Wow! That is amazing. Thank you so much for your dogged detrrmination to get to get to this. I have just got home so haven't had time to read through the whole thread yet, but to see that photo brought a broad smile to my face after a hard day...
Yes that's what I'm thinking. The black pipe is just that ie pipe, but I'll take another look at the thread on the other side over the weekend. I've just ordered an amal main jet off ebay for a couple of quid and hopefully work around that.
So, for what its worth, I had the same probpem with my Stromberg carbs, extremely pronounced in the Tunesian desert (go figure). Was definietyl heat induced, as the carbs were basically boiling while you could touch the engine block without too...
A red top will be fine. The carburettored RRC had them as OE fitment. I'd suggest putting a filter ahead of it so you can easily see if it's dirty. They have an internal filter (behind the hex cap) which cannot be easily monitored.
First photo shows the fuel supply in and supply off to the left to 2nd carb.
2nd photo shows supply coming over from firs carb and the return to take pipe.
As above a pic of your setup may help.
As I said earlier there maybe a restriction, I also thought they were at the carb end.
SUs don't need/take much pressure.
Whatever you use make sure it cant get loose and end up somewhere it shouldn't ;)...
That's a good idea too.
I think the newly overhauled carbs are so efficient now that the fuel is by passing them and pumping straight back down the return and back to the tank. Path of least resistance sort of thing.
Can you take/post a photo of the rear of the carbs(pipe work)
As for a restriction,put a very course thread screw in the pipe,cut the head off(the finer the thread the more a restriction)
So the feeling of ecstasy was short lived. But it makes sense. The removal of the screw blocking the fuel return now leaves insufficient pressure. Although it ticks over fine and no longer overflows, a test drive showed that it doesn't pull under...
I'm thinking a tank removal happened at some point and it was a plug. But would have been fairly hard to miss when it went back together. That said it was screwed in a long way.
Well thank you so much everyone. There was a bloody great screw inserted into the fuel return pipe when I removed the pipe from the petrol tank! Removed it and put the pipe back on. I ran for 20 mins and no overflow!!! 'm ecstatic!!
Hi yes. Well remembered! They came back from Burlen and it's fixed a weird runnin g issue I had. They had these weird over run valves fitted which have now been ditched. Flats, needle valves, seals all replaced. Definitely coming from the...
Standard pumps are mormally 6psi. Good enough for v8. If you have a rubber pipe near the pump just squash/restrict with grips & pump should stop.
Photos of pump may help.
And I think your problem is float height settings.
How are the tips of...
It's a 3.5 v8 (out of an early range rover).
Floats, float heights and needle valves all spot on. Will check all the pump stuff when I get home from work. Thanks vey much everyone.
Photos of pump? Not familiar with red top pumps. Do you use a swirl pot or tank? I suspect you might have a EFI pump. Get the standard RRC pump and see what happens.