ECU 430 BV or not??

[67Fox]

I have read many a threads on this BV or not BV subject.
But I was thinking maybe some clever person on here (not me) might be able to look at these photos of my ECU to determine if the ECU has a code of colour etc.. to tell if it was a BV or not?
Any ideas?
Oh, I have a 93' 430 (BV?)

[67Fox]

davep said:

Jason has written 4.3 BV on the ECU label, so it's reasonable to assume that TVR made some attempt at mapping your car as a 4.3 BV. One way to accurately determine which tuning/mapping you have is to check the tune resistor value (more than likely to be White for Fuel Map 5 if the car has Cats), then connect RoverGauge and copy down the PROM contents for evaluation. For more information see this website:

http://www.stevesprint.com/remap-14cux/LR-TVR-sett...

and

http://www.stevesprint.com/remap-14cux/bins

Note SteveSprint's request for a 430 CAT (BV even better) tune!

Edited by davep on Wednesday 27th May 11:16

Thanks for the info Dave.
If /when I can get roverguage I could download the ECU map for Steve.
Where should I look for the "tuning resistor" (value) exactly?

[67Fox]

Chuffmeister said:

Original sales invoice/ documentation that came with the car. Failing that, I should imagine heads off/ inlet manifold off to be certain. The ECU gives the impression it is a BV, but a bit of black marker could have easily seen to that in order to increase previous sales values... if you catch my drift Also, it wouldn't surprise me if TVR just chucked on the first ECU they had to hand.

I'm, not sure whether you can check this using a borescope. I hope it turns out positive as they're a rare car.

Yep exactly my thought too Chuffmeister!
That's why I thought I would open the ECU up and maybe someone could see with a "chip" number /type it would be BV or not.
I have bought a borescope as that would be be my next idea to look into the engine. But that's another avenue to explore I suppose

[67Fox]

blitzracing said:

Ive got the cables for sale on PH under TVR parts.

http://www.pistonheads.com/classifieds/parts-and-p...


Also check the chip with the black tape- some times you can read something like 4.3 cat in pencil on the tape.

Thanks Blitzracing. I do know its a 4.3 as the engine number says so and it has cat's as I have Lamda sensors.
The question was about the BV or not BV. I was hoping that a look inside the ECU might bring something.
But thanks for the feedback.
I will look into what DaveP said earlier in the thread. SteveSprint etc... and buy a Rovergauge connector set.

[67Fox]

OleVix said:

You might want to relax because it has been said more than once that the regular 4.3 has almost identical power output to the BV. They are both ported and balanced and with valve reliefs in the pistons. But the restrictions to more power is not just in the valves, but in intake trumpets, AFM etc. Meaning the slightly bigger valves on the BV means feck all

Well then it's time to sit back relax and crack open the beer

[67Fox]

davep said:

The passenger footwell loom/bird nest is where you'll find the tune resistor, see here:

http://www.pistonheads.com/gassing/topic.asp?t=939...

The resistor is colour coded: White for cat engines (Fuel Map 5), Green for pre-cat engines (Fuel Map 2). All pre-cat BVs run with Fuel Map 2, so it'll be interesting to see if yours is a BV running with Fuel Map 5 and how it's tuned.

RoverGauge can be downloaded via the Internet, all you then need hardware wise is an interconnect cable:

http://www.pistonheads.com/classifieds/parts-and-p...

Your next question will probably be: Just how big are the TVR BV spec valves? Answer is here:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Hi davep,
You mention a tune resistor that has a colour, but in the linked picture it is not clear. What needs to have the colour?
The wiring to the resitor is white, the clear cover over the resistor is yellow'ish.
In my limited knowledge a resistor has serveral bands on it with colours giving the value of ohms.
Sorry if i seem dim

[67Fox]

Hi Steve,

No problem with the delay Steve

That's great news, I have sent you a PM to thank you for your efforts etc...
cheers Simon