insaneron wrote:
Sorry guys for not being working hard to pay for the repairs. the engine is still in the car,
I'll try and anwser what I can. I've had some long chats with Trev as well. The frot 2 plug there is nothing at all left from the thead to the tip. The strap insulator and electrode, the heads a not to bad just a clean up 4 valves and recut the seat to both front cylinders, obviouly 2 pistons and rings. The pistons and valves have been ordered but 5-6 weeks order. I will be pulling the block over next weekend I will post picks of the plugs later. The Spider Inlet, carb and fuel pumps have gone to an F1 team to try and recreate our launch which is around 1.5 G to see whats happening
If you are using low pressure / high volume fuel delivery with fuel jets still at the pulsoid outlets to feed the spider you may well have re-created my problems from last year on my smaller engine.
I could not figure out why my front plugs leaned out only on track and not on the dyno.
The Rover V8 on a carb setup is well known for this issue even for road use with folk who have done the testing. On a Rover V8 road car with a carb you will often find that the rear plugs always look blacker than the front pair.
This is why I opted to run a higher fuel pressure of 12 psi and fit the fuel jets in the spider legs. This seemed to suit my engine much better. But then I was running a 300hp shot on a 200hp engine. So I had to make sure I had fuel or even excess fuel where I needed it.
I am going to re use my spider on the other car but I'm going to make new fuel legs to my own design to see if my theory works out.. And I will be running a 3 bar fuel system with this new engine on my Escort. My idea is to get the fuel to squirt out in front of the nitrous stream in the runners. It may not be ideal for all engines. But I think this will be the solution for my particular V8 setup. And I ended up having to jet the short runners much richer on the original spider setup as my inlet manifold does not have equal length runners.
Regards
Perry