| Author | Message | ||
| allan fiedler (Allanlambo)
Intermediate Member Username: Allanlambo Post Number: 1576 Registered: 6-2002 |
I would buy a 911Sc- 78-83. Run forever! | ||
| Ralph Koslin (Ralfabco)
Intermediate Member Username: Ralfabco Post Number: 1050 Registered: 3-2002 |
P-cars will last forever !!! Just rebuild it. 911's are awesome !!! | ||
| Andrew-Phillip Goalen (Andrewg)
Member Username: Andrewg Post Number: 502 Registered: 9-2002 |
Agree with everybody else, if you can get the car for 5k or less you could justify putting a 3.2 or even a 964 3.6 engine in it!, transmissions seem to last well beyond 200k but only if they havent been really abused (and havent had regular oil changes!) | ||
| Augustine Staino (Azzuro328)
Member Username: Azzuro328 Post Number: 719 Registered: 4-2003 |
Nebula, This car has one of the least powerful and notoriously troublesome engines that the 911 ever had. Porsche fitted the 911 with a 2.7 liter motor for the U.S. from '74 through '77 and they were strangled by emissions requirements. I think they had 150 HP at most. They are known to leak a lot and they can be tricky to maintain. If you are serious about this car, I think that $5k or less is where you want to be because you have a lot of $$ work to do. I agree with Will. If you can find a '78 or newer SC you will be getting a much superior car. And for $8,500 you should be able to find one. Just make sure it has had the chain tensioner upgrade! Good luck!  | ||
| Will 575 (Willh)
Member Username: Willh Post Number: 382 Registered: 3-2003 |
Here we go, from rennsportsystems.com: Porsche introduced the 2.7 litre engines in 1973 with the Carrera RS 2.7 that never was officially imported into North America. The first and only versions we received in North America were the K-Jetronic-equipped (CIS) units due to increasingly stricter emissions regulations. This precluded using the excellent Bosch MFI system from the RS engines. The 1974 2.7's had no add-on emission equipment and used the early style 3-into-1 heat exchangers that gave these engines more power and lower operating temperatures than the later ones. The various 2.7 litre powerplants used in 75-76-77 were equipped with air pumps and later, thermal reactors that reduced engine life to less than half of the 74 2.7's. Almost all of these engines require extensive machine work to make them durable & reliable. The magnesium engine cases used in the 2.7 were also subject to pulled head studs and main bearing bore distortion from excess heat. Cylinder heads warped and valve guides needed replacement within 50K miles. These 7R-series cases need very careful inspection by a competent machinist to determine the feasibility of reusing or replacement with a better one. Using a 7R case from a 2.4 litre engine may be preferable due to its less heat stress. The early-style 7R case found in the 2.4 litre engines must be machined to accept 90mm 2.7 litre cylinders. 1976 saw a change in the oil bypass system in the 7R case that should be incorporated into any rebuild of these engines. Replacing the oil bypass pistons and springs along with a case modification allows the use of the larger oil pumps from SC and Carrera engines. The largest oil pumps; Turbo and 964, require machine work to make room but these are the best pumps that Porsche used. Turbo pumps are aluminum instead of the magnesium used in the 3.6 pumps and these maintain better oil pressure when hot due to less thermal expansion. | ||
| Will 575 (Willh)
Member Username: Willh Post Number: 381 Registered: 3-2003 |
The 1974-77 2.7 liter engine was a bit notorious. If you aren't already aware of the problem - I can't give you a useful explanation beyond the heads up - I'd suggest asking the question on rennlist.com or pelicanparts.com. All the advice I've read about Porsches is "buy the most recent model you can afford." I am a BIG fan of the late 70s early 80s 911 SC models, they seemed to have had pretty bulletproof engines. Good luck, they are wonderful cars. Cheers, Will | ||
| Nibblesworth (Nebulaclass)
Member Username: Nebulaclass Post Number: 849 Registered: 11-2002 |
There is a 1975 911 S Porsche that I am interested in. It has 170,000 miles on the clock. The seller says it runs well, but has minor leaks. THe question is, how long will a 911 motor of this vintage last? If 170,000 is near the end of its life cycle, what does a rebuild cost for this type of engine, and what about a tranny fix? The guy is asking $8500 for it. Thanks! |