slow stage 1

noexitroad · Post by **noexitroad** » Mon Feb 21, 2011 6:50 pm

over the last couple of years i have been working on an ex army stage 1. it is now ready for a wof check but a few trips up the road and about 80 kph is about all its good for without the noise becoming deafening!. it has a 4speed gearbox and salisbury diffs. were these beasts meant to be this slow or can i tweak it up a bit to give a better top speed?

nstacey · Post by **nstacey** » Mon Feb 21, 2011 7:01 pm

I could be wrong but I thought the stage 1 V8s had some kind of limiter in the carb or something compared with the Range Rover V8.

Ralfie · Post by **Ralfie** » Mon Feb 21, 2011 7:58 pm

They were never intended to be speed machines and are now 30 plus years old.

Depending on the condition of the engine it could be just tired.

The early V8's had restrictors in the base of the carb mounts to restrict the overall performance. If these haven't been removed then time to do so.

The old 4-speed gearbox is strong but can be a bit noisey as it ages.

What tyres do you have on it. A lot of the road noise can actually be the tyres especially if using cheap agressive type tyres.

noexitroad · Post by **noexitroad** » Mon Feb 21, 2011 8:06 pm

the carb limiter has been removed, it now has su carbs which are running well. the tyres are savero m/t's which are probably not the best on the road i admit. i thought that the army lr's may have had a different diff ratio or something that i could change

Ralfie · Post by **Ralfie** » Mon Feb 21, 2011 10:38 pm

Savero M/T's are quite noisey. Are you using larger diameter tyres?

Diff and gearbox ratios basically same as early Range Rover and early 110's. 3.5 diffs.

You can change diff ratios but replacement 4.1 C&P sets are usually around $1,000 plus new or you could go to 4.7's from the earlier series Land Rovers.

niblik · Post by **niblik** » Tue Feb 22, 2011 7:11 am

i'd say its the gearing man.. my s2a lwb only gets to about 80 km's nicely...

noexitroad · Post by **noexitroad** » Tue Feb 22, 2011 9:27 am

there are a couple of env 4.7 diffs on tme at moment, would they straight swap in and how much would it change things? for $250 that they are asking for them it wont take long to chew thru that amount of petrol the way its going now. also been told that the gearing in the transfer box can be altered. has anybody tried this option? the tyres are 265/75/16's. i have some alloy rims so will look out for some road tyres at the right price which will probably make a big difference too i expect

Ralfie · Post by **Ralfie** » Tue Feb 22, 2011 10:12 am

The problem with the ENV diffs is that they are not designed for permament 4WD that the Stage 1 V8 is. Apart from that they should bolt up with minimal fuss although you will have to alter drive shaft lengths to suit. You will also loose some clearance under the diffs as the ENV is a lot bigger (and heavier) diff.

The transfer gearing can be altered but that would be to Range Rover gearing which is higher as the RR only had small tyres (205's) compared to the Land Rover (750x16s).
Your 265/75 tyres are the right height but are wider than original fitment. This could be causing extra drag that the engine is struggling to cope with.

Possibly time to fully check out engine, compression test and tune properly (very hard to balance both carbs properly). Could be time to overhaul engine.

Landynut · Post by **Landynut** » Tue Feb 22, 2011 2:25 pm

were all the salisbury diffs 3.54:1 ?

sure the couldn't be 4.7:1 ?

I've got 3.54:1 rangey diff heads in my series 3 and they are a heck of a lot quieter than the 4.7:1 original diff heads, which produced an ear piercing high pitch whine almost drowning out the engine doing 3500rpm to achieve about 80kph . . .

on the 3.54:1 diffs its doing about 2500rpm at 80kph.. certainly easier on the motor...

hums along at 100kph without breaking a sweat, max speed recorded on the gps was about 140kph which is crap-your-pants material in a series truck . . .

have you got free-wheeling hubs or is it permanent 4wd? could be your transfer case howling like a wounded dog... ?

Stage1V8 · Post by **Stage1V8** » Sun Feb 27, 2011 4:42 pm

Chappy has asked the same questions and provided the same answers on the Stage 1 V8 forum. Not sure where he's coming from.

But I have to ask, why the hell would you want to replace the Salisbury for an ENV?? Changing the diff ratios to 4.7:1 would make you go slower, not faster, wouldn't it? But, even if it did make you go faster, at what cost?

Also, do ENV have CVs. The Stage 1 does. And how will it deal with the cardan on the front prop shaft.

The suggestions you were provided with on the Stage 1 V8 are pretty much the same as those you have received here.

noexitroad · Post by **noexitroad** » Mon Feb 28, 2011 6:49 pm

you are right, the env diffs would be a step in the wrong direction....it would make it slower. i have asked the same question on the stage 1 forum expecting some more ideas, i am surprised that nobody overseas has commented on the transfer box gearing that i found out about at my local garage and confirmed here. it just shows that some of the better advise is closer than you think

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