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Registered
Join Date: Jun 2006
Location: Adelaide Australia
Posts: 886
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HP Estimate Please!
Can someone please give me a power estimate on these specs....
66mm crank 85mm pistons 10.5:1 2247cc DC 40 cams 36mm intake, 35mm exhaust Twin plug SSI's with rally exhaust 7500 rpm limit 98 octane fuel I'm hoping to crack 200 but not sure if I'm being to optimistic! Thanks Guys
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'74 RS 3.0 Replica Porsche 968 Clubsport SOLD '70 911E Bahia Red SOLD '71 911 S/T Replica 2.3 Twin plug BEAST  SOLD
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03-04-2008, 02:27 AM
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Cameron, Looking at the specs. of a 1971 911 S, 2195cc, MFI, 9.8:1 got 180hp@6500, your 2247cc with DC-40's and 10.5:1 twin plug and webers? should see 195 to 200 with proper jetting and chokes. You are running Webers? A bigger lift cam will help you more on the goal for 200 + hp.
Tell us more on you induction, carbs or MFI.
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Mark Jung Bend, OR MFI Werks.com Last edited by 356RS; 03-04-2008 at 07:02 AM.. |
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03-04-2008, 06:39 AM
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Registered
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Location: Adelaide Australia
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Going with the 40 Webers I have due to budgetary contraints
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'74 RS 3.0 Replica Porsche 968 Clubsport SOLD '70 911E Bahia Red SOLD '71 911 S/T Replica 2.3 Twin plug BEAST SOLD
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03-04-2008, 06:22 PM
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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DC44s on 102 lobe center will get you over 200HP. You should be able to get by with race springs on those cams, w/o Ti hardware given your redline. Talk to Camgrinder to confirm.
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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03-05-2008, 12:28 PM
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Location: Adelaide Australia
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Thanks Kenik
I've been researching your posts on cam choice as it looks like we are looking at building something similar.... With the cams you have mentioned is the torque curve the same or close to the DC40? Perhaps a bump in redline to 7800 might not be out of the question if there's not a heap of lost torque. If the DC 40 runs from about 3500 to 7500 whats the spread for DC44's? Thanks, Cam
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'74 RS 3.0 Replica Porsche 968 Clubsport SOLD '70 911E Bahia Red SOLD '71 911 S/T Replica 2.3 Twin plug BEAST SOLD
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03-11-2008, 04:58 AM
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1957 Porsche 356 A Coupe 2.7 Short Stroke
1972 Porsche 72 Coupe
