Caldina Factory Boost

[darkwolf]

A friend of mine has a 1999 Caldina GT-T. He has been experiencing detonation. Even running 98.

He asked Toyota about it and they told him that it isn't running factory boost. They said he should be running 8 PSI, but he is running 13. No modifications except boost gauge just to see what it was running.

Can anyone please confirm their factory boost settings? If they were running 13 or 8 or anything else for that matter.

Thanks in advance,

[bbq1988]

dont they run 12-13 factory? my one runs just under 1bar (exhaust mod) with no problems

[fivebob]

He asked Toyota about it and they told him that it isn't running factory boost. They said he should be running 8 PSI

Complete and utter bullshit. I suggest you ask for a mechanic that actually knows something about the 3S-GTE, not one who thinks they know about it

Stock boost should be 0.95kg/cm3(13.5psi). 8PSI is the wastegate actuation pressure, you only get that if the ECU detects that the engine is cold or there is some other condition requiring low boost. At all other times pressure is bleed off the wastegate so that it doesn't see actuation pressure until manifold pressure is approx 0.95kg/cm3.

Stock boost on the Gen III is the same 0.95kg/cm, and they make 245PS according to Toyota's figures, so how on earth could the Caldina engine make 15PS more with 5.5psi less.

[AJz]

yea bout 13 - 14psi on mine

[darkwolf]

So does anyone have any suggestions as to what is causing the detonation?

Is it just a standard issue with the GT-T coupled with an interwarmer?

I've suggested a colder spark plug...

[fivebob]

There seems to be an issuse with some GT-T's that appears to be timing related. i.e. the ECU is giving too much ignition advance for the load on the engine. So far no one has figured out if the cause is a sensor or ECU fault. The best advice I can give is to try swapping ECUs if you can find another one.

Is it Manual or Automatic?

[strx7]

if its auto, i have an ecu you can borrow if its the right numbers

[darkwolf]

It's a manual...

My friend is gonna be really happy when I tell him it's an ECU issue