Pinging

[drifto]

Does anyone know what a safe psi level should be for an RB20DET before it has pinging probs.

Internally stock but has HKS T3G and a HKS fin & tube cooler from a FJ20 that's not real big. Air temp at the butterfly when cruising will stay aroung ambient temp but start boosting and it can rise to 60 degrees with ambient being 25-30 degrees.

It pings when boost is at an indicated 17-18psi if it starts getting hot.

Other mods include APEXI a/f and i/t piggy backing a standard ECU however this engine doesn't seem to have a rev limit? 9000rpm still no cut???

Has Blitz dual stage boost control, Blitz BOV, R33 GTR fuel pump, HKS pod filter and 3 inch from turbo back with N1 muffler.

I always run Optimax and used a Octane booster aswell once, but still pinging when close to 20psi. Any knowledge on this problem would be greatly appreciated.

[Steve]

Pinging sux. Personally I would be getting the car on a dyno so they can sus it out. Pinging is caused by too much heat in the combustion chamber, which is increased by many things, compression, boost, air temp, fuel octane rating (octane rating refers to the resistance to detonation), A/F ratios, ign timing, etc.

The safest thing to do would be to turn the boost down until you can get it on a dyno. The other thing to do would be to not go putting your foot down if you have been stuck in heavy traffic, as your coola gets saturated with heat and will not cool efficiently until you get moving again - so if you have to put your foot down wait until the intake temp comes down a bit first.

Finally it is possible you may not be able to run that sort of boost with your current set up, ie insufficient intercooling, too high a compression ratio or ambient temp just too high.

If you find yourself a decent tuner, alot of your questions may be answered, until then without knowing your exact setup, it is a bit of guesswork.

Steve

[fatz]

its summer and you runnig 18-20 psi with a shit intercoler

lol

you should be able to hear the thing ratteling its arse of

lol

[meggala]

you could be running out of fuel at that boost level put it on a dyno and you will see by checking a/f ratios. till then keep boost to 14 psi

Pinging is not some thing to be taken lightly.

all pinging causes some engine damage I found out the hard way.

meggala

[drifto]

Thanks for your advise, I'm happy to know it's not some other weid prob and will defiinately keep below 14psi until I fit beter cooler and maybe fuel reg and injectors then onto dyno for tuning.

Looking forward to getting this thing out on the track soon and meeting some like minding people.

Cheers!