L6 to v8 tachometer conversion
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L6 to v8 tachometer conversion
Recently swaped my 351 in and got it running good. I posted before I got the engine and was told the actual tach is the same but there's a wiring change. I've looked through all wiring diagrams available to me and can't find the change.
Is there a write up or any information on were this wiring change is by chance?
Is there a write up or any information on were this wiring change is by chance?
Tuned
Joined: Jun 2015
Posts: 354
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From: Winchester, KY,USA
I swapped the 300 six with a 351 earlier this year into my '95 F150; prior to the swap I had swapped the standard no tach instrument cluster with a '95 Lightning 120 mph cluster with tach. It worked fine with my six then and now with the 351 swap, it still works and I didn't have to do any rewire.....
Laughing Gas
Joined: Feb 2016
Posts: 909
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I swapped the 300 six with a 351 earlier this year into my '95 F150; prior to the swap I had swapped the standard no tach instrument cluster with a '95 Lightning 120 mph cluster with tach. It worked fine with my six then and now with the 351 swap, it still works and I didn't have to do any rewire.....
Fleet Owner
Joined: Aug 2005
Posts: 23,668
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From: Easton,Ks
Recently swaped my 351 in and got it running good. I posted before I got the engine and was told the actual tach is the same but there's a wiring change. I've looked through all wiring diagrams available to me and can't find the change.
Is there a write up or any information on were this wiring change is by chance?
Is there a write up or any information on were this wiring change is by chance?
This is grounded (jumped) at C250 pin #7 to pin #10.
You did not state the year so I will post for a 1992 F-series.
Attachment 283422
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Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
The diagrams below are for a 1990 but a 1991 should be the same.
Attachment 284304
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Laughing Gas
Joined: Dec 2005
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From: Laurel, MS
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I forgot to mention but it is 1990! My cluster is in good shape short of a random oil pressure wiggle, more so when my headlights are on. Thanks for the info! I'm probably gonna get a hei plug so I can get that done soon!
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