Predicting optimal header and collector dimensions
07-06-2010, 02:37 PM
#1
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Predicting optimal header and collector dimensions
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t’s no secret that the most effective exhaust systems used on naturally aspirated (non-supercharged) race engines feature merge collectors - Burns Stainless merge collectors, predominantly, in professional racing classes.
What is less obviousis that the premier racers and engine builders utilize an entire engine breathing technology, carefully designed and specified to produce near-ideal torque and horsepower curves.
Burns Stainless has developed X-design*, our parametric exhaust system modeling computer program,that has demonstrated remarkable success in predicting optimal header and collector dimensions in an extremely wide variety of applications.
The program uses as input an engine’s bore, stroke, and compression ratio, camshaft and cylinder head dimensions, horsepower and torque numbers, and the customer’s design targets, and renders detailed specifications of the ideal exhaust system parameters. In the case of a cylinder head with 4 ports, both a 4 into 1 and a 4-2-1 system will be configured. If it’s a 6 port head, we can model three possibilities: 6-2-1 (usually the best solution), 6-3-1, and 6 into 1 (rarely recommended except in some turbo applications because the excessive collector volume diminishes the merge effectiveness).
This essential service is included in the purchase of our Merge Collectors and we strongly recommend that racers take advantage of this service, as a kind of guarantee that the results are consistent with the state of the art in exhaust system tuning.
If you’re interested in enhancing your engine’s horsepower and torque curves, please complete our Race Engine Specification Form and submit it to Vinnie or Jack. The results may surprise you.
What is less obviousis that the premier racers and engine builders utilize an entire engine breathing technology, carefully designed and specified to produce near-ideal torque and horsepower curves.
Burns Stainless has developed X-design*, our parametric exhaust system modeling computer program,that has demonstrated remarkable success in predicting optimal header and collector dimensions in an extremely wide variety of applications.
The program uses as input an engine’s bore, stroke, and compression ratio, camshaft and cylinder head dimensions, horsepower and torque numbers, and the customer’s design targets, and renders detailed specifications of the ideal exhaust system parameters. In the case of a cylinder head with 4 ports, both a 4 into 1 and a 4-2-1 system will be configured. If it’s a 6 port head, we can model three possibilities: 6-2-1 (usually the best solution), 6-3-1, and 6 into 1 (rarely recommended except in some turbo applications because the excessive collector volume diminishes the merge effectiveness).
This essential service is included in the purchase of our Merge Collectors and we strongly recommend that racers take advantage of this service, as a kind of guarantee that the results are consistent with the state of the art in exhaust system tuning.
If you’re interested in enhancing your engine’s horsepower and torque curves, please complete our Race Engine Specification Form and submit it to Vinnie or Jack. The results may surprise you.
