anyone know the spec of the standard x-bolted 4.0 LR P38 Serp Cam sharft.
Thanks
Leigh
P38 4.0 Cam Lift
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P38 4.0 Cam Lift
Current V8 car TVR 400SE 240 BHP
Current Project TVR Tasmin Race, with 3.9 running at 230 BHP
Currently building a 4.6 300 BHP Xbolted Engine for it. Solid Lifters and Group A rockers, Stange 4 heads, Pocketed piston, fully balanced.
Current Project TVR Tasmin Race, with 3.9 running at 230 BHP
Currently building a 4.6 300 BHP Xbolted Engine for it. Solid Lifters and Group A rockers, Stange 4 heads, Pocketed piston, fully balanced.
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russell_ram
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CastleMGBV8
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The 4.0 cam would appear to have livelier timing but has very little lift @ .391"
the 4.6 is softer and designed for torque which explains why it only produces 220BHP in standard High compression spec.
Leigh if your looking to get close to 230BHP I'd stick with the 4.0 cam and do a little work on the heads,
Suggest openening out the throats behind the valves to seat size as essential, bullet the guides and port match the ports and inlet to gasket size, you should already have waisted stem valves. Mill 20thou off the heads to give approx 9.75/1 and this should give you close to 230BHP.
Kevin.
the 4.6 is softer and designed for torque which explains why it only produces 220BHP in standard High compression spec.
Leigh if your looking to get close to 230BHP I'd stick with the 4.0 cam and do a little work on the heads,
Suggest openening out the throats behind the valves to seat size as essential, bullet the guides and port match the ports and inlet to gasket size, you should already have waisted stem valves. Mill 20thou off the heads to give approx 9.75/1 and this should give you close to 230BHP.
Kevin.
