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Registered
Join Date: Jan 2005
Location: Maryland
Posts: 441
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Need cam advice?
OK I need new cams (or at least one) as I ate one with a clogged spray bar.
After talking to a few people I have learned that my current cams were reground and poorly. They were GE 40 profile. I have a set of 74 CIS cams as cores and a ful set of rockers, what would you all suggest I do to get my girl back up an running on the lesser expensive side? I have 9.8:1 compression, ported heads and PMO's. I liked the power coming on @ 3-4k but the top end 6500 or so was a wee bit flat. What grind will give me to 7k and come on around the same 3-4k? Should I regrind or buy new? Any good suggestions as where to get the work done? Thank you Josh
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1972 914-6 in the works..... 2003 Ford E-250 "work horse" 2004 Yamaha V-star Classic 1100 "early mid life crisis" 2005 Scion XB "Gas sipping" 1978 Siedelmann S25 "Ataraxia" |
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06-13-2009, 04:08 AM
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Free minder
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John Dougherty is the person to talk to. Outstanding quality of work and expertise, and he posts on
this board as "camgrinder". http://drcamshafts.com/ Camgrinder
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1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/ 2014 Cayenne platinum edition 2008 Benz C300 (wife’s) 2010 Honda Civic LX (daughter’s) |
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06-13-2009, 06:13 AM
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I assume that you read this thread that 911st bumped up recently. It contains most of what I learned when trying to research the answer to the same sort of question that you are asking.
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John '69 911E "It's a poor craftsman who blames their tools" -- Unknown "Any suspension -- no matter how poorly designed -- can be made to work reasonably well if you just stop it from moving." -- Colin Chapman |
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06-13-2009, 04:50 PM
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Moderator
Join Date: Dec 2001
Posts: 9,569
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74 CIS cams aren't suitable for the regrind
Have John make you some new "mod-solex" cams.
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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06-13-2009, 05:30 PM
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Join Date: Jan 2005
Location: Maryland
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thanks guys. I have placed a call to John. The attached thread is in a languge I don't speak very well! But I am reading for the third time and I get somthing each read......
Josh
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1972 914-6 in the works..... 2003 Ford E-250 "work horse" 2004 Yamaha V-star Classic 1100 "early mid life crisis" 2005 Scion XB "Gas sipping" 1978 Siedelmann S25 "Ataraxia" |
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06-13-2009, 07:04 PM
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Join Date: Feb 2004
Location: California
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Josh, I got your message and I will give you a call tomorrow. Sounds like the original cams were not GE40 grinds. John Cramers suggestion on the mod-solex ( DC30 ) is a good one. These cams will give you a strong mid range powerband and still pull to 7000 rpm.
You can also fill out this form so I have all the details on your combination, http://www.drcamshafts.com/caminfo.htm
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John Dougherty Dougherty Racing Cams |
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06-14-2009, 01:56 PM
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1969 Porsche 911E 2.0 E
