power level sucked. Hopefully the exhaust and cat-delete will help out some too.

Just post the darn log! Just kidding. Good luck.

minimarine09

iTrader: (18)

in for results, trying to learn

domyz

iTrader: (6)

Here are some of the knock events, that were still happening with timing not very agressive. Knock happens as soon as the ECU ignite at 8* at about 6100RPM (which is low advance). I'm now 21psi at 6000 rpm and this is not happening anymore. But this is counterproductive to me: the car isn't nearly faster as I expect it from new cams.








I tried running less timing (6*) with same boost (24psi flat) and it still knocked pretty bad:





Anyway, like I said 10 times, I expect the car to take more timing with a new exhaust.

PureDrivePerformance

Log knock voltage and post back up. What are your knock sensor settings set at? Can you post a screen shot or are they stock?

Are all these pulls done on the same tank of 91 oct? It seems like bad gas.

evoredy

iTrader: (7)

That or a persistent/odd harmonics that takes place at 6K consistently.

domyz

iTrader: (6)

Like I said I plan to log knock sensor voltage.
Knock setting (filters, multipliers) are stock.
They're made from 2 different tanks of 91, but they come from the same place. Good idea I'll try to fill the car at a different brand/station.

Yes looks odd, always at the same RPM.

foxbat

I think this is normal for 91oct, I checked a 91 tune that I made a few years ago, timing was around 5 @ 6000/260. that car had a gt3037 turbo & 272cams.