RR camshaft specs

Ralphh85 · Post by **Ralphh85** » Wed Aug 01, 2012 8:29 pm

can anyone tell me the cam duration an degs of opening/closing on a standard range rover cam for a later 1996 engine?

im trying to size up which cam i should go for.

Ralph

bodger · Post by **bodger** » Thu Aug 02, 2012 12:43 pm

P6:=

Inlet opens 30 degrees BTDC
Inlet closes 75 degrees ABDC
Inlet duration 285 degrees
Inlet peak 112.5 degrees ATDC
Exhaust opens 68 degrees BBDC
Exhaust closes 37 degrees ATDC
Exhaust duration 285 degrees
Exhaust peak 105.5 degrees BTDC

24G engine :=

Inlet opens 36 degrees BTDC
Inlet closes 64 degrees ABDC
Inlet duration 280 degrees
Inlet peak 99 degrees ATDC
Exhaust opens 74 degrees BBDC
Exhaust closes 26 degrees ATDC
Exhaust duration 280 degrees
Exhaust peak 119 degrees BTDC

as a rough idea

ChrisJC · Post by **ChrisJC** » Thu Aug 02, 2012 6:45 pm

Do you mean a P38 engine?

Chris.

Ralphh85 · Post by **Ralphh85** » Thu Aug 02, 2012 9:32 pm

erm, classic an P38 would be ideal

thanks for the info!

Ralph

ChrisJC · Post by **ChrisJC** » Fri Aug 03, 2012 3:50 pm

Tricky - it's not specified in the workshop manual for the P38......

Chris.

badger · Post by **badger** » Sun Aug 05, 2012 8:36 pm

P38 4.0
IO 28
IC 77
ID 285
IP 114.5
EO 66
EC 39
ED 285
EP ?

P38 4.6
IO 14
IC 70
ID 264
IP 118
EO 64
EC 20
ED 264
EP ?

russell_ram · Post by **russell_ram** » Sun Aug 05, 2012 9:44 pm

Ralphh85 · Post by **Ralphh85** » Thu Oct 11, 2012 3:23 pm

sorry to drag up old thread but just now tryign to buy a cam,

by the look sof it the 4.0L cam could be used as an upgrade to the 4.6 judging by duration??

is this a done thing? or am i being stupid?

Ralph

RoverP6B · Post by **RoverP6B** » Thu Oct 11, 2012 7:36 pm

Hi Ralph,

Rover (Land Rover) designed the camshafts to suit the engines, hence the reason the 4.0 camshaft is different to the 4.6. The latter also featured so it is my understanding the only asymmetrical camshaft fitted to a Rover V8 engine from the factory.

Unless the 4.6 has had appropriate work undertaken to the cylinder heads, fitting a camshaft with a longer duration than what was specified by the factory is really a pointless exercise.

You also need to consider as to whether the engine is running with a manual or automatic transmission.

Ron.

stevieturbo · Post by **stevieturbo** » Thu Oct 11, 2012 10:52 pm

Ralphh85 wrote:sorry to drag up old thread but just now tryign to buy a cam,

by the look sof it the 4.0L cam could be used as an upgrade to the 4.6 judging by duration??

is this a done thing? or am i being stupid?

Ralph

That is a fair assessment, but the 4.0 cam seems to have slightly less lift despite having more duration and running what appears to be a tighter LSA.
But it does look like a better cam

Is it actually worth buying a totally standard factory cam though ? it would need to be very cheap
Real Steel's cams are only £130-140 ( and obviously any new cam needs new followers )

Ralphh85 · Post by **Ralphh85** » Fri Oct 12, 2012 8:48 am

yeah shortly after posting i noticed that the lift was down on the 4L.

thing that made me say that was the 4L is similar to the kent cam i was looking at, infact it was more longer duration but like said well down on lift as the kent has more than the 4.6 cam.

real steel/v8 tuner etc are totally put off when i tell them its a P38 engine, i have a feeling they dont stock them, V8 tuner suggested i talk directly to kent or piper,

kent say £219 for a cam so think i will go for that.

follower wise do i need anything special? seen anti pump uo ones int he past but not sure who has them now.

Ralph

DEVONMAN · Post by **DEVONMAN** » Sat Oct 13, 2012 7:39 am

I believe Real Steel only stock dizzy drive type camshafts.

Denis