Freddie's Back on the Road!

[MacDee]

Can you remind me, does your dual exhaust have a cross-over?

I think you are getting some kind of harmonic pulsar thing caused by coincidental chamber sizes of your mufflers and the distance to your crossover pipe.

Too wacky?

Yeah, I think you're wacky....

Exhaust does have a cross-over via an x-pipe arrangement. The pipes come together just downstream of the header outlets before going off on their separate routes back to the mufflers.
I'm sure that's not it, though. It didn't do this before the rebuild!

Besides, I think you're just yanking my chain.

[Luva65wagon]

Jeff would never do that.

[Jeff W]

I'm sure that's not it, though. It didn't do this before the rebuild!

Besides, I think you're just yanking my chain.

I am being thoughtful and thinking outside of the box. Your engine is breathing better now than before and with different valve timing. Don't underestimate the power of air and harmonics. I can drive all over at any speed in my van with the windows down without problem. When we are in the CRV and crack a window, between 45 MPH and 55 MPH the pulsing drives me bonkers. Drive faster or slower, or open a second window, and all is fine.

Without experiencing the sound myself, hard to narrow in. Maybe you need to offer rides around the block

Here is a little physics discussion that is interesting:

https://www.physicsforums.com/thread...monics.475510/

[pbrown]

Pull the drive shaft and have it checked. Maybe it got bent or banged up or something while the engine was out. I also seem to recall that it was a little on the short side.

[MacDee]

I am being thoughtful ...

Here is a little physics discussion that is interesting:

https://www.physicsforums.com/thread...monics.475510/

Very interesting... A new exhaust system is at the top of my list anyway!

Pull the drive shaft and have it checked. Maybe it got bent or banged up or something while the engine was out. I also seem to recall that it was a little on the short side.

You remember correctly. The shaft is a bit too short. Maybe I've just been lucky and my luck has run out!

I took Randy for a ride, and he seems to be suspecting wheel bearings. I can't recall if we replaced them at the time of the disc brake conversion, or just repacked them.

[Jeff W]

Very interesting... A new exhaust system is at the top of my list anyway!



You remember correctly. The shaft is a bit too short. Maybe I've just been lucky and my luck has run out!

you may remember that I have a driveshaft for your layout (C4 with little rear). You are welcome to borrow it for troubleshooting. I can bring it to the meeting next week.

[MacDee]

you may remember that I have a driveshaft for your layout (C4 with little rear). You are welcome to borrow it for troubleshooting. I can bring it to the meeting next week.

I DO remember that you have that driveshaft! As I recall, its u-joint to u-joint length is 52 5/8 inches, which is 5/8 inch longer than mine.

I may, or may not, be at the meeting. If you happen to have the driveshaft with you, and I happen to also be at the meeting, I may or may not take you up on your offer.
How's THAT for decisive!!

[Jeff W]

Almost enough of a reason for me to dig it out of the storage slot and load it up.

I thought it was 52 - 1/2... I can check if that helps.