Hi Guys,
I went to check Brian Little's website to find info on the various speedo cogs. I recall someone saying lately that the link has changed, but could not find that post.
I have recently acquired a 4.11 diff and need to change the cog in my '83 ZX 5spd to match it.
Does anyone have the P/N? The new link to Brian's site would be great to have too.
Thanks!
Marty
Thanks Arne!
Marty
32703-78104 is what you're looking for. I don't believe the number shows on the Z car garage site.
2004 Ford Ranger EDGE Supercab
(@Moonpup: This one really is an EDGE!)
2005 Pontaic GTO
2010 Mercedes Benz C300 AMG Sportline (Wife's car)
2014 Kia Rio LX (Wife's daily driver)
Certified HVAC/MVAC Technician
The 20 to 23 tooth gear requires a different sleeve than the 16 to 19 tooth. Here's the entire list at Coutresy Nissan.
2004 Ford Ranger EDGE Supercab
(@Moonpup: This one really is an EDGE!)
2005 Pontaic GTO
2010 Mercedes Benz C300 AMG Sportline (Wife's car)
2014 Kia Rio LX (Wife's daily driver)
Certified HVAC/MVAC Technician
He say's that? So in Brian's opinion being a little off is better than being way off?Originally Posted by Marty Rogan
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2004 Ford Ranger EDGE Supercab
(@Moonpup: This one really is an EDGE!)
2005 Pontaic GTO
2010 Mercedes Benz C300 AMG Sportline (Wife's car)
2014 Kia Rio LX (Wife's daily driver)
Certified HVAC/MVAC Technician
If you're not using stock diameter tires, now is your chance to include that difference in your calculations too.
Cheers,
Brady
72 240Z, 3 x 40DCOE18, 6-1header, 2.5" exhaust, ZX 5-speed, 4.11 R180
83 Audi urQuattro
86 Audi 4000S quattro
91 Audi 200 quattro Avant
According to my calculations, you effectively have a 4.265:1 rear diff, taking your tire size into account. That's a 3.7% difference from 4.11:1, which means you'd be closer with a 21 tooth gear (pn 32703-86401).
Of course, all this assumes your speedo was accurate before you changed wheel/tire combo and diff!
Cheers,
Brady
72 240Z, 3 x 40DCOE18, 6-1header, 2.5" exhaust, ZX 5-speed, 4.11 R180
83 Audi urQuattro
86 Audi 4000S quattro
91 Audi 200 quattro Avant
If your speedo was already off, here's how to calculate another way. And it's probably a good idea to try this out anyways.
Head out on the highway where there are mile markers.
Drive an indicated 60MPH, which is 1 MPM (mile per minute) for exactly 2 miles.
Time the amount of time (we'll call it T) it takes to cover those 2 miles in seconds.
Your actual speed in MPM is 120/T.
So, take your existing speedo gear tooth count T/120.
Teeth(needed) = Teeth(actual) x T/120
Cheers,
Brady
72 240Z, 3 x 40DCOE18, 6-1header, 2.5" exhaust, ZX 5-speed, 4.11 R180
83 Audi urQuattro
86 Audi 4000S quattro
91 Audi 200 quattro Avant
I'm with you on the hibernation thing. Maybe I'll see my Z in May.....
You're welcome!
Cheers,
Brady
72 240Z, 3 x 40DCOE18, 6-1header, 2.5" exhaust, ZX 5-speed, 4.11 R180
83 Audi urQuattro
86 Audi 4000S quattro
91 Audi 200 quattro Avant
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