It's the carbs, not the engine type Are you finding that you're running really rich at idle? Then that can be attributed to a high fuel pressure!! This is why I always swap to a regulated electric fuel pump when putting on after market (twin) carbs
Paul: Yes it does seem a bit rich at idle, although I haven't driven it much over winter so can't remember exactly. I have one of the CB air/fuel gauges connected to a lambda exhaust sensor. It often reads Rich when i glance at it, but i don't think it is very accurate. My engine is 2110cc, twin dellortos (not sure which), run in properly and has been set up on a rolling rd in Summer 2013. The accelerator needs some pumping to get fuel to the carbs if i haven't been driving the van for a while, the old kadrons and old engine didn't seem to need any pumping. Is fitting a regulated electric fuel pump a job for my normal mechanic or the rolling rd specialist? I think my post has made it clear that i shouldn't try fitting it! Can you recommend the exact regulated fuel pump and any other bits i need, to suit the dellortos. Sorry if i've hijacked the thread, but i'm very glad i stumbled across it, I hope my fuel efficiency improves!
Either a CB rotary pump http://www.cbperformance.com/ProductDetails.asp?ProductCode=3193 or the Webcon Universal http://www.webcon.co.uk/shopexd.asp?id=48 would work fine. For safety reasons electric pumps should be wired through a relay such that if the engine stops so does the pump. I use a fuel injection relay: http://www.ratwell.com/mirror/www.dolphinsci.com/relay.html
WHS^^ I use the CB pump, tried and tested on my van, so I'm happy with it It is something that a general mechanic can install... no need for RR time
Thanks very much 77 Westy and Paul Weeding. I will go for the CB rotary pump. I'll also ask the mechanic to source a suitable relay as well, that ratwell article was interesting, but i have no idea what i need to buy relay wise!
I was going to say you can get the relay from VWH but they are out of stock available ‘soon’, here’s the link anyway:.http://www.vwheritage.com/vw_spares...untry_GB.htm?gclid=COKp38eW5bwCFcUSwwodDRUABg You could get the relay from a breakers, they’re fitted to fuel injected Golf’s, Jetta’s, Passat’s etc., or eBay http://www.ebay.co.uk/itm/VW-Golf-M...Parts_SM&fits=Car Make:VW&hash=item19e3310fea There are also other ways to provide power to the pump - you could just wire it through the ignition switch or use a standard relay triggered from the oil pressure switch/ignition lamp. Some people use two relays, others have a bypass switch to prime the carbs. But the fuel injection relay does that automatically and I found it the best solution for safety and ease of use.
It is. Turn the key and the pump runs for a few seconds to prime the carbs, it then stops until the engine cranks and the relay picks up the signal from the slowly rotating distributor. If the engine stalls the relay trips after about ½ second and the pump stops. I have the relay in the engine bay on the bulkhead next to the alternator regulator.
I probably used poor terminology, but I have to press the pedal multiple times before the engine starts, if I haven't used the beast for a while.
great thanks. What I would like to do is have a relay before this one that acted like some fog light switches in that it resets when you turn the power off and have to reselect it each time as a security feature but cant find a relay that works like that.
I was going for the CB performance fuel pump & relay, but after reading a few threads and speaking to the bloke who built my engine I've ended up installing a Filter King pressure regulator and filter. I'll update the thread if it gives any noticeable improvements such as fuel economy
