What Engine For the America GS?
#1
What Engine For the America GS?
As we begin the R&D for what was to be a normally aspirated 4.0 liter engine, the question is should we go to a smaller displacement turbo instead?
#4
Technical Guru
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#6
Addict
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I'm with demonfish. 3.6L, 9.0/1 compression, 2-gt28rs turbos, conversion to mass air. And you may want to start with 993 h/e's.
I have the complete plan, just not the funds to execute.
I have the complete plan, just not the funds to execute.
#7
In order of preference;
NA
centrifugal supercharger
turbo
turbo solutions always seem to run up against how efficient the intercooler is. For an equal hp level NA always seems to be the more elegant solution.
NA
centrifugal supercharger
turbo
turbo solutions always seem to run up against how efficient the intercooler is. For an equal hp level NA always seems to be the more elegant solution.
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#8
Three Wheelin'
#9
Nordschleife Master
Given your quest for lightness, I would stick with a large displacement N/A engine like you originally planned. The turbo components add about 100lbs to the car in the wrong location. Having had both, I much prefer a non turbo car for real world driving and I'd wonder how well the Tip trans would do with a turbo engine. Just my $.02.
#12
Rennlist Member
Lots of people have smaller displacement air-cooled Turbos - there are only a few air-cooled 4.0 Liter 911s out there and none factory built.
Not to mention the throttle response and light weight of the N/A engine is hard to beat.
Not to mention the throttle response and light weight of the N/A engine is hard to beat.
#13
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I always prefer a NA motor to a turbo or SC'd one. They sound better to me and I prefer their driving dynamics.
#14
but unless you are able to come up with a better intercooling solution than the Secan you have hit a celing at which no more power is readily available.
No doubt the turbo installation can be made lighter than 100kg though.
No doubt the turbo installation can be made lighter than 100kg though.