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#1
05-22-2020, 01:18 AM
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Sun Tach
So I am going to vent a bit. During the build of the Nova, I have ordered parts -- seems like forever. After engine was installed and fired it seemed like the SST802R Sun Super Tach II was reading slow. (I can tell when an engine is idling faster than 500 RPM). Setting the timing with a pretty nice timing light that also has a tach function ... the timing light tach was indicating right a 950 RPM. So I said OK ... tach is FUBAR and I'm not dealing with it now.
So earlier this week I started to really look at this tach issue and noticed that when the ignition sw was turned on the tach did not "zero" but indicated a point approx 3/8" below the zero marking. I know darn well it is too late to remove tach, contact seller and attempt to return it as defective -- so I took it apart to see if anything was apparent to cause the low reading. Bottom line -- as per internal makings, it is apparent the tach was made in China and whoever installed the needle on the shaft must have been in a hurry ... it was misaligned with the zero scale. Using a needle nose pliers I clamped onto the shaft and carefully rotated need back to zero position ... applied 12V and tach zeros with power on. Cannot reassemble tach to it's original configuration as I had to "uncrimp" housing to disassemble. End of story -- I am done venting and feel much better ... but beware of buying anything made in China ... even iconic Sun Tachometers ...
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know! 
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#2
05-22-2020, 01:47 AM
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And it's not just tachs. It is really hard to buy quality parts these days. Had a chronic overheating problem with a brand new engine because the brand new T-stat would not open. And don't even get me started on mechanical fuel pumps.
__________________
Don't believe everything you read on the internet ... Ben Franklin
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earntaz (05-22-2020) | ||
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#3
05-23-2020, 05:36 PM
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Got another "70s" looking tach -- looks much like the Sun Super and made by Bosch. Installed it and it read correctly. Guess where this fine German named item is made?
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know!
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#4
05-23-2020, 09:03 PM
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USA!!
Dave 67 Nova Boy
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#5
05-23-2020, 11:20 PM
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Quote:
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know!
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#6
05-24-2020, 01:13 AM
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Quote:
Dave 67 Nova Boy
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earntaz (05-24-2020) | ||
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#7
05-25-2020, 02:47 PM
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I bought one of the Bosch half-face replica tachs for my Nova. It zeros out correctly but at 2400 RPM (actual engine revs) the tach reads 3000.
IMO they're not much more than costume jewelry. 
__________________
Don't mistake education for intelligence. I worked with educated people. I socialize with intelligent people.
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earntaz (05-25-2020) | ||
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Linear Mode
