on a true dual setup, how much power difference is there? would i make more with an X or without?

 

You'll do alot better w/ an X-Pipe....you won't loose as much low end torque.

Go w/ an X-Pipe instead of not having one or using an H-Pipe

 

Are you asking is it better than an H-pipe or do you mean making true duals with no crossover pipe whatsoever?

My choice is for an X over the H but that is mainly for sound reasons. Generally speaking the X-pipe is quieter than ther H-pipe. HP wise there is not a huge difference in all the testing I have seen.

You need to run 1 or the other though.

 

why cant i run no crossover? The GTO doesnt have a crossover (theres a pipe there but its closed from the factory) and it seems to run fine.

If im only going to gain 3hp from an x pipe over none, then im not going to run one.

 

You don't lose as much lowend with the x-pipe as with just true duals from what i've heard. I used to run true duals with straight pipes and lowend went to ****. The x increases the scavenging (sp?) effect and equals out the pulses between the left and right banks.

 

HERE is a link I found to some info on the X and H pipe.

Some info posted by Blaster on post #9 in the link.

"H pipe will balence pressure in both pipes BUT X will also scavenge the gas to help evacuate the engine cylinders. Think about the way an engine fires and imagine each exhaust stroke as a pulse, one after each other. As a pulse travels down the pipe and crosses over in the X it should, in theory, create a vaccuum and help pull the next exhaust pulse on the other side. I also believe cam overlap together with a high flowing (velocity) exhaust also helps eliminate intake reversion and helps bring more air into the cylinder.

X pipe will sound a bit quieter than an H pipe too."

I have the Magnaflow X-Pipe part #10790 in my truck with dual 2.25" exhaust. Magnaflow x-pipes are really nice. I bought the not stainless one for around $65 from a local authorized Magnaflow dealer.

I've also heard that you get less poping sound in the exhaust when the truck is decelerating. (sp?)

Hope this helps.

 

thanks, I searched an hour and didnt see that thread.

 

I'd say go with an x pipe, a buddy at work has true duals that go all the way back, no x pipe or nothin and it sounds raspy *** hell and pops really bad, sounds like he has a honda engine in there horrible, so I say go with the x pipe

 

Tractionless, thanks for the reference :-)

For 5 years I had straight duals without a crossover and much like StrokeAce already mention above, lowend torque will be down. Without a crossover of some sort, each engine bank will "see/feel" different resistance from the pipes, especially since the exhaust system doesn't go straight back. Don't forget, the drivers side gets alot more pipe than the passenger side.