Header installation

Managed to remove the old exhaust on both sides and install the left relatively easy side, easy because there's more room. Tomorrow will be the narrow side, might have to raise engine slightly, or remove head, or take entire engine out. We'll see.

Has anybody ever dynoed Tri-Ys on a 2V Cleveland, and compared to either orig exhaust or normal headers?

Time for the right side, least space between head and frame, and battery tray in the way.

Got it in No need to take out or even lift the engine. Took a bit of trying, but there was enough room

And a picture for the orig-freaks, before the label burns off...

Done. First start was accompanied by plenty of smoke as the paint burned off. And a couple of leaks where the middle and rear pipes meet just in front of the rear wheel, welded them shut.

I've had no chance to drive it, rain is pouring down, but started it and let it heat up in the garage. The sound is different. Not as deep tone, and not as V8 like, guess that's the result of the Tri-Y where the exhaust pulses come in a better sequence. Still sounds powerful, and maybe a little more "Italian".

The old log exhaust are in perfect condition. Does anybody know if they're Longchamp unique/worth anything? Or are they like many others, and heading for the trash can?

Had first test trip today. The headers are acting quite opposite of what I expected. They are quieter than before, not something I'm too happy about, though it's appropriate now as an Italian GT. The headers are thick walled, but still, I'm a bit surprised they're quieter. Still, I had to stop on another matter at the local mechanic, and all three came out to see what made that sound, so it can't be all bad...

Secondly, being low diameter and tri-y, I had expected more power at low rpm and no significant change at high rpm. What I got was no change at low rpm but much more power at high rpm. WOT is considerably faster.

I know that when installing headers I need to richen the carb (I've read my own book), and I haven't gotten around to that yet, so when I've done that I'll hopefully see some more power at low rpm.

quote:

The headers are acting quite opposite of what I expected. They are quieter than before, not something I'm too happy about, though it's appropriate now as an Italian GT. The headers are thick walled, but still, I'm a bit surprised they're quieter. Still, I had to stop on another matter at the local mechanic, and all three came out to see what made that sound, so it can't be all bad...

I have stainless tri-y headers on my 66 Mustang (GT350 tribute) and one of my neighbors regularly tells me he loves the sound of my car, and couldn't figure out why it sounded so different. After checking out my headers, he attributes the difference in sound to the tri-y's.

quote:

I know that when installing headers I need to richen the carb (I've read my own book)