adarmo Posted April 10, 2013 Share Posted April 10, 2013 Hi guys Long term lurker here keep meaning to buy a Supra but haven't got around to it yet. I'm looking to buy an Manual NA Supra with the intention of later dropping the Soarer V8 in (hope that goes down better here than V8 conversions do on the RX7 forums) I have searched but it's taking ages to find all the answers so I hope someone might just know it all (and tell me) Is the NA 6 speed exactly the same as the TT 6 speed (It appears so, V160 right ?) Other than the brakes and diff (and the box) is there any other benefit to buying an SZR facelift ? Am I correct that the diff is a small case but the brakes are the same as the TT ? Will a small case diff be OK with a 300bhp V8 ? If I decided to get some money out of the SZR by selling the 6 speed and replacing it with a 5 speed is it a simple swap of box, prop, flywheel ? Am I right in thinking I'd net around £1500 by doing this ? Is there a 5/6 gearbox / auto / TT / NA diff ratio info posted anywhere ? So I can work out what's best for a V8 ? Thanks Mark Quote Link to comment Share on other sites More sharing options...
Scooter Posted April 10, 2013 Share Posted April 10, 2013 Some answers, The box is the same as the TT's Diff ratios can be found here... http://mkiv.supras.org.nz/specs.htm The small diff will be fine with that power, all the later TT's had small diff cases. The brakes on a facelift SZ-R are not guaranteed to be the larger ones. not sure if benefits but other SZ-R diffs would be, no traction control and manually adjustable drivers seat. Quote Link to comment Share on other sites More sharing options...
Josh42 Posted April 10, 2013 Share Posted April 10, 2013 If you decide to sell the 6 speed, I'd PX you my 5 speed set up! Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted April 10, 2013 Share Posted April 10, 2013 If you decide to sell the 6 speed, I'd PX you my 5 speed set up! I bet you would Quote Link to comment Share on other sites More sharing options...
adarmo Posted April 10, 2013 Author Share Posted April 10, 2013 Thanks Scooter - very handy link. I've managed to figure out how the gear ratio calculator (old post on here) works too, looks like ideally I'd want to keep the 6 speed and get a TT ratio diff to get the cruising rpm down without raising the gearing too much in the lower gears. How agricultural is the 6 speed compared to the W58 ? Josh - If I buy it I'll bear you in mind - still trying to work out what base car makes the most sense - I'd rather get a pre 95 to avoid needing CATS Quote Link to comment Share on other sites More sharing options...
listy Posted April 10, 2013 Share Posted April 10, 2013 Why not buy a pre facelift NA which has a W58 box out the factory? Costs a few grand less than a facelift SZ-r, so saving money, rather than trying to get it back. Quote Link to comment Share on other sites More sharing options...
TheTurtleshead Posted April 10, 2013 Share Posted April 10, 2013 If I decided to get some money out of the SZR by selling the 6 speed and replacing it with a 5 speed is it a simple swap of box, prop, flywheel ? Am I right in thinking I'd net around £1500 by doing this ? You would have to be insane to even consider this! Why?! Surely it would be better to wait and save the £1500? The six speed gives you the peace of mind that a W58 running at near the limit of it's power would not provide. Quote Link to comment Share on other sites More sharing options...
Josh42 Posted April 10, 2013 Share Posted April 10, 2013 And pre 95 cars still have to have cats unfortunately! Quote Link to comment Share on other sites More sharing options...
listy Posted April 10, 2013 Share Posted April 10, 2013 And pre 95 cars still have to have cats unfortunately! What about pre 94? Isn't hat when the cat laws came in? So a 93 technically wouldn't require cats? Quote Link to comment Share on other sites More sharing options...
