The V8 Owners Forum -

Yes have swapped over sensors and control units but always the same. From memory plugs have been a reasonably even colour but one or two richer. I'll check again tomorrow and post the result. Although the Edie has duel ports it does feed into a offenhauser 360 manifold which is basically like a plen...

Yes I have Lambda probes in both exhaust system connected to dash board gauges. I have owned this car for 10 years now, most of them happily messing around with the carb settings. I've even resorted to making my own control rods but with limited success. When putting my foot to the floor (low vac), ...

Wow, and there's me thinking 25 mpg was good! I am using an Edie in my 3.9 RV8 with 65/57 control rods. The second stage of 57 is actually too rich, unfortunately I'm limited to the rods available and this would appear to be the best compromise combination. I have been using blue or pink springs to ...

I have a 3.9 RV8 Dax Rush weighing 765 kg running on an Edlebrock carb and crane 224 cam. When cruising at 70 mph it will return 25 mpg. I’m very pleased with this car especially after installing a bespoke 13 gallon fuel tank which has really enhanced the touring car experience. Unfortunately I have...

Thanks to everyone. I now have a much clearer picture as to the direction I need to take. I'm not going purchase and fit a 4.6 until October (lot of summer miles to enjoy first) so plenty of time to consider all my options. I've no doubt I shall be making further posts on engine options as time prog...

Thanks everyone for your input. As has been mentioned it is these secondary issues that are very important but difficult to assess; however, you comments have been invaluable. I already have clearance issues near the alternator pulley so do not want my V belt any further forward. So, as my present s...

Thanks Guys, you both make some very good points that gives me piece of mind and also saves me money. The reason I am staying with the Dizzy is that I don't have an ECU or associated kit and can't really stretch to the extra cost of doing so. Also I would need to modify the bonnet and fuel system. P...

I have a 3.9 RV8 in a Dax Rush kit car that I intend upgrading to a 4.6. I am running on an Edelbrock 500 and Dizzy which I wish to retain. This would be an ideal opportunity to introduce a Serpentine Intermediate timing cover solely for the purpose of gaining a crank driven oil pump. My question is...

Thanks everyone for your input. You know how it goes, you start off with the bare essentials at about £500 and before you know it, add a few bells and whistles and we are soon looking at £1000. Ian, that Holley Hydramat looks amazing. Too good to be true really but I guess if it is as good as it loo...

Hi all. Has anyone had any experience with anti fuel surge devices for carburettors? My car is a Dax Rush kit car with an Edelbrock carburettor powered RV8 and am in the process of having a bespoke long range fuel tank manufactured. One of the optional extras is to have an Anti fuel surge collector ...

Thanks all, some really useful information and your input has been greatly appreciated. From what you are all saying I feel happy to revert back and continue running without a Vac Advance. From my personal experience the car feels slightly unsettled / surges with the vac advance connected. However, ...

Johnny, Now that’s interesting. I wasn’t aware that the 1404 was not meant to run without a vac advance; however, I can confirm it definitely does run better without it. So now that I have solved the cause of the very rich running perhaps I’ll return to the 15 BTDC at idle with no vac advance and go...

I guess that’s what owning a Kit Car is all about. Even when its running well you just can’t resist the temptation to tinker. Like you I have been playing with various enhancements and have revisited the carburettor set up on many occasions, each time thinking I’ve got it right at that time. 3 years...

Thanks Sidecar and JSF55 for your input that I have taken onboard while continuing to resolve this issue. The principle of fault finding is ‘make one change at a time then test’. Pity I didn’t stick to it! I tried lots of changes and have overcome the rich running on cruise and the AFR now responds ...

Many thanks for your indepth and considered response. From the Edelbrock manual I have tried combinations 5, 6, 7, 11 and 10. All suffered with this same problem. The best performance combination I found was 5 (.083 main and 62/52 rod) where on light to moderate accelerate I get an AFR of 12.5. The ...