I compared the setups that I have on my vehicles here in the garage, mainly because I was curious to how much room it takes to get a "true" Xpipe in the tunnel of a C5. Obviously 2.5" would be easier than 3".

What I have on my Z06, the Borla Stainless "Xpipe".. which is two bent 2.5" pipes welded at a point to merge with each other.




Clearly no where near an X so makes me wonder if there's a power loss here but as mentioned the sound would be different. Still better than the factory Hpipe with a rusted out baffle that for some reason exists in it. Defeats the purpose of the Hpipe.

My Monte SS, dual 3" with a Summit Xpipe kit welded in. Been like this since I built the car in 2010. That's an Xpipe.

 

The one I'm going to be messing with again soon goes from the dumps to a flex tube and right into a fairly elongated 3" X-pipe before extending back to what will be an LG Big 3 axle-back. I'll get it set up as-is for the first iteration and see what it needs.

 

got my g3 laser tails, rear corners, and 3rd brake light done, then went for a quick drive. Southern California is perfect right now.

also plan on getting my wideband and boost gauge done tomorrow finally

 

You're allowed to mod a car in Commiefornia?

 

Congrats on the new gear

 

What are you going to name it?

 

A bit of a new PTFE fuel line with aftermarket check valve as the stock unit leaks, new ones are unavail and used ones ridiculously priced.

 

Some are upgrading to 99+ single pipe, but it can be a budget too. Is that not too heavy without any support?
I didn't knew there was a check valve along with this pipe.

 

Weight is not an issue. The stock valve is near fuel tank but this is easiest place for the new one

 

This x pipe conversation is something I have wondered for a while. I think a couple of factors come in when talking about design.

Space/pipe layout: Old muscle cars had pipe layout spaces apart so the X had to be severe angles.
Cost/manufacturing process: The stamped X's i'm sure are good for mass production.
Performance

I have been told that there IS an optimal cross sectional area that nets the best gains. I'm not sure what it is exactly but I'm sure it's a simple calculation.

I'm curious at which point of cross sectional area increase does the merge become a large H or a chamber?
This style to me is more of a chamber or a big H. These are super cheap



The largest cross sectional area of an X will be when you section the pipes at the centerline of each pipe and therefore the theoretical cross area = 1x pipe diameter.


These need length to make them work due to the slow merge angles. I actually made one of these for my C5 from scratch.



I initially used a generic X pipe and cut the ends to have the proper centerline of stock midpipe.







The last system I made used a stock 6th Gen Camaro 3" X pipe section. While it is a stamped version, it does noticeably have a X design and not just a chamber.




Food for thought, the C6Z uses a 3" H pipe.



C7 has a stock 3" x pipe. Maybe because of the different LT1 tone:


And then there is the location topic....how far down the the system do you put the X?


The Z pipe and Borla spaghetti x pipe is getting some traction. I'd be curious to hear one in person.
​​​​​​

 

These are the posts which completely outclass other Corvette information sources. Nowhere else do you find such depth on a topic than a good forum.

I wonder if there is more science to an X running air pulses against or across one another vs the Oval / near parallel where they just rub elbows to equalize as they pass down the pipe.

I can probably look it up, but I am also curious about the surface area of the Oval in general vs the X styles at the crossover plane where they exchange exhaust. Does it matter? Does it not? This in terms of power moreso than the sound behind the car.

 

shhhhh 🤫. I guess as long as I have CARB EO stickers I’m good. None of these cops ever know what they’re looking at. As long as it’s not obnoxious, we’re okay. I’ve been behind enemy lines long enough to know a few tricks! But I’m jealous of you, as I’m originally from Tampa, FL!

 

This speaks to my heart about living in CT as a gun owner.

 

Yup just have to get around the state inspection stuff, most cops don't know cars.
I never really named any car mods..

 

Got my 02 back from the tuner....... with a set of Lt's and 42 injectors and a C6 air intake it produced 333 hp at 6200 rpm and 332 ft lbs of torque to the rear wheels..... it runs smooth and pulls hard..... not a lot of hp by todays standards but good enough for what I will use it for..... I had the C6 intake from a 2010 GS that I owned for 12 years...... it had an A&A blower kit on it....... the C5 I wanted simple...... the tuner handled the wiring from the original MAF to the blade MAF.... the intake is almost a perfect fit but raises the front of the hood up about an 1/8th of an inch.... I will try and adjust the hood to compensate..... I am also in the process of rebuilding the headlight motors..... car sat for 8 years when the PO who was my cousin had it..... it's a long story.......

 

I'm surprised that air silencer doesn't hit the Tensioner Pulley.

 

What's the purpose there, to smooth the air when there are abrupt rpm / flow changes? Or is that some e. Missions appeasement thing which saves 0.01 mpg by smoothing the airflow?

 

Nothing smooth about that, it's a dampener to silence the air moving through the Intake so you don't hear any whistle or Engine noise. Hence why I called it a silencer..

 

Huh. I've never heard an intake noise before. Far too much exhaust volume for that!

Intake noise?

 

Supposed to be 30 degrees in the morning and clear. Think I am going to un bury the car. Put on some ear muffs and drive the car into the big city tomorrow.

The Spintech mufflers have shipped. Should give me something to do next week.