West Slope Rover
Well-Known Member
Quit your crying. Life is change.
stutab
Well-Known Member
I agree with you in some respects. If you are going to butcher one by bobtaleing then sacrifice a disco. Keeping it looking the same but adding a few extras to improve it's performance then go for it.
BigJock2007
Member
[/QUOTE]The bit about weak fuel maps is cr-p too,put around by companies who were selling chips to owners who couldnt know any different.It was just a poorly built engine stretched beyond its natural limit.[/QUOTE]
Fuel mixture is the only credible explanation for the greater prevalence of this fault in the 4.6s. The 4.6s developed much more torque at lower revs by virtue of the increased crank reach and stroke. At lower revs and under load these engines ran too lean (attempt at improving economy) and too hot, hence frequent overheating, but the 4.6 was more frequently a victim because of this.
I hear you on the chips, and I thought about getting my P38 done as the feedback on this forum is actually pretty positive I think.
Jock
Fuel mixture is the only credible explanation for the greater prevalence of this fault in the 4.6s. The 4.6s developed much more torque at lower revs by virtue of the increased crank reach and stroke. At lower revs and under load these engines ran too lean (attempt at improving economy) and too hot, hence frequent overheating, but the 4.6 was more frequently a victim because of this.
I hear you on the chips, and I thought about getting my P38 done as the feedback on this forum is actually pretty positive I think.
Jock
300bhp/ton
Well-Known Member
300bhp/ton
Well-Known Member
What sort of off roading are you doing that you actually need more power?
BigJock2007
Member
Now that's a fair point. I assumed I was going to be wandering off up the misty mountains where no one had been before and would need more power to defeat Sauron. But come to think of it, probably not.
Question has been answered: a 3.5 it is.
thats average..town/motorway..never got better in the discos or rr i have had..
200tdi ayre
Well-Known Member
I'm seriously considering converting mine to manual, hating the auto ATM 
stutab
Well-Known Member
I'm seriously considering converting mine to manual, hating the auto ATM
I am converting mine to manual during the rebuild. Got all of the bits for less than £400 just got to fit them.
300bhp/ton
Well-Known Member
Nope not in my experience. I think you must have had a heavy foot, lots of town stop start and then drove too fast on the m/way if that's all you "averaged"
An old 3.5 carb RR we had, if you thrashed the living #### out of it would still return 12.9mpg. A V8 90 I use a lot will do an easy 17mpg average and upto 19.
The 4.6 HSE's we've had would do almost 21mpg on a longer run and read 16+ the rest of the time.
12mpg is certainly possible I admit, but it must either be you or your use that cases such low overall averages if its happened on multiple vehicles.
norseman
Well-Known Member
Sorry Zen but I don't keep a bucket of sand in the shed & I'm too old to believe in fairys! Two years ago I did a 632 mile round trip with my current 3.5efi auto & used just over 28 gallons. I estimate that 80 odd percent of that mileage was motorway, with the rest a mixture of A roads, country lanes & town.
West Slope Rover
Well-Known Member
My 4.2 get 17 mpg most of the time. More if on the highway with no starts and stops.
