Has anybody figured out how to do the Ninemeister head upgrade in the States yet?
11-10-2013, 08:23 PM
#31
Rennlist Member
This may be a very simplistic view, but I was under the impression utilizing a 964 head on a 993 would give similar benefits (how similar I'll let someone else chime in) as the 9m setup. Something about the compression chamber on the 964 being better designed.
Can anyone chime in?
Can anyone chime in?
11-10-2013, 09:12 PM
#32
This may be a very simplistic view, but I was under the impression utilizing a 964 head on a 993 would give similar benefits (how similar I'll let someone else chime in) as the 9m setup. Something about the compression chamber on the 964 being better designed.
Can anyone chime in?
Can anyone chime in?
11-10-2013, 09:20 PM
#33
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Several half truths there Kevin:
The 964 and 993 combustion chambers are identical.
The 964 port has a superior discharge coefficient (port flow per unit area) compared to the 993 head and with significant modification and larger valves it could be made to work pretty well.
However:
The 964 head will not fit the RH bank of a 993 engine due to the exhaust manifold flange bolt configuration.
The 9m billet head has (amongst other things):
Optimised intake & exhaust port profiles, better discharge coefficient, hence runs with higher port velocities and greater performance potential
A combustion chamber shaped to match the stock pistons for a more efficient burn control
Four bolt exhaust flanges
The package that other people refer to includes billet heads, valves, valve spring package, 9m Sport camshafts, 9m intake stacks (& modified Varioram manifold where appropriate), LWF, 100 cell cats and live ecu remap (55 pin only). Typical ROW 3.6 engines tested at 9m make around 345-350hp, 3.8 engines have made 360hp compared to stock VR engines at 300-310hp when remapped for 97+ Octane super unleaded.
The 964 and 993 combustion chambers are identical.
The 964 port has a superior discharge coefficient (port flow per unit area) compared to the 993 head and with significant modification and larger valves it could be made to work pretty well.
However:
The 964 head will not fit the RH bank of a 993 engine due to the exhaust manifold flange bolt configuration.
The 9m billet head has (amongst other things):
Optimised intake & exhaust port profiles, better discharge coefficient, hence runs with higher port velocities and greater performance potential
A combustion chamber shaped to match the stock pistons for a more efficient burn control
Four bolt exhaust flanges
The package that other people refer to includes billet heads, valves, valve spring package, 9m Sport camshafts, 9m intake stacks (& modified Varioram manifold where appropriate), LWF, 100 cell cats and live ecu remap (55 pin only). Typical ROW 3.6 engines tested at 9m make around 345-350hp, 3.8 engines have made 360hp compared to stock VR engines at 300-310hp when remapped for 97+ Octane super unleaded.
11-10-2013, 11:18 PM
#34
Rennlist Member
Several half truths there Kevin:
The 964 and 993 combustion chambers are identical.
The 964 port has a superior discharge coefficient (port flow per unit area) compared to the 993 head and with significant modification and larger valves it could be made to work pretty well.
However:
The 964 head will not fit the RH bank of a 993 engine due to the exhaust manifold flange bolt configuration.
The 9m billet head has (amongst other things):
Optimised intake & exhaust port profiles, better discharge coefficient, hence runs with higher port velocities and greater performance potential
A combustion chamber shaped to match the stock pistons for a more efficient burn control
Four bolt exhaust flanges
The package that other people refer to includes billet heads, valves, valve spring package, 9m Sport camshafts, 9m intake stacks (& modified Varioram manifold where appropriate), LWF, 100 cell cats and live ecu remap (55 pin only). Typical ROW 3.6 engines tested at 9m make around 345-350hp, 3.8 engines have made 360hp compared to stock VR engines at 300-310hp when remapped for 97+ Octane super unleaded.
The 964 and 993 combustion chambers are identical.
The 964 port has a superior discharge coefficient (port flow per unit area) compared to the 993 head and with significant modification and larger valves it could be made to work pretty well.
However:
The 964 head will not fit the RH bank of a 993 engine due to the exhaust manifold flange bolt configuration.
The 9m billet head has (amongst other things):
Optimised intake & exhaust port profiles, better discharge coefficient, hence runs with higher port velocities and greater performance potential
A combustion chamber shaped to match the stock pistons for a more efficient burn control
Four bolt exhaust flanges
The package that other people refer to includes billet heads, valves, valve spring package, 9m Sport camshafts, 9m intake stacks (& modified Varioram manifold where appropriate), LWF, 100 cell cats and live ecu remap (55 pin only). Typical ROW 3.6 engines tested at 9m make around 345-350hp, 3.8 engines have made 360hp compared to stock VR engines at 300-310hp when remapped for 97+ Octane super unleaded.
11-11-2013, 04:53 AM
#35
Racer
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The package that other people refer to includes billet heads, valves, valve spring package, 9m Sport camshafts, 9m intake stacks (& modified Varioram manifold where appropriate), LWF, 100 cell cats and live ecu remap (55 pin only). Typical ROW 3.6 engines tested at 9m make around 345-350hp, 3.8 engines have made 360hp compared to stock VR engines at 300-310hp when remapped for 97+ Octane super unleaded.
01-19-2015, 10:14 PM
#36
Rennlist Member
12-14-2016, 09:21 PM
#40
Rennlist Member
Not officially, I've communicated with Colin as I'm planning to build out my RS tribute with the nvr stage 3 pkg (hopefully soon) You can order the kit from him, however the trick is the ecu. I have a 95 55 pin, it can be sent to him and flashed. The issue becomes the 96+ OBD II 88 pin cars which he cannot flash so you would need to get motec, etc. NP993 in this thread has successfully done the 9m package in the US and has been a wealth of information around it
12-16-2016, 12:35 PM
#41
Three Wheelin'
I'm still saving up... I have a running joke with my friends; anytime we take a business risk that could result in a nice little income boost; we always say that it will go to a pair of 9M heads...
