In the quest for more power, I am looking at some performance options I can install this winter. My first thoughts are cams and a mass air kit. What have you guys done to increase your hp? BTW, I have an aluminum flywheel, B&B exhaust, Steve Wong chip, K & N cone, and some internal work to increase longevity.

 

Do you have the full B&B, or just the muffler? If you don't have the headers, consider getting them from either B&B or GHL. I'm not sure if SSI has the right size for the 3.2, I know that for a while they only had ones that would properly fit on the 3.0, but you could explore that option. Another exhaust route is to get 993 heat exchangers and have the flanges flipped and a custom muffler setup added...it's a labor-intensive job, but it's another great option.

You could get a mild cam in there to bump the power a bit. You could also get the 98mm P/Cs to bump displacement to 3.4 liters and then have Steve reprogram the DME to take further advantage of it, maybe even have a mild street-port done on the heads and add beefier valve springs/ti retainers so you can rev it higher. It all depends on how much you want to spend.

EDIT: I mean bump displacement to 3.4 liters...just get confused b/c when you put the 98mm P/Cs on the 3.0, it bumps it to 3.2. Sorry about that.

 

HI Steve,

I installed B&B stainless steel headers(with heat exchangers) as well as a single chamber B&B stainless muffler with two 4" oval outlets about a year ago. I was astounded at the increase in throttle response and HP. For years I ran stock 3.2 headers/heat exchangers with a stainless steel test pipe and a single chamber stainless steel muffler with two 4" round outlets. This arrangement still had a crossover pipe so the system was restricted by the 2" crossover. That arrangement was better than the stock 3.2 configuration and gave me a little more HP because I had reduced backpressure. My new configuration with the all B&B stainless steel system opened up the exhaust about as much as possible without just running completely open track headers. The B&B exhaust has a resonance (reverberation) between 2000 and 2800 rpm, but after that it mellows out nicely. But it is loud at lower rpms. You won't be listening to your radio very much.

I also installed 10.3 to 1 compression Mahles pistons. This change along with the stage 3 cams probably gave me more HP than any of the other things I did. I had a guy tell me last week that he could see flames coming out of my pipes when I was winding down from a red line run in second gear!!!

Installing stage 2 or 3 cams will also help your HP. To complement this you should consider reworking your heads and valves and install double strength springs and titanium retainers. I also have an oversized intake manifold body and ported heads that allow more air into the intake manifolds. The valve ports are ground to 5 seats to maximize intake area and I have the valves set at zero lash. I also installed a K & N cone filter and got rid of the stock air box. I think this has reduced my low end torque a bit, but from 3000 rpm up to 7200 rpm it explodes. I also had a special chip burned so I could take advantage of the changes.

Lots of fun, lots of horse power, lots of money.

Denny

 

It sounds like we have very similar engine work. Mine is euro so it started life with a 10.3:1 compression ratio, when the engine was rebuilt the p/o installed Raceware head studs and rodbolts, the heads got Aasco race valve springs and Ti retainers, the rods were rebuilt, resized and weighed and the whole crank assembly was balanced as well.

I love the way my B&B sounds with the fabspeed cat-bypass and my heat exchangers aren’t in bad shape, so I hate the thought of spending big $$$ on a full B & B system if mine is in great shape.

I am going to do some research on the stage 2 or 3 cams, which brand did you go with?

After all of the work you have done, how does yours compare to a stock 930?

 

I had my cams sent to a Cali shop and they were reground to thier stage 3 config....after 13 years I can't remember who did the work. The stock 930 was running 280 HP and I know I'm running well over 325HP. My estimate is based from a G Tech meter I have in my car, not a real dino. I've never been taken by a 930 since my rebuild 13 years ago, but you don't see many 930's on the road today. I run the 60 in just over 4 seconds and surprise a lot of newer Vets and Porsches on both low and high end. The B&B headers, muffler and tips cost me about $3500 to get installed and took almost three weeks to complete. That was not a quick change. That's also when I had the car lowered while it was in the shop. It cost me about $25K to have all the work done 13 years ago, including the engine work, complete new suspension and new cross drilled brake rotors and SS brake lines. This engine has about 112K miles on it and it runs as good today as it did the day I took it off the shop floor 13 years ago.

 

325 hp in a 2645lbs car=
$25K 13yrs =

I guess at that point I should be thinking of a supercharged 3.6L.

 

Steve....I wouldn't spend that kind of money today on a 3.2. There are alot of other options out there to get HP for a lot less money. My shop says NO to a supercharger on my engine to gain more HP. I have looked at electronic timing and fuel injection, butit is also costly....another 10K and no gaurentees as to the HP gain....I'm done with this engine.

3.6 supercharged...HMMMMMMMMMMM

 

Food for thought: I wonder if you would be able to install a 930 motor into the narrow body Carerra, similar to the Ruf Yellow Bird, think of the HP you can get out of those motors.

Denny, I think you have successfully talked me out of doing any major work to mine, I’ll save my money and doing something wild to a 964 or 930 down the road

 

Steve...I hope I didn't rain on your parade....Denny

 

Didn't rain on my parade, it was more of march.

 

Steve....you have the bottom end pretty well built with your higher compression pistons, etc.. You ought to think about some top end work on the heads and valves. I don't think it would cost a lot for some higher end cams and valve work that would give you a good punch for your buck. I also think B & B headers would also give you a lot less back pressure than the stock headers. Ten K could get you a lot of fun.....

 

The more I put things on paper the more I realize it would be better to do nothing at this time and wait out for a 930 (the dream car).

 

"Food for thought: I wonder if you would be able to install a 930 motor into the narrow body Carerra, similar to the Ruf Yellow Bird, think of the HP you can get out of those motors. "

Yes you can sir, without much fanfare either. I installed a 930 engine in my 76 Carrera 3.0. (2350lbs wet) Get the engine, turbo oil tank(or modify the 911 tank like i did) second fuel pump, a couple of oil lines, and install. I put mine up to a euro 86 box w/ a kevlar clutch and an RSR ltd slip, Ruf turbo , headers, big intercooler, twin plug, etc. etc. Good for 450hp. It screams!

 

Hey Steve, what do you think? Is my logic making any sense? I just got a haltech system to get rid of the CIS and surpass the 500hp mark. That's what I love about the 930 engine, it's pretty easy to add big HP. I have a friend with a 73 RSR clone that installed a 3.6 993 engine. Car weighs almost exactly what mine does. After a few DE seasons he wanted to go crazy and turbocharged it! This car runs big slicks at the track and the car does hook up. He could lift the front wheels cresting the hill at Lime rock, although after it happened once or twice he would lift at the top of the hill.