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Robbbyg Robbbyg is offline
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Join Date: Aug 2008
Posts: 1,138
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Maybe its using used parts that is the cause of your probs and not inherent socalled weakness of the 915, i see a couple of guys here are running 400hp with no problem
Interesting read here which is exactly what i meant when i said the shorter gears of the 915 is like putting extra 50hp at the wheels over the standard 930 box

Transmissions & Clutches | Rennsport Systems | Porsche Performance Systems and Support

Ill quote first line anyway as written by Rennsport for the unbelievers and knockers
Transaxles and Clutches
Performance gearing has been a staple of Porsche performance since 1948. Selecting the proper transmission ratios for your gearbox is an integral part of improving Porsche 911 automobiles. It has been said that installing a set of shorter spaced gear ratios is like adding 50 HP to your car!
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Last row 1977 3.0 930 260hp built, still reassembling
Row 1998 996 MK1 3.4 296hp new daily driver
Old 11-15-2014, 09:36 PM
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