I literally just put my hands on the valve covers - almost burned my hand on the right side (passenger side) while it was noticeable less warm on the driver side.
That's a big difference.
I will note though that I have headers that I found out are poorly fastened and even not secured at the rearmost set of bolts..
This can definitely make a big difference in how much heat is generated per side. Even if each cylinder is actually firing, the amount of heat they generate is greatly skewed between them.
as the bolts used have “heads” that are too large and they are too long so the PO has used some sort of custom metal pipe as spacers so to speak..
It's possible they did that on purpose. Yeah, they my just have butchered it together, and I've not actually ever seen it done, but have toyed with the idea many times myself. I would have used thick walled tubing and welded the tubes/sleeves to the header pipe itself.
Basically the point is to move the bolt head out to a more "wrenchable" location, rather than down deep where you can hardly do anything about it. My next set of headers will be so equipped.
Just look at factory manifolds, or even the "manifolds" headers that Ford put on the Mustang. Very crimpled tubing and kind of fugly, but the easiest headers to install anywhere around.
I will also check the heat differential between the headers.
This is where the modern infrared/laser thermometers come in so handy. Just point-n-shoot and you have your numbers instantly.
Can be a real eye-opener when you discover a cylinder or three are not doing their jobs.
Will try take some photos of my fuel situation. But it was plenty of room to route it how I did on top of the tank and as I have dual exhaust I’m not sure it has any practical purpose to run it on the other side.
Yep, dual exhaust is the bane of our existence with Broncos. We've discussed it many times over the years, and many of us have come to the conclusion that a good, free breathing single tube exhaust will be better for a Bronco every time.
You don't necessarily even lose any power potential, as the right size and design single can breathe very well. Especially for our non-race Broncos.
Some of us have re-designed the exhaust around the fuel system then. Rather than the other way around.
The original fuel lines are a quarter or so of the size of these high pressure lines so they fit easier between the body and the frame on the driver side.
Yeah, but that comes right back to the exhaust itself being the culprit. Not necessarily the larger bulk of the lines.
But no problem really. As long as you are happy with the routing, and the extra length of tubing is not a bother, and it all works well, then there's no harm done.
Just a bit of extra work on your part for the re-routing.
All it's got to do is get the gas to the engine!
Have fun. Sounds like it's almost there.
Paul