[Mk2] [Turbo] 1990 SPEC A TOM'S Tec ECU

[CardHore]

Hi guys,

Ive managed to locate a rare TOM'S Tec ECU. It was removed fron a 1990 Celica GT4 Spec A car. Its a mappable unit and uses generic software, has a map built in I thin k and allows the use of boost controllers etc. I was wondering if this would also suit the Rev2 engines as well as Rev1 MR2s or should this be striclty left for the Celica?

I may buy the item, keep hold of it or perhaps use it in the future. I love collecting TOM'S stuff so im hoping this could be of use. Anyone shed any light?

Cheers!!

[toxo]

The TOMs ECUs I've seen in the past are techtom ones which are are stock ECUs with a read only piggyback chip fixed inside them. The map in the piggyback chip is fixed to whatever modifications the car had that the ECU was installed on. You cannot alter the map and there is no easy way of finding out what modifications the ECU map was built for.

There are quite a few ECUs like this, Mines, Blitz, Sard, BEEE-R etc. See http://www.imoc.co.uk/forums/viewtopic.php?t=122753

Does it look like a stock ECU with a bigger cover fitted on the top? Or is it something a bit more special?

[CardHore]

Hi mate...

This guy said its like a double decker, so as you described it probably has a cover over it. Im awaiting pictures. Does sound interesting, ive read up that some can be mapped but I know how you mean. I had a Blitz ECU on my MR2 when I bought it a few years back. Came over from Japan like it and it ran like a dream. Kakimoto exhaust and HKS induction kit with the AVCR running 275bhp on the dyno that I read, it belonged to a previous owner here. The car has gone beyond standard now and is in project mode.

Once I get pics and if it looks quite spicey ill post them up. If its cheap enough ill have it and perhaps even sell it on or something, just to say I owned one lol

[jon]

The TOMs ECUs I've seen in the past are techtom ones which are are stock ECUs with a read only piggyback chip fixed inside them. The map in the piggyback chip is fixed to whatever modifications the car had that the ECU was installed on. You cannot alter the map and there is no easy way of finding out what modifications the ECU map was built for.

With a EPROM reader/programmer and the right S/W it's pretty straightforward to decrypt the EPROM in the TechTom piggyback boards and find out what modifications have been made. With a bit of patience it's even possible to remap the ECU.

I've looked at a couple of TechTom piggyback ECUs, one for a Rev 2 and one for a Rev 3. The Rev 2 ECU was a bit disappointing, just basic modifications to remove the speed limiter, bump up the rev limit and fuel cut. The Rev 3 ECU also had remapped fuel and ignition maps, which made it run extremely rich on a stock engine.

Cheers,
Jon

[Marf]

[JasonB]

Glad I've just seen this.
I came onto ask a question about the SARD and Blitz ecus on the bay at the mo.
General opinion seems to be to leave them alone then unless you can sort out the software!

I'm at the point where I need a mapable ecu for my rev.2
It's got a ct20b, forged pistons, steel gasket and a rev. 3 inlet cam running 16psi.
It goes pretty well but needs the map looking at for fuellng etc. My problem is that funds are not as free as I'd like them to be after building the engine and more than £1K for the ecu with map I could do without.
I'm not after launch control, anti lag and all the other bells and whistles, I just want it to go as nice as a mapped car would.
I even have a unichip that I bought and never fitted - but they don't seem to have a good name on here.
Power FC's for the rev 2 are ultra rare so what would anyone suggest as a next step. Are there any options for less than £400 (plus the required mapping) out there?

JB

[BigRich]

The pnp ecu debate is always interesting - the st205 GT4 chaps luv the Blitz Access and have seen some impressive results with the mods you have JasonB.
I'm going mappable though with a PFC and would say keep your eye on ebay - 2 Rev2 PFC's have sold in the last 4 weeks and for not alot tbh - the sellers could easily have got more if priced differently.
What sort of bhp are you after?

[JasonB]

I'm really not after a load of power. I was quite happy with things as they were before the stock turbo went and I found a brand new, steel shaft turbo tecnics ct20b on ebay.
Stripping the engine showed the oil & water pump were not great and a few marks on the bores --- then the spending started. Pistons, ARP bolts, lighten & balance, machined flywheel, RPM clutch and so on. I've got a ST205 C/C set up as mu current project.
With the current spec. I'd be happy with 300 at the flywheel but it's the evryday manners & driveablitiy I quite miss. Believe me, there are times when I wish I'd just left it alone!!
When building the motor I tried to futureproof as i was quite keen on a gt3071 turbo at some point.
If I could get an AP Power FC for cheap I'd be well happy.
I really think there is a lack of sub £600 mappable ecu's for people who don't want a million horsepower and all the other stuff.
If anyone hears of any rev. 2 Power FC's or a secondhand Link G3 then give me a shout!!
Also, if anyone has any suggestions then let me know.
JB.

[Andy F]

Why dont you get rev3 loom injectors and ecu??
Your set up is stock really..........

[JasonB]

I had thought about that as it would allow me to use a regular Power FC plus there are benefits with losing the AFM.
Now as far as nuts and bolts go I don't have any problems - I actually enjoyed rebuliding the motor myself. But electronics is not my specialist subject and altering pin outs and stuff scares me.
I know places will convert it for me but the total cost is now getting up to where I'd be if I settled for Link G4 or the like.

The igniter and MAP sensor part should be OK but it's the loom and ecu mods that worry me.
Also didn't someone on here do it then have problems with the car not reving?
Would like to hear from someone who has done it themselves with no problems.
JB