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Building the ultimate 3.5l motor
I am in the process of getting my thoughts in line for a 3.5 l motor build. My 3.2 comes early next year, and want to start sourcing parts. My base ideas as follows:
3.2l motor - case boat tailed
100 mm sleeves
JE pistons - flat top
Keep 3.2 heads basically standard
ITB with with high butterfly injection - 45mm
Crank trigger ignition - twin spark - with individual coils
There are a few points that need to be added here.
The vehicle will spend most of its time at 6000 feet above see level, but will also need to run at sea level.
We will use 98 octane fuel
Car is a dedicated track car.
I need some ideas on compression ratio, was thinking about 12:1, ideas on camshaft selection - like the characteristics of the 993 super cup cams.
The reason for the engine change, is that I currently run a monster 3.2l SS, with super cup cams, and ITB. This motor makes good HP but has peak torque at about 5500 rpm and peak HP at 6700 rpm. I compete against 993 super cups and 964 RS cup cars, and battle out of a corner. I would like to get more go low down.
Ideally I would like to have a motor that has peak torque at about 4500 to 5200 and peak HP at about 6000 rpm. This would allow a motor that is tractable.
The car will eventually be 2200 lbs.
Thanks for the input.
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