JohnRoly

Hello all,

Am having a TD05 (from a v3 sti) fitted next weekend into my 1995 WRX wagon. Will it run OK with the current ECU, or will I need to replace it immediately?? If I replace, what with?? (SccobyECU would be the logical choice, but poo and rocking horses spring to mind!!)

Any idea where I may be able to get a suitable ECU??

Many thanks

Roly

tweenierob

Roly,

First off the turbo will not fit your car if it is from a V3 Sti, i suspect that maybe it is not from a V3 Sti as they were fitted with IHI VF23's as std, rather than TD05's
If this is the case and whatever turbo it may be is deffo from a V3 then it will not be a straight fit, however.. if it is a 90degree TD05 (from a 95WRX for example) it will be a straight swap.

Something to think about rather than getting stuck...

As far as ECU's go, if you are on a budget then Scoobyecu is the way to go, i am sure one of the guys has a TD05 wagon map to program for ya... Having them in stock is another matter

Rob

JohnRoly

Cheers tweenierob

OK, the turbo is definately a TD05, and i know that it came from a 1996 STi (as he replaced the entire engine last week - hence why he has a TD05 kicking around). The guy I bought it from (and is fitting it) works at a place called Parkstones (subaru dealer) so i am assuming he knows what he is talking about!!. He said it would be a straight swap (if not then he is wasting his time not mine!!). Assuming that it is a straight swap, will my ECU enable the car to run OK before I get my hands on a scoobyecu (chance would be a fine thing!!). Are there any standard ECU's that would work with thiis set up (eg Z80)??

If not I may have to get onto the Gizzmo guys in NZ!!

Thanks

Turbo_Steve

Standard ECU will let the car run, but I would NOT risk using any boost, as the TD05 is going to be flowing a lot more when it gets on song.

You either need to go straight in for a remap (which will sort your boost control, fuelling & timing).

Assuming you can't get a remap straight away, you'd be looking at the following:

* A dawes device (or other boost control) as in my experience the factory boost control will surge all the way up to fuel cut with a bigger turbo fitted. Changing the restrictor MAY fix this, but it would need some experimentation wwith varying sizes.

* Knocklink (and maybe AFR) as you're already running a Jap Map, which is not over-rich to start with. The TD05 could be flowing significantly more lower down in the rev range, which means a leaner mixture, which means you could be 'knocking' on the door of det. It may be rich enough. Or you may get det and blow your engine. Best to get a knocklink.

* Fuelling. If you're getting minimal detonation, you could increase the fuel pressure (adjustable reg, maybe pump)

*Piggyback. Depending on what you can get your hands on, toys such as an AFC-R or even a UniChip (shshs...I never said that) if setup properly will suffice in place of a remap....though in my opinion you can't beat the real thing.

Roojai

You could just get a Z4 ECU like me when I put my TD05 in my wagon. Works a treat giving me about 13-14 psi. 200 quid from API.

Turbo_Steve

I assume you've had it checked for detonation etc on Z4?

Delboy2

You could retain the standard ECU and fit a Scoobyecu with TD05 map which will have optimised maps for UK 98Ron fuel with the added bonus of a higher boost target

Cheers

Roojai

Yes I have a knocklink on my car and the engine is running very quietly on the Z4 ECU at all RPM levels and in all gears. I can get an orange LED to light towards the top of the RPM range in fourth gear on the most sensitive setting but this is just engine noise. Normally, just one green from 6000 to 7000 rpm.
Very happy with it.
Loads quicker with the TD05 and the Z4 than before.

The scoobyECU would be good if you could get one, but I am finding the power on the Z4 is enough, and I have more peace of mind because I am at lower boost figures.

Roojai

The combination of Z4 ECU and TD05 is just the standard 95/96 WRX saloon set-up, so no probs.

PS: I am running with a full decat as well, so probably got 270ish BHP and quick spool up

JohnRoly

Cheers Roojai,

Saw you had a VOS chip for sale, was thinking of going down the Gizzmo route myself, but would prefer a standard ECU (do not really trust some of these "custom" chips!!). I take it the Z4 is just a replacement chip rather than the full ECU unit??

Cheers again

Roojai

Z4 is whole ECU straight out of a 95/96 saloon (260ps standard). Just unplug the old one and plug in the new one. 15 minutes!

JohnRoly

Cheers Roojai,

Will give API a call tomorrow!

Forgot to ask, is the Z4 Ok with UK fuel??

Roojai

It's a jap ECU so needs Optimax at least.

