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Ok I'll try and respond to everything at once isntead of 3-4 posts and quotes.
The idea is to get the car low, with the engine in the middle of the car, with tandem seating(to reduce frontal area), front wheel drive.
It could be a subaru engine except ideally I want all the crowns on the same side of the block. As I stated this is a future project for sometime when I don't have college loans, so consider expense less relevant than it normally is here.
The idea behind this topic is alot of time goes into engine design to figure out how to keep the exhaust as straight inline as possible. The less restrictions the air faces the less pressure needed to make it move(force,what I have to pay for, divided by area.) So obviously if I can create a system that has even fractionally lower pressure in the exhaust its worth it as far as stress on the engine and FE.
It doesn't need to be a 1.6 Honda but thats the only thing that I am very familiar with so thats whats in the model as far as proportions and heads. Something with more low end torque is always good. In a situation where custom trans can play you can make the gears about as tall as you like and more of them to avoid high rpms or lugging.
current model height is 45 inches with wheels and tires(4.5 inches shorter than my Del Sol) and 4 feet wide(a little over.)
The question is about the gains to be had from allowing very literally Straight Pipes from the exhaust directly out the top of the block with no twists or turns whatsoever.
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