Pinging,knocking,detenation

[shockwavexr6t]

Hope some of the exprienced people have some thoughs on this topic cause I'm sure I will help others when it comes to getting the most for the cars.

Is pinging,knocking,detenation caused by the following?

Air density

Fuel supply

quality of fuel

timing

the reason I ask my car was pinging at 305rwkws and was backed of to 295rwkws

is this due to lack of fuel or air flow or heat of the day begin over 32c. What baffles me is the next mod will be custom plenum,ic and different setup for cold air intake and no upgraded fuel pump required for setup as advised by tuner and will support 330 - 340rwkws

So does this mean that standard ic plumbing, plenum and current cold air box stop tuners getting any more out of the current setup but with further mods pinging stops and more power is agained.

That makes me think that changing the above will assist in air flow and less presure drop which stops pinging right. So fuel supply isn't the issue right!

any feed back is welcomed

hopefully this may shed some light to others and myself.

shockwavexr6t

[BALLBREAKER]

  shockwavexr6t said:

Hope some of the exprienced people have some thoughs on this topic cause I'm sure I will help others when it comes to getting the most for the cars.

Is pinging,knocking,detenation caused by the following?

Air density

Fuel supply

quality of fuel

timing

the reason I ask my car was pinging at 305rwkws and was backed of to 295rwkws

is this due to lack of fuel or air flow or heat of the day begin over 32c. What baffles me is the next mod will be custom plenum,ic and different setup for cold air intake and no upgraded fuel pump required  for setup as advised by tuner and will support 330 - 340rwkws

So does this mean that standard ic plumbing, plenum and current cold air box stop  tuners getting any more out of the current setup but with further mods pinging stops and more power is agained.

That makes me think that changing the above will assist in air flow and less presure drop which stops pinging right. So fuel supply isn't the issue right!

any feed back is welcomed

hopefully this may shed some light to others and myself.

shockwavexr6t

<{POST_SNAPBACK}>

Mate aint no tuner but I think you hit the nail on the head all 4 will result in pinging.By the way good power. With after market plumbing =20rwkw.How much boost & what type of cooler.BB

[gogo]

Pinging etc is essentially the result of sudden combustion of the air/fuel mix in the cylinder.

A 'normal' combustion event esentially involves the steady propogation of combustion through the cylinder (which whilst being very quick is progressive and not sudden) from the spark plug (in a standard 4 stroke petrol engine).

Engine temperture, air/fuel ratios, cylinder pressure and fuel quality will all impact on the likelihood of pinging occuring.

In simple terms, higher internal engine temps, leaner fuel mix, higher cylinder pressure, and poor (read lower octane) fuel will all increase the likelihood of pinging...

What is done external to the engine will not fundamentally change this.

Mods will allow other changes to occur such as maintaining correct air fuel mixtures, running more boost etc which allows the engine to produce more power.

The secondary impact of modifications which can assist net power delivery is the reduction in the pumping losses inherent within the combustion process in order to draw in the air and fuel and exhaust the spent combustion products.

Now to answer your queries...

is ping caused by...

all can contribute to pinging...

fuel is not likely to be the problem - COOL air flow and ability to provide high boost at high rpm is likely to be the current limitation.

Advancing the timing to try and acheive greater torque and power results in higher pressure of the yet uncombusted air fuel mix which can lead to detonation or pinging. I woulds expect that tuners would advance timing as much as possible without causing pinging then back off just a little to get max power with some safety marin...

Additional mods such as plenum and ic will improve the efficiency of the induction system reducing losses - particularly at high rpm (which is where peak power is produced), and will also allow more boost and cooler air = more dense = more fuel = more power without touching timing. So current restriction may not be fuel - but you are likely to require more fuel with further mods to support more power, although shear efficiency gains should give something at the same fuel consuption rate...

Hope this helps a little...

Cheers,

Ben.

[gogo]

my ability to spell astounds sometimes

[waxyjj]

Shockwavexr6t if you check out the Nizpro site Simon has a report on detonation [pinging]. It's in the Technical Discussion area good luck.

Joe

[DBOSS]

Pinging= Bad tuning

[F6 UTE]

  DBOSS said:

Pinging= Bad tuning

<{POST_SNAPBACK}>

Or bad fuel, or blocked Fuel filter, excessive heat..

[DBOSS]

  F6 UTE said:

  DBOSS said:

Pinging= Bad tuning

<{POST_SNAPBACK}>

Or bad fuel,

Sick of hearing this excuse from tuners what a joke

[F6 UTE]

  DBOSS said:

  F6 UTE said:

  DBOSS said:

Pinging= Bad tuning

<{POST_SNAPBACK}>

Or bad fuel,

Sick of hearing this excuse from tuners what a joke

<{POST_SNAPBACK}>

Why?

A fuel which has been sitting for a period of time will start to lose octane points, get moisture in it and be useless, or not 'optimum'

As everyone always says, go to a servo who turns over alot of fuel. Why say this if there is no merrit to it??

Then there are the dodgey blokes who 'water' there fuel down with crap.....

[Guest xrtwpn]

  F6 UTE said:

  DBOSS said:

  F6 UTE said:

  DBOSS said:

Pinging= Bad tuning

<{POST_SNAPBACK}>

Or bad fuel,

Sick of hearing this excuse from tuners what a joke

<{POST_SNAPBACK}>

Why?

A fuel which has been sitting for a period of time will start to lose octane points, get moisture in it and be useless, or not 'optimum'

As everyone always says, go to a servo who turns over alot of fuel. Why say this if there is no merrit to it??

Then there are the dodgey blokes who 'water' there fuel down with crap.....

<{POST_SNAPBACK}>

A car shouldnt be tuned to the point where if the fuel isnt 100% its going to ping its head off if a tuner cant tune a car without it pinging I suggest another tuner