Turbo_Steve

Z4 Ecu sounds good

But as Roojai says, sticking a ScoobyECU or Gizmo chip in the box is going to realise significantly more power, in the case of ScoobyECU is going to be reliable (VOS chip is really designed for legacy on a VF12, Gizmo raises rev limiter to 8000rpms, which strikes me as very dodgy on a standard engine at higher power outputs) and will probably be a lot more driveable (jap ecus tend to be a bit "peaky").

A remap of any kind (inc ScoobyECU) will allow you to run specific type of fuel (e.g. 97Ron) safely as well.
A true remap specifically for your car will see the best return, but obviously is expensive

jonny gav

iTrader: (1)

if you can't get hold of a Z4 then a U8 or W6 will also do the trick.

thet are alot cheaper too but are only rated at 240ps.(from 93-94 WRX saloon)

JohnRoly

Starting to get a bit worried!!
When the TD05 is fitted will I need a Z4 (or equivalent) along with a Gizzmo or scoobyecu, or can I just put one of these in my current ECU to run correctly with the TD05 and UK fuel??

Thanks

Roojai

I believe scoobyecu, vos chip etc will run same map on any 16-bit ecu, so you could just use your standard one if you have one of these types of chips. Better to have the right ECU though incase you want to run without the chip (if you are having problems for example)

Turbo_Steve

Fitting a chip to your existing ECU is less likely to give you problems than swapping ECUS IMO, but it's really 6 of one and half-a-dozen of the other. As Roojai says, if you wanted to remove the chip (though I can't think of a good reason for doing this, as they either work or they don't) then you can revert to the Z4s factory maps (Optimax strongly reccomended). Alternatively, you can stick with your standard ECU (which you know works perfectly with your current engine, aircon and other accessories) and remap that, but then you have to leave the chip in most of the time.
To be honest, getting a chip is going to see a significant improvement in driveability / power output over just putting a Z4 ECU in. However, the waiting list is (apparently) rather long, so putting in a Z4 and then remapping it later would seem a good course of action.

Roojai

"so putting in a Z4 and then remapping it later would seem a good course of action"

That's was my plan. I have decided to go for a proper map on a RR instead of one of these chips that I just don't trust.

jonny gav

iTrader: (1)

Roojai- why would you want it done on a RR instead of on the road?

john- your best bet is to get a Z4(260PS),7K(275PS),U8(240PS),W6(240PS).

the only aftermarket chip i would use is the scoobyecu if i was staying with the jecs system.
the reason for this is the guys that designed did so for uk fuel

most of the other aftermarket chips i have seen run far too much ignition advance for the boost on our fuel.

to me its not worth putting in a £200 chip and causing £1500 damage.

in my opinion you are better off putting a TD05 ecu in it for now and saving your cash and buying an aftermarket ecu like the apexi power fc.

that will cost you around £600 including a map that is costom to your car for the fuel that you want to run.

the cheap way isn't always the cheapest in the long run!

hope this helps you make up your mind

Delboy2

Wise words M8 Deffo agree with that

Cheers

Scott.T

iTrader: (2)

Z4 is fine on UK fuel as long as you use 97/98RON and the boost is left standard.

The Z4 fuel/ignition map was used in the Prodrive map supplied to Pre96 cars with PPP. The PPP also ran 0.7psi more then the Z4 and Prodrive recommended the use of 97RON.

JohnRoly

Thank you everybody for your advice, might be tempted to go down the Z4 route for the time being, especially as it seems to be OK if run with just plain Optimax. Is the 7K also Ok for UK fuel or would it require Millers OB until I get a re-map/scoobyecu??

Roojai

johnny gav:
I would get my car mapped on a RR as they can put DET cans on and map for my specific requirements and my specific modifications. I would probably get an uprated fuel pump at the same time.

Scott T: any more info about the use of the Z4 map on UK cars?

jonny gav

iTrader: (1)

why can't they do that on the road???

thats where you do you driving so a map done on the road will be more real world than a RR one.

Scott.T

iTrader: (2)

Not really, just whats been stated above.
The UK PPP used the WRX 95 Z4 base map and just adjusted the boost control, boost target and Speed limiter maps.

Boost was increased from 12.7psi (Z4) to 13.64psi (PPP)
Speed limiter was increased from 112mph (Z4) to 175mph (PPP).

All Pre97 UK cars with PPP should be run on 97RON (As quoted by Prodrive)

A Z4 should also work in a UK car giving slightly more boost (standard UK is 11.5psi) and smoother off-boost running. But in a UK it will limit to 112mph due to the Jap speed limiter.

Roojai

OK, I would do it on the road then. I just meant that I would have professionals do it with computers etc.

Roojai

cheers scott

jonny gav

iTrader: (1)

ahhhh i see, just wondered why the people you were using used a RR.

Chewy555

Hey guys,

Just wondering when you upgrade the ecu and turbo, what injectors & fuel pump do you guys use?