Eric Bowman

I've read the original HP and torque specs online and the 911 engine looks more expensive but not much better.

What about after some standard upgrades? Can you get a lot more out of the 911 engine to justify the cost?

I'm building a car for a race class that limits to 2.0L and I'm trying to decide what engine I should run.

Matt Romanowski

If you want the most out of a 2 liter, the 901 Shop in FL. is getting something like 240 HP out of a 2 liter 6 cylinder car. I'm not sure what Dawe's can do with a 2 liter, but I'm sure they can make a bunch of power as well. You can do similar in a 4 cylinder car, but it's more work and shorter lived.

Neither option is cheap!

Petevb

I have not heard of anyone getting 240 hp out of a normally aspirated 2.0 Type IV as a practical race motor?

The 911 motor will be significantly heavier.

NaroEscape

It's a trade off...with the 4, you get lighter and less mods needed to the car itself (like remote oil tank, engine mounts, engine tins, etc) and its much cheaper to build. But, the 6 will allow you more options to make more hp (read $$$) and be a bit more durable. But again, you need to factor in the weight component when talking power. I've seen many lightning fast 2.0/4 cars optimizing power to weight.

But if you decide to go to a 6, I have a nice 914/6 case and crank I need to sell :-)

Matt Romanowski

The difference is only like 50 lbs or something. Not really significant when you run open rules as you can get it out somewhere else.

As to the motors, the F Production guys (Chris at Tangerine Racing) are getting north of 170 hp with 1.7 liter motors. There would be a bunch more if you went to a 2 liter. The thing is when you get to those motors, no one will tell you exactly how much they have.

69gaugeman

I'm not so sure of that. With the remote oil tank, lines, and oil along with just the engine itself, I can't believe the difference is only 50lbs.

Even if it is only 50 pounds you can't take that out anywhere else that you couldn't with a 4 cylinder.

The parts for the type IV are WAY cheaper.......

If you are limited to 2.0l I would stay with the type IV.

Rotten Robby

I just sold my Raby Kit 2432 motor which dyno'd at 224/207. It was just too high strung for what I want to do with the car. I am putting a 3.2 Carrera motor in its place. More weight and roughly the same HP but I can drive it across the country without any worries.
I'd say the weight difference is closer to 150# with all the extra oil and cooler lines and tank.

Steam Driver

Another thing to consider is that the weight of the six is carried somewhat higher in the car. So in addition to the power-to-weight penalty (for the total car) there is also a C.G. issue. "Back in the day" I have extensive experience autocrossing both a four and a six and you can definitely feel the difference in balance. I always thought that if the horsepower was equal the four would be the better handling car hands down.

Matt Romanowski

How do you figure the weight is higher?

Steam Driver

Engine is taller and "thicker" than the four. Carbs are taller and far heavier than the f.i. of the four. Oil tank reaches high up into the fender, not present at all on the four.

I'm not the only one that thinks this. Bob Hindson, who campaigned both the P+A CP 914-6 in the midwest and also his own EP 914-4 was in agreement with this.