Begi Churbo vs. GT2554R - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-25-2015, 07:06 PM   #21
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Originally Posted by Braineack View Post
need real dyno comparisons. the auto cam shouldnt drop off until at least 6K.

Ive seen one a long time ago one a greddy kit, ill try to pull the before and afters.


the auto cam should gain responsiveness and provide a huge bump between 3 and 5k.
Well, a cam is easy enough to swap on the dyno, I'll try to get back to backs the next time I'm on the dyno as long as I can find that cam. I'm skeptical about the lift but am very intrigued by the effects of reduced overlap on a turbo engine.
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Old 08-26-2015, 11:39 AM   #22
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I'm skeptical about the lift but am very intrigued by the effects of reduced overlap on a turbo engine.
yeah that. actually, it ends up with the same 20 overlap when i calculate it, but with both less lift and duration.

i was always under the impression the exhaust cam was the same, but it doesnt appear to be that way, at least according to solomita.


the few boosted auto motors I've seen dyno had a healthy mid range bump, with similar losses after 6K, but I've never actually seen the auto cam only. Like I said, always thought exhaust cam was the same. I'm sure they were designed to get more grunt out of the slushbox.

Last edited by Braineack; 08-26-2015 at 11:50 AM.
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