11-09-2017, 03:38 PM
(This post was last modified: 11-09-2017, 03:40 PM by Malcolm Parker.)
[quote='My Ulster rep has the 5.25 axle ratio, a 3 speed box with a high 2nd (the 'Andes' box), and 3.50 x 19" wheels. It is used for fast road use and has a similar spec engine to Steves car. On the road it goes almost everywhere in top gear including hills of around 10% gradient. Second gear copes with all but the very steepest hills. It will easily set off in second and pull away from a crawl in top. Gearing is critical but so is weight reduction. I am not a hillclimb expert but it seems that much depends on how high you dare rev your engine to in 2nd gear.
Unsurprisingly, I agree with what Alan says. My car which does OK but hasn't the most highly tuned engine out there has 3.50 x 19 tyres with a 5.25:1 CWP and 'fake' Ulster C/R 3 speed gearbox ratios. It's OK for most places but better for hillclimbs than sprints (and we do more of the former than the latter). Second gear is excellent and is the one used for most of the time on most of the hills we do. Only time I use top is on some sections of the longer hills on the Isle of Man. For sprints it's a bit different and I do have to use top. I don't, really, like to as gear changes cost time but it's either that, rolling off the throttle a little or revving the engine to places I don't want it to go to!! Snetterton Sprint next weekend will be something of a challenge in this respect!
Steve
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Unsurprisingly, I agree with what Alan says. My car which does OK but hasn't the most highly tuned engine out there has 3.50 x 19 tyres with a 5.25:1 CWP and 'fake' Ulster C/R 3 speed gearbox ratios. It's OK for most places but better for hillclimbs than sprints (and we do more of the former than the latter). Second gear is excellent and is the one used for most of the time on most of the hills we do. Only time I use top is on some sections of the longer hills on the Isle of Man. For sprints it's a bit different and I do have to use top. I don't, really, like to as gear changes cost time but it's either that, rolling off the throttle a little or revving the engine to places I don't want it to go to!! Snetterton Sprint next weekend will be something of a challenge in this respect!
Steve
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