Fact finding - - Engine Spec's - - HP/torque, What HP/torque can be expected for a given engine size??? Options

[nine14_6]

I have never driven a 914 but have always wanted one. I will be making a purchase in the next 5-8 months. I am trying to get a feel for how much power/torque a 914 might have in relation to what I have now. I am currently driving a BMW 328 (190hp) and am getting about 16 +/- pounds per HP with torque peak around 3-4K rpm.

My question is: For a given motor what could be expected. I guess that a 1.7 puts out about 70hp(31/lb), 1.8 - 80-85hp (27/lb), 2 - 95-100hp (22/lb). I am interested in the 6 conversions. What is typical or conservative for a 2.2, 2.4,2.7, 3 or even a 3.2 6 cyl? If I figure a 914 weights in at 2200lb, I am thinking I will need 150hp to get at least a similar weight to hp advantage.

Also, about how fast can be achieved per gear relative to these cars?
One more question... in the 6 conversions, what it could be expected in 0-60 times? (IMG:style_emoticons/default/driving.gif)

[byndbad914]

My question is: For a given motor what could be expected. I guess that a 1.7 puts out about 70hp(31/lb), 1.8 - 80-85hp (27/lb), 2 - 95-100hp (22/lb). I am interested in the 6 conversions. What is typical or conservative for a 2.2, 2.4,2.7, 3 or even a 3.2 6 cyl? If I figure a 914 weights in at 2200lb, I am thinking I will need 150hp to get at least a similar weight to hp advantage.

So this gets to be a pretty "loaded" question.

A few ways to look at it (same HP, stress to components, weight).

1. same HP = say you wanted 200HP, and it is a mostly street driven car so longevity and low stress is more desirable than less weight. You can build a 2.0L 4-cyl that makes that or a 3.2L 6 that makes that. The difference is that the 4 cyl has to generate 1.67HP/cube and the 3.2L only needs to produce 1.042HP/cube. So the 3.2L will be a very, very low stressed engine, with HP/cube numbers like that it will make more torque across a larger band than the 4cyl and just be an all around better street combo.

2. Lower stress = say you took a 2.0L-4 and compared to a 2.0L-6 (same exact volume engine) and they make the exact same HP and torque peak values. There is less stress on the 6cyl engine as six cylinders share the load to create the output v. four cylinders sharing the load to create the output.

3. weight - if you want to race it and be the fast guy, and set the HP the same, then build the high-strung 4 as it is clearly a smaller package, even if volume is the same. so you will have the lighter more nimble car.

Typically for the street crowd, the broader torque band and higher output values in general from the larger cube late-model sixes will persuade them to go conversion. The guys that want to race in a small bore category will prefer the 4 as they can get the same output as many of the small sixes, or at least close, but be competitive based on weight difference.

But keep in mind example one where the 4 cyl is making 1.67HP/cube. Take the 3.2L and make 1.67HP/cube and you will make 320HP instead of 200HP. Then you get into transaxle issues (IMG:style_emoticons/default/smile.gif)