my engine blew up yeterday when i was sat about 80-85mph on the M6, ive spoken to API about a replacement etc, but my query is what turbo should i have on my car?
its a 93 WRX import, ive only owned it about 3 weeks and i have paperwork showing me a new tubby was fitted in october, the paperwork states it was a TDO4 however API say it should have a TD05 on and that will have a factor it the engine giving up the ghost.
before anyone asks, no its on standard boost and all that the car has on is a cat back s/s ekhaust, induction kit and dump valve
any help would be great as this is my first impreza and i dont know a great deal about them at the min
craig

 

If it's a saloon, it should have a TD05 - A wagon of that year has a TD04

 

Yup should have a TD05 my MY93 JDM does

 

Yep, looks like someone put a TD04 from a wagon onto your saloon then. Fitting a diff turbo onto a map not suited to it is asking for trouble... Feel sorry for you mate, you weren't to know.

You're in good hands with API.

Hope it gets sorted quickly.

Ns04

 

yep its a saloon

 

to be honest I dont think it would cause major problems, you just wouldnt get the maximum out of the car.
I have a my93 and it doesn't even have a td04 it has some small legacy unit on there, that someone along the lines has put on. I was running the standard ecu (U8) with a decat downpipe and induction kit and I never saw over the 2nd greenlight on the knocklink. That was with 97 ron fuel as well (not often I use optimax). It was only when I had a power fc fitted and mapped that we found out the turbo was a smaller unit as it wouldn't hold over 1.2bar of boost.
A tdo4 will easily deal with anything a stock ecu will throw at it, it just may be working harder than a tdo5 would

 

My thoughts below exactly a smaller turbo would only damage the turbo not engine it would need less from the engine not more ????


keep me posted .........

ps no one knows if the car was re mapped to run on this turbo any way, if it was i have been told it would be fine, in my exsperiance tubo problems normally cause bottom end failures and not top but thats just what ive experianced ....

 

Craig the car is not running standard boost mate been re mapped it was well quicker than 270 bhp ...

ps.. cant find no more receipts than i alrdy gave you but will keep looking and see if i can track the last owner ok mate

 

yeah i know you said it was remapped but the boost controller was disconnected, on plumbing in a boost gauge to test it out it was still standard boost with the boost controller disconnected.
i had it on standard when the engine went as my new gauge only arrived yesterday and i never had a chance to fit it!

 

Wonf, come and drive mine mate and make a comparision. We are off at the same time

 

The boost maps between a TD04 and a TD05 are completely different. It WILL cause major problems if not corrected or adjusted within the map.

If it has a 'one size fits all' Scoobyecu fitted it'll be way off and will quite easily wreck the engine.

It should have a TD05 snorkel type. Begs the question has it even got an Impreza engine in or is it a Legacy??

David APi Impreza / APi Engines
www.apiengines.com

 

the boost maps are totally different I agree with that, but it is the turbo that would suffer damage/failure as it will be working harder trying to give the same boost levels as the bigger turbo, the poster says the car was running standard boost. I use my own car as an example before I had the power fc fitted and mapped. I agree a smaller turbo on a standard map would not be ideal but it will work, without putting extra stress on the engine.

 

If the car had been remapped to cater for the TD04 then no probs, but if the boost had been cranked up on a map based on a TD05 then damage may have occoured, the smaller turbo will be out of its efficiency zone and pumping hotter air than the ECU thinks, so there would be more chance of det if over worked.

 

How are you sure it's running standard boost?

G.

 

That'd be my guess!

Ns04

 

The poster says he has removed the boost controller and it was running standard boost which he montiored on a plumbed in boost gauge

 

when i brought the car i noticed it had a metal box in the engine bay by the induction kit around 6"x3" with electrical wires coming out of it and a boost hose, i checked it and it had power going to it but the boost hose was disconnected. there is also switch on the dash which can be turned up and down.
i hard wired a spare boost gauge my mate had through the window and t'd off a boost hose into the 'controller' and tested it. turning the switch up and down, with it down it was running standard boost but turning it up was then running 1 bar of boost. so i have a primative boost controller already connected to the car.
however i turned it down and disconnected while i waited for a new boost gauge to arrive, so when the engine blew it was running standard as my new gauge has only just arrived.
im guessing who ever use to own it probably had the boost controller connected and turned up but couldnt monitor it as the car hasnt got a boost gauge
and in relation to the turbo i spoke to forreters garage who supplied the turbo,the reciept dosnt say which type of turbo just how much it cost and when. they beleive they supplied a td05 but cannot comfirm as they only supplied it and not fitted it, but they did say it wasnt brand new but used. as they had a batch of td05's from legacys that they sold
craig