Originally Posted by Hawk Monster:
...two other questions in this discussion:
1. Speedster vs. Cabriolet
2. Engine size
I'd really like your thoughts on these issues.
Perhaps there is one other consideration that will influence your response to engine and size. I live at 7000' MSL so even short trips require large changes of altitude. This never seems to be an issue with my nore modern fuel injected/computer controlled cars but I always seem to loss performance if I do not adjust those double and triple carbs on the older cars especially when I get down to sea level.
Thanks again this has been a great discussion. I will certainly consider making it back East in May. Let me see what I can work out.
Joe
1- Depends on your comfort level. The speedster is more a wind in your hair, hearing the sounds and being in touch with the road and the car sort of thing. There are generally less creature comforts and some speedsters are more basic than others. Most speedsters will weigh 3-400lbs (If I'm way off base here someone please feel free to set me straight) less than a cabriolet, so a smaller powerplant (less than 2 liters) will be more fun in the lighter car. The Cabriolet, with it's rollup windows and 4-5 layer top is a more "civilized" motoring experience.
2- These cars originally came with about 75hp, and were peppy little beasts. A stock 1600, even with dual carburetors, is 10-15hp short, and basic, no frills transportation. It will get the car around, but that's it. If you want to enjoy the car to it's fullest, it needs more power; this is where it gets interesting.
The first upgrade I would consider is a 1915cc motor; almost all of the larger piston/cylinder assemblies require head and/or case machining, and this is the biggest bang for your buck in a stock (69mm) stroke motor. Set up with ported (stock valve) heads, Engle W110 cam and 1.25 rockers, enough carburetion to rev to a little under 6000rpm and compression set at 8 3/4 or 9:1 (will require premium fuel RELIGIOUSLY), this motor will produce somewhere around 100-105hp, require only regular maintenance, be reliable and get decent mileage (as long as you're not driving it like you stole it from the moment you get in 'till you shut it off).
The next step is a stroker motor. It doesn't matter what size it is (as long as it's over 2 liters, and yes, bigger is better), it definitely will be more fun! With some ported 40x35 heads, Engle W120/1.25 combo and proper carburetion and exhaust, the thing will produce 135-160hp, have a ton of bottom end/lower midrange (so it will still get great mileage on the highway), be easy to maintain, and did I mention it will be so much more fun???
You could take that 1915, use the big valve heads and cam it so it goes to 6500 or 7000rpm with power (and you will hit 140 or so hp), but now the lower rpms will be a "little soft" (not a lot of torque) and it will need more maintenance(new plugs and valve adjustments more often, heads will have to come off for new dual valve springs and possibly guides and seat regrinding at 10,000-15,000 miles it you like to wail on it regularly, and who doesn't?) to keep it running at it's peak (I once did this with a 1750 in a bug for a couple years) and now it's not the jump in and drive anywhere car it was. A bigger mild motor is way easier to take care of and drive than a high strung smaller motor.