Josh42 Posted April 10, 2013 Share Posted April 10, 2013 Nope, cat laws came in 1991/1992 so all MKIV's should require cats. Although correct me if I'm wrong! Quote Link to comment Share on other sites More sharing options...
james_cbr Posted April 10, 2013 Share Posted April 10, 2013 Nope, cat laws came in 1991/1992 so all MKIV's should require cats. Although correct me if I'm wrong! this is right Quote Link to comment Share on other sites More sharing options...
listy Posted April 10, 2013 Share Posted April 10, 2013 Nope, cat laws came in 1991/1992 so all MKIV's should require cats. Although correct me if I'm wrong! I don't know. I always thought it was 94. Mine has a cat. Its in the garage. In a box. Under four other boxes Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted April 10, 2013 Share Posted April 10, 2013 I thought it was more to do with the 2jzge not being recognized by vosa. Quote Link to comment Share on other sites More sharing options...
adarmo Posted April 10, 2013 Author Share Posted April 10, 2013 I'm sick of looking and don't want silver or white and there's an SZR nearby. It also has the better: clutch, diff and brakes I can afford £1500 but at the same time if it's not as nice to use as the W58 then why have it ? Also a V8 shouldn't really need 6 gears and shouldn't break the W58. AFAIK imports pre 95 can get away without CATS as VOSA don't have them specifically listed - certainly this is true of import MX5s. Although they are sold as Eunos Roadsters which may be why they get exemption as their model name is different - so it may not apply to Supras Quote Link to comment Share on other sites More sharing options...
Tyson Posted April 10, 2013 Share Posted April 10, 2013 I'm sick of looking and don't want silver or white and there's an SZR nearby. It also has the better: clutch, diff and brakes I can afford £1500 but at the same time if it's not as nice to use as the W58 then why have it ? Also a V8 shouldn't really need 6 gears and shouldn't break the W58. AFAIK imports pre 95 can get away without CATS as VOSA don't have them specifically listed - certainly this is true of import MX5s. Although they are sold as Eunos Roadsters which may be why they get exemption as their model name is different - so it may not apply to Supras The only people who get away with as said above is NA's as they don't exist in the database. Everyone else need a feline in the drainpipe But there are friendly test centres all around the country sympethetic to our cause Quote Link to comment Share on other sites More sharing options...
straightsix Posted April 11, 2013 Share Posted April 11, 2013 I had some 'issues' when I MOT'd the V8 Supra but was told (by VOSA) that a non cat emissions test must be done on an engine aged 05/1992 and before. If you do an engine swap to a later engine, the emissions test will be based on that so cats would be needed. My car was a 1994. I ran a 1996 LS400 lump (to benefit the lower mileage engine) with 1992 Soarer intake and ECU. As the emissions are ECU controlled, this decided the test. I did have trouble getting one place to MOT my V8 but after a phone call to VOSA to clear things up I took it elsewhere and passed no problem. Obviously, if you have an engine not in the database (ie. a 2JZGE) then the test should default to a non cat test - but a 1UZFE, 2UZFE and 3UZFE are all in the database and will be tested for cats. Quote Link to comment Share on other sites More sharing options...
Fly Posted April 11, 2013 Share Posted April 11, 2013 just to question. Are you positive your SZR is a v160 and not a v161 as mine is a v161. not that theres much difference Quote Link to comment Share on other sites More sharing options...
adarmo Posted April 11, 2013 Author Share Posted April 11, 2013 Tyson - yes mine would be an NA. Albeit then with a 1UZ - which according to straightsix would be back within the regs - I already have the donor and it's a 93 Fly - no I'm not sure at all Quote Link to comment Share on other sites More sharing options...
SPG Posted April 11, 2013 Share Posted April 11, 2013 Fly is correct with the V161 being the only 6-speed which was installed by Toyota from the factory, this SZ-R you speak of will also come with a small case A02B diff (found in auto TT). Quote Link to comment Share on other sites More sharing options...
garethr Posted April 12, 2013 Share Posted April 12, 2013 (edited) And pre 95 cars still have to have cats unfortunately!Not if you use the stronger early (1991/2) Soarer 1UZ. The emissions test is based on whichever is earlier, engine or chassis. There are plenty of V8s in Australia and the USA running the W58. Check Club Lexus and the Australian Soarer forums (ALSC and Soarer Central). Since you have to do a conversion anyway, you could also consider the 6-speed out of a 350Z (preferably the later box - code "CD009"). Edited April 12, 2013 by garethr (see edit history) Quote Link to comment Share on other sites More sharing options...
adarmo Posted April 12, 2013 Author Share Posted April 12, 2013 (edited) Thanks Edited April 17, 2013 by adarmo (see edit history) Quote Link to comment Share on other sites More sharing options...
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