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The mkiv Supra Owners Club

question for n/a peps turbo or manual conversion


steve0
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i know il probaley get greif from the turbo boys but here goes im considering getting an aerotop supra still havent decided as there all autos and as turbos are nearly 14 grand for a good one which i havent got so im considering the n\a as i really want an aero top question is what would be cheaper convert to manual or a turbo conversion thats if i get one im not considering doing one straight away but maybe in a year or two depends on cash cheers folks

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well an aerotop is nice but theyre all auto. and the auto tranny in an na just wont hold on to high hp. the tt auto tranny can handle up to about 550hp i believe. so if u were to convert it to turbo the most the gearbox will hold will be up to is about 300bhp. and turbo kit plus tuning will add up a few grand (£4-5k). insurance will be ridiculous cos adding a turbo to an na is a big mod (prob few grand for insurance). in saying that at the end of the day u will be paying almost as much as a stock tt. if u want any more hp u will have to rebuild that auto tranny or put in a manual tranny which can hold that much hp.

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£2000 plus sound much nearer the mark. You need the ecu, wiring loom, propsahft, gear selector and stuff, blah blah, plus a love of tedious work to end up with a bastard car. Nowt to do with me but i can't see it's worth the effort.

 

;) No offence, it's coming from someone who converted his Skyline from auto to manual....

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actualy the car should work fine with the auto ecu. i think u mite be able to reuse that driveshaft or slightly modify it. there are a couple of members here who done the swap. a good gearbox specialist who at least know wot they're doing will be able to give u a quote for labour. i was quoted between £300-£400. parts wise will be difficult because there arent that many manual na supras and u mite have to source the parts from various breakers before u will have the complete list. are u sure u didn get ur prices from twin turbo members? cos the v160 getrag 6spd gearbox from tt will definitely cost more than ur w58 gearbox na. and the mkii and mkiii na supra also used the w58 gearbox and u can get a cheapy one from ebay for like £60.

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ye it was the turbo lot that told me slagged me for at as well cheeky swines i just really want an aero not too bothered about turbos low as i dont think me and over 300 bhp sounds right but im not really kin on autos i really like manuals alot better thats why i was thinking of converting the n\a to manual cheers for the advice folks ps i heard it would be around 14 for good one thats all as the cheaper ones would probaley need work done to them

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i think most items on the mkiii na will be compatible. but the shift fork is slightly shorter on the mkiii and also the shifter assembly is different. the mkiv has a shorter shifter than the mkiii. u mite need the mkiv bellhousing. everything else seems to be the same. even the clutch is compatible between the mkiii and mkiv. but remember to use the mkiii na tranny cos it has the w58 and not the turbo version cos that uses an r154 which will def not fit.

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You had it in one further up the posts basically your cheapest option is to get a write off with an intact drivetrain. Thats what I did and I was about to start the job when I realised that the engine needed more work doing to it due to the crash than I initially thought. For a manual conversion it is very advisable to change the ecu out as well (I think the nemesis guys did a conversion and kept the auto ecu and had nothing but problems with the park sensor and other auto sensors). A getrag box will set you back about £600 on its own. Then you are looking at shafts and other bits. If you manual up an N/A it won't be long before you want TT power.

 

You could do all that or spring £12.5k today and buy my TT aerotop with 395 BHP at the hubs allready and someone else having spent all the time and cash on it :)

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i would brain but not got 12 k sorry theres few jap scappies up here so they might be able to get an n\a manual mk 3 s ive seen a few on ebay and autotrader going for around 100 - 300 mostly failed mots and owners dont want to pay get fixed so if i get a n\a aero to change to manual will a mk3 do as a donor car then n\a one that is who would i get to swap the bits over not really bothered about turbos that much but thanks anyway

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