Grim Reaper Posted May 14, 2013 Share Posted May 14, 2013 Is it possible to change the 6 speed ratios to give a better 6th gear ratio for motorways? Got a long trip around europe this year and motorway miles are a pain with 1:1 6th Link to comment Share on other sites More sharing options...
Johnty Lyons Posted May 14, 2013 Share Posted May 14, 2013 Change your diff ratio. Link to comment Share on other sites More sharing options...
Wrightpayne Posted May 14, 2013 Share Posted May 14, 2013 Change the diff ratio or stick a 5 speed in. Ian Link to comment Share on other sites More sharing options...
Grim Reaper Posted May 14, 2013 Author Share Posted May 14, 2013 Hmm, might start looking for a 3.14 CWP set. Link to comment Share on other sites More sharing options...
Garth Posted May 14, 2013 Share Posted May 14, 2013 As you may have guessed it is not possible to change the final drive on the six speed box!? Link to comment Share on other sites More sharing options...
Sim Posted May 14, 2013 Share Posted May 14, 2013 Change your tyre profile ? Link to comment Share on other sites More sharing options...
NoLimits Posted May 15, 2013 Share Posted May 15, 2013 You will be very lucky to find a 3.14 as the are THE ratio for the Busa Boys 😬 You will pay a huge premium for them IF and I'll say I'FF again you can find one. Hens teeth would be easier. However - I do have a 3.38 available Link to comment Share on other sites More sharing options...
Graham King Posted May 15, 2013 Share Posted May 15, 2013 As Sim implies, may be easier to change your wheels and tyres, what size are you currently running? Link to comment Share on other sites More sharing options...
sjmmarsh Posted May 15, 2013 Share Posted May 15, 2013 I used to think that my 7 was high revving, but have got used to it over time. However I have noticed that some of the newer superminis (Corsa, Fiesta and Mini) all rev pretty highly, with the Corsa revving the same as my Caterham (both in top). I presume this is something to do with EU5 efficiency requirements? Steve Link to comment Share on other sites More sharing options...
paul jacobs Posted May 15, 2013 Share Posted May 15, 2013 To be honest, I've always thought the ratios in the 6 speed box are wrong for road use, far to closely packed together and as has been said, a direct 1.1 6th gear is far too low for today's long distance driving, unless you like your engine revving its' nuts off for hour after hour? If you raise the back axle ratio, either by changing the diff. or putting larger diameter tyres on, you then raise first gear, so it becomes to long for slow traffic and even pulling away will need a bit more clutch slipping. Not good. So all in all, the ratios are wrong for today's torquey Duratecs [possibly Sigmas too, but I don't know much about them]. So many people get seduced by the number of gears and automatically think that if it's got six speeds it must be good - wrong. In my humble opinion, nothing beats a well modified 5 speed box, with a long first and second, then third fourth and fifth as standard. The change can also be improved and with the addition of a 'quick shift' lever, it is as good as anyone can want. That is exactly what I've done over the years, even on my CSR 260 [actually, particularly on the 260, if ever there was an engine that didn't need ultra close ratios, that is it!] There are always people who like shifting all the time, but the novelty wears off after a time, and you find yourself missing out a gear, what price 6 speeds then? Link to comment Share on other sites More sharing options...
Bradders Posted May 15, 2013 Share Posted May 15, 2013 Sorry for the highjack. Is it complex job putting a quick shift in Paul? Link to comment Share on other sites More sharing options...
Wrightpayne Posted May 15, 2013 Share Posted May 15, 2013 Bradders Three bolts once you have the tunnel top off. Basically a replacement gear stick with the pivot point moved to alter the ratio. Ian Link to comment Share on other sites More sharing options...
Mankee Posted May 15, 2013 Share Posted May 15, 2013 Quoting Bradders: Sorry for the highjack. Is it complex job putting a quick shift in Paul? Gear knob off, tunnel cover off, three bolts to remove lever and that's about it! Very simple if you've not got a handbrake or any other trim type stuff on the tunnel. There is a DiY method on DVA's website. I changed my old-style Sierra type to a rose-jointed sort, as well as moving the knob down a bit (ooer), and even without actually driving the car it feels a lot better. Link to comment Share on other sites More sharing options...
Bradders Posted May 15, 2013 Share Posted May 15, 2013 Thanks gents. Think I'll tell SWMBO that I'm off to the garage tonight to play with my knob 😬 Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted May 15, 2013 Share Posted May 15, 2013 Your gear leaver might well already be a quick shift... I'm pretty sure they're standard now - here. Link to comment Share on other sites More sharing options...
Bradders Posted May 15, 2013 Share Posted May 15, 2013 Ah right A call into CC to confirm then do you think? Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted May 15, 2013 Share Posted May 15, 2013 Just take a peek - if it has the rose joint rather than the nylon ball then it's the newer quickshift. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted May 15, 2013 Share Posted May 15, 2013 speak to Steve @ SPC, he was looking at different ratios for the 6 speeder , alternatively ask him to build you an alloy cased 5 speeder with his helical cluster and use the optional .82 5th. Another sevener did the later he retained his 3.62 final drive and it made for a cracking car with a tall cruising gear for his trips thro France. Link to comment Share on other sites More sharing options...
Grim Reaper Posted May 15, 2013 Author Share Posted May 15, 2013 I'm already running 15" 205 R888's so I don't think that there's much to be gained on the available tyres route. I get just under 4000rpm at 70, the engine will rev to 8500 (210bhp DVA'd K) and there's plenty of torque to play with but trying to keep the fuel consumption down on long runs is the aim. Currently getting around 30mpg on constant 70mph tankfuls Link to comment Share on other sites More sharing options...
Graham King Posted May 15, 2013 Share Posted May 15, 2013 GR, on the assumption you have an emerald, you could always speak to the 2 steve's and get a map developed specifically for motorway cruising and using the emerald 3-way map switch, I discussed this with them when they mapped mine (which sounds a very similar spec to yours). Graham. Link to comment Share on other sites More sharing options...
Grim Reaper Posted May 15, 2013 Author Share Posted May 15, 2013 I do have the K6 Emerald, with a 3 position map switch, linked up to a TechEdge WBO2 wideband controller and a Bosch LSU 4.9 lambda sensor. On the trip down to Stoneleigh at the beginning of the month I used the 'eco' setting where target AFR is set as around 14.7 at cruise, got there 178 miles with 10 litres left on the gauge, on the way home I used 'norm' setting where target AFR was set a bit richer and got home again with 13 litres on the gauge. Can't begin to explain that outcome. Link to comment Share on other sites More sharing options...
Phil B Posted May 15, 2013 Share Posted May 15, 2013 Downhill home ? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now