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Rotors And Hp

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Old 09-09-2003, 01:49 PM
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the 20b rotors are bigger then 13b rotors right. So I guess going by rotor count is not a good way to estimate hp on a rotary. While on this what is the hp on a 20b?



And how much hp is the 13b?
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Old 09-09-2003, 02:05 PM
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The rotors are the same between the Cosmo 20B & the FD 13B-REW.
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Old 09-09-2003, 03:05 PM
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Originally Posted by epion2985' date='Sep 9 2003, 10:49 AM
the 20b rotors are bigger then 13b rotors right. So I guess going by rotor count is not a good way to estimate hp on a rotary. While on this what is the hp on a 20b?



And how much hp is the 13b?
yah theres 3 rotors in a 20b and 2 in a 13b.



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Old 09-09-2003, 06:27 PM
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how much hp does 13b make? 20b?
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Old 09-09-2003, 07:02 PM
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Asking stock numbers for 13b and 20b?
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Old 09-09-2003, 07:40 PM
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Which 13b, and remember 20bs have smallish twins like 13brew's do and were auto only.
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Old 09-10-2003, 12:27 PM
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I meant on the 13b and 20b engines alone stock with no turbos, how much hp do those engines put out?
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Old 09-10-2003, 01:38 PM
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Originally Posted by epion2985' date='Sep 10 2003, 09:27 AM
I meant on the 13b and 20b engines alone stock with no turbos, how much hp do those engines put out?
you need to refine your question



a 76 13b makes 128hp stock

an 89 13b na makes 160hp stock

the na 20b makes 450ps stock but the only non turbo 20b there ever was is the race motor



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Old 09-10-2003, 02:10 PM
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[/QUOTE]but the only non turbo 20b there ever was is the race motor[QUOTE]



lol, I wouldnt want an na 20b, no turbo is no fun ^^



I am planning on doing a swap to a 20b and wondering if it will justify the cause, 400+ hp stock justifies it VERY MUCH. That and a nice turbo and you are rolling 600-700hp, that and and insane turbo and you can probably hit 1000+ hp. I know it wont be cheap but it feels to me the beast is worth it ^^
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Old 09-10-2003, 03:42 PM
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but the only non turbo 20b there ever was is the race motor
lol, I wouldnt want an na 20b, no turbo is no fun ^^



I am planning on doing a swap to a 20b and wondering if it will justify the cause, 400+ hp stock justifies it VERY MUCH. That and a nice turbo and you are rolling 600-700hp, that and and insane turbo and you can probably hit 1000+ hp. I know it wont be cheap but it feels to me the beast is worth it ^^
OK, now I see what your getting at.



The 20B twin turbo did make a bit more HP stock then the 13B-REW, but not by much.



The 20B also has a 2 piece e-shaft which means it will flex more at high RPMs & high boost. This can be compensated for but that means a full rebuild with machine work.



600HP from a stock 20B is asking for broken apex seals IMO. 450 should be easily attainable for someone who knows what their doing.



The 13B-REW is a nice engine, & IMO can support 450 crank horse power as well. You wont get as much low end torque, but it's a direct fit & is less to build...
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