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3,9 V8 Can shaft


naci
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Dear All,

I have two 3,9 efi V8's

first one is on 1996 Disco 1 with auto box & 1:22 tc gearing - runnng 255/65/16 road tires - having RP4 cam

second one is on 110 defender, with ltt 77 manual gearbox & 1:22 tc gearing - running 235/85/16 bfg - having standart cam

the only difference I can feel btw those, the disco gets revved a bit more slowly than the defender

I am now looking for a camshaft for my defender other than RP4 which would give me some good low range torque...

any suggestions please???

thanks and regards

naci

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My knowledge of cams:

3.9 standad cam gives good torque at the low range ~@2000Rpm

4.0 cam will give the same troque value but ~@4000Rpm.

I am glad someboyf finally replied :), thanks very much...

actually I am still looking for a after market camshaft which is specifically designed for giving such torque at lower revs...

hence I am still waiting to hear from the other forum members who has some previous experience of such camshafts with respect to its maker and model of such camshafts...

thanks in advance

naci

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You could try the new Real Steel Cyclone cam or the Piper Torquemaster. Both are high torque cams for use in 3.9 - 4.6 engines and can be used with auto boxes with good idle.

The Cyclone gives an extra 27ftlb.

Another cam is the Crower 50229 from V8 Tuner.

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I remember some discussions on the subject on the discoweb.org LR forum in the US. A quick search showed some threads on the subject, including some reports about the above mentioned 50229, so I suggest to have a look and maybe post a question there.

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Hers a few to consider :

Other things to consider are :

General condition of the engine

Rev Limit and type of driving

use of V8 on / off road / towing

Any other mods inc exhaust

FWIW With any performance can I would suggest

ARP Head Bolts / Crank end bolts

Steel Timing Gears and Duplex Chain

fior 3.9 Valvoline VR1 Racing Oil & new filter

NGKBP6RES Plugs if not already fitted

Check and recheck Timing and dizzy is advancing fully

HTH

Nige

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