2H Turbo Exhaust 2.5-3.0 inch???

[86HJ]

Putting a new exhaust on my 2h turbo cruiser.
Questions
What size of exhaust is best the 2.5 or 3 inch.
I was thinking of a dynomax muffler high flow? Any good?? Not into the straight pipe farm tractor sound. Some say 3 inch is to much and loose torque? So I was told to run a 2.5 to the muffler and a 3.0 inch from the muffler on. If anyone has done any exhaust upgrades please reply and let me know what is best.
Thanks very much...

 

[brownbear]

2.5 all the way with the original routing. No need for the muffler. It will be not too loud. My 3b with 2.5 and no turbo is fine.

 

[bc81]

2.5 is enough to get the job done, make sure you are using mandrel bent piping. crush bent tubes flow less efficiently. your call on the muffler though. you don't have air scare like on the mainland. i would run a flow through style muffler. you can look right thru them but they have packing on the outside diameter for some sound reduction. the turbo restricts most of the exhaust noise. magna flow make some good diesel mufflers and can be bought at lordco. it sounded great on my 12ht just before we sold it to get our 80.

 

[Clint79]

i would say 3" all the way ,no mufflers .. relax and listen to the turbo whistle

 

[arnott1t]

I run 3" with mandrel bends. Sounds great.

 

[Tapage]

I'm running 2.5 traight all the way .. and sound nice .. but my 3" in my 80 sounds killer ..

 

[86HJ]

What I plan to do this weekend is a 3inch from turbo back with a dynomax high flow diesel muffler than twin 2.5 pipes out each corner. Will post some pics after the weekend.
Thanks for the input.

 

[AussieHJCruza]

3 inch with no muffler following the stock route...nice whistle and a growl, but with the stock routing, not odious.

 

[Gun Runner 5]

2H + Garrett Turbo ....... 2-1/2" exhaust, original routing with a muffler. There is a nice "turbo whistle" without the noise.

 

[gerg]

All diameter pipes work, but 3 inch will have inherently less back pressure all thing equal. If you can easily fit it I'd go 3 inch, but more importantly is your transitions from turbo outiet diameter to piping and bends, or how well your joints line up. Better to run a smaller diameter and do a quality job than a larger with bad transitions as you can easily take steps backwards. Most folks boast pipe diameter. But you never hear about how many degrees of bends are in a system, or how their joints are seamless. That's where the low hanging fruit is for backpressure.