Engine Upgrade on 3.0 SC

[yasir72]

I am a newbie and need some opinion. Wayne, could you help me this.
I am interested to upgrade my 1982 911 sc ferry porsche edition (euro version 204hp) to either 3.2 or 3.4 can you advise me what other parts required for the upgrade and the price quotation? I am interested in Mahle P&C and will be using my existing CIS. Idrive my car daily. Is the RSR type piston good for every day drive or should i stick to max moritz? I live in Malaysia where 97 fuel octane is supplied as standard. Does that mean i can run on higher comprression without twin plugging?

Advise is very much appreciated.

[rdane]

Do a search under my screen name and/or 3.4. I just finished a 3.4 CIS car and am extremely happy with the end results.

[Wayne 962]

The RSR pistons are a poor choice, unless you are swapping the cams and fuel injection. The Mahle 3.4 CIS kit is a good upgrade, and the only other mods you will probably have to do is to richen up the fuel mixture on your CIS...

-Wayne

[KobaltBlau]

Most people in your situation would go to max moritz 3.2. 3.4 requires a crank and rods from turbo 3.3 or carrera 3.2 (74.4 stroke instead of 70.4)

[yasir72]

since my car is euro spec 1982 with 204hp running on 9.8:1 compression, would the max moritz kit running on the same compression have noticeable power incrrease?

[rdane]

You would get a noticeable low end torque increase with the 98s. 3.4 will be more than the 3.2. But Bruce Anderson thought the 3.2 bumped you up to 225 just by the addition of the 98s over the standard SC engine.

I haven't seen anyone dissappointed who has done either conversion.

This is another recent thread. But there are several more worth looking at.

What do I need to build a 3.4 from a 3.0?

[yasir72]

Anybody here has tried the RUF SCR 3.2 conversion kit? Got an e-mail from RUF Germany. Here are the specs:

Engine conversion kit RUF SCR

3,2 Liter, 215 PS

The SC engine is enlarged to 3,185 cm³ with a peak power

of 215 bhp at 6,000 rpm.

Consisting of:

piston/cylinder and a special muffler

Power Output (DIN) 158 kW (215 bhp) at 6.000 rpm

Specific Output 49,6 kW/L (67,5 bhp/L)

Displacement 3.185 cm3

Compression Ratio 9.8 : 1

Maximum Torque 275 Nm at 4.500 rpm

911 Carrera 3,0/ SC

Cost 4100.- Euro

Would like to hear feedback from anybody that have tried this kit & comparison between max moritz

[rdane]

Pretty much what you would expect from a set a 98 p&Cs with a 2/2 muffler. RUF or Max Moritz, either way I bet they are the same made by Mahle and the same wedge design.

Ruf's 215 is closer to what we have seen on Pelcan than the 225, BA mentions.

[turbo6bar]

So a stock 3.0L with a set of 3.2 Max Moritz p/c will jump from 180HP to 215HP, generally? jurgen

[rdane]

yes..

[Wayne 962]

Originally posted by turbo6bar
So a stock 3.0L with a set of 3.2 Max Moritz p/c will jump from 180HP to 215HP, generally? jurgen

180 is a pseudo-number. The engines typically have 10-15% more HP than the listed 180 number. So it would be more like 195 to 215.

-Wayne

[rdane]

Originally posted by turbo6bar
So a stock 3.0L with a set of 3.2 Max Moritz p/c will jump from 180HP to 215HP, generally? jurgen

Just to clarify a bit more. Like Wayne mentions 180 was base from the factory at the crank.

I have over a dozen stock SC numbers from all the years. They average between 160 and 173 @ the wheels and mid 160s seems to the average. 195 @ the crank will generally be very close for a stock car.

3.0 to 3.2 cc adds a 6.4% gain displacement =207 crank

8.5:1 compression to 9.8:1 compression should add an additional @ 5hp per ½ point . So the net result depends on what you started with if you are adding 9.8 P&Cs. Could be as much as 13hp. Makes the end result of 98mm P&Cs, 9.8:1 compression right at 220hp at the crank. Add exhaust and a good muffler and 225 should be easy enough.

I ended up with a good bit more than I bargained on my Max Moritz set.