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Registered
Join Date: Jan 2005
Location: Los Angeles CA
Posts: 323
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re curve distributor necessary?
hi folks,
As some of you likely know by now I am rebuilding a 2.7 motor with euro RS pistons (8.5:1) and E cams. I have the original dizzie from the cis motor. Do I really need a recurve? Reurve prices from all the usual suspects run around $400. That plus a new cd box and pertronix is getting into crank fire territory...
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1971 911E 2.7RS interpretation -- Signal Orange baby! Last edited by whackit; 10-09-2008 at 10:21 AM.. |
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10-09-2008, 10:18 AM
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Yessir, you should have the CIS distributor recurved if you want maximum throttle response and performance.
IMHO, its not only well worth the money, but it runs decidedly better compared to crank-fire distributorless ignition systems.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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10-09-2008, 05:18 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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will you be using carbs ?
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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10-11-2008, 05:24 AM
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Registered
Join Date: Jul 2001
Location: mt. vernon Wa. USA
Posts: 8,704
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assuming that you're using carbs, why not look for a distributor from a 2.4E motor? Will be cheaper than recurving and you get to keep your CIS dizzy to sell and offset the price.
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[B]Current projects: 69-911.5, Previous:73 911X (off to SanFrancisco/racing in Germany).77 911S (NY), 71E (France/Corsica), 66-912 ( France), 1970 914X (Wisconsin) 76 911S roller..off to Florida/Germany RGruppe #669 http://www.x-faktory.com/ |
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10-11-2008, 07:59 AM
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Registered
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Location: Los Angeles CA
Posts: 323
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yes using carbs...
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1971 911E 2.7RS interpretation -- Signal Orange baby! |
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10-11-2008, 06:17 PM
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Registered
Join Date: Nov 2000
Location: Longmont, Colorado
Posts: 1,859
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Steve,
theoretical question how would you feel about a locked down distributor on a race only motor that never see's below 4K? I'm debating recurving a 2.4T or not, for a 2.1 race motor I'm in the middle of. my gearing allows 5K exits from all corners. (unless I really screw up something) brant
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914/6 2.0S with twin plug all metal body panels 19quarts of oil 4 gallons of gas and 1826 lbs (wet) |
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10-11-2008, 07:20 PM
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Quote:
Brant, If its a single-plug motor, you'll play hell getting the engine started w/34-36 deg advance. Twin-plug engines do better @22-26 degrees but high compression ones can bite back and will break the starter and ring gear. One reason I use MSD's on such engines is that I can use a 20deg start retard feature to get it running without risking the starter and ring gear.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com Last edited by Steve@Rennsport; 10-12-2008 at 09:54 AM.. |
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10-11-2008, 10:24 PM
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Join Date: Nov 2000
Location: Longmont, Colorado
Posts: 1,859
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I always learn something here
thanks! brant
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914/6 2.0S with twin plug all metal body panels 19quarts of oil 4 gallons of gas and 1826 lbs (wet) |
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10-12-2008, 06:19 AM
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