Question: 5.1 CWP Ratios

[Huggy444]

People running 5.1 CWPs, how do you find first gear and the gap between 3-4, 4-5?

Looking at the ratios etc it seems like first is rather short, and then there's still a fair gap between the higher gears (especially in a coilpack gbox).

Just looking for some advice on if its worth it, or if I should just go the whole hog and get the dog gear set from Hockley.

Alex

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[SuperUno]

4.92 from Matt H is spot on, a little low with very low profile 13” tyres, ideal with most tyre sizes. I would only use a 5.1 if running 14 or 15” wheels or knobblies.

 

[Huggy444]

4.92 from Matt H is spot on, a little low with very low profile 13” tyres, ideal with most tyre sizes. I would only use a 5.1 if running 14 or 15” wheels or knobblies.

Thanks

Are you running a coilpack (00+) or 98-00 gear set?


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[SuperUno]

98 1.0 gearset, would probably go for 1.3 gearset in the future as the ratios look a little better.

 

[Skinner_87]

People running 5.1 CWPs, how do you find first gear and the gap between 3-4, 4-5?

Looking at the ratios etc it seems like first is rather short, and then there's still a fair gap between the higher gears (especially in a coilpack gbox).

Just looking for some advice on if its worth it, or if I should just go the whole hog and get the dog gear set from Hockley.

Alex

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The only downside I find with the 5.1 is 1st is too short for sprints / hillclimbs – Hockleys ratio for 1st looks ideal – I did do a comparison for top theoretical top speed in each gear and the difference was nearly 10mph in 1st!

Though fitting the 5.1 does save about a £1k!

 

[Huggy444]

The only downside I find with the 5.1 is 1st is too short for sprints / hillclimbs – Hockleys ratio for 1st looks ideal – I did do a comparison for top theoretical top speed in each gear and the difference was nearly 10mph in 1st!

Though fitting the 5.1 does save about a £1k!

Yeah I've looked through the top speeds in ear gear, considering wheel size and rev limit etc first is just so short it'd only ever be used for launches - not a bad thing I suppose.

The dog ratios look perfect from Hockley, but the box costs the same as my car...



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[Marine Green k11]

If you know the ratios I came across a gearbox calculator online a while ago whilst deciding on gearsets for my other project, (thanks for the cable tied driveshaft Huggy444 ?), but it let's you enter in ratios of each gear, shift points, final drive ect ect and gives you both visual rpm drops and also numerical to closer identify differences, best bet would be have 2 of them open at once and enter in all the details for each box to view differences, then you can change the ratios to find what your ideal would be

 

[Marine Green k11]

Here's the link : https://www.blocklayer.com/rpm-gear.aspx

 

[Huggy444]

If you know the ratios I came across a gearbox calculator online a while ago whilst deciding on gearsets for my other project, (thanks for the cable tied driveshaft Huggy444 ), but it let's you enter in ratios of each gear, shift points, final drive ect ect and gives you both visual rpm drops and also numerical to closer identify differences, best bet would be have 2 of them open at once and enter in all the details for each box to view differences, then you can change the ratios to find what your ideal would be

Yeah been and looked through and compared ratios, hence my thoughts on 1st etc looking a bit short!

Ta for the idea anyway

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