Guest Mower_Racer Posted July 31, 2010 Share Posted July 31, 2010 Hi Guys Need to ask the experts a question. I am just beginning shoe horning a 4.0 litres v8 lexus engine into a 1971 Vauxhall Firenza. I am planning on using a Supra Gearbox, it has been done lots of times before in Aus, NZ and the USA. I have narrowed it down to one of two gearboxes. W58 or the R154. All the bits seem to be readily available. But which do you guys think is the best box? Which Models do they come from?? Hope you can help?? Jason Quote Link to comment Share on other sites More sharing options...
TonyP Posted July 31, 2010 Share Posted July 31, 2010 Weird first post and I have no idea I'm afraid but and And any pics? I love the shape of the firenza Quote Link to comment Share on other sites More sharing options...
Guigsy Posted July 31, 2010 Share Posted July 31, 2010 not 100% a w58 would take the torque of a v8 would it? they struggle with a put supras power Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 31, 2010 Share Posted July 31, 2010 Welcome and an interesting project. The W58 is the one, its been used in manual V8 conversions before. Comes from the Mk4 n/a amongst others Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted July 31, 2010 Share Posted July 31, 2010 W58 would be fine in my opinion. Aslong as the 1UZ stays NA then a W58 would take its torque, plus a firenza weighs next to nothing so not to much abuse on the trans. W58's struggle with bpu sup's but then look at what they have to deal with, 400+lb of torque in a 1.5-1.6ton car with big wheels. A stripped firenza with nice 15's on it will be a lot easier on it. Quote Link to comment Share on other sites More sharing options...
garethr Posted July 31, 2010 Share Posted July 31, 2010 (edited) Accepted wisdom among Aussie Soarer owners is that the W58 is fine for a stock 1UZ. R154 for forced induction. The W58 was used in the N/A Mk3 and Mk4 Supras. The R154 was used in the Mk3 Supra turbo (and in other turbo cars that you won't find being broken in the UK). I assume you've found Lextreme and v-eight.com Edited July 31, 2010 by garethr (see edit history) Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 31, 2010 Share Posted July 31, 2010 Gareth agrees with what Im saying, m making progress lol Quote Link to comment Share on other sites More sharing options...
Guest Mower_Racer Posted August 2, 2010 Share Posted August 2, 2010 Awesome guys thank you, that's what i wanted to know! I found the lextreme site, but you have to Pay money to get the answers!! Will do that, when i am a bit further in, i should imagine the wiring and fuel injection is going to be a nightmare!! But at this stage, just needed some basic info!! I will look for the other site. Photos, yes! How to put them one here????? mmmm i will try!! Quote Link to comment Share on other sites More sharing options...
Guest Mower_Racer Posted August 2, 2010 Share Posted August 2, 2010 http://http://i877.photobucket.com/albums/ab331/mowerracer74/027.jpg http://i877.photobucket.com/albums/ab331/mowerracer74/027.jpg Quote Link to comment Share on other sites More sharing options...
garethr Posted August 3, 2010 Share Posted August 3, 2010 ...I found the lextreme site, but you have to Pay money to get the answers!!...As far as I know, the Lextreme site takes voluntary donations. Registration for the forum is free. The other forum I mentioned is http://www.v-eight.com. One of the members (the founder?) sells CAD files for W58/R154/Tremec adaptors. Quote Link to comment Share on other sites More sharing options...
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