Thread: 4.6 in the D2

Originally Posted by SPROVER

I have a mafless tuned LS1 in a VX calais. It's an auto and it does lack down low torque. But it does like to be revved and makes good power after about 2500 rpm. That's why you see a lot of guys changing diff ratios in them.

the ratio in the auto is shocking.

manual all the way.

A nice high compression 4.6 rover V8 in a D2 would be a nice upgrade. Unless you have the cash, time and patience to do an LS1 conversion I wouldn't do it.

Originally Posted by Eevo

the ratio in the auto is shocking.

manual all the way.

Yeah I know That's why I have one in a Rover sd1 with 6spd and ls1

Originally Posted by ozscott

166 kW at 4,750 rpm and 407 Nm at 2,600 rpm. If the Chev develops about 446Nm @4400rpm then there is now way that it would develop the low down 407nm at 2600 as the little 4.6 achieves.

and just to shoot myself in the foot, the disco manual gearbox (R380) is only rated for 380Nm.

so in theory the 4.6 bosch will kill it. (not as quickly as the ls1)

Mate your right about the torque figures - didnt see the axis note at first.

CHEERS

Originally Posted by Eevo

and just to shoot myself in the foot, the disco manual gearbox (R380) is only rated for 380Nm.

so in theory the 4.6 bosch will kill it. (not as quickly as the ls1)

Haha...my 5 speed R380 is going to test that unfotunately!!!

Cheers

Originally Posted by ozscott

Haha...my 5 speed R380 is going to test that unfotunately!!!

Cheers

let me know how you get on.
so i can work out life expectancy when i match my 5 speed with an ls1.

Remember! my V8 was thought of and built to tow a caravan so it will never see over 3K.(maybe sans caravan and Di)
all the **** I speak is aimed at that one use,, Ok?

FWIW I think the 4HP gearbox ratios are the biggest thing wrong.
Huge amounts of torque are required to shift 4T with a 3 speed.
while it doesnt really need a lower first,(the V8's are truly excellent off idle) it needs a either a 4th gear around .8 or a 5 speed finishing at .8

just look at the first 5 ratios's of the 6hp,,