Andyhannah Posted June 29, 2006 Share Posted June 29, 2006 is there anything i can do to upgrade my autobox to handle more power. i know the boostlogic box is probably the best way, ut is their anything that can be done to the standard one cheaply and will hold more power. andy Link to comment Share on other sites More sharing options...
JohnK Posted June 29, 2006 Share Posted June 29, 2006 There was a thread about upping the internal pressure recently, have a search. Link to comment Share on other sites More sharing options...
bedlam Posted June 29, 2006 Share Posted June 29, 2006 here ya go for our SOarer but will work the same on your car... http://www.lexusclub.co.uk/lsocautoboxmod.pdf Andy PS Oh and it is NOT my mod.it was done by a guy i know on the supraforums called Raven (Jared) ...we just did it over here and did the walkthrough . Link to comment Share on other sites More sharing options...
Christian Posted June 29, 2006 Share Posted June 29, 2006 The cheapest way to make the standard box hold more power is to do nothing. Why do you ask? Link to comment Share on other sites More sharing options...
Andyhannah Posted June 29, 2006 Author Share Posted June 29, 2006 i ask because im going for 700bhp Link to comment Share on other sites More sharing options...
Robert Posted June 29, 2006 Share Posted June 29, 2006 only thing to help would be fit some cooler/s to keep the heat down, i think 700bhp is a bit too much for the stock box tbh. Depends on the torque though as thats what kills the auto box with big power. Link to comment Share on other sites More sharing options...
Andyhannah Posted June 30, 2006 Author Share Posted June 30, 2006 which i why im asking how to upgrade to be honest. i dont want overkill lol. Link to comment Share on other sites More sharing options...
paul mac Posted June 30, 2006 Share Posted June 30, 2006 i dont want overkill lol. hmmm 700bhp on an auto best of luck with the lag mate Link to comment Share on other sites More sharing options...
paul mac Posted June 30, 2006 Share Posted June 30, 2006 seriously, you say you want an uprated box "cheap" but are wanting 700bhp (?) which is big money, i run 500rwhp and the box is in the twilight of its life, i have a boostlogic built box on the way, if you are willing to put the mullah into the engine surely you must consider the whole car as well, if you want cheap i would just have a second hand spare stock box ready to go when the one in the car goes and just keep swapping them, just upping the line pressure really isnt going to solve anything when your clutch packs are shot, what is the 700bhp for are you going drag racing if yes you could do with a better box than stock Link to comment Share on other sites More sharing options...
Gamer Posted June 30, 2006 Share Posted June 30, 2006 The stock box will never take 700, well it will but if it lasts 10 minutes your doing well. There is no avoiding it mate if you are looking at that sorta power you need to get a built box/Hi-stall or go manual. Link to comment Share on other sites More sharing options...
bedlam Posted July 1, 2006 Share Posted July 1, 2006 Like the others have said the stock box will NEVER run 700bhp..well maybe for a day or 2 ..you need to get the wallet out mate . Andy Link to comment Share on other sites More sharing options...
Christian Posted July 1, 2006 Share Posted July 1, 2006 I disagree, the stock box will run plenty of BHP. 700 may be on the high side but why not suck it & see? What's your current auto box worth? Yeah, not very much, so why spend good money replacing it when you don't need to. If you've got the money left after you have 700hp then upgrade the box. On the other hand, as soon as you start upping the power you MUST get a hi-stall torque converter to make the most of the new power levels. Link to comment Share on other sites More sharing options...
Gamer Posted July 1, 2006 Share Posted July 1, 2006 IMO, upgrading your cars power to 700 bhp and then not doing anything about the gearbox is silly. Why cut corners, especially with something as important as the gearbox. The stock box will break at those power levels, no question about it.... Link to comment Share on other sites More sharing options...
JohnK Posted July 1, 2006 Share Posted July 1, 2006 I disagree, the stock box will run plenty of BHP. 700 may be on the high side but why not suck it & see? What's your current auto box worth? Yeah, not very much, so why spend good money replacing it when you don't need to. If you've got the money left after you have 700hp then upgrade the box. On the other hand, as soon as you start upping the power you MUST get a hi-stall torque converter to make the most of the new power levels. I Disagree with you. Having experience in the whole autobox issue it WILL fail at a lot less that 700bhp. Link to comment Share on other sites More sharing options...
BURT Posted July 1, 2006 Share Posted July 1, 2006 ok. yes your stock box will break with that power... but why not like me test the box to see how far you can take it... if you are gonna have 700hp then you will need to get a bl box, but before you change them over.... wind the boost up and run the stock box just to see how much it will take. as there are so many pepole on here who are so happy to state that the stock auto box cant handle anymore than 500 bhp.... this we have already proven not to be the case as i myself have been running 550 for six months now, and yes it gets a hammering.. and i have had no issues yet... soon i will be winding up the boost all the wy on race fuel using the stock box to see how much it will take.., ye i know it will break eventually but i'm gonna do it all the same;) Link to comment Share on other sites More sharing options...
