In regard to an x pipe, what is the most and least angle you can go with? I mean how steep an angle can you go? Whats the least amount of angle you can get away with (obviously you don't want a "t" pipe.
Thoughts?

 

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I believe they should cross at approx 45*.(example 1) The reason for them is scavenging. The low angle you show flows all f'd up. The flow should cross,not merge. Done properly,it will create a low pressure in the adjoining pipe and help pull the next firing cylinder's pulse out.

 

Interesting topic.... I was told by some that it doesnt matter, that its mainly to balance backpressure from one bank to the other. subscribing

 

just put some stacks on it lol

 

At the rate I'm going I might just do that I'm thinking crazy front engine X dumped in front of the front wheels. Gonna have to wear earmuffs!
Both of those pics are Corvette engines, I wonder how loud those suckers are?

 

if you dont think they matter ask a nascar team what they think, there is a science to truly tuning an x-pipe...different angles, crossover shape, length, cross-sectional area all matter as far as sound and horsepower go....will we ever see the difference in our cars?...nahhh...but they do make a difference