The V8 Owners Forum -

Nice one! I have found that you can go very lean on the cruise with the annular booster design which is good for MPG! You may have to go very large on the secondary jets in order to get the AFR around 12.8:1 at WOT, I think this is because the signal is poor on the primary side, I am beginning to th...

I may get distracted and but a 500 cfm edelbrock thunder carb anyway :D If you are up for fitting another carb check out the 500 AVS2 carb, it uses the annular boosters. Here is a link to a youtube vid on the carb... https://www.youtube.com/watch?v=3npwfIOdKPc I actually have a big bun fight in the...

The engine flows well, is was built for the Tuscan challenge series, but I may need to go to a 500, we will see. Getting the headers out is a PITA for boss welding, may be able to get to it well enough in situ. Thanks for the inputs. The only difference between the 500 and 600 apart from the jettin...

You are better off welding the bung in the exhaust down stream of where the individual headers join together, you get a more steady reading on the AFR meter. If you do find a rolling road operator that you decide to use ask them whether they stock the rods, jets and springs. They might say that you ...

I've never had much luck setting up a 600 on what is really considered to be a small engine (mine is a 4.6, gas flowed big valve head, all the usual stuff!), I spent weeks messing about with a 600 carb, I also modified 500 boosters make them flow the same CFM as a 600 booster whilst retaining the 50...

I've yet to find any rolling road operators that know anything about how these carbs work! In the end I learnt how to set these carbs up by using an actual road and an Air/Fuel ratio meter (lambda probe). I guess my post is not all that helpful but all that I will say is watch out for rolling road o...

I actually think that the non-timed port should always be used if possible but hey ho, that what forums are all about! The other thing to throw in the mix is that there are at least 4 different vac canisters that Rover/Lucas used, they differ in many respects as to how they operate when a vacuum is ...

I guess that is fair enough, I have a shed load of old Lucas dizzies kicking around and have seen that the mechanical advance can differ between them, I don't fully trust the numbers that are stamped on them, they seem to be out by a few degrees quite often. I must admit that my acknowledgement of 3...

How have you worked out that the mechanical advance is giving 26 degrees?

Thanks for the update on your progress. the vac canister must be connected to a non-timed port which I think is good, your vac system can add 16 degrees to the timing which is reasonable. The 36 degrees all-in figure is also reasonable as long as none of this timing advance is being added by the vac...

I don't know the setup of Rovers EFI system and how it relates to the ignition timing, really Edelbrock 4 barrel carbs are my 'thing'. If your timing is only advancing 2 degrees when you connect the vac pipe then I would say that the port that you are connecting the pipe to is not really seeing any ...

The marks are 2 degrees apart, If the manual states 2 degrees BTDC that will be with the vac canister disconnected, it will idle like a bag of spanners when running with this figure so I suspect that the vac canister will add around another 12 degrees as soon as you plug it back in, i.e. its not con...

Some sort of degree tape on the damper is always a good idea but you have to ensure that the TDC mark really is at TDC. The pointer can be out by several degrees. A piston stop and some maths and patience is required to get the tape setup correctly.

I run the Edelbrock pump, its not cheap but it's fairly quiet, it has an internal bypass so it won't stall and does not need a regulator, with any pump you need to be sure that it can provide enough fuel for the engine at WOT. The Edelbrock pump can supply more than enough fuel for my 300 BHP 4.6 an...

I use a Helix paddle clutch in my 4.6, you can get a bit of a judder just as the clutch bites when you are pulling away from a standstill but after that it's OK.