biketeacherdave
Well-Known Member
Drive it in 3rd like the manual says or dare I say it........your lobes might not be very loby 
discool
Well-Known Member
If I wanted a little more BHP from George (2000 V8 4.0) I would be thinking K&N panel filter and some different exhausts. But what about manifolds (or headers for them over the water)?
My question is, who's done what without going mental with cash and how has it panned out.
Fanx
If they are still manufacturing exhaust systems for LRs then fit a Janspeed cat-back system, and you could be surprised.
I did 6 or 7 years ago and there was a noticeable difference, it must be just because the engine breathes better, on starting the engine straight after fitting the idle revs whent up to 2000 and stayed that for around two minutes or so then dropped back down to normal possibly the EFI ECU thought it better do something about it.
Anyway I'm pleased, mid-range exceleration is quicker once past 30mph, although top speed hasn't changed 110 on the flat 120mph downhill when rev limiter cuts in.
As a comparison....
The 4.0 GEMS is the one at the bottom of the punch bowl
The 4.6 GEMS is comparable with the 4.0 THOR
The 4.6 THOR Is king of the hill for the P38.
martynv8
Well-Known Member
I'd go with that, but only test driven a 4.0 gems so never compared a 4.0 thor to my 4.6 thor.
cooltide
sheep fancier
Thor is great for torque
As for a 4 litre gems, not worth putting lots of money in to try and match a 4.6 unless you need a new cam and you need a new exhaust. Chipping is crazy money and will make very little difference.
Trouble with more power is it is very moreish like heroin.
As for a 4 litre gems, not worth putting lots of money in to try and match a 4.6 unless you need a new cam and you need a new exhaust. Chipping is crazy money and will make very little difference.
Trouble with more power is it is very moreish like heroin.
