DARKSSLASH

Hi people a little help needed please. was looking to see what ecu my 93 wrx has and saw it was the standared U8, Then thought id just look inside to see if the mount for a chip was there and lone behold it was already chipped?????

The sticker on the top says

PV504B
WRC
V4


Any one have an idea who made it and what it dose????

nickthehead

I have a prova chip in mine which has an aggresive map, advance on ignition timing and high boost. Mine has WRX PV20-2. Dont know exactly what it means but have another look on the chip to see if anything is written on the extra board. One of the resistors would have been cut so that the ECU reads from the chip and not the main board.

DARKSSLASH

My chip dosent have a board like yours? it is just one of those chips soldered in to the spare port on the bottom right of the board, and the j1 resister has been taken out so it is running on the chip. any one got any ideas???

Scott.T

iTrader: (2)

The code sounds like a Prova chip. Probably running about 16psi and quite advanced timing.
Prova are one of the better Jap suppliers. Their map has certainly had more effort put into it. However, it's still a little livley for UK fuel IMHO.

DARKSSLASH

intresting, as i didnt think the car was all that much quicker than the rest?? As i dont have a boost guage i carnt tell the psi?? would a trip to the rolling road be in order to see what the crack is???? The car was fitted with a tdo4 turbo when i bought it and with it being a saloon iv just put a td05 on as im under the impression thats the right turbo for the car. could this mess the map up??

eddysti

were is the j1 resister located and what does it look like as i dont know what im looking for.

cheers eddy.

Delboy2

Is in the area indicated below (looks like a resistor but is infact a zero ohm link)



If the additional board with the Eproms has a map for the TD04 - the addition of the TD05 will cause boost issues with the std boost control as the duty cycle map etc will be set for the TD04

Cheers