A friend bought the basic stg 3 upgrade, -31, 3 bar, 803's air filter etc.

Car ran fine, 20psi, and performed ok, with the std turbo.

Car now has a T34, and RS500 intercooler fitted.

Now the place that supplied the chip, Woodford, claim that same chip is fine for a T34 + RS500 IC as well

IMO thats highly unlikely.

The chip has these numbers marked on it.

3BL8R25.803

Can anyone tell me what spec that is actually intended for ?

The LM-1 wideband I was using to test, is f**ked up, and locks out after it reads "too rich" when it comes on boost. Normal driving it works fine

That is possible, as at 20psi with new turbo and IC, the car is going pretty slow.
Although if the original chip was correct, I'd expect it to be lean now with the T34, although I dont trust the LM-1's readings.
Not prepared to abuse the car until I know for sure what the mixtures are, but at the minute, something is very wrong. It should not be this slow.