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low mount manifold for stock turbo position rb25det neo


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Doesn't it logically make some sense that the factory low mount manifolds are going to spool faster than high mount? To generate pressure on the intake side requires backpressure on the exhaust side, the more exhaust volume you have to fill the slower that happens.

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On 11/24/2021 at 7:27 PM, joshuaho96 said:

Doesn't it logically make some sense that the factory low mount manifolds are going to spool faster than high mount?

Maybe. The factory manifold doesn't have a lot of science in it, so I'd be reasonably open to the possibility of a well designed high mount manifold meeting or beating the spool performance of the stocker. You probably wouldn't be able to have large diameter runners. They'd probably have to be kept at the skinny end of the workable range. Smaller diameter runners would also help with keeping the runner lengths down too, as you wouldn't be building out of such big bends.

Probably a self defeating exercise to do all that for a small runner low power high mount manifold though!

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