high flow mufflers

I run a single Donaldson M100463(3200 cfm) on an MXS 550 with a tweaked BD tune and it works just fine. 850-875 max egt.
the 463 is a standard size muffler and i believe the muffler on a 387 is longer than standard. you may need a longer stack.

 

https://dynamic.donaldson.com/webc/WebStore/search/item_detail.html?section=10210&item=21897

Exhaust gas CFM for a MXS 475 Hp at 2100 RPM is 3404.34 CFM

 

good info...

do most folks in class 8's use pre or post turbo pyrometers? im going to mount one along with a boost gauge and wondering what the standard is

i always mounted them pre turbo in my pickup trucks(cummins and powerstrokes) and never take them past 1250* for long

 

look how much better they flow than the typical m100465 (most fleets run these cause they the cheapest) on the low and medium rating


huge difference

https://dynamic.donaldson.com/webc/WebStore/search/item_detail.html?section=10210&item=21887

 

Post turbo is the industry standard for Class 8 trucks. The reason for this is the long hours of operation and use. Nobody wants a probe failure destroying a turbo.

 

whats acceptable post turbo? 1000*?

 

1050* F is acceptable for a long pull. I've seen 1150-1250 for short bursts in my own truck

 

thanks for the info

so if you stay under 1000 post turbo your good to go

 

yes this would be in the safe range for a post turbo probe installation

 

walkers 22 964 is a 9 inch round

walker 22 963 is a 10 inch round

walker 22 980 is a 10 inch round for quieter jake brake