SpeedyAndy Posted June 7, 2008 Share Posted June 7, 2008 hey all, i was just wondering as my mate has had a TT conversion from N/A but had to keep the 5 mannual gear box, i no if he wanted to increase BHP then he will have to upgrade the gear box to the 6 mannual speed gear box! but i was just wondering if you re-build the gear and set the radio different etc ( like you do on a engine to increase power)would the gear box be able to handle more power from the engine, has he has been told only to BHP up to 420 / 430 BPH has the gear box wouldn't be able to handle the power ?? has any one had this done before or done it them selfs ? Many Thanks Speedy Andy Quote Link to comment Share on other sites More sharing options...
Guigsy Posted June 7, 2008 Share Posted June 7, 2008 as far as i know 400-450 is about right. upgraded clutch though i think Quote Link to comment Share on other sites More sharing options...
SpeedyAndy Posted June 7, 2008 Author Share Posted June 7, 2008 yer he's been told to upgrade clutch to a racing one to be able to take it to what he pleases! but its just the gear box that i was wondering about ? Quote Link to comment Share on other sites More sharing options...
Jake Posted June 7, 2008 Share Posted June 7, 2008 if you re-build the gear and set the radio different etc ( like you do on a engine to increase power)Not sure what you mean there. You can't really set the ratios differently (presuming you meant ratio rather than radio) on these gearboxes, or any other common production car gearbox that I'm aware of. Also don't know what you mean about setting ratios/radio/gears differently in engines to gain power. Quote Link to comment Share on other sites More sharing options...
michel lane Posted June 7, 2008 Share Posted June 7, 2008 anything over 400lbs or torque the 5 speed box will go pop, believe me we had 2 in already. its not the hp you got to deal with , its the torque. Quote Link to comment Share on other sites More sharing options...
Havard Posted June 7, 2008 Share Posted June 7, 2008 The radio is not linked to the engine in anyway shape or form....!! Sorry! H. Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted June 7, 2008 Share Posted June 7, 2008 hey all, i was just wondering as my mate has had a TT conversion from N/A but had to keep the 5 mannual gear box, i no if he wanted to increase BHP then he will have to upgrade the gear box to the 6 mannual speed gear box! but i was just wondering if you re-build the gear and set the radio different etc ( like you do on a engine to increase power)would the gear box be able to handle more power from the engine, has he has been told only to BHP up to 420 / 430 BPH has the gear box wouldn't be able to handle the power ?? has any one had this done before or done it them selfs ? Many Thanks Speedy Andy I would just get a 6 speed box Andy... 1. Its purposed built for the job... 2. You will have a limited top speed with the 5 speed box because with the lesser gear, you will just be hitting your rev limiter and doing no favours for your engine... Quote Link to comment Share on other sites More sharing options...
bondango Posted June 7, 2008 Share Posted June 7, 2008 IF you can get an OS GIKEN gearset for the W58 (though i think only the R154 was available) then yes, you can rebuild it to take the power, but your looking at over 3K for the 5 speed set, cheaper going the 6 speed route unless your serious about using the a 5 speed close ratio setup and big power. Quote Link to comment Share on other sites More sharing options...
SpeedyAndy Posted June 7, 2008 Author Share Posted June 7, 2008 yes sorry i do mean ratio ( mistype error ) Many Thanks for your comments, i think it would be easyer just saving up for the 6 mannual gear box, i only asked as i didn't know and someone told me about it as they have re-built a gear box but not for a supra for a evo! Thanks again for advise! Andy Quote Link to comment Share on other sites More sharing options...
Scott Posted June 7, 2008 Share Posted June 7, 2008 Save up for the 6spd while waiting on the 5spd to go pop. I don't really think the 5spd boxes are worth much/anything so just tell him to enjoy the car until he can afford a 6spd. Can the final drive in the 5spd be changed? Quote Link to comment Share on other sites More sharing options...
SpeedyAndy Posted June 7, 2008 Author Share Posted June 7, 2008 im not to sure my self, espcially with the supra gear boxes! just that i no he wants to do alot to the supra but is limited untill the 6 mannaul gear box comes along! Quote Link to comment Share on other sites More sharing options...
Guigsy Posted June 7, 2008 Share Posted June 7, 2008 (edited) oops! Edited June 7, 2008 by Guigsy (see edit history) Quote Link to comment Share on other sites More sharing options...
Scott Posted June 7, 2008 Share Posted June 7, 2008 (edited) My BPU car kicks out just over 500ft/lb of torque. are you sure? Guys on here with singles are getting around 500. Stock is around 325lb-ft Edit, just did a search for Wez's car. His torque curve is one of the best for a street single. He is pushing 520lb-ft and 560bhp and you reckon you are pushing the same torque BPU? Must be a first. Edited June 7, 2008 by Scott (see edit history) Quote Link to comment Share on other sites More sharing options...
Guigsy Posted June 7, 2008 Share Posted June 7, 2008 The duy running the dyno was surprised aswell.. ill dig out the sheet.... oppps. no it was nm Ignore me Quote Link to comment Share on other sites More sharing options...
Scott Posted June 7, 2008 Share Posted June 7, 2008 The duy running the dyno was surprised aswell.. ill dig out the sheet.... oppps. no it was nm Ignore me Yup thats about right then 380ish Quote Link to comment Share on other sites More sharing options...
miko_supra Posted June 7, 2008 Share Posted June 7, 2008 hey all, i was just wondering as my mate has had a TT conversion from N/A but had to keep the 5 mannual gear box, i no if he wanted to increase BHP then he will have to upgrade the gear box to the 6 mannual speed gear box! but i was just wondering if you re-build the gear and set the radio different etc ( like you do on a engine to increase power)would the gear box be able to handle more power from the engine, has he has been told only to BHP up to 420 / 430 BPH has the gear box wouldn't be able to handle the power ?? has any one had this done before or done it them selfs ? Many Thanks Speedy Andy For god sakes man proof read what you write. Quote Link to comment Share on other sites More sharing options...
SpeedyAndy Posted June 7, 2008 Author Share Posted June 7, 2008 so its the torque he needs to be careful off with blowing the 5pd gear box? as it not really the BHP and is it right to only to take it up to 420 - 450 BHP before it best to have the 6sp gear box ? Quote Link to comment Share on other sites More sharing options...
Scott Posted June 7, 2008 Share Posted June 7, 2008 so its the torque he needs to be careful off with blowing the 5pd gear box? as it not really the BHP and is it right to only to take it up to 420 - 450 BHP before it best to have the 6sp gear box ? BHP doesn't matter, its the torque. The reason for the general rule of 450 is because, normally, you will be hitting around 400-450lb-ft of torque which will blow the box. If you had 10000bhp and only 200lb-ft of torque you would be fine Quote Link to comment Share on other sites More sharing options...
bromy Posted June 7, 2008 Share Posted June 7, 2008 I have been running a T61 at 0.9bar through the 5 speed for the last few years with no issues. Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted June 8, 2008 Share Posted June 8, 2008 I have been running a T61 at 0.9bar through the 5 speed for the last few years with no issues. How much ft - lb's of torque do you have on your Supe?? Quote Link to comment Share on other sites More sharing options...
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