dj219957

if your car IS STANDARD BUT is running 18 psi then dont expect the engine to last long! lol. tick, tick, tick, tick........BANG! .....1 x new short block please!


As per scotts post. STANDARD boost should be much lower.

Scott.T

iTrader: (2)

The standard Map sensor won't even read 18psi, as it max's out at approx 17.5psi. And you need at least 1 - 1.5psi of headroom to ensure that the safety fuel cut still trggers.

rossyboy

iTrader: (8)

I'm amazed that there are newbies who have been here less than a month that are arguing with people who have been here for 5 years +

Scott probably knows more about early Impreza ECUs and boost targets/fuel cuts than 99% of people on here.

jockc79

well not in this case it seems

jockc79

so scott what must my car have done to it to ne getting 18 to 20 psi it is a zero sports wrx import

willfal

it cant be standard then if it's "zero sports" maybe you have one of their ecu's and a combination of other mods to give you that 18-20psi.

Check ur ecu cover, it could have a zero sports sticker on it to indicate they have been playing with it - or open the thing up and see if the spare chip socket has been used.

Will

Marky-San

I had a 1994 V1 STI and it was RR'd at 276 with a different rear box only. The power figures are no use tbh.

The interior is fine, the car ran very well indeed - bar the fuelling. I modded the car air, exhaust, ECU etc and it was the worst thing to do - OK, the car was a blinder to drive but

If I could do it again, I would get a UK turbo - its the safer cheaper and admittedly a slightly slower option, but considering I had the hassle of 2 engine rebuilds to contend with - you'll understand why.

Get a good sound UK turbo and get some sensible mods. More importantly, learn to drive it and it wont matter how much bhp its putting out

rossyboy

iTrader: (8)

Scott has already given you the answer to this in his earlier reply:

There is an easy remedy for this. Take Zero sports ECU and throw in bin. Buy correct ECU for your car (a Z4 would be ideal) and put in place. Sorted

rexabusa

think we ave been here before , go back to 12psi. ok who wants to buy a impreza cause they are well overated?.
feel that turbo kick in? NO!

rossyboy

iTrader: (8)

If you want to increase the boost safely, get a chip from Scott. This will map to 97 RON fuel and increase boost to 16 psi. A standard import ECU is bad enough on uk fuel without adding dodgy Japanese chips to the problem.

rexabusa

[quote=rossyboy]I'm amazed that there are newbies who have been here less than a month that are arguing with people who have been here for 5 years +

Scott probably knows more about early Impreza ECUs and boost targets/fuel cuts than 99% of people on here.[/quote

dont think i will believe anyone on here any more

Scott.T

iTrader: (2)

Your gauge may be reading 18psi but I expect it's maxing out at the map sensor limit, which is about 17.5psi.

If it's a Zerosports Impreza, then judging by the boost levels it must have a Zero Sports ECU. It could even have a 3 bar map sensor, but I doubt it.

I havn't actaully got a Zerosports map here as never got round to dumping a ZeroSports ECU image while I had the My94 'project' car. But if it's anything like the Mines, Jun, Prova or any other un-branded Jap maps, then it will defo have a high target boost map, no fuel cut, no speed limiter and IMHO far to much ignition advance for UK fuel.

There are a few on here that had Mines ECU's and have ended up blowing em'.

Of all the Jap maps the Prova is probably the safest, but still too advanced unless you use a splash of booster.

If you want to really know what the Zerosports chip is doing, pull it out 'if it is socketed' and rejoin the J1 link. Then send the chip to me and I'll read it/decode it and tell you what the target setting and ignition/fuelling are like.

jockc79

it has got zerosports ecu but the guy that had it before me had something in it changed to sort out the boos. i had it in the subaru dealers they said it is set to run 15psi but it is reaach 18 somtimes 20 psi why is it doing this what could cause it to overboost

GC8

Theres a lot of nonsense offered as good advice Im afraid.


Simon

Scott.T

iTrader: (2)

Brass restrictor removed from the Boost Control solenoid return pipe. Quite normal for this to go missing .

Check the small hose from the very bottom of the boost control solenoid, that connects to the left hand side of the air intake resonator/expansion box.
there should be a brass restrictor in the hose, just past the 90 degree bend.

jockc79

garage cleaned the solenoid they have probably lost it thanks will check that out the high boost was making my concerned for the engine

jockc79

if it is missing how easy is it to get another one

Mick

iTrader: (1)

lots of info & stats on imprezas at http://www.iwoc.co.uk/contents.html

For example:

Several magazines have tested the 1997 model and here are a few figures....
Performance Car magazine tested a select choice of vehicles over the 1/4 mile drag strip at Santa Pod Raceway in the November 1997 issue (subscriptions 01858 435337). The Subaru Impreza was included....note these are one way times only down a grippy drag strip and with only driver and minimal fuel. 0-60mph : 5.03sec
0-100mph : 13.56mph
Standing 1/4 mile : 13.72sec @ 100.6mph
Max g : 1.09
You can get 97MY cars in your budget now... Read up on them - the pick of the bunch - yes how did you guess I do have one (6 1/2 years now) and I do like the 'performance car' 0-60 time

All the best with whatever you choose

Mick

scoobycat

scott sorry to post on this thread but was looking to get mine re mapped soon for a bit xtra but have no idea were to take it or how much its gonna cost im in surrey so not that far from you any help would be much appreciated its a my97 uk thanks

Scott.T

iTrader: (2)

No can do an MY97, due to a different ECU being used. The 97/98 ECU is a bit of a blackhole when it comes to mapping.

An Apexi PowerFC is a good option for you (will be fitting one to my MY00 in a couple of weeks, as fed up with being locked into the ECUTEK S/W remap costs).

However, I do know a local man who can.....have a word with Jolly Green Monster. He can supply and map you an apexi power FC.

scoobycat

anything you can find out would be a great help i was told something like that about the ecu about a year ago but he just baffled me(not hard)but didnt get rough prices hoping to get done by next month if can afford but would like a bit more out of it already had full de cat if that helps, thanks for ya help mate.

scoobycat

forgot to ask where abouts is he based? contact no?cheers

Drift SX

Scott, I have a STI Version 2 its got HKS Hiper exhaust system, HKS induction kit, de-cat down pipe. running standard ECU 0.9 bar, always use optimax, is it necessary to get a re-map chip for UK fuel?

thanks for the advice.

Scott.T

iTrader: (2)

The STi 2 map (6K ECU) runs a little more advance and a little leaner the the WRX Z4 map (which I consider safe for UK 97 RON Fuel). But it's using the same principles as the Z4 unlike the STi 1 and early WRX.

I would say that it is probably OK in it's current state of tune as long as everything is running as it should. Although I would 'Bin' the HKS Induction Kit as these can confuse the ECU load calculation which ends up running it too lean with too much advance.
They also have quite bad filtration and don't really give any performance gain over a Green Panel Filter or JDM Spec STi Panel etc..etc..