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Registered User
Join Date: Jul 2015
Posts: 32
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New conrods for hot street engine?
I am considering getting new conrods for my 2.7 litre hot street/trackday engine build (high comp pistons, 908-ish cams, 46 mm PMOs). Aiming for 250 BHP+ and the revlimit is going to be approx. 8000 rpm. Is it worthwhile replacing the stock conrods with a set of Carrillo 4340s for this application given that bearings and bolts are replaced, or is this an upgrade that falls into the nice to have category?
Thanks! |
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11-05-2017, 10:16 AM
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Registered
Join Date: Oct 2003
Location: Central Fla
Posts: 1,864
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For that rev range I would get a set of better rods, given that by the time you re size both ends, upgrade the bolts, magnaflux, shotpeen etc you are close to what a set of most race rods cost and know the age of the parts
Mike Bruns
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The two most useless things to a driver are the braking distance behind you and nine-tenths of a second ago. |
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11-05-2017, 10:39 AM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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Nice to have would be titanium.
Rod Info - Pauter
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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11-05-2017, 02:16 PM
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Registered
Join Date: May 2005
Location: Loxahatchee, florida
Posts: 2,894
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You can find pauter rods pretty reasonably priced. Titanium rods time out after a couple hundred track hours.
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11-05-2017, 03:07 PM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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I'll second the Pauter rod suggestion and add a concern about securing the flywheel at 8K with a 6-bolt crank.
 Personally, I would keep the max revs around 7800 to help case longevity (if its Mg) and keep the flywheel on the crank.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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11-05-2017, 05:24 PM
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Registered User
Join Date: Jul 2015
Posts: 32
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Thanks everyone! Slightly confused about the Pauter vs. Carrillos though. I'm finding Carrillos at c. 1,200 USD whereas Pauters seem to be around 1,700 USD?
Last edited by RSSweden; 11-06-2017 at 06:50 AM.. |
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11-06-2017, 06:40 AM
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Registered
Join Date: Jul 2005
Location: Atlanta
Posts: 1,241
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What port sizes?
Yes to Carrillos.
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No physical quantity completely explains its own existence |
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11-06-2017, 06:55 AM
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Registered User
Join Date: Jul 2015
Posts: 32
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Quote:
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11-06-2017, 07:05 AM
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My Garage
1971 Porsche 911
Baja Bug
