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Racing Beat Peripheral Port Housings?

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Old 04-10-23, 03:41 AM
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Racing Beat Peripheral Port Housings?

Figured I'd start this thread since I'm interested in these and there seems to be no info on them in here. Anyone tried/running them?

https://www.racingbeat.com/RX7-1986-...ngs/11021.html
Old 04-10-23, 09:02 AM
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easy 300hp at the flywheel
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Old 04-10-23, 11:41 AM
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I've tuned engines with them, later opening/angled ports such as these and some other home brew periphs I've seen in some SCCA 12As tend to be more midrange-y than many of the earlier opening MFR and PR/drag oriented configs I've been playing with.

Also, yes, about 310 crank only revving to 8500ish is what I've seen repeatably on a couple relatively unomptimized setups - there's definitely more in there however it'd be some work to get it.

Last edited by dguy; 04-10-23 at 11:44 AM.
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Old 04-10-23, 10:14 PM
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Thats pretty amazing! Thanks for the responses
Old 04-11-23, 07:22 PM
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Awww, they don't list the '74-85 housings anymore. I guess I bought the last new GSL-SE rotor housings for a while.
Old 04-12-23, 09:26 AM
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Originally Posted by peejay
Awww, they don't list the '74-85 housings anymore. I guess I bought the last new GSL-SE rotor housings for a while.
Mazda has 144 of them right now.
Old 04-13-23, 09:33 AM
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I had inquired about them for their NA application and it seems to be catered to drag racing or a tight ratio gearbox as the power is very peaky, didnt suit my application or gearing but a nice option for others!
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