Fitting high lift cams on 3.5?
- Thread starter 90maniac
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discomark10
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Depends how high it is, might need new springs and/or piston work.
If not it just a case of taking the rockers of, inlet mani and plenum off, rods out, followers out, front cover off with timing gears+chain and remove cam/replace it all... providing the cam bearings are good!
If not it just a case of taking the rockers of, inlet mani and plenum off, rods out, followers out, front cover off with timing gears+chain and remove cam/replace it all... providing the cam bearings are good!
discomark10
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Land Rover Zone - View Profile: fett
Has a very good knowledge of cams.
Has a very good knowledge of cams.
discomark10
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i dont think that one will need spring/piston work
griffman
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Either the Piper Torque Max or the Kent H180 will just slide in - no problems.
The only thing you must ensure is that you shim the rocker arms correctly to ensure the correct amount of lift - they come with the cam and instructions.
Even though you have recently rebuilt your engine make sure you put new tappets in and use loads of cam lube.
Run the engine at 2000 rpm for 20 minutes from first start up and put fresh oil (20/50 Mineral) and filter in with zinc additive.
happy days
The only thing you must ensure is that you shim the rocker arms correctly to ensure the correct amount of lift - they come with the cam and instructions.
Even though you have recently rebuilt your engine make sure you put new tappets in and use loads of cam lube.
Run the engine at 2000 rpm for 20 minutes from first start up and put fresh oil (20/50 Mineral) and filter in with zinc additive.
happy days
fett
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if its got more than 0.43'' of lift then the standard valve springs cant cope and will need to be changed.
pretty sure the one from turners has more than that. I went for an aussie one becuase it has 0.427'' of lift, now thats being cheeky with the standard springs
pretty sure the one from turners has more than that. I went for an aussie one becuase it has 0.427'' of lift, now thats being cheeky with the standard springs
griffman
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if its got more than 0.43'' of lift then the standard valve springs cant cope and will need to be changed.
pretty sure the one from turners has more than that. I went for an aussie one becuase it has 0.427'' of lift, now thats being cheeky with the standard springs
Fett - Kent H180 fine with standard springs.
fett
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Griff I know it says that on turners site but if you talk to real steel they are not so sure!
so I did the maths:
11.2 millimeter = 0.440 944 881 89 inch
cant argue with that.
Also it would involve setting the lifter preload according to turners (I rang them) and for example the camtech cam I chose does not require that.
so I did the maths:
11.2 millimeter = 0.440 944 881 89 inch
cant argue with that.
Also it would involve setting the lifter preload according to turners (I rang them) and for example the camtech cam I chose does not require that.
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griffman
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I don't want to get into an argument with you - all I am doing is passing on the benefit of my experiences so far.
I live down the road from Turners and know Richard and Frieda well.
I have fitted two H180s and as long as the rocker arms are shimmed correctly then you don't have to change the springs.
Both cars are still in fine fettle many thousands of miles later.
Mark Adams himself recommends the H180 for all landrover applications with auto box up to and including 4.6 litres.
For other applications with a manual box(morgan, mgb, bowlers,etc)he says the piper 270 is the best all-rounder.
fett
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may well be good for some folks who do it every day and or are paid by people to have it done. for those who are doing it the first time at home themselves I would stick to the numbers.
Not sure if 4.6 springs are different/better than old 3.5 ones? never had cause to look in to 4.6 bits too much.
Not sure if 4.6 springs are different/better than old 3.5 ones? never had cause to look in to 4.6 bits too much.
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kent H180 has 0.09in lift more than you really should run with standard springs. piper 270 should get different springs. the H180 is pretty mild though, not really a huge change from standard cam. is yours a carb or EFI and what comp ratio as that will make a difference to the cam choice?
martin1512
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Which cam are you thinking of using? I have the Piper H200 fitted to mine. It has made quite a difference to the engine, more power & torque across the whole range. The advantage with the H200 is that it is both higher lift and longer duration, so the valve stays open for longer.
