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/ˈpɔrʃə/ PORSH-ə Fan
 
LUFTKUL's Avatar
 
Join Date: Sep 2014
Location: Lafayette, LA
Posts: 652
MSD Rev Limit Setting

Installing a MSD Street Fire CD Ignition Box with MSD High Vibration Coil in a '77 911S with stock 2.7 SSIs and M&K 2 in 1 out.

What should I set the Rev Limit at? It comes with a 100 increment adjustment set at 6600rpm stock.

What should this be set at? Thanks for the help!

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1984 ROW Carrera Sunroof Coupe Schieferblau
1982 US SC Targa Moosgrun
1977 US 911S Sunroof Coupe - SOLD
Old 04-11-2015, 02:17 PM
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Location: Seattle
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I have been wondering the same thing. I have a bunch if rev limiting chips and not sure which one to use.
Old 04-11-2015, 02:40 PM
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Isn't redline annotated on the tach?
Old 04-11-2015, 02:42 PM
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Location: Portland Oregon
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Set it at 6600 RPM since your engine has cast pistons.
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Steve Weiner
Rennsport Systems
Portland Oregon
(503) 244-0990
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www.rennsportsystems.com
Old 04-11-2015, 03:53 PM
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/ˈpɔrʃə/ PORSH-ə Fan
 
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Thanks Steve! My tach is more of a orange-ish redline block showing a range between 6400 and 6600.
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1984 ROW Carrera Sunroof Coupe Schieferblau
1982 US SC Targa Moosgrun
1977 US 911S Sunroof Coupe - SOLD
Old 04-11-2015, 04:27 PM
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Join Date: Nov 2013
Location: Jacksonville, FL
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I have the same set up in my '83SC with magnecore 8mm wires and a resistorless rotor. I set mine at 6500 and haven't had an issue with it over reving. I figure a couple hundred below redline wont hurt it.

Its a great set up for the price and beats the hell out of the alternatives.

-Steve

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SSIs, Dansk GT3, EFI ITB, Instagram: @ Zinnmetallic_sc
Old 04-11-2015, 05:27 PM
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