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A Must Read For Budding Tuners, Or Those Interested In "knock"

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in Engines & Forced Induction

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rob82 Mentor

rob82

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I found on my gtr apexi djetro on a low load ping read about 20. I occasionally still get over 100 on crank I presume from starter motor mesh? The base ignition map has a lot of low load advance. After some fiddling now I never get more than 12. Reset max timing to no more than 32 (was 48) and varified number with timing light. Bp98 always used.

I've heard plenty of RB engine's ping at low rpm high load and the knock sensor hasn't reacted, thats tuning with either PFC or factory ECU. I wouldn't recommend tuning based off feedback from the OEM knock sensor, use it only as a guide along with a proper chassis ear and good understanding of what an engine does when it is detonating.

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This is probably one of the best and clearly written explanations which will correlate with even the less mechanically minded. Engine Basics: Detonation and Pre-Ignition by Allen W. Cline All high

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Ive been using this system for awhile now. But havent seen much press on it. but today i came across this great spiel on it from high performance academy..

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I was informed there was a few broken links to the sound files so i have linked them to the reseller of the knock box who has some great examples. http://theknockbox.com.au/the-knock-box/sound-record

t_revz Grand Master

t_revz

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I've heard plenty of RB engine's ping at low rpm high load and the knock sensor hasn't reacted, thats tuning with either PFC or factory Ecu

Rebuilt engines with power FC?

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STATUS Grand Master

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I've heard plenty of RB engine's ping at low rpm high load and the knock sensor hasn't reacted, thats tuning with either PFC or factory ECU. I wouldn't recommend tuning based off feedback from the OEM knock sensor, use it only as a guide along with a proper chassis ear and good understanding of what an engine does when it is detonating.

^^ Spot on, definitely the best advice.
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STATUS Grand Master

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Bump for Trent

Gizzmo showed me this so i shelved my kit.

https://fbexternal-a.akamaihd.net/safe_image.php?d=AQCk45QmLNoxrRQg&url=https%3A%2F%2Ffbcdn-vthumb-a.akamaihd.net%2Fhvthumb-ak-snc7%2Fs403x403%2F409854_4006399591618_4006397111556_45510_558_b.jpg&jq=100

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  • 11 months later...
XRATED Veteran

XRATED

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The two better tuners locally to me both use 'knock box'.

What hardware are you guys going to? Phormula?

CHeers

Justin

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STATUS Grand Master

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Ive been using this system for awhile now. But havent seen much press on it.

but today i came across this great spiel on it from high performance academy..

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  • 6 months later...
STATUS Grand Master

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The two better tuners locally to me both use 'knock box'.

What hardware are you guys going to? Phormula?

CHeers

Justin

Justin, ive found the knock box to be the most reliable as a full time tuning option as it can be quickly swapped fom engine to engine easily.

The PLEX unit is awesome but is actually painful to use. It takes a long time to set up to get the same accuracy as the knock box, therefore we only use the PLEX system on big budget big HP setups where the customer is happy to pay for the extra time.

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Kinks Grand Master

Kinks

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Those are great samples, thanks Trent. Sounds like very heavy det too, nasty. Would be interesting to hear varying levels of knock starting with very mild.. eg start from knock-free baseline and then adding 2 degrees in timing every 5 seconds and then train yourself to listen for light knocking as well.

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tridentt150v Grand Master

tridentt150v

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On another forum they are saying that if you use ~original at the end of the link then it works again Trent.  I haven't tried it but several have vouched that it works.

But Photobucket will probably end up closing that loophole eventually as well.

On another forum that I frequent, Street Triple, I informed the admin guys of a workaround for the Photobucket ransom demand.
The dodge was to place the string ~original after .jpg in the Photobucket URL.
Using that, they were able to download all the pictures.
They then modified all threads that used Photobucket links to point to the downloaded pictures that were now stored on their server.
The resulting pictures are stored in a gallery, which is now used instead of Photobucket.
Kudos to that site's admin people.

 

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STATUS Grand Master

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All the embedded photos are with photobucket, due to a recent owner change they have decided to charge for hosting (399 usd a year)

 

if you use CHROME this work around will allow you to view allthe missing images.

https://chrome.google.com/webstore/detail/photobucket-embed-fix/naolkcpnnlofnnghnmfegnfnflicjjgj?hl=en 

https://github.com/kzahel/photobucket-embed-fix

 

 

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