[2JZ Piston Pitting Or (Knocked Issue)]

Hello everyone,

Below are the specs of the engine

2JZ GTE VVTI Stock Long block with some upgrades

CAMS : 264

Turbo: AR70 Journal bearing

Boost Pressure: 1.5 Bar

Spark Plugs : NGK BKR7E

Fuel : RON 97

Piston: Thailand Made Stock 2JZ Pistons

ECU : LINK Storm G4+

RPM Limit to : 7.5K RPM

Timing Table :

2500                                                                                           8000

28    28    28    28    28       28       28       28       28        26      30
26    25    25    25    25       25        25      25       25        25      25
25    19    14    14    14      14        14       14       14       14       14
24    18    15    13    13    12.5    12.5    12.5    12.5    12.5    12.5
22    14    13    12    12    12.5    12.5    12.5    12.5    12.5    12.5
20    12    12    12    12       11      11        11        11       11       11

TPS Vs RPM

After A little three months of engine running

We open engine a apart for some upgrades we notice that there is pitting on the pistons on the exhaust side.

Wondering is it piston is not genuine or there is a problem with my timing table, do think that the numbers in the table are very very minimum?

Did check for Knocked with Links knock equipment, no sign's of knock.

Wondering which part went wrong that cause the issue.

For fueling AFR is around 10.5 at WOT, engine make 354 WHP

Already did check for timing drift there are no signs of it drift from 1.5K RPM to 4K.

This have been hunting me for the past week, hope that you guys can shine a light on me.

[Z20let timing drift]

Hi Adamw,

Thanks for your reply and help will try on it

[Z20let timing drift]

Hi Angel Powy,

Do you mind sharing what trigger pattern do you use for your Z20LET engine.

I have search around the web I does not get much info on the engine.

Going to wire up the Link G4+ Storm in to run the engine