Garth Posted October 15, 2012 Share Posted October 15, 2012 Planning to swap/re-build my standard 5 speed box as part of some upgrades this winter. Will be running about 195bhp and plan to change 1st and 2nd to make them slightly longer and closer. Have a 3.62 diff (I am told!). Have been trying to get hold of SPC but think he may be on holiday? Also plan to speak to Road and Race? BGH Geartech's website is useful giving some 'standard' boxes with slightly different ratios. Should I speak to them - most of the posts I have read suggest either SPC or R&R? Cheers Garth Link to comment Share on other sites More sharing options...
Eugene Posted October 15, 2012 Share Posted October 15, 2012 I have a BGH in Eugene... A great box, with ideal ratios. Give them a call! 😬 😬 😬 Link to comment Share on other sites More sharing options...
The Pikey Posted October 15, 2012 Share Posted October 15, 2012 BGH are I think the only people that do heavy duty syncros for type 9's. I'd speak to them. jason Link to comment Share on other sites More sharing options...
michaelw Posted October 15, 2012 Share Posted October 15, 2012 Another for BGH, had one for 8 years and great ratios and strong. However I think Road and Race also do uprated Type 9's, might be worth a call. Michael. Link to comment Share on other sites More sharing options...
CageyH Posted October 15, 2012 Share Posted October 15, 2012 A happy SPC semi helical customer here. Link to comment Share on other sites More sharing options...
Grubbster Posted October 15, 2012 Share Posted October 15, 2012 SPC works well for me, this one - here Tracsport Type 9 rocket ratio helical gear kit . These gears have been developed with the Duratec user in mind. The gear tooth profiles are much larger than ford original spec and are similar to a typical S/cut gear.The amount of engine torque this gear kit can be used with is about the same as a typical s/cut gearset. The gears are cut to an angle of 25 degree's this means there is more than one tooth driving at any one time which is stronger than one at a time as in s/cut gearboxes,and also 95% quieter. They are also gear shaved after gear cutting to perfect the gear form. First and second gear are bored out larger than standard which saves weight. In other areas we have also lightened the gear train, the benefit of this is enhanced syncro life and a potential faster gear change. First and second gear are fitted with caged needle roller bearings to reduce friction. The gear ratios are as follows 1st 2.482 2nd 1.61 3rd 1.225 4th 1.1 5th .87 or .82 The .82 5th gear pair have an increased helix angle and finer pitch teeth for quieter cruising. I haven't compared it with anything other than a standard Type 9 but I am very pleased with it. Road and Race weren't interested in building me a 5 speed when I asked, it might depend on how busy they are. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted October 16, 2012 Share Posted October 16, 2012 Speak to Steve @ SPC absolute top guy and can offer upgrades on OE clusters, Tracsport set as above or Quaife. The set up Grubster has listed is perfect and bombproof, with many design features that are missed by other builders. Link to comment Share on other sites More sharing options...
Chris Cardwell Posted October 16, 2012 Share Posted October 16, 2012 Another BGH fan, there gearbox now takes more power with improved oil lubrication than when first designed. Has been tested in drag race cars with much more power Link to comment Share on other sites More sharing options...
Garth Posted October 16, 2012 Author Share Posted October 16, 2012 The Tracsport gear cluster sounds good, but does it only come in those ratios. Am not sure if first will be too long? I presume it is more expensive than the others?? Edited by - Garth on 16 Oct 2012 09:53:37 Link to comment Share on other sites More sharing options...
Paul Deslandes Posted October 16, 2012 Share Posted October 16, 2012 I think you'll find that those ratios are optimised for a 3.92 diff and 1st could be a bit long, although it does work out about the same as a Quaife pro box long first. Not great in traffic. Unless you're sure, it might be worth checking your diff ratio first as 3.92 was the standard and 3.62 used with 6-speed boxes with a direct 1:1 rather than overdrive 6th gear. You might find a metal tag on the diff with the ratio stamped on it. Mind you, that doesn't mean that the internals haven't been changed. Alternatively, jack the rear end up, rotate the road wheels lots of times (40), counting wheel and propshaft revs to calculate the ratio. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted October 16, 2012 Share Posted October 16, 2012 No problem with the ratios, I ran a 2.48 then changed to a 2.38 both with a 3.92 final drive and 205/60x13 rear tyres. Gives you circa 60mph in first ! Link to comment Share on other sites More sharing options...
Grubbster Posted October 16, 2012 Share Posted October 16, 2012 Mines using a 3.92 diff and yes it makes 60 in 1st if I rev it hard enough. It take a little getting used to when pulling away but it's never been a problem and I've not stalled it. Close ratio vs long ratio always provokes a bit of debate, personally I like mine the way it is, it suits how I use the car and the way the power is delivered. It looks like there are 2 great suppliers in SPC and BGH, I doubt if either would be a disappointment, I went with SPC because that's who I called to discuss the options and I just made the decision based on that conversation. To see how it looks in use there are a couple of 'Dunsfold Runway' videos on my channel where you can see the speedo and therefore the gearchange points - it accelerates a lot faster than it sounds because of the time spent in each gear IYSWIM. A 3.62 final drive might just make it a bit long though - get that confirmed if you can before making a choice. Link to comment Share on other sites More sharing options...
Garth Posted October 16, 2012 Author Share Posted October 16, 2012 I cannot find any tags or stamps on my diff. CC say they supplied me a 3.62 with my kit. If i jack it up and rotate a wheel I assume I need to stop the other wheel from spinning? - otherwise they will just rotate in opposite directions? Does the propshaft then rotate at double the speed?? Will use gearcalc to check what the revs etc will be like with a 3.92 diff too. Was planning to convert mine to a LSD, so could change ratios at the same time (except my budget was not going to stretch that far this winter!! Link to comment Share on other sites More sharing options...
raw Posted October 16, 2012 Share Posted October 16, 2012 Another happy SPC customer with a tracsport Duratec gear kit fitted in a Quaife alloy case. Steve is very knowledgeable but allow plenty of time if you talk to him 😬 Andrew Link to comment Share on other sites More sharing options...
Ian R Posted October 16, 2012 Share Posted October 16, 2012 A happy SPC semi helical customer here too, behind a 215BHP 170ft LB VX engined 7. Link to comment Share on other sites More sharing options...
Myles Posted October 17, 2012 Share Posted October 17, 2012 BGH here - despite SPC only being 10 miles down the road (I think) when I did the upgrade... Mines a heavy-duty sporting-close with tweaked 1st, 5th (and maybe 2nd) ratios. Also has the alloy top-plate with dipstick/filler. Rob G has a BGH too - has been using in his Duratech for some years (much more power/torque than my k-series!). I expect he'll be along soon. Link to comment Share on other sites More sharing options...
Garth Posted October 17, 2012 Author Share Posted October 17, 2012 Myles - did you choose BGH over SPC for any particular reason? 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