Ive come to notice



paired 1/4 and 2/3



paired 1/2 and 3/4



paired 1/3 and 2/4

does cylinder pairing just not matter?

 

hmmmmm

 

there are different theories about it. some say having 1-2 & 3-4 together helps with scavenging and there more energy at the same time.

others say (and i concur) have 1-4 & 2-3 paired and you have an even distribution of exhaust gasses and steady flow.

for some reason both seem to do well in different apps

 

it doesnt matter much on a tri-y

scavenging is much better on a 4-1 so it makes a big difference there

 

Sequential versus Non-sequential cylinder pairing.

Pretty informative thread to read here!

 

excellent

 

Great read!

 

Awesome read. I'll be honest though...a lot of that went straight over my head. Lol

 

http://www.mediafire.com/?1vbbmqrcj4ow678

Go dl that, and unzip it.. grab a beer, and read.

Pairing does matter.

 

Excellent read, Im glad Delaney exposed the back pressure myth. It never made sense when I was told an engine should be thought of as an air pump, you want to get air in/ out as fast as possible, then in the next breath I'd hear " you need back pressure for mid range"

 

its one thing to read **** on the internet and another thing to actually build **** and test it in the real world for yourself. not to mention every motor and application is different.

you dont see anyone fast in our sport running a tri-y for a reason...they are good for street cars. it is impossible to get primary length in a tri-y short enough for top end power applications simply because of its physical size.

also either way you pair the primarys in a tri-y will yeild very similar results for 99% of people on here.

cylinder pairing is MUCH more important in a 4-1 merge collector because you can create much more scavenging effect when you have all 4 cylinders exhaust firing in a rotational order inside of the collcetor.

there are several great reads from several sources about exhaust theory and r&d results just as there are for everything else in the world. no two are the same that i have ever seen, just like anything you read or hear. that is why i started doing my own r&d to find out what actually works for myself...

for the most part i agree w/ the stuff in there, but i have disproven alot of it aswell. unless your doing your own r&d, take everything you learn w/ a grain of salt

 

any more good reads for those of us that dont have the resources to do our own R&d...