Exhaust question

[Optikalillushun]

My 88 currently has true 2 1/4" dual exhaust with short, burned out glass packs. i would like to know if adding a cross over would help performance and mpg any. i know in gasoline engines they help dramatically due to scavanging so i assume it would do the same for the erl burner. if i do, i would probaly elimate the 'packs and place the cross over in thier place. if i do this i was thinking a simple H pipe, or would an X be better. i was going with the H because they are supposed to be better for lower end power.

when (if, with the way things are going) i go turbo it'll be a whole new system. just trying to make due with what i have.

 

[Optikalillushun]

TTT...

 

[IDIeselman]

I'd say it would help some and am certain it takes away the cackle and quiets these motors alot. I have 3" duals on my truck and later added the H just behind theT-case and what a difference.

 

[IDIeselman]

like this.

 

[Michael Fowler]

Somewhere along the way, I picked up the information that the more pulses a muffler has to handle, the easier it is to be quiet. Thats why those B&S one cylinder lawn mowers are so relatively noisy.
With that as a given, I can see that the crossover pipe would quiet things done a bit.

 

[Agnem]

I wouldn't have guessed it would help much, but if Tim has done it, then there is your proof.