Guest suprafurious Posted February 25, 2016 Share Posted February 25, 2016 I guest i post this here as i going with gyroDrift I've recently just booked and payed the deposit for the conversion at gyrodrift, hoping they should be ready for my car in a week or two. Ggearbox is E46 m3 6 speed manual total: £2800 / they do twin plate cluch +£550 which includes : adaptor plate flywheel 3 peice clutch kit custom prop custom selector custom gearbox mount speedo conversion kit labour I will do an upgate on this when i know more. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted February 25, 2016 Share Posted February 25, 2016 I guest i post this here as i going with gyroDrift I've recently just booked and payed the deposit for the conversion at gyrodrift, hoping they should be ready for my car in a week or two. Ggearbox is E46 m3 6 speed manual total: £2800 / they do twin plate cluch +£550 which includes : adaptor plate flywheel 3 peice clutch kit custom prop custom selector custom gearbox mount speedo conversion kit labour I will do an upgate on this when i know more. In for updates! Quote Link to comment Share on other sites More sharing options...
ashloys Posted February 26, 2016 Share Posted February 26, 2016 Will be cool to see this finished! Quote Link to comment Share on other sites More sharing options...
eival Posted March 15, 2016 Share Posted March 15, 2016 Any update ? I'm thinking about this conversion too ! Quote Link to comment Share on other sites More sharing options...
Wez Posted March 15, 2016 Share Posted March 15, 2016 In for updates Quote Link to comment Share on other sites More sharing options...
Jam127 Posted March 15, 2016 Share Posted March 15, 2016 Marcin mucha in dundee (mac motorsport) should be able to help with this! Tell him i sent ya hes done many bmw box conversions. Does all sorts of work rwd style, he can stick a 2jz in almost any rwd car, i know its not the hardest thing in the world but he definitely has alot of experience in doing so.. Maybe a chat with him could help you. Quote Link to comment Share on other sites More sharing options...
Bio73 Posted March 15, 2016 Share Posted March 15, 2016 Ooh just had a cheeky read and very interesting stuff. Would like to see how the m3 box compares to the supra box. Can they handle comparable levels of power? And 330d box? Really that bomb proof! That's impressive if they are! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 17, 2016 Share Posted March 17, 2016 They don't! 2.47 on 330d vs 3.6 on the supra big case diff. They're fine if you like doing a ton at 2k and not having the power to pull the skin off a rice pudding in anything other than 1st. I just revisited this thread and realised you have this the wrong way round. A 330D gearbox mated to even the lowest ratio Supra diff would be the equivalent of having the V160 without 6th gear. It would be revving like hell at a given road speed. Quote Link to comment Share on other sites More sharing options...
Hitbox Junkie Posted March 17, 2016 Share Posted March 17, 2016 I just revisited this thread and realised you have this the wrong way round. A 330D gearbox mated to even the lowest ratio Supra diff would be the equivalent of having the V160 without 6th gear. It would be revving like hell at a given road speed. Could you not just put a different diff in that would be well suited to the boxes ratios? Quote Link to comment Share on other sites More sharing options...
Wez Posted March 17, 2016 Share Posted March 17, 2016 I just revisited this thread and realised you have this the wrong way round. A 330D gearbox mated to even the lowest ratio Supra diff would be the equivalent of having the V160 without 6th gear. It would be revving like hell at a given road speed. Would this be better for a track car where the stock top speed is well over the top for most circuits? Quote Link to comment Share on other sites More sharing options...
David P Posted March 17, 2016 Share Posted March 17, 2016 (edited) Could you not just put a different diff in that would be well suited to the boxes ratios? "just" http://www.ebay.com/itm/Driveshaft-Shop-To9-M1-Conversion-Kit-fit-Toyota-Supra-94-14-6-Speed-Manual-/131095931575?hash=item1e85ed2ab7:g:TJoAAOSw8d9Uz4ko&vxp=mtr Edited March 17, 2016 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 17, 2016 Share Posted March 17, 2016 Even the lowest ratio JZA80 diff is too high for that box in a road car. Wez: You would need to do the calcs based on tyre circumference, gearbox ratios and diff ratio, versus desired max engine RPM, and see if the top gear gave a suitably high top speed for wherever. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 17, 2016 Share Posted March 17, 2016 "just" Quite.... Where's the gaffer tape? Quote Link to comment Share on other sites More sharing options...
Wez Posted March 17, 2016 Share Posted March 17, 2016 Wez: You would need to do the calcs based on tyre circumference, gearbox ratios and diff ratio, versus desired max engine RPM, and see if the top gear gave a suitably high top speed for wherever. Stock MKIV 17" tyre sizes, large 6 speed diff or small NA auto diff, as for RPM I am guessing 5000rpm for the 3UZ-FE Quote Link to comment Share on other sites More sharing options...
David P Posted March 17, 2016 Share Posted March 17, 2016 (edited) How much are the eggs? Try this. http://www.mkivsupra.net/vbb/showthread.php?225050-Supra-specific-gear-diff-ratio-and-tyre-size-calculator Edited March 17, 2016 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
David P Posted March 17, 2016 Share Posted March 17, 2016 Even the lowest ratio JZA80 diff is too high for that box in a road car. Maybe your hole in this market is to knock up a kit that fits a BMW diff into a Supra? Quote Link to comment Share on other sites More sharing options...
Big Supes Posted March 17, 2016 Share Posted March 17, 2016 There are plenty of BMW 420g gearboxes out there. I don't know why someone would consider the 330d gearbox over it, apart from the price difference. Quote Link to comment Share on other sites More sharing options...
Josh42 Posted March 17, 2016 Share Posted March 17, 2016 What diff will you be using Adam? Quote Link to comment Share on other sites More sharing options...
Wez Posted March 18, 2016 Share Posted March 18, 2016 Try this. http://www.mkivsupra.net/vbb/showthread.php?225050-Supra-specific-gear-diff-ratio-and-tyre-size-calculator Perfect thanks Using some figures from http://www.bokchoys.com/differential/GearRatios.htm there isnt much in it at all. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted March 18, 2016 Share Posted March 18, 2016 What diff will you be using Adam? UK large case LSD. 1st and 2nd might be a bit savage, but it's all good fun. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted March 18, 2016 Share Posted March 18, 2016 After investigating, I opted for the 3.2 SMG 420g as it can be easily converted to manual. It made sense going this route as the gearbox would have had less abused having the ECU in charge of the gear changes in it's former life. Quote Link to comment Share on other sites More sharing options...
Josh42 Posted March 18, 2016 Share Posted March 18, 2016 UK large case LSD. 1st and 2nd might be a bit savage, but it's all good fun. Is that a manual or auto diff dude? Sounds interesting:) Quote Link to comment Share on other sites More sharing options...
Big Supes Posted March 18, 2016 Share Posted March 18, 2016 Auto diff from mine buddy. Quote Link to comment Share on other sites More sharing options...
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