Phase 1/2 Engine differences?

[tarmac terrorist]

What are the differences between the phase 1 and 2 engines?
As far as I understand the difference is restricted to the cams and the inlet plenums. Am I over simplifying this? I know the gearbox is completely different, just interested in engine cross compatibility.

 

[Jamesv6]

The 3-litre 24-valve V6 engine has been thoroughly revamped to
enhance its sporting characteristics, and now develops 255bhp
(187kW) at 7,150rpm. With a maximum speed of 7,200rpm, this
engine loves being run at high speeds. It is, however, equally
comfortable at more normal speeds with a very flat torque curve and a
high maximum value of 300Nm at 4,650rpm.

The upper part of the engine, from the air intake to the combustion
chambers, is new. With an intake pressure loss of just 25mb, a level
rarely achieved on a production vehicle, cylinder filling is enhanced at
medium and high speeds:
•
New dedicated air filter with a volume of 11.5 litres (vs. 6.1 litres)
using an extra-high permeability filter cartridge.
•
Motorized throttle valve with a diameter of 74mm (40% gain in
passage section).
•
New plenum with integral trumpets and short, machined intake
ducts. The acoustic tuning of the assembly has been optimized for
high engine speeds
.
•
The camshaft uses settings which result in quicker and greater valve
lift. The variable inlet valve timing is carried over.
•
Valves, seats and machined intake pipes have been developed for
the new internal aerodynamics. New valve springs ensure optimum
control of lift.

The fuel supply system has been improved with a new twin-passage
injection ramp and injectors with a flow rate around 50% higher. The
engine management computer power has been increased and its new
calibration is notable for its finer control in transient conditions and
better control of response to the accelerator.

 

[tarmac terrorist]

cheers James, seems mostly confined to the inlet side of things, as suspected.

 

[hualpa_jo]

AFAIK the ph2 has also new cats to comply with the new Euro 4 emission standard.

 

[Fred]

i have a TWR phs2 inlet available if anyone wants it

 

[ColinG]

Did I imagine once reading that porsche played a part in the phase 2 engine??

 

[V6 2HOT]

Did I imagine once reading that porsche played a part in the phase 2 engine??

No its true.

 

[V6 2HOT]

"It is hard to make HP out of the L7X though. That's why Renault handed the engine to Porsche for the Clio V6 Ph2. Porsche re-worked the heads even further, and developed a whole new dual Plenum intake system. But even so, they only got 250bhp out of it."

 

[Spike]

"It is hard to make HP out of the L7X though. That's why Renault handed the engine to Porsche for the Clio V6 Ph2. Porsche re-worked the heads even further, and developed a whole new dual Plenum intake system. But even so, they only got 250bhp out of it."

Personally I don't think Porsche tried very hard, either that or a limited budget. Or maybe Porsche did develop this to a full 350hp but some turd at reno said that's too powerful and pulled the plug?
And yes, my glass is half empty. [smilie=icon_eek.gif]

 

[Brett]

"It is hard to make HP out of the L7X though. That's why Renault handed the engine to Porsche for the Clio V6 Ph2. Porsche re-worked the heads even further, and developed a whole new dual Plenum intake system. But even so, they only got 250bhp out of it."

Personally I don't think Porsche tried very hard, either that or a limited budget. Or maybe Porsche did develop this to a full 350hp but some turd at reno said that's too powerful and pulled the plug?
And yes, my glass is half empty. [smilie=icon_eek.gif]

This i agree with!