Sizing Exhaust Pipe

[frankr]

Need input on sizing the exhaust on my 34 Dodge.
It has an early 392 hemi, stainless steel valves, headers, 2 x 4 barrel Weiand intake with 600cfm Edelbrock carbs, 10.5 to 1 pistons overrsized 0.040, semi wild cam.
I was about to run a dual exhaust at 2 1/2 inch but a few locals told me I should go to 3 inch minimum.
Is 3" pipe too large?
Best mufflers for this?

FrankR
1934 Dodge 392 Hemi

 

[dmw56]

I think 2.5" is just fine. Mufflers? Depends how loud you want it. What are your local laws like? Believe me you will get tired of loud if you drive it any distance. If you have the room some large "Turbo" type mufflers or good.

 

[cantwell.colton]

i say no mufflers
run an x over or cross pipe and 2.5 all the way back

 

[26Troadster]

alot of people like the x pipe or the cross over, i myself don't like the sound it makes, so i run reg dauls. depends on what mufflers you plan to run, if you want something like smittys they come in 2". for street i like 2 1/4", but if i got a high rever i go larger. if you want to make a lot of noise the 2" to 2 1/4" is the way to go, if you want a deep tone the 2 1/2" and bigger. smaller pipes will give you more bottom end, but choke you down at higher r's.

 

[cantwell.colton]

the cross over is just for the backpressure -- but you could always run some glass packs - i have 2 - 14in? maybe 20 in im not sure sitting in my garage.
lol
http://cgi.ebay.com/ebaymotors/TWO-...r_Truck_Parts_Accessories&hash=item53e3568c3b
got them from this guy... bought from him before and i was pleased with everything about them and the seller.