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Registered
Join Date: Oct 2003
Location: London, England
Posts: 7
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whats the best Cam for a 3.5L Mahle Conversion
I am in the middle of converting my 3.2 to a 3.5L using Mahle Pistons and Barrels. I will also be using a Motec M48 Pro to manage the engine as well as throttle boddies.
Whats the hotest Cam grind I can use while retaining street drivability and smooth idle. My intention is for the car to be a fast road car with occassional track day use. I'd like the power to be wide ranging rather than only available at high revs like the early 'S' cars. Any help very welcome. Pete |
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02-09-2005, 07:47 AM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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PM John (the camgrinder) for his rec.
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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02-09-2005, 07:52 AM
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PRO Motorsports
Join Date: Nov 2001
Location: Burbank, CA
Posts: 4,580
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The Mod-S cam is awesome. It is the early S cam, but with the lobe centers widened. It really has a nice broad power band, and still has the nice build up of power as the revs rise. It's a terrific cam for bigger motors.
I assume your compression ratio will be somewhere above 9.8/1?
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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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02-09-2005, 07:37 PM
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second the MOD S cam. I have them on my 3.0 and they work well.
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-Jay '74 Mexico Blue 911 3.0 EFI (Fast and Loud) '70 914/6 Race Car (Faster and Louder) '71 73RSR tribute vintage race car 3.0 '68 SWB 911T "RENNRAT" 2.8 twin plug/915 gearbox '81 Magenta IROC clone in progress 3.6 varioram/G50 |
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02-09-2005, 07:46 PM
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Registered
Join Date: Oct 2003
Location: London, England
Posts: 7
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thanks guys.
my compression ratio is 10.3:1. Hence the twin spark! The Mod-S sounds like its worth checking out. Does it give a smooth idle and provide good drivability on the street at llow reves. Also, do you know the dwell, lift and lobe centre information from the mod-s cam. Also, where I can it from? Is it a regrind or billet build from scratch? Cheers Pete |
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02-10-2005, 12:00 AM
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Elgin is where I got mine. Re-Grind off the SC cams
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-Jay '74 Mexico Blue 911 3.0 EFI (Fast and Loud) '70 914/6 Race Car (Faster and Louder) '71 73RSR tribute vintage race car 3.0 '68 SWB 911T "RENNRAT" 2.8 twin plug/915 gearbox '81 Magenta IROC clone in progress 3.6 varioram/G50 |
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02-10-2005, 05:15 AM
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PRO Motorsports
Join Date: Nov 2001
Location: Burbank, CA
Posts: 4,580
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Quote:
Yes, the idle is smooth, and great driveability. The specs are the same as an early S cam, but something like 110 or 112 degree lobe centers instead of 97 degrees for the early S cam. I think Web-cam sells them outright. Maybe Elgin can re-grind your cams, but I'm not sure if there is enough meat on stock 3.2 cams to get the lift and duration.
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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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02-10-2005, 12:32 PM
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Registered
Join Date: Mar 2004
Location: City of Seattle, WA
Posts: 3,374
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send a message to the user "camgrinder" on this board for details. he will be very very helpful.
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Andy |
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02-10-2005, 03:23 PM
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Licensed User
Join Date: Feb 2003
Location: ....down Highway 61
Posts: 6,506
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Send Paul Thomas a PM also. I think he is running a GE80 in his twin plugged 3.5 MFI motor. IIRC, this is a pretty aggressive cam.
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02-10-2005, 07:32 PM
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Registered
Join Date: Oct 2003
Location: London, England
Posts: 7
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thanks guys this is really helpful. Will send PM's and let you all know how I get on.
Cheers Pete |
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02-11-2005, 01:10 AM
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