2.7RS Motor, What is the specification - Dan knows! |
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2.7RS Motor, What is the specification - Dan knows! |
Randal |
Jan 22 2006, 11:19 AM
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#1
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
Dan mentioned that Larry Sharp was running a 2.7RS motor that was previously in a 914. This was in Trekkor's painting thread.
Question for Dan: What is the specification for a 2.7RS motor and how much power/torque do they put out? |
ArtechnikA |
Jan 22 2006, 11:32 AM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
210HP @ 6300, 188,4 lbs-ft@5100 MFI 8,5:1 compression, early (2,0) S cams. 46/40 valves, 36/35 ports. i see lots of engines described as "2,7RS spec" but when you look at the build sheet, you find all it means is 8,5:1 compression. IMO - no MFI, no ports, no early S cams - no "RS Spec" engine... |
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TimT |
Jan 22 2006, 11:32 AM
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#3
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retired Group: Members Posts: 4,033 Joined: 18-February 03 From: Wantagh, NY Member No.: 313 |
If its a real RS spec engine, with MFI it should put out about 210hp, and 188 lb/ft torque
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anthony |
Jan 22 2006, 11:35 AM
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#4
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2270 club Group: Benefactors Posts: 3,107 Joined: 1-February 03 From: SF Bay Area, CA Member No.: 218 |
I'd recommend that everybody with some interest in 911 parts (six cylinder engines, suspension, transmissions, wheels, etc) get Bruce Anderson's "Porsche 911 Performance Handbook". It's one of the best Porsche resources out there and great reading for motorheads.
To summarize: first use of Nikasil cylinders on a production Porsche bore increased to 90mm retained 70.4mm stroke case was reinforced internally at the main bearings and the base of the cylinders diameter of cylinder spigots was increased to 97mm (this is the famous 7R magnesium case that everybody talks about) he also goes on to say that the engine was otherwise identical to the 1973 911S engine except for the different cam in the MFI unit. 210 DIN hp at 6,300rpms. |
Trekkor |
Jan 22 2006, 12:08 PM
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#5
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
OK, I'll take one. (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif)
Randal, whatcha doin'? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) KT |
carr914 |
Jan 22 2006, 01:01 PM
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#6
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Racer from Birth Group: Members Posts: 118,470 Joined: 2-February 04 From: Tampa,FL Member No.: 1,623 Region Association: South East States |
Anybody need a set of 2.7RS pistons & cylinders? Used but very nice shape. Got a set of factory 2.8s, so these will go if my engine guy hasn't already sold them already.
T.C. |
Allan |
Jan 22 2006, 01:16 PM
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#7
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Will these work on a '77 2.7 motor? I may need them shortly depending on what the rebuilder says about mine when he tears the motor apart. |
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ArtechnikA |
Jan 22 2006, 01:19 PM
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#8
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
do you also have a set of the ultra-rare 2,8 heads? 'cause otherwise, you may have an interesting with compression ratio ... |
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J P Stein |
Jan 22 2006, 04:16 PM
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#9
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Mr. Anderson also gives the set up of a lightly modded
2.7L that, according to the dyno chart provided, puts out about the same amount of power "listed" for the RS motor. Many say the RS motor puts out closer to 230hp than 210. I used "Anderson's hotrod motor" as a starting point for mine... more cam, more compression and am pleased. Like any hotrod, tuning it is a learning process, but getting there is half the fun....after you're done getting pissed off (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) His jetting set-up for Webers seems spot on....a real plus. |
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