I am looking at buying a land rover stage 1 V8 to take me to my static caravan in cornwall and back a few times a year and i know the std stage 1 engine is de-tuned to 90bhp which doesn't help with the mpg between 10-13 mpg and i have hered that whilst uprating the engine to early range rover speck 135bhp it will slightly improve the mpg to around 20 mpg by replacing the cylinder heads to range rover cylinder heads is this true and if so will i need to change the cam aswell.
i am not looking for a rocket ship with diesel mpg but 10-13 mpg is just stupid.
If it has a high mileage I would look for a 3.9 instead, and change the transfer gears to the RR 0.996, that would give the best possible mileage.
The stage 1 pistons are low compression, they would need changing to get RR spec compression, the heads were the same as the late 3.5s, SD1s. I believe the cam hs different timing also. I had a 1980 RR with a 3.9 cam, 0.996 transfer gears (HC engine) and was very impressed with it. My 85 110 was originally the same as the stage 1, very sluggish and noisy.
paul c wrote:My 110 now with 3.9 and auto, disco transfer box is doing around 18mpg, about as good as you would probably be able to get from the stage 1
I am looking at buying a land rover stage 1 V8 to take me to my static caravan in cornwall and back a few times a year and i know the std stage 1 engine is de-tuned to 90bhp which doesn't help with the mpg between 10-13 mpg and i have hered that whilst uprating the engine to early range rover speck 135bhp it will slightly improve the mpg to around 20 mpg by replacing the cylinder heads to range rover cylinder heads is this true and if so will i need to change the cam aswell.
i am not looking for a rocket ship with diesel mpg but 10-13 mpg is just stupid.
what do you all think
The single mod which would improve consumption most would be to up the CR. To about 9.75:1
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Not too sure if mpg would improve.My brother has a stage 1 and he used to get 18mpg with the original 3.5 with restrictors removed.He now has a 4.6 in it and the mpg is the same.
Hi
Anything that improves engine efficiency has the potential to give better MPG, removing the restrictors will improve eficiency however weather you get better MPG is down to your right boot, you may just get every where quicker and see no improvment. It is a rover 3.5 on carbs (though SUs are pretty good carbs) in 2.5 tons of vehicle with the aerodynamics of a medium sized shed, be honnest with me how many miles per gallon do you expect to get?
If you want good MPG, stick a 4.8 chevy LS motor in it with a decent 5 speed box andrange rover diffs in both axels or a T5/6 six speed and the existing axels and the auto transfer box ratios and you may see 22 to 26 to the gallon on a run if you drive it carefully, however you can but a lot of petrol for the cost of doing that.
Best regards
Mike
