new Style Tach issues
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Logistics Pro
Joined: Jan 2011
Posts: 4,762
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From: Antelope Valley ,CA
new Style Tach issues
Hi all
Awhile back I bought the Wings (by Stewart warner) 6 gauge set , all is working good except the Tach . The Tach is the newer style that works off Pulse per rotation (PPR) I have it set at 4PPR which the directions says is correct, old engines use 1/2 the number off cylinders . But my tach reads about 1100 rpm at idle and reaches 7000 rpm before the auto trans shifts (sounds more like 2500 rpm) My old Mini Tach reads correct .
I tried switch the PPR down (first tried 2-2.5-3-3.5 ) , but then it doesn't respond correctly at 3 the idle went down to 800 but tach didn't move quick enough at higher rpms . Anyone else have experience with this ? I am thinking i got a bad tach , still under warranty ,so that's an option .
thanks in advance
Mike
Awhile back I bought the Wings (by Stewart warner) 6 gauge set , all is working good except the Tach . The Tach is the newer style that works off Pulse per rotation (PPR) I have it set at 4PPR which the directions says is correct, old engines use 1/2 the number off cylinders . But my tach reads about 1100 rpm at idle and reaches 7000 rpm before the auto trans shifts (sounds more like 2500 rpm) My old Mini Tach reads correct .
I tried switch the PPR down (first tried 2-2.5-3-3.5 ) , but then it doesn't respond correctly at 3 the idle went down to 800 but tach didn't move quick enough at higher rpms . Anyone else have experience with this ? I am thinking i got a bad tach , still under warranty ,so that's an option .
thanks in advance
Mike
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Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
I am assuming it should be set with "2" and "4" ON. I think it means 2 X 4.
1. If the RPM reads double, re-set the DIP-switches for 1/2
the PPR of the current setting.
2. If the RPM reads 1/2, re-set the DIP-switches for 2 times
the current PPR setting.
3. If the RPM reads 1/4, re-set the DIP-switches for 4 times
the current PPR setting.
1. If the RPM reads double, re-set the DIP-switches for 1/2
the PPR of the current setting.
2. If the RPM reads 1/2, re-set the DIP-switches for 2 times
the current PPR setting.
3. If the RPM reads 1/4, re-set the DIP-switches for 4 times
the current PPR setting.
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