JohnK Posted July 1, 2006 Share Posted July 1, 2006 Burt, I think we have spoken on this issue before. My box was showing signs of stress at less than 500bhp. Mine was a reasonably low milage box with frequent oil changes. Link to comment Share on other sites More sharing options...
Kopite Posted July 1, 2006 Share Posted July 1, 2006 Wouldn't want to be in/behind a car when a box breaks though! Why risk it? Link to comment Share on other sites More sharing options...
BURT Posted July 1, 2006 Share Posted July 1, 2006 yes John we have, some can and some can't thats all fella.... but i will still be testing the box all the same... not on a public road of course, using race fuel etc.. i guess i'm just one of those curious types eh. like i said, the stock box will break at 700 but i'm willing to try and get 600+ out of one:eyebrows: Link to comment Share on other sites More sharing options...
paul mac Posted July 1, 2006 Share Posted July 1, 2006 yes John we have, some can and some can't thats all fella.... but i will still be testing the box all the same... not on a public road of course, using race fuel etc.. i guess i'm just one of those curious types eh. like i said, the stock box will break at 700 but i'm willing to try and get 600+ out of one:eyebrows: Burt i can understand your logic to a degree but failure of the stock box at high power figures is 100% inevitable, mine is running 500 rwhp and the full boost change ups are now becoming slower and slower i have given in and splashed the cash and gone for the BL, how far will you take pushing the standard box - until it fails catastrophicly and wipes out the engine with it, as gamer says i cannot understand modding the engine but leaving the tranny if you have a 700 bhp engine budget and a zero £ tranny budget i think a re-assesment of prioritys is called for, BTW could andyhannah explain the reasoning behind his "700bhp" figure when he obviously hasn't got the money for the tranny to hold this power - crazy - next he'll be posting asking for advice on cheap j-spec brakes to stop it lol Link to comment Share on other sites More sharing options...
BURT Posted July 2, 2006 Share Posted July 2, 2006 Burt i can understand your logic to a degree but failure of the stock box at high power figures is 100% inevitable, mine is running 500 rwhp and the full boost change ups are now becoming slower and slower i have given in and splashed the cash and gone for the BL, how far will you take pushing the standard box - until it fails catastrophicly and wipes out the engine with it, as gamer says i cannot understand modding the engine but leaving the tranny if you have a 700 bhp engine budget and a zero £ tranny budget i think a re-assesment of prioritys is called for, BTW could andyhannah explain the reasoning behind his "700bhp" figure when he obviously hasn't got the money for the tranny to hold this power - crazy - next he'll be posting asking for advice on cheap j-spec brakes to stop it lol oh no i wont push the box to that point of total breakdown and the Bl tranny will be on the workshop floor. ready to go in.. i would never risk my engine to prove a point;) i totally agree with you Paul.. building a 700 hp car without doing anything to the box is plane stupid, as i have said in both previous posts that it will break.. he will defo need to budget for a built box, not sure why he is building a car of this spec though for the road:think: surley if its for the strip a th400 box is defo the way to go... i would love to see the spec on this car as both you and i are aware that anymore than 500-600 is pointless on the road as it becomes unusable. Link to comment Share on other sites More sharing options...
Christian Posted July 2, 2006 Share Posted July 2, 2006 I Disagree with you. Having experience in the whole autobox issue it WILL fail at a lot less that 700bhp.We'll have to agree to disagree then. My experience is 550+hp for 20k miles & still had smooth quick gearchanges. It's sitting in my back garden now in case the upgraded one goes. Link to comment Share on other sites More sharing options...
stupra Posted July 2, 2006 Share Posted July 2, 2006 I'm only gonna have a cooler on my box after i've gone single, hopefully it wont go pop !. Link to comment Share on other sites More sharing options...
Gamer Posted July 2, 2006 Share Posted July 2, 2006 We'll have to agree to disagree then. My experience is 550+hp for 20k miles & still had smooth quick gearchanges. It's sitting in my back garden now in case the upgraded one goes. 550+ is manageable to some extent with the use of a hi-stall, aftermarket cooler (preferably with a fan), frequent fluid changes and taking it easy between the 1-2 shift. Link to comment Share on other sites More sharing options...
BURT Posted July 2, 2006 Share Posted July 2, 2006 not quite Jo.. you dont need a high stall... the bigger high stall you have the more heat you will generate in the box...( however any turbo bigger than a T61 will have to have a high stall) Link to comment Share on other sites More sharing options...
paul mac Posted July 2, 2006 Share Posted July 2, 2006 i would love to see the spec on this car as both you and i are aware that anymore than 500-600 is pointless on the road as it becomes unusable. well said that man totally agree Link to comment Share on other sites More sharing options...
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