Difference between 911/93 & 911/93 engines
09-19-2006, 11:48 PM
#1
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Difference between 911/93 & 911/93 engines
What are the main differences between 911/83 & 911/93 engines? If my ustanding is correct, 911/83 are RS engines?
Is it possible to to convert a 911/93 engine to an RS spec'd engine and if so, what are needs to be done for the conversion?
And lastly, how reliable is an RS engine (as compared to 911/93 engine)
Thanks for your help
Is it possible to to convert a 911/93 engine to an RS spec'd engine and if so, what are needs to be done for the conversion?
And lastly, how reliable is an RS engine (as compared to 911/93 engine)
Thanks for your help
09-20-2006, 01:40 AM
#2
RL Technical Advisor
Hi:
The 911/83 engine is the 2.7 RS MFI-equipped, 210 HP motor found in the '73 RS and Euro '74 Carrera's. Some '75 Euro Carrera's had this engine, too.
The 911/93 engine is the 2.7 CIS-injected, 175 HP (DIN) motor found in US '74 911A & Carrera's.
Its possible to convert one to another, but its NOT cheap anymore. You'd need a complete late MFI system, machine work on the heads, different cams, some sheet metal and a host of small details.
These engines are quite reliable as long as oil temperatures are VERY carefully controlled.
The 911/83 engine is the 2.7 RS MFI-equipped, 210 HP motor found in the '73 RS and Euro '74 Carrera's. Some '75 Euro Carrera's had this engine, too.
The 911/93 engine is the 2.7 CIS-injected, 175 HP (DIN) motor found in US '74 911A & Carrera's.
Its possible to convert one to another, but its NOT cheap anymore. You'd need a complete late MFI system, machine work on the heads, different cams, some sheet metal and a host of small details.
These engines are quite reliable as long as oil temperatures are VERY carefully controlled.
09-20-2006, 05:09 AM
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steve
thanks for your quick reply.
when you say oil temp has to be VERY carefully controlled, what do you mean by that? btw, i live in a very hot and humid climate (365days of 90degrees + 90% humidity). what should one do to control the temp? extra oil cooler?
what about the reliability of a 911/93 engine assuming it's fully rebuilt
thanks
thanks for your quick reply.
when you say oil temp has to be VERY carefully controlled, what do you mean by that? btw, i live in a very hot and humid climate (365days of 90degrees + 90% humidity). what should one do to control the temp? extra oil cooler?
what about the reliability of a 911/93 engine assuming it's fully rebuilt
thanks
09-20-2006, 11:22 AM
#4
RL Technical Advisor
My pleasure,...
Given your climate, you will need a big oil cooler in the front fender with a fan and lots of air ducting. If you keep a mag-cased engines' oil temps under 200 deg F, these last a LONG time. I use either the factory cooler setup (Carrera 3.2) and make sure that air can reac hthe cooler from the front of the car; something thats usually overlooked.
IF,..............IF,..a 911/93 motor is rebuilt correctly and low oil temps are maintained, these are quite durable. The key is preparation and assembly.
Given your climate, you will need a big oil cooler in the front fender with a fan and lots of air ducting. If you keep a mag-cased engines' oil temps under 200 deg F, these last a LONG time. I use either the factory cooler setup (Carrera 3.2) and make sure that air can reac hthe cooler from the front of the car; something thats usually overlooked.
IF,..............IF,..a 911/93 motor is rebuilt correctly and low oil temps are maintained, these are quite durable. The key is preparation and assembly.
