Which motor for future turbo?, my first post. |
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Which motor for future turbo?, my first post. |
sgray944t |
Mar 31 2005, 09:53 PM
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#1
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Newbie Group: Members Posts: 19 Joined: 19-March 05 From: Raleigh, NC Member No.: 3,784 |
Well first I will introduce myself as this is my first post. I live in Raleigh, NC and have decided to build up a 914. My dad has lots of experience with Porsches of all types and suggested a 914 as a relatively simple and very fun car. I have been reading this site for a few weeks religously trying to learn everything I can. Im buying a 914 with the intent to swap a 911 motor in it. I am mainly interested in the 3.0 or 3.2 conversion, eventually to turbo. This is where my question comes into play. I have read Iamchappy's thread about turboing his 3.0 motor, and it seems like the 3 liter has no problems accepting boost. However I havent come across anything about turboing a 3.2. Is there any mechanical reason for this, or is it just something no one has documented? The reason I ask is that I am probably going to install the motor in its NA form first, then gather the parts for turbo over time. I think the higher hp of an NA 3.2 would hold me over until its time to turbo, however if turboing 3.2 motors is not ideal, and the 3.0 is a better forced induction motor, I would rather stick with it. My final goal is somewhere around 300hp give or take. At this point I'm thinking that the 3.0 is the better choice because its been turbocharged more often than the 3.2 and therefore I will have more support when problems arrive. Im also fairly sure the 3.0 can give me the power goals I'm looking for relatively easily. But please enlighten me, Im still learning about this 914 thing so I can use any comments you might have. Thanks alot guys!!!
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Cap'n Krusty |
Apr 4 2005, 06:17 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
We need to get some semantics dealt with here. An SC IS a 930 motor. The 911 Turbo motor is based on a 930 case, as is the 911SC, with different crank, rods, pistons and cylinders, cams, and a lot of other stuff.
If you want to put a basic 911 motor in a 914 chassis, especially a big motor, you will need to gather together parts which can (and usually do) cost as much as the motor. You'll need to reinforce the chassis as well. You can EASILY get into a car with a 911 engine swap to the tune of $12-15K (including the cost of a nice roller) without labor. A lot of us have done these, and most of us have been amazed at how quickly the nickel and dime stuff adds up. As others have said, you'll need to do the brakes, and the tranny may not be sufficient to handle the increased torque of a big motor. Putting a turbo into the equation might well double the costs. I've done a a conversion with a 2.7 RS style MFI motor and 79 turbo brakes, with 7s and 8s and SC rear flares. We're guesstimating 275 HP and the car was scary fast, without any of the heat and throttle lag problems of a turbo. By the time the car went from a 1.7 to a 2 litre, then a 2.4T, then the 2.7, including the body and paint, sound system, and interior, the guy had spent $40K. It was almost as fast as his SCCA GT2 car. My suggestion would be to find a car someone has already done (and done right) and drive it for a while. The Cap'n |