Tuning aftermarket headers on a Triumph Spitfire, or any car really.
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- čas přidán 25. 08. 2024
- Aftermarket headers usually don't fit too well because of warpage that happens during welding. Here is my solution to get them to mate smoothly to the head. Hopefully it helps you too.
Oh, and when I last rebuilt my engine I apparently had the piston rings gapped too tightly. The specs are .012 - .022 and I gapped them at .012. Thought I was building a tight engine, but apparently it was too tight. Go figure. So I broke some piston rings after almost 5000 miles. This time I gapped them at a loose .018 to be safe. Engine fired right up and the headers are doing much better too.
I have the same set of Pace Setter headers and they are pretty bad like that as well. I found that the outer parts of the main plate that the headers weld into was warped. I am trying to figure that out currently.
I started with 150 grit, then went to something more aggressive before coming back to 150. It sealed so much better than it did before. Probably didn't have to be as flat as it is, but sure doesn't hurt.