The V8 Owners Forum -

Just for your interest.
That doesn't look like the standard plug which, from my experience is a male/female bullet type connector (Lucas?). I don't think the standard connector is available any longer and this may have been changed to this type by a previous owner particularly if an aftermarket ...

This is what my tune resistor looked like……different colour as I did not have cats, but that was CUX ecu
https://powersperformance.co.uk/store/slug/tune-resistor-cat/

You could buy something like this and change the resistor to the correct value!
I also thought I may try a variable resistor so ...

Ah, 4CU not 14CUX, I'm not too familiar with that system but I believe the 6k8 resistor is common from previous conversations I've had.

Half of my wiring loom is missing too, there's no ignition supply to coil...I can make one up.


I'm a bit confused by this surely your coil supply would have been in existence prior to fitting EFi? (I'm assuming your car was originally carb' given the age) The EFi loom (I'm assuming Hotwire ...

Sounds like youve been here before...you know where I can get it, is it just a mini loom ?
Is that 6800 ohm value resistance?
Thanks Clyde


The standard resistor (at least on my loom) was a rectangular package around 10mm square, 5mm thick with male spade connectors on each side. You should be ...

What you seem to be describing is the ignition pulse current limiting resistor which is different from the tune resistor. On a 14CUX this is, I believe a 6K8 resistor although I don't know the wattage. There may also be a similar resistor in a branch to the tachometer feed.

Looking very good.

A nice project. Does make me wonder if there is any way to cross over the intakes and get a straighter air flow.
Would injectors be better closer to the inlet port? I've heard arguments both ways on this.

Hi Tom

I've held off replying to this as I've no knowledge of the GEMS system but as nobody else has got back to you I decided to give you my thoughts and at least give you a welcome.

I like your idea of keeping things simple and I think you have hit on some of the downsides to the GEMS, it is ...

I've only worked with the ECU from the later system, 14CUX, if I've understood correctly the Vitesse uses the older 4CU system and it seems this controls the fuel pump differently.
It seems that during priming the fuel pump is controlled by a time delay circuit/relay, presumably a separate module ...

Interestingly...

Whilst binnin 20+ years of shite, found some paperwork from the RV8 stuff and the DW270 Typhoon cam. Although it's probably readily available anyway

Intake Lobe centre 110deg ATDC
Lobe centre separation 110 camshaft degrees
Duration at 0.050" lift is 221 intake, 215 exhaust
Cam ...

Well I have the 'old' cam out now and taken a couple of photo's:
IMG_3775.jpg
IMG_3780.JPG

Seems to be marked on end DJE 218/220 (the DJE may not be quite correct) with a small section wiped out and a couple of small blue marks.
On the side of the cam just before the second (from front) journal ...

Thanks Frank

I've decided to go for the Piper 270i. They are made to order apparently with a lead of 7 days, hopefully that means I'll get it before the holidays and have some time then to get it fitted.
I checked out he spec's for their cams, lining them up side by side and it seems the only ...

Thanks Frank. I guess V8tuning or anyone else retailing the Hurricane cam will be in a similar position to me as, if I've understood correctly, Real Steel are the source for these cams.
I was looking at the Piper cams yesterday but got confused by the numbers, it would be really helpful if cam ...

Hi all, looking for some help on camshafts.

After investigating the cam I have in an finding it is a bit on the wild side (most likely Viper Typhoon - See https://www.v8forum.co.uk/forum/viewtopic.php?t=16222) and this is possibly what is giving me less than optimal running at low RPM & idle I'd ...