ecu model question

[anonymous-user]

[redacted]

[blitzracing]

There are just two basics ECU types PCB wise and the Eproms are not Interchangeable, the change occurs around 1990. I can supply PCB layout if you need for the differences. The part numbers on the outside are for the original fitment- ie Land Rover / Range Rover or whatever and the cases are different, its not a checksum. There are also multiple variances of firmware over the years, although all the loom connector and functions of all the sensors remains the same. The Eproms are the common 27c128 or 27c256 series. The TVR ones simply have a fuel map for whatever car its used in, otherwise they are the same across the board. As for Eprom speed, the ECU processor is so slow any Eprom within the last 20 years will be fast enough. You can get recon ECU's for silly money, but I doubt you could get a new one, not that Ive tried as there are plenty of 2nd hand ones around.

[blitzracing]

Im not in the business of selling ECUs, but the last 3 units Ive purchased off Ebay have been fine at around £35 each and as the majority of faults seem to be either water damage or a damaged socket. Ive yet to see a genuine component failure. I suspect that a recon job involves a new coat of black paint and a clean and not much else.

[blitzracing]

The Tornado is a Mark Adams product, and the chip itself is labeled as such and it has a scrambler board below the Eprom. You cant read these with any sort of copier directly. Mind you, you dont have one of these by the sound of it, yours sound like a bog standard TVR chip. I suspect the chip was sold in its own right and the TVR one put back i as the Adams chips have a reasonable resale value. You can copy the TVR chip quite easily if you wish.

[MPoxon]

This is what a Mark Adams Tornado EPROM looks like. You can see the scrambler board between the EPROM and the socket.

[blitzracing]

Put them on Ebay for at least £100 as a "race chip". It does not matter that the map is designed on a per engine / tune basis, just say the magic words 350 bhp and watch the money roll in........... (dont forget to add £10 for a 40p plug socket as well).

http://www.ebay.co.uk/itm/ROVER-V8-ENGINE-RACE-ECU...

[blitzracing]

Those two ECUs should be cross compatible Eprom wise. If you send me your email address, I can send you both the ECU numbers and board identification data if you want.

[kolling]

Hello guys,
Does anyone know if a 14CUX in a 1992 pre cat Griff 400 can handle inputs from Lambdas if I want to install a cat? The wiring is there, but I don't measure any supply voltage to the Lambdas.

[blitzracing]

It should. The lambda supply is like the fuel pump and only there on a running engine, so you wont see anything with just the ignition on. You will need to change to the white fuel map with a resistor change. I cant see much point however, as a precat map gives better low RPM manners (less shunting) and better MPG as it can run leaner at light engine loads than the cat map holds the mixture.

[stevesprint]

blitzracing said:

It should. The lambda supply is like the fuel pump and only there on a running engine, so you wont see anything with just the ignition on. You will need to change to the white fuel map with a resistor change. I cant see much point however, as a precat map gives better low RPM manners (less shunting) and better MPG as it can run leaner at light engine loads than the cat map holds the mixture.

Yes, I've connected a pair of 14CUX lambda probes to the redundant lambda plugs on my 1992 Precat Griff 430 and the CAT map runs corectly. The CAT map in the TVR Precat 400 chip is the standard Land Rover CAT map with a lower RPM limiter @ 5400 and will run leaner which is good for the pocket but bad for power plus maybe bad for smoothness depending on your cam.

Steve