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Registered
Join Date: Jul 2005
Location: Cleveland, OH
Posts: 1,372
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Max hp from 993 heads?
...anyone know max hp you can get with 993 heads?
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09-14-2020, 01:47 PM
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Registered
Join Date: Mar 2005
Location: Columbus, Ohio
Posts: 1,010
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Stock ones?? or ?????
I did 300 Wheel Hp with them, but the engine was not stock.... I'm guessing with a turbo they will do waaaaaay more. |
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09-14-2020, 02:47 PM
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Racer
Join Date: Oct 2010
Location: Franklin, TN
Posts: 5,887
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The question shouldn't really be how much power can you get from 993 heads. It should how long will they last at the heat and stress levels of a high output engine.
You can get 110 HP per liter with 993 heads. They will last longer than 964 heads because they use a better aluminum alloy. But, they are still going to crack eventually.
__________________
Scott Winders PCA GT3 #3 2021 & 2022 PCA GT3 National Champion 2021 & 2022 PCA West Coast Series GT3 Champion |
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09-14-2020, 02:56 PM
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Registered
Join Date: Sep 2015
Location: Costa Rica and Pennsylvania U.S.
Posts: 3,301
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head life
Yes,the head life is the RR factor.Ciao Fred
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09-14-2020, 03:21 PM
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Registered
Join Date: Sep 2015
Location: Costa Rica and Pennsylvania U.S.
Posts: 3,301
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RR Factor
RR is ROLLSROYCE.
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09-14-2020, 04:37 PM
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Registered
Join Date: Jul 2005
Location: Cleveland, OH
Posts: 1,372
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... talkn stock heads w 50mm intake and 43.5mm exh valves. 400+ hp seems high. Best I’ve seen w 993 rs heads was a Roth sport slide valve one at around 420 crank (not sure if other head work done)
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09-15-2020, 05:49 AM
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Registered
Join Date: Oct 2003
Location: Central Fla
Posts: 1,864
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We were lucky to get 30 race hours out of 4 different 964 sets over 3 years time, north of 400 hp, we have 150 hrs on the Xtreme castings and no problems
Mik Bruns
__________________
The two most useless things to a driver are the braking distance behind you and nine-tenths of a second ago. |
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09-16-2020, 03:48 PM
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Racer
Join Date: Oct 2010
Location: Franklin, TN
Posts: 5,887
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Quote:
Ok, the improved performance and heat handling abilities were important factors too......
__________________
Scott Winders PCA GT3 #3 2021 & 2022 PCA GT3 National Champion 2021 & 2022 PCA West Coast Series GT3 Champion Last edited by winders; 09-16-2020 at 04:58 PM.. |
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09-16-2020, 04:53 PM
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