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#1 |
Registered User
Join Date: May 2003
Location: MOORE, OK
Posts: 146
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I GOT THE TACH HOOKED UP ON MY TRUCK AND IT REALLY SUPRISED ME TO SEE HOW MANY RPM'S MY THESE TRUCKS TURN.
IT HAS A 307 ENG AND A THREE SPEED TRANNY, AND ON THE HIWAY IT WAS TURNING BETWEEN 3500-4000. DOES THIS SOUND RIGHT OR COULD THE TACHOMETER BE OFF? THANKS ![]() |
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#2 |
Senior Member
Join Date: Jan 2000
Location: Cincinnati, Ohio
Posts: 1,492
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What rearend gears do you have?
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#3 |
Try spinnin 4 rear tars
Join Date: Sep 2003
Location: Salt Lake City, Utah
Posts: 757
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well for a comparison, I have 3.08's, and I turn 3000 running ~80mph
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SWEET7T 1970 C10, 2wd, LB, 307/TH350/3.08. PS, PB |
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#4 |
Registered User
Join Date: May 2003
Location: MOORE, OK
Posts: 146
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I'M NOT SURE WHAT GEAR. IT IS A SHORT STEP SIDE PLANE JANE TRUCK
WITH NO A/C OR ANYTHING. WE PUT POWER STEERING ON IT. |
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#5 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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The truck probably has a 3:73 in it, but depending on the speed the tach could be off. The tachs are adjustable and with a reference tach, it is pretty easy to do.
Jim |
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#6 |
Registered User
Join Date: May 2003
Location: MOORE, OK
Posts: 146
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TACH IS ADJUSTABLE?
HOW DO YOU ADJUST IT? I'M GONNA PUT A TIMING LIGHT ON IT AND SEE IF IT IS OFF, BUT IF IT IS HOW DO YOU ADJUST IT?
THANKS |
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#7 |
Beer Power!!!!!!!!!!
Join Date: Nov 2003
Location: Nacogdoches, TX
Posts: 280
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That sounds right to me. I have the same set up in my all original truck and it screams at 70.
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Rather be fishin' |
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#8 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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If you look on the back of the tach there is a small piece of tape covering the adjustment screw. Just hook up a second tach, (known to be accurate and adjust your tach to match).
Jim |
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#9 |
Registered User
Join Date: May 2003
Location: MOORE, OK
Posts: 146
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I didn't know that. That is pretty cool. Thank you for the help!
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