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Re: Flat Spot
Posted: Wed May 13, 2020 5:34 pm
by LORENZO73
MarinaCoupe wrote: Wed May 13, 2020 3:20 pm
Hi Renzo,
I have checked your teeth count and recalculated the gear ratios with the aid of a spreadsheet. Initially I got the same answers as David Painter. These are clearly wrong. However, I think that you have written down the teeth count for the second and third gear Mainshaft and layshaft the wrong way round, so if you write
Second gear as Laygear 21 and Mainshaft 26 then the calculation comes out exactly right at 1.92:1
Equally for third gear as Laygear 25 and Mainshaft 21 then the calculation comes out exactly right at 1.31:1
So this is a 1.8 gearbox - its an easy mistake to make.
Gear Ratio Calculations.png
Hi chris, and david,
Many thanks for help, i am so happy that i know more, about my car.
Next step, what do you thing chris?
Re: Flat Spot
Posted: Wed May 13, 2020 9:29 pm
by locost_bryan
Looks like Renzo just needs to get the correct speedo drive gear for the 3.63 axle.
Could be useful to have a chart pinned in the tech thread that lists the gearbox and diff stuff all together - the gear tooth counts and ratios, the standard combinations, rpm vs speed for standard tyres, speedo drive gears, etc.
Re: Flat Spot
Posted: Wed May 13, 2020 10:08 pm
by david painter
Chris and myself have spent a long time sorting them out his spread sheet is good I have learnt a lot myself while working this one out spent ages looking at part numbers and cross references
Dave
Re: Flat Spot
Posted: Wed May 13, 2020 11:04 pm
by locost_bryan
Would be good to pin it in a thread in the tech section for future reference.
Re: Flat Spot
Posted: Thu May 21, 2020 2:55 pm
by LORENZO73
Speedo and reefs now ok , with the gear of 20 teeth that he send me chris, many thanks .She comes like an original 75kpm with 2500 rpm on the fourth gear.
So now the difference is camshaft for much power.
Renzo
Re: Flat Spot
Posted: Thu May 21, 2020 4:22 pm
by david painter
Just run Calculations actual speed 46.60 MPH equivalent Calculated Speed on 3.63 diff with 155r13 tyres is 46.64 MPH so Speedo now reads Spot on you should be well happy now
Dave
Re: Flat Spot
Posted: Fri May 22, 2020 2:35 pm
by LORENZO73
Yes David, i am very happy , because i know that my marina have diff and gearbox for 1.8.
The difference that she have is camshaft, i would like to tell, you and chris, big thanks for help to change it.
Renzo
Re: Flat Spot
Posted: Sun Jun 28, 2020 10:45 am
by LORENZO73
. I put the revolution rims, and I lower it 2 inch. Renzo
Re: Flat Spot
Posted: Sun Jun 28, 2020 10:49 am
by JoshWard
That looks great!
Re: Flat Spot
Posted: Sun Jun 28, 2020 8:10 pm
by LORENZO73
Re: Flat Spot
Posted: Sun Jun 28, 2020 9:55 pm
by PHUQ
Liking that a lot Renzo, very cool.
Re: Flat Spot
Posted: Sun Jun 28, 2020 10:59 pm
by locost_bryan
Nice
Re: Flat Spot
Posted: Sun Jun 28, 2020 11:50 pm
by Gee tc
LORENZO73 wrote: Sun Jun 28, 2020 10:45 am
40F3B58F-7207-4B9E-9BB6-59876688B070.jpeg. I put the revolution rims, and I lower it 2 inch. Renzo
I remember seeing possibly this car just outside Valetta back in 2015
I was on a tour bus so didn't have time to snap it.
If it's the same one... it looked immaculate!
Re: Flat Spot
Posted: Tue Jun 30, 2020 9:05 am
by SLOW ITAL
looking very good Renzo...Gil
Re: Flat Spot
Posted: Thu Jul 02, 2020 9:57 am
by Kilroy
