Hey Jake what do you have for us on the MPG engine Options

[LarryR]

I would really like to know what you have for 914 in the way of a hi mpg, respectable performance package.

I figure the 914 should be able to kick out 40+ mpg and get a 0 - 60 time in under 7 seconds.

The new tdi jetta coming available in July will go 0 - 60 in 6.9 seconds and get 41 mpg in the city and 53 on the highway. However id does weigh 3300 pounds. I figure the 914 should be able to smoke that with the 1300 pound weight advantage.

I am really looking forward to seeing what you have come up with Jake.

trying not to hi jack the emissions thread but keep it on 914 world (IMG:style_emoticons/default/beerchug.gif)

BTW you said you need 10 or 12 additional people. I would be # 2 ... I would gladly buy a super efficient 914 engine as opposed to buying a tdi jetta. (IMG:style_emoticons/default/beer.gif)

[Todd Enlund]

78 x 90mm is a great combo. The valves are only shrouded if the valves are to big for a mileage engine. Short strokes with large bores are great for racing and any high speed engine. Long strokes and small bores are great for low speed torque engines. They, by nature, require less induction. The smaller quench area of the bore means better thermal characteristics. Stay with a rod ratio around around 1.7 for even better mixture motion during quench. This combo is not nearly as easy to build as a 1911, and cost more, but would make a great DD. And if money is really no object, add a second set of spark plugs. On that tiny bore it would up the mileage even more. I believe 50MPG is realistic.

What does " the valves are shrouded " mean?

what does " keep the rod ratio around 1.7 mean?

how would this combo perform with the stock 1.7 heads and a 9550 cam? (IMG:style_emoticons/default/idea.gif)

Shrouded valves means that the valve is close enough to the cylinder wall that the cylinder wall actually obstructs the flow.

Rod ratio is the ratio of the stroke to the rod length... rod length/stroke=rod ratio.

I can't answer the last one :-)