Has anyone tried this X flow?

[secondchance]

http://www.dynomax.com/mufflers.php?muffler=ultraflox

"X" flow supposedly should help with flow resulting in better scavanging. Down side has always been the dreaded drone.
Looks like this piece may achieve better flow with minimal downside. Has anyone tried this?
At leasy visually this piece looks like it may splice in for our Zs with minor alteration.

[Bob Eyres]

This is the first time I've seen that type of resonator. I like the combo of Xpipe/Resonator in one unit. But look closely at the size of the pipe on the inside compared to the outside inlets. It sure looks like it necks down to a smaller size inside. And for anyone with a genuine 3" exhaust, that's a no, no.

They say that the inside X is 3", but the illustration makes me question that.

[secondchance]

Originally Posted by Bob Eyres

This is the first time I've seen that type of resonator. I like the combo of Xpipe/Resonator in one unit. But look closely at the size of the pipe on the inside compared to the outside inlets. It sure looks like it necks down to a smaller size inside. And for anyone with a genuine 3" exhaust, that's a no, no.

They say that the inside X is 3", but the illustration makes me question that.

It could be the illustration is for 3-1/2" inlet and outlet unit.
If the inside is truly 3" this could be an interesting piece.

[QB93Z]

It seems to me that the X design they have created would be very restrictive. On the inlet side there are two 3" diameter pipes for a total cross sectional area of 28.2 square inches. At the center of the X the pipe would have to be 4.2 inches in diameter (or some oval shape) to have the same cross section area. And there would need to be a smooth transition through the shape changes.

Jim

[Bob Eyres]

Originally Posted by QB93Z

It seems to me that the X design they have created would be very restrictive. On the inlet side there are two 3" diameter pipes for a total cross sectional area of 28.2 square inches. At the center of the X the pipe would have to be 4.2 inches in diameter (or some oval shape) to have the same cross section area. And there would need to be a smooth transition through the shape changes.

Jim

I agree, but it may be more than just the actual cross section area to be concerned about. The shape of that area at the center of the X where the four pipe sections meet looks critical to the effectiveness of the X pipe. There may be a lot more involved in tuning those pulses than us bench racers are aware of.

[secondchance]

Originally Posted by QB93Z

It seems to me that the X design they have created would be very restrictive. On the inlet side there are two 3" diameter pipes for a total cross sectional area of 28.2 square inches. At the center of the X the pipe would have to be 4.2 inches in diameter (or some oval shape) to have the same cross section area. And there would need to be a smooth transition through the shape changes.

Jim

I hear what you are saying - two 3" dia pipes crossing each other vs. two pipes merging and joined w/ larger area open to each other.

[secondchance]

Actually, taking another look at the illustration, area shared by the 2 pipes looks pretty substantial.
The whole idea of X flow is utilizing pulsing and resulting low pressure of pulse tail end of the opposite bank to create suction for the front end of the other bank.
I think, if the inner pipes are indeed 3" dia., this could be a worthwhile piece especially for stock piece replacement.

[QB93Z]

Buy one and bring it over. I have a saws-all. We can cut it in half and take some measurements.

Jim

[secondchance]

Originally Posted by QB93Z

Buy one and bring it over. I have a saws-all. We can cut it in half and take some measurements.

Jim

Can I try it on my car first? My exhaust might end up w/ band clamps for the entire length!

[XfireZ51]

There appears to be 2 variations of the Xpipe design.
One variant is made by slicing the sides of the pipes and joining them at the opening. The SW seems to be of this type. A second type utilizes a common center box with the inlets and outlets merged. Some of these appear to retain the individual pipe contour as they merge or x-over.
Here's an example w 4" center to center.
http://cgi.ebay.com/ws/eBayISAPI.dll...r#ht_500wt_689