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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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Vote your Cam Choice
Specifics:
3.0L 9.5 CR JE Pistons 38mm intake ports Single plug Megasquirt II ITB on EDIS crankfire 7000 redline Track car only Lookin for broad torque range 3000 - 6500 Real-world experiences and dyno chartt welcomed!
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy Last edited by JohnJL; 07-21-2005 at 04:37 AM.. |
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07-20-2005, 07:42 PM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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just voted 'other' myself as the poll isn't showing up in the forum...
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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07-20-2005, 08:29 PM
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PRO Motorsports
Join Date: Nov 2001
Location: Burbank, CA
Posts: 4,580
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Mod-S.
Same specs as early S, but the lobe centers are widened for a broader torque curve. It's an awesome grind, and fits the bill perfectly, judging by what you stated. The engine responds nicely right off idle, and makes power from 3000 all the way to 7000. We used them in a 3.0 with 9.5/1 JE's, 40mm intake ports, 40 IDA Webers, 1 3/4" headers, and a dual out early sport muffler. Dyno'd @ 205 at the rear wheels.
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'69 911E coupe' RSR clone-in-progress (retired 911-Spec racer) '72 911T Targa MFI 2.4E spec(Formerly "Scruffy") 2004 GT3 |
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07-20-2005, 08:45 PM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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Thanks to all you who voted. Need to place the order when the sun rises (5PM NYC time Thursday). Explanations of your votes are very much appreciated.
john
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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07-21-2005, 04:56 AM
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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Talk to Camgrinder on this forum. He knows all things cam.
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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07-21-2005, 07:15 AM
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Registered
Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
Posts: 10,040
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Yes - talk to some experts - tell them your goals re type of driving and some info about other things done to the engine.
A general poll just gives you votes for what most people have heard about, or would like to have in some unrealistic world where hp is free, and all the engines are above average...
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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07-21-2005, 09:59 AM
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Registered
Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,533
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Uh Randy, I'd say that Tyson more than qualifies as an expert...
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"Now, to put a water-cooled engine in the rear and to have a radiator in the front, that's not very intelligent." -Ferry Porsche (PANO, Oct. '73) (I, Paul D. have loved this quote since 1973. It will remain as long as I post here.) |
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07-21-2005, 10:16 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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I am building a similar engine and will use a Mod-S cam. Mine will differ by being a 9.8:1 3.2SS with twin plug (bore required). I am hoping for 260, which is about what you would expect from just the displacement increase when compared to the motor Tyson described.
You could go to a hotter cam but that would shift the torque curve to a higher rpm band. This would then need to port the heads to get intake velocities low enough at high rpm. You would also have to realistically mod the valve train to be reliable at 8K rpm where the motor wants to make power.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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07-21-2005, 10:43 AM
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Registered
Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
Posts: 10,040
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So would I -- but what I said is the 'poll' -- right?
Quote:
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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07-21-2005, 11:00 AM
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Registered
Join Date: Feb 2004
Location: California
Posts: 926
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The mod-s (DC40) on 108 degree or wider lobe centers would work nicely. It will give up some power to the 964 or super cup cams below 4000 rpms, but you will have no problem making hp at 7000 rpms.
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John Dougherty Dougherty Racing Cams |
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07-21-2005, 12:08 PM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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Thanks Tyson and jp
Hi John. Yes, I trust John. In fact he already has my cores and rockers! I wanted to hear from a few others with similar setups and maybe see some torque/power curves for the options I have been discussing with John. thanks all!
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy Last edited by JohnJL; 07-21-2005 at 12:52 PM.. |
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07-21-2005, 12:45 PM
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