power difference between log tubular turbo manifolds?

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Dec 27, 2004 | 12:23 PM

#21

eviltwins

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Quote:

Originally Posted by mongse

ere the primary enters the log and kill flow. Those Full-Race tests are a joke. Has anyone actually seen their log manifold? It looks like ****. That's nothing more than a quick advertisement for their tubular manifold, which the ricers will scoop up because of their "hard data".

The reason they built the log manifold like they did is because that's what 90% of log manifolds made for hondas look like, most of them are weld-el's. They didn't do the test as a comparison for all V8 guys, they did it as a comparison for one of their specific markets.

I, for one, would not be suprised at all to see 50 RWHP on a 500 RWHP car going from logs to tubulars. I switched from a log design like you're talking about to tubular headers with merge collectors, never dyno'ed it before and after but I had to make big changes to the fueling and it started to make boost about 1000 RPM's quicker and full boost was about 500 RPM's quicker, they do make a big difference. For space constraints or for a moderate horsepower build, a log style like you're running works perfectly fine, but for a guy trying to make 1150 horsepower on pump gas there's no way I would use logs on that setup.

Dec 27, 2004 | 02:26 PM

#22

PRAY HRD

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From: CISSNA PARK, IL

wow, this really blew up nicely since the last time i saw it. i have decided to have a custom set of tubulars made after all. the question like i said was just out of curiosity. i'm not concerned about the price, just the best piece for the task at hand.

thanks again,
Dave

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