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Non Pontiac Motors in Pontiacs includes factory 403,305,350 Chevy, Buick V6, Also Pontiac Motors in non-Pontiacs! |
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#1
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Vintage Sun tach compatiable with LS1
I need some help here. I have 69 Firebird, using TCI Subframe and 04 GTO driveline. I am keeping the car original looking, exterior, wheels, and interior. I have a 1970 one piece (younger reads may not remember the two piece tachometer) that I bought new. Yes, back in 70.
Anyway, it is in a chrome cup for mounting on steering column. I would like to use that tachometer with the LS1 wiring harness. Obviously no points and 8 coils! Anyone done this or know where to start? Thanks! |
#2
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Good question.....I had delt with this myself.
I had a collection of NOS and used Sun instruments/tach for a modern drivetrain project, like a LS1 or LS2. I found this company online who had what I needed, but sold all of the SUN parts on ebay ($$$$ !!) after I decided to use modern gauges. Try these guys, I think its who I talked with. Might be more online too. http://www.instrumentsrus.com/sun.htm bty...there is a lot of info online about this, seems like many have the same application. Good luck, Jeff |
#3
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The LS tach signal is the same as a 4 cylinder signal. So as long as your old Sun tach had the ability to work with a 4 cylinder engine, you should be fine. You may need a pull-up resister as I did with my Autometer tach. There are details in my build thread. Link in sig.
Andrew |
#4
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And if you can't change it to a 4 cylinder setting, the tach output can be adjusted with HPTuners.
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'73 Formula 400 Cammed LS1/T56/3.73's 12.92@106.04 2.03 60 ft. <~~ Bone stock LS1 with 4L60E/3.08's Went 12's in pure daily driver trim! A/C, leather power seats, power steering, full stereo, sound deadening, power windows, full suspension, true street tires, power 4 wheel discs, and 25MPG! |
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