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polizei's Avatar
 
Join Date: May 2007
Location: Collegeville, PA
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Camshaft options for twin plugged 3.4L Motronic

Guys,

I'm rebuilding my 3.2L Carrera into a reliable, street performance car. I'm sticking with Motronic for now but building so that I can go Carbs or ITBs down the road, with the understanding that I'll need to change camshafts when I do make that move.

I realize Motronic limits my camshaft options, but I'd like to what my options are. My goal is a reliable street rod that's also fun to drive at DE events. I've read that 964, 993ss (Daugherty) and Webcams 20/21 are popular options. How will these cams vary? Any other options I should consider?

Here's my build sheet:

Carrera Crank/Oil Pump/Case
Reconditioned/Balanced Carrera rods with ARP rod bolts
Mahle P&Cs - 98mm bore with 10.4:1 static compression - "RSR" - Hemi-shaped dome with double valve reliefs
Supertec Head Studs
Supertec-Rebuilt Cylinder Heads - twin plugged - titanium springs/retainers
964/993 twin plug distributor
Motronic Induction System with Andial Splitter
J&S Safeguard to handle knock
Steve Wong custom chip
993 Heat Exchangers with Flowmaster muffler

Thanks for your input.

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Andy - 1987 911 Carrera Coupe
Old 02-01-2012, 05:43 PM
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That is the exact setup I have: I used his super cup cams from camgrinder.
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Craig
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Twinplug, head work, case savers, rockers arms, etc.
Old 02-01-2012, 06:15 PM
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Quote:
Originally Posted by cgarr View Post
That is the exact setup I have: I used his super cup cams from camgrinder.
Nice choice for the build.
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Old 02-01-2012, 08:10 PM
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Quote:
Originally Posted by cgarr View Post
That is the exact setup I have: I used his super cup cams from camgrinder.
Craig - What's the power delivery like on the super cup cams?
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Andy - 1987 911 Carrera Coupe
Old 02-02-2012, 04:18 AM
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The original setting of 2.0mm overlap gave very good low end but less at 7k. John said to set it at 1.6mm and it keeps pulling up to 7k without a problem. Very nice engine. Mostly street but some track.
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Twinplug, head work, case savers, rockers arms, etc.
Old 02-02-2012, 04:35 AM
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Quote:
Originally Posted by cgarr View Post
The original setting of 2.0mm overlap gave very good low end but less at 7k. John said to set it at 1.6mm and it keeps pulling up to 7k without a problem.
Do you know how these super cup cams compare to 3.2L carrera cams? Ideally, I'd like a cam that could pull strong up to 6500RPM and still be fun on the street.

Quote:
Originally Posted by cgarr View Post
Mostly street but some track.
That's what I'm going for
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Andy - 1987 911 Carrera Coupe
Old 02-02-2012, 04:45 AM
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Emissions are not a concern, by the way.
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Andy - 1987 911 Carrera Coupe
Old 02-02-2012, 01:04 PM
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It looks like the DC20, 993 Super Cup and 964 Super C2s are about the hottest cam I can reliably run on a street car having pistons with valve reliefs. Do any of these seem particularly well-suited for my setup?

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Andy - 1987 911 Carrera Coupe
Old 02-02-2012, 05:59 PM
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