Quote:
Originally Posted by GriffithMetal
Stainless shrinks a bunch when you weld it. If you pass multiple welds on the same seam the area will be lower. If you are trying to remove the weld and polish then there will be low areas where you welded. IMHO smoothed out stainless exhaust is for show cars that won't be driven much. It's expensive to build and has poor longevity. Leave the welds on stainless exhaust if you plan on driving it. Be sure to back purge the tubing or use a weld flux to prevent sugaring.
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I will second this 100%... as the food grade SS exhaust on my Steve Frisbee built '32 Ford... has had to be repaired now for the second time. They (SAR) flushed the welds and polished the entire system... I drive the crap out of my stuff... and the system has/had hairline cracks at every seam. The SS also GROWS a BUNCH... and this has caused other issues.
I will nurse this thru this summer and then the car goes to Brizio for an all new exhaust system.
You know - one that actually works.
