Skyline Detonating On Dyno

[The Dan]

L O L I liked the part about "Honestly you should be happy that they actually have the correct equipment and actually heard the detonation."

and "especially when you have allocated 5 hours for a tune..... and not 2 days"

Who could possibly take 2 days to tune a car? Imagine the bill, hi yes that will be 1600$ please oh and great news it made 6kw more!

Not sure if you're serious or taking the piss but you'd be extremely surprised how many tuners DO NOT use knock detection on their dyno. I know of at least 4 in the greater Brisbane area and not only don't use it, but when challenged about it, simply state how good they are they are able to detect knock without the need for a knock detection device.

I can tell you I was very surprised when I also thought I had a good ear for that sort of thing then someone put a headset on me and proceeded to pull 8 degrees of timing out before I could stop hearing it knock. The car made 10rwkw less after that. The customer didn't blow it up.

[51NNA]

I always use knock detectors, even if the ecu has it, its hard to hear knock on certain cars over the engine noise and ecu's arnt always accurate, especially vipecs would read huge knock when there was none and read low knock when I could hear it quite clearly. I know a lot don't use them because half the time there to lazy to clip it on the block or there works to cheap to buy one, also yes a lot of cars can take time on the dyno to sort out bugs, but not something as simple as det.

[51NNA]

But in saying that I also never used to use them until I started tuning petrol cars.

[Rolls]

I also know of a big name workshop here in Adelaide that doesn't use knock detection, I won't ever be getting my car tuned there again as when I hooked up some knock ears and reved out 3rd on a warm day it was detonating like crazy.

Really really slack, PM if you want to know who.

[GotsWapan]

UPDATE:

Picking car up tommorow afternoon, if I have time I will post a dyno sheet.

But because I was only sent an 8psi actuator it didnt make a whole lot of power. I'm just glad they fixed the detonation and got it running correctly.

Needs a new rear muffler though, its partially collapsed.

[DVS JEZ]

I also know of a big name workshop here in Adelaide that doesn't use knock detection, I won't ever be getting my car tuned there again as when I hooked up some knock ears and reved out 3rd on a warm day it was detonating like crazy.

Really really slack, PM if you want to know who.

I dunno how these things handle det like that. I freak with the slightest little bit of det and dont push through it.

[Rolls]

I dunno how these things handle det like that. I freak with the slightest little bit of det and dont push through it.

Yeah as soon as we heard it stopped immediately and pulled 2-3 degrees out of that area of the map

[AngryRB]

how accurate is a pwr fc at detecting real knock? or are all computers about the same

Edited May 24, 2012 by SliverS2

[DVS JEZ]

how accurate is a pwr fc at detecting real knock? or are all computers about the same

I have found they are all different. Some actaully ping at around 35. And some ping after 60.

So without listening and knowing, be carefull

[Mitcho_7]

Jez , your knock detection setup is pretty cool and seems to work quite well, not to mention it was probably cheap as. But ill admit at first I had no idea what the hell it was ...

Edited May 25, 2012 by Mitcho_7

[DVS JEZ]

Jez , your knock detection setup is pretty cool and seems to work quite well, not to mention it was probably cheap as. But ill admit at first I had no idea what the hell it was ...

Haha cheers man,iproblem is i spent $900 on the kmon kit and i prefer my new setup as i can hear alot more

[GotsWapan]

Excuse the tuner from running out of ink. 190kw at 8.7psi

[GotsWapan]

Inside of rear muffler

[HYPED6]

That's pretty good power from 9 psi.

[51NNA]

Good power but f**k its lean, 12.5:1 =/ no wonder it was pinging lol

Edited May 26, 2012 by 51NNA

[STATUS]

Good power but f**k its lean, 12.5:1 =/ no wonder it was pinging lol

I run my own cars at 12.5:1.. never had an issue..... especially as the boost is so low... could go easy 13 depending on engine

[Rolls]

I run my own cars at 12.5:1.. never had an issue..... especially as the boost is so low... could go easy 13 depending on engine

I had mine at 12.5:1 pm 19psi dropping to 16 psi making 260kw on a highflowed rb20 turbo on a neo, it also didn't ping which is suprising considering how small the rear housing is.

we detuned to 11.5-12 for safety but you can get away with it if timing is conservative.

Haha cheers man,iproblem is i spent $900 on the kmon kit and i prefer my new setup as i can hear alot more

What is your new setup?

[DVS JEZ]

I had mine at 12.5:1 pm 19psi dropping to 16 psi making 260kw on a highflowed rb20 turbo on a neo, it also didn't ping which is suprising considering how small the rear housing is.

we detuned to 11.5-12 for safety but you can get away with it if timing is conservative.

What is your new setup?

Its top secret

Maybe i should start tuning lean... Seems no body has been melting motors

[Rolls]

Its top secret

Maybe i should start tuning lean... Seems no body has been melting motors

It is a street car, I would be nervous running it above 11.5:1 on the track, though I would be dropping the boost level for safety as well.

What are your thoughts on lean + less timing vs rich + more timing? I've heard the japs don't even use AFR they just use exhaust temp and go rich as hell and smash the timing into the motors.

Is your secret method a garden hose? Ear muffs with a microphone wrapped in a rag? cmon spill.

[51NNA]

I run my own cars at 12.5:1.. never had an issue..... especially as the boost is so low... could go easy 13 depending on engine

Wow, ile show you a pic of my SR20's piston when I tuned it to 12.5:1, half the side of the piston melted lol was at 18pound though. I'd never tune above 12:1 now.

Edited May 26, 2012 by 51NNA