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tach vs. speed

 
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66gt



Joined: 12 Aug 2008
Posts: 187
Location: Ferndale,WA

PostPosted: Sun Jul 31, 2011 6:43 pm    Post subject: tach vs. speed Reply with quote

Hey everyone!

Its been forever since I've driven my MK1 Cortina Gt and today I was driving 50mph and noticed the tach was at around 4k...is this okay? 3.9 final..

Steve
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enfoprefect



Joined: 04 Feb 2009
Posts: 143
Location: Oklahoma

PostPosted: Mon Aug 01, 2011 7:23 am    Post subject: Reply with quote

Sure doesn't sound right.
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peteleo



Joined: 24 Aug 2008
Posts: 897
Location: San Mateo,California

PostPosted: Mon Aug 01, 2011 9:34 am    Post subject: Reply with quote

It's off by about 500 rpm. Scroll down to the technical discussion: Cortina GT Tach - June 20, 2009
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66gt



Joined: 12 Aug 2008
Posts: 187
Location: Ferndale,WA

PostPosted: Tue Aug 02, 2011 9:19 am    Post subject: Reply with quote

I knew it was off....thanks again Pete!
I'm glad your on this Forum!

Steve
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peteleo



Joined: 24 Aug 2008
Posts: 897
Location: San Mateo,California

PostPosted: Tue Aug 02, 2011 10:45 pm    Post subject: Reply with quote

Thanks, Steve. I checked the rpm reading on my MK1 GT at a true 50mph
( 53 mph on the speedo ) it read 3200 rpm. So it maybe a bit further off.
Either way it can be corrected.

Pete
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66gt



Joined: 12 Aug 2008
Posts: 187
Location: Ferndale,WA

PostPosted: Wed Aug 03, 2011 12:47 am    Post subject: Reply with quote

Now that gives me hope Pete!

Steve
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