Changing gear ratio
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brackie1
- Posts: 523
- Joined: Sat Dec 14, 2013 1:24 pm
- Your car is a: 1978 124 spider
- Location: Winston-Salem, NC
Changing gear ratio
Would anyone recommend or not changing the gear ratio of a '77 from the factory 4-30 to a 3-90. What would be the ramifications or advantage of doing this
Gene
North Carolina
North Carolina
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AndyVAS
- Patron 2018
- Posts: 141
- Joined: Thu May 18, 2017 9:42 am
- Your car is a: 1980 Fiat 124 Spider
Re: Changing gear ratio
I feel the 3.90 is the way to go. It helps out with highway driving by lowering the RPMs a bit. Stretches out all the gears a so you aren't constantly shifting while driving around town. With first gear being so crazy short it is nice to be able to drive through an intersection before shifting and not shift in the middle of the intersection.
Andy Phillips
Vick Auto - Technician, Performance Engine Builder & PFI Developer (with ITBs)
http://www.vickauto.com
Stock parts or Performance parts we've got what you need.
Vick Auto - Technician, Performance Engine Builder & PFI Developer (with ITBs)
http://www.vickauto.com
Stock parts or Performance parts we've got what you need.
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RRoller123
- Patron 2020
- Posts: 8179
- Joined: Sun Nov 13, 2011 2:04 pm
- Your car is a: 1980 FI SPIDER 2000
- Location: SAGAMORE BEACH, MA USA
Re: Changing gear ratio
+1. First is too Tall, and 5th is too Tall! Could get away with a three speed, just using 2nd, 3rd and 4th. 
Last edited by RRoller123 on Mon Jul 29, 2019 6:02 pm, edited 1 time in total.
'80 FI Spider 2000
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
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tima01864
- Patron 2021
- Posts: 702
- Joined: Thu Jan 12, 2012 8:01 pm
- Your car is a: 1983 FIAT Pininafarina Spider 2000
- Location: Wilmington, MA
Re: Changing gear ratio
A 40/10 was installed om my 83 2000, I swapped it back to 3/9 in the spring. I do notice a difference, 1st dosn't wind out and I have not used 5th around town. The car does feel more comfortable to drive if that is what you are after. I did alot of looking here, My concern was getting the wheels on true, One reason that I swapped it out.