[4-1-1 exhaust vs 4 individual pipes]

On 6/9/2019 at 12:26 PM, markfoggy said:

 

Ok, thanks.   DO you mean, i can lost some power if i build 4 single long pipes? with a diameter as standart collector (about 4sm), without megaphones.    partly from alu, that dont increase the weight more then little bit.

What you think, how will change the character of engine if i just switch stock exhaust onto my own design?

 

[4-1-1 exhaust vs 4 individual pipes]

And i know about that -4-2-1 is better for whole range , and 4-1-1 gets bonus only at high revs but still something in a middle...... and i like low\middle range on 750carb. Specially when screws sets on minus 3.5-4...

[4-1-1 exhaust vs 4 individual pipes]

Hi , Fellas! I have SRAD750carb.  Exhaust is stock 4\2\1 + empty end.  I think about two ideas.

1. Delete connecting pipe  between 2&3 pipes....As i know its mission is delete some range of noise for free(without extra weight an exhaust).

But i am sure this is not for free  about the power.   

2. SOmetimes .. i want to produce new exhaust collector . 4 individual pipes without mixing .  and 4 tiny long alu pipes instead the one.

In a book about 4stroke nascar\drag cars authors say-  they get  best result with 4-1-1. even bigger than 1short pipe per 1cyl.  Why 4-1-1 is better than system where any cyl works as individual machine. one carb, one exhaust.