Tach in-op
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New User
Joined: Jul 2002
Posts: 11
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From: Daytona Beach USA
Tach in-op
I tried a search, but nothing.
When the truck is cranking, it works fine, once it fires up, goes to zero. I have MSD6A and the motor is a 460. 1987 F150. What do I do to fix this problem.
I need a tach so I can judge my crusing RPM's on the highway, as the truck now has too much gear in it (3.55's/8.8") and I think it's turning 3500 or so around 80-90mph. (C6 tranny)
If I put a 2.73 or even a 3.08 in it, will my milage go up a bit?
I do like a drag race every now and then, but I think I prolly have the torque to handle the extra gear....any input?
When the truck is cranking, it works fine, once it fires up, goes to zero. I have MSD6A and the motor is a 460. 1987 F150. What do I do to fix this problem.
I need a tach so I can judge my crusing RPM's on the highway, as the truck now has too much gear in it (3.55's/8.8") and I think it's turning 3500 or so around 80-90mph. (C6 tranny)
If I put a 2.73 or even a 3.08 in it, will my milage go up a bit?
I do like a drag race every now and then, but I think I prolly have the torque to handle the extra gear....any input?
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Tach in-op
2.73s would be way to low, 3.08s would improve ur mileage but would kill you'r drag racing acceleration.
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster American Thunder Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.
Check out my Gallery for a look-see.
Then theres:
99' Mustang GT 4.6L
88' F-250 Heavyduty 4x4 351/c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 with a
3 spd column shifter. Weighs around 7,000lbs w. 65mph top speed, who wants to race me!
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster American Thunder Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Then theres:
99' Mustang GT 4.6L
88' F-250 Heavyduty 4x4 351/c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 with a
3 spd column shifter. Weighs around 7,000lbs w. 65mph top speed, who wants to race me!
Thread Starter
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New User
Joined: Jul 2002
Posts: 11
Likes: 0
From: Daytona Beach USA
Tach in-op
I didn't add that I am running a shorter tire than standard. Tire size is
Ft-245/60/15
rear-275/60/15
Perhaps I need a new set of wheels/tires as well
Anyone know if Lightning stuff will fit?
Ft-245/60/15
rear-275/60/15
Perhaps I need a new set of wheels/tires as well
Anyone know if Lightning stuff will fit?
Tuned
Joined: Aug 2002
Posts: 263
Likes: 0
From: USA
Tach in-op
Is your tach. factory or aftermarket? I haven't messed with the trucks, but I know on 5.0 mustangs with aftermarket ign. boxes and tach's you have to buy an adapter for the box. My friend was wondering why his Monster Tach kept shorting out, and then I read you have to buy an adapter to plug the tach into the box. Good way for them to get an extra $30 out of you. I'm not sure if this applies to you, but thought I'd through in my $.02.
