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914-6 GT | profile | all galleries >> NP - The 914-6 GT Project >> NP 2.8 RSR Twin-Plug Race Engine #1 >> 6-Pin BOSCH Programmable Rev Limiters - pn B 227 080 017 / Twin-Ignition >> 6-Pin BOSCH 4/6/8 Cyl Programmable Rev Limiters pn B 227 080 017 tree view | thumbnails | slideshow

6-Pin BOSCH 4/6/8 Cyl Programmable Rev Limiters pn B 227 080 017

BOSCH pn: B 227 080 017 https://pbase.com/9146gt/image/166953494

BOSCH Date Code: 052 (Dec/1980) / Serial Number: 2299 Box #1 https://pbase.com/9146gt/image/166953477

BOSCH Date Code: 241 (Jan/1982) / Serial Number: 2883 Box #2 https://pbase.com/9146gt/image/166953458

The 6-Pin BOSCH Rev-Limiters are a programmable device designed to be used in 4/6/8 cylinder competition engine applications--they are a race part, not used in street applications https://pbase.com/9146gt/image/166953483. These units have a built-in adjustable 'Pot" https://pbase.com/9146gt/image/166953471 which allows the user to set a 'cut-off' point to the coil in the ignition at a specified RPM thus protecting the engine from over-revving. I believe that the 6-Pin BOSCH units were the predecessors to the later 73' and 74' Porsche 911 RSR BOSCH 8-Pin Programmable Rev. Limiters. Additionally, the 6-Pin BOSCH Rev-Limiter box may have been first produced for the MY 71-72 and possibly for the 911 ST MFI competition engines. Regardless, it is a welcome addition to any high-strung, twin-ignition and very expensive today vintage race motor.
6-Pin BOSCH 4/6/8 Programmable Rev. Limiters, OEM
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