[Formulajones]

Originally Posted by vidguy

My SGF system wore a hole in my stock metal line installed in my 75 Formula. Car started sputtering..
I had been running the system for about 7 years. It must of taken a long time to wear the hole in the metal.

Those pipes that go over the axle could be bent more upright in my opinion.

If you let the muffler hang lower than the differential center this might not be an issue. In my case I had, and still do, run the muffler so it sits no lower than the center section of the rear. The issue resolution in my case was that I had the tank out before I could remove the line to find the problem. By then the Tanks-Inc and the 1/2" ptfe fuel line upgrade idea was planted..
The original install was a hassle due also to the hangers that were included being parts store generic rubber hangers. The proper hangers they recommend were extra. I posted about that at the time.

I recently re installed this entire rear section when I upgraded the tank and lines. I trimmed the over the axle tubes on the end that goes in the muffler, and I cut off a piece of the brace up on the floorboard to give the fuel line a little more clearance. I then put some hard plastic hose on it too in that area..

I appreciate the system being available and it fits well from a ground clearance perspective, but the rear pieces can be trouble. Maybe it's typical of exhaust installs. And these 2nd Gen cars are a puzzle. On the other had the Torque Tech system I installed in the 67 GTO was as easy as hanging clothes in an empty closet.

http://forums.maxperformanceinc.com/...ight=hole+fuel

I always hang the transverse muffler in such a way that when the car is on the ground, the bottom of the muffler is actually above the lowest part of the rearend center section. I can see about 2" of the cover and the lower bolts that hold it on. Basically the muffler is only protruding below the gas tank about 2 or 3 inches at most, looking at it from the rear of the car. Hardly noticeable, and I spend some time in this area to get it "just right" for my taste. With the muffler tucked up like this, the over-axle pipes at the top are barely 1/2 to 3/4" away from the floors. By doing this, and tilting the muffler slightly at the same time, it keeps the tail pipes tight to the tail panel. Low hanging tail pipes drives me nuts on an otherwise nice car. So I work with it till I get what I want.

As far as the hangers go, I've never used any hangers supplied with an exhaust kit. I use only correct style restoration hangers that are specific to the model I'm working on. Of course these are designed to fit factory 2" or 2 1/4" systems, so I modify them in a subtle way to work with the 2 1/2" system so when looking at the car at first glance, you see factory appearing and correct hangers and clamps.
On our 69 Z/28 for instance, the tail pipe hangers supplied with the Pypes system aren't even close to working on a 1st gen. They are designed more for the second gen tail pipe configuration. 1st gen tail pipe hangers are actually up inside the wheel well beside the tires. Not at the trunk drop offs next to the gas tank like a 2nd gen.
Matter of fact, getting back to the height of the muffer, when using the factory intermediate pipe hangers on this car (they attach right before going over the axle) they placed the muffler perfectly with the over axle pipes just far enough from the floor as I described above. I didn't have to modify a thing. So in some cases, like this one, using OEM restoration hangers actually made the Pypes system fit very nice.

In a nut shell, when I buy an exhaust kit, I'm mainly after the mandrel bent pipes and performance mufflers. The rest of it I generally don't use and prefer to work with it, and plan to change things going in to satisfy myself.

Yes, I agree with you. The Torque Tech stuff is excellent!! Unfortunately they are now out of business. They were the only company out there making correct 1st gen mandrel bent 2 1/2" tailpipes that had the correct bends putting the tail pipe exit under the leaf spring like the factory did it. Unfortunately they closed doors before I could get another set from them.