What is the optimal exhaust for a high performance 1.9l for SCCA FP or GTL? I have seen both the standard 4-1 header as well as the tri-Y. What are the advantages of either or some other configuration. I have also read that Stan C has a 'through tunnel exhaust' in his GT - how is this accomplished?
Optimal Exhaust
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15,448 Posts
Depends on your needs, your driving style, your tracks you run, and your engine's specs. A clubman level engine will need a totally different exhaust than a full-tilt, no-holds-barred/cost is no object National-level engine. And a tight'n'twisty track needs a different exhaust than say, Road Atlanta or another 'dyno with turns' type of track.
FWIW, no one 'serious' in GTL or F Prod. uses a 4-2-1 header, they all use 4-1 custom built designs. 4-2-1 designs tend to be compromise headers, trying to cover a broad rpm range.
What specs are you starting with?
FWIW, no one 'serious' in GTL or F Prod. uses a 4-2-1 header, they all use 4-1 custom built designs. 4-2-1 designs tend to be compromise headers, trying to cover a broad rpm range.
What specs are you starting with?
Joined
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870 Posts
exhaust headers.
Hey Jeff.
If you want to built headers for your
Opel come to see mine. They are custom
built from a picture that Bob sent
me years ago. I might be able to
scan you the picture too.
It make big improvement.
Pete
Hey Jeff.
If you want to built headers for your
Opel come to see mine. They are custom
built from a picture that Bob sent
me years ago. I might be able to
scan you the picture too.
It make big improvement.
Pete
Joined
·
870 Posts
Tube 1 5/8"
Length 32" - 34" within 1/2"
Collector 2 3/4" 8" Long
Exhaust Pipe 2 1/2"
Length 32" - 34" within 1/2"
Collector 2 3/4" 8" Long
Exhaust Pipe 2 1/2"
Attachments
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