DE cat

[lowtidecopey]

if you de cat a classic impreza (cat on back of turbo on down pipe) will you over boost?

[Olly P]

Yes.

[Broxi]

it will overboost, however their are ways to prevent the overboost.

You can fit either a Manual boost controller (MBC ~ Dawes Device)
or a similar electronic boost controller.

[lowtidecopey]

how much psi will it over boost by iv got an electronic boost controller nt connected i took it off but its easy to put back on i dnt no the make of it tho so i avnt gt instructions for it

[Broxi]

it is difficult to calculate the amount of overboost as their are varying factors, like ACT (Air Charge Temperatures) the colder it is outside the better the car goes and the more likly it is to overboost.

i have also found different exhausts cause different amounts of overboost, also the turbo you are running can account for some of the overboost also.

I would try and fit the electronic controller back up.

[lowtidecopey]

oh rite but me adjusting the boos my an electronis boost controller al i could do is reduce the boost can i do that with an electronic boost controller also how can i get hold of instructions for mine im not sure what make it is or anything it has no name printed on it?also about ACT's i want to get a gauge and sensor for my car where can i get one from that will suit my classic impreza

[Broxi]

have you looked on the back of it for a name? maybe put up a pic and someone may recognise it.

are you using a FMIC or a TMIC?

fitting an ACT gauge would mean drilling and tapping a thread into a TMIC, or if using a FMIC, a hole could be drilled in one of the intercooler pipes and a thread welded in place to screw the sensor in.

I am sure most Gauge shops will sell these. or maybe get them on eBay.

I hope to start selling Gauges etc soon.

[lowtidecopey]

What is an FMIC and aTMIC i just would like to fit a temp gauge in to a hose before the throttle body and afte da intercooler maybe even in to the intercooler what are these called i do need one for my car

[Broxi]

FMIC = Front Mount Intercooler
TMIC + Top mount Intercooler

as i said, TMIC i would drill and tap a thread into the intercooler, i suppose you could also do this with a FMIC, just need longer wiring.

i done a search for ACT Gauges, and found Blitz do a Temp Gauge that does any temp, so it looks like they are all the same, Just some have water or oil temp writen on them.

[bob]

FMIC=front mount intercooler
TMIC= Yes you guessed it, Top mount intercooler...:wink:

Did you look at the link I put up about temp gauges and probes?

[bob]

Cheap Gauges...
http://cgi.ebay.co.uk/Air-charge-temp-gauge-inlet-temp-sensor_W0QQitemZ200023068218QQihZ010QQcategoryZ722 15QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[Broxi]

that looks like a vauxhall interior to me.

nice looking ACT's too.

[bob]

I see Harvey bought the last one...If he bought it, it must be good...:wink:

[lowtidecopey]

yeah i looked at the link but couldnt find a good site to buy one from i have a top mount intercooler how much brake is that good for and about this blitz temp gauge where can i get one from?also exhaust temp sensor if i get a decat they dont have a hole for one i heard some people leave them off????

[Broxi]

http://www.whifbitz.co.uk/gauges.html

the Blitz mirror drive ones are awesome, but they do not come cheap. just under £200

the EGT is not required, and can be removed without any ill effect.

I bought a XS power Turbo up pipe, this had the fitting for two lamba sensors and an EGT sensor.

[bob]

Pre96 (I think) has the O2 sensor in the exhaust headers. It moved to the downpipe for MY96.
If you have a MY96 you should find a LAMBDA sensor at the top of downpipe you can see this from under the bonnet. This must be replaced most downpipes have a stabbing for this.
Pre 96 had the Lambda in exhaust headers and a cat on fire sensor 18" down on the downpipe. This one can be removed and forgot about...

[lowtidecopey]

i have the lambda sensor in the headers on mine so about the exhaust temp sensor is this vital cause someone said that they dont have to be fitted. And do you no of any cheaper air temp sensor and gauge?

[Broxi]

The EGT is 100% removable. just bin it lol

I do not know of any cheaper ones, but if you check i think you will find they are the same as the water ones. (Not 100%) but if you do some research, call a few gauge shops i am sure they can advise.