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#1
04-03-2009, 09:04 PM
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HELP: Tach question
I went to Performance Years today at Charlotte NC and they referred me here. I have a 68 firebird OHC. They show 2 different listings for 68. One is for the OHC, and one is for the 400 or other 68. My questions is can I use the basic Tach for 68 & will it work, or do I need to get the OHC tach. I'm hoping to get back over there tomorrow, to buy the right one. My husband says that he didn't think that the reg tach would work correctly. That it has a resister or something to change from 6 to 8 cyl.
Oh and would the harness be the same for both. Thanks for the Help! Tammy [email protected] |
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#2
04-03-2009, 09:18 PM
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They should be able to answer the question on the harness.
Buy the one for the 6cyl, They read the ign pulse at a different rate than the 8 cyl units do. Mike
__________________
so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
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#3
04-03-2009, 09:30 PM
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Tach
Thanks for the quick answer. I will buy the 6 cyl. Sad thing is I already bought the other one.... So will just try and get rid of that one, and get the 6 cyl one. When I bought the one, they didn't think it would make any difference. I thought that the rpm was different (5100 versus 5500). Anyway, thanks again
Tammy |
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#4
04-03-2009, 09:46 PM
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If you bought if off of P/Y ask if they'll trade it in if you bought it recently.
Mike
__________________
so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
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#5
04-04-2009, 12:12 AM
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The tachs need to be calibrated for either the 6 or the 8 cyl.
Internally there is a capacitor that changes value depending on the # of cylinders. It's an easy change for someone who knows some electronics and can solder. George
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"...out to my ol'55, I pulled away slowly, feeling so holy, god knows i was feeling alive"....written by Tom Wait from the Eagles' Live From The Forum |
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