Page 3 of 3
Re: EDIS timing map on stock rover v8 4.6 with 4.2 cam
Posted: Tue Feb 14, 2023 2:45 am
by garrycol
SuperV8 wrote: ↑Mon Feb 13, 2023 10:35 am
Load is critical for timing - which this simple list is missing.
Your timing advance on your table is not changing with load - only RPM.
Is it??
My the 3.5 RV8 fitted to 24v Landrover FC101s does not have a load input - eg vacuum advance and runs fine. The same with my Haflinger - no vacuum advance and it runs fine - all standard and not modified.
Re: EDIS timing map on stock rover v8 4.6 with 4.2 cam
Posted: Tue Feb 14, 2023 8:14 am
by SuperV8
garrycol wrote: ↑Tue Feb 14, 2023 2:45 am
SuperV8 wrote: ↑Mon Feb 13, 2023 10:35 am
Load is critical for timing - which this simple list is missing.
Your timing advance on your table is not changing with load - only RPM.
Is it??
My the 3.5 RV8 fitted to 24v Landrover FC101s does not have a load input - eg vacuum advance and runs fine. The same with my Haflinger - no vacuum advance and it runs fine - all standard and not modified.
Both of your vehicles may well run - but they would run more efficiently if they had some sort of timing adjustment based on engine load.
Engine load effects the density of the air fuel mixture in the cylinder which effects the flame burn speed - so if you vary the timing based on load you get a more efficient/cleaner burn.
Re: EDIS timing map on stock rover v8 4.6 with 4.2 cam
Posted: Tue Feb 14, 2023 6:27 pm
by stevieturbo
TPS vs RPM is a measure of load.
Not the one I would prefer, but it is still a measure, estimation of load.
I would prefer MAP as already said, but for such an engine, not that big a deal really.