Tomyspeedy Posted January 5, 2016 Share Posted January 5, 2016 I love my supra (uk tt auto) but I feel like the car has got soo much more to give. So i've burried my head online and in some books plotting where to go with my car. But I can only find out soo much until I feel like some more owners opinions would be very helpful to myself and maybe others. I've seen the basic tuning guides online, such as: http://www.garagewhifbitz.co.uk/news/toyota-supratuning/ my question really is one to give me piece of mind. If I went to stage 2 in this guide how much am I reducing my supras life? Am I risking detonation on the stock ecu? Would I be best to go for a standalone ecu before going BPU? It will be awhile before I'd even consider upgrading turbos. I don't just want to throw all these bolt on mods to the car and end up drastically reducing its life. I understand that alot of this will be dependent on what I want from the car so i'm happy to explain that if it helps. This is by no means a specific technical question but i figured this would be the best place to discuss the technicalities. Thanks in advance Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted January 5, 2016 Share Posted January 5, 2016 I would do the bpu conversion first and see if that is enough for you, it's the best value performance with little risk if you keep it to 1.2 bar max Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted January 5, 2016 Share Posted January 5, 2016 BPU on a standard ecu is fine, you have a UK spec which means you can push the standard turbos up to 1.4bar is you wanted. You also have 550cc injectors which will support 500bhp if needed. The 2JZ engine is bullet proof! Its been known to withstand 750+bhp on standard internals. For what you're aiming for you need not worry! It's just a case of fitting the BPU package and enjoy, you'll love the kickdown on the auto at BPU Quote Link to comment Share on other sites More sharing options...
Tomyspeedy Posted January 5, 2016 Author Share Posted January 5, 2016 I would do the bpu conversion first and see if that is enough for you, it's the best value performance with little risk if you keep it to 1.2 bar max This is my current thinking, give it a try and see if it's enough. I'm after a 1000cc bike soon so thats in the back of my mind. So if I was to change plugs, install decats, fcd and boost controller would I be in danger of running the engine lean? I fully intent on keeping a smic. Is the fuel pump entirely necessary? Also, if running higher boost on the standard ecu would I provide some det prevention by running 98+ octane? Like wise am I doing any harm running 95 on a standard uk spec car? Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted January 5, 2016 Share Posted January 5, 2016 Fuel pump is needed, the bpu list is tried and tested, I would not run the uk turbos to 1.4 bar myself without fuel control or an afr gauge but that's just me I would also switch to 98 Ron fuel Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted January 5, 2016 Share Posted January 5, 2016 Fuel pump is needed, the bpu list is tried and tested, I would not run the uk turbos to 1.4 bar myself without fuel control or an afr gauge but that's just me I would also switch to 98 Ron fuel This. Quote Link to comment Share on other sites More sharing options...
Tomyspeedy Posted January 5, 2016 Author Share Posted January 5, 2016 awesome, so in terms of a fuel pump, new oem or go for a walbro? I'm presuming 255lph is more than enough for bpu? Is the stock pump on uk spec same as j spec? Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted January 5, 2016 Share Posted January 5, 2016 awesome, so in terms of a fuel pump, new oem or go for a walbro? I'm presuming 255lph is more than enough for bpu? Is the stock pump on uk spec same as j spec? Walbro 255lph pump is ideal for BPU. I believe the UK spec pump is different from j spec. Not 100% on that though. Quote Link to comment Share on other sites More sharing options...
Chris6t9 Posted January 5, 2016 Share Posted January 5, 2016 I love my supra (uk tt auto) but I feel like the car has got soo much more to give. So i've burried my head online and in some books plotting where to go with my car. But I can only find out soo much until I feel like some more owners opinions would be very helpful to myself and maybe others. I've seen the basic tuning guides online, such as: http://www.garagewhifbitz.co.uk/news/toyota-supratuning/ my question really is one to give me piece of mind. If I went to stage 2 in this guide how much am I reducing my supras life? Am I risking detonation on the stock ecu? Would I be best to go for a standalone ecu before going BPU? It will be awhile before I'd even consider upgrading turbos. I don't just want to throw all these bolt on mods to the car and end up drastically reducing its life. I understand that alot of this will be dependent on what I want from the car so i'm happy to explain that if it helps. This is by no means a specific technical question but i figured this would be the best place to discuss the technicalities. Thanks in advance Go bpu you will love it! Get yourself a auto box cooler if i were you too. I heard the main cause of the auto box failing before it should is because of heat. Quote Link to comment Share on other sites More sharing options...
Tomyspeedy Posted January 5, 2016 Author Share Posted January 5, 2016 Go bpu you will love it! Get yourself a auto box cooler if i were you too. I heard the main cause of the auto box failing before it should is because of heat. I've already been for a ride in a uk auto bpu'd and it was like a completely different car. Isn't there a stock auto box cooler fitted? Advice on which cooler to go for and best place to get it? Quote Link to comment Share on other sites More sharing options...
rider Posted January 5, 2016 Share Posted January 5, 2016 My BPU car has proved to be totally reliable with the original turbos still doing their job and an engine that purrs along. Only thing I have ever changed on the drivetrain in 16 years is the standard clutch at 107,000 miles. You find a lot of the high HP bespoke build Supras end up being broken for parts which generally will mean one less Supra out there. BPUs look stock (good for the insurers), push out around 340bhp at the wheels and you can buy in kits from the USA or the UK for not a lot, so its an affordable upgrade too especially if you do your own spannering. I did look into taking my car to the next level but the cost just didn't make it worthwhile in my opinion. I'd have rather sold the car and purchased a new GTR instead. Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted January 5, 2016 Share Posted January 5, 2016 If you buy second hand parts you could get most the bits (minus coolers) for a few hundred £££'s. Quote Link to comment Share on other sites More sharing options...
Tomyspeedy Posted January 5, 2016 Author Share Posted January 5, 2016 What should be my boost controller of choice? I really like the gain function of the greddy profec oled... Quote Link to comment Share on other sites More sharing options...
Josh42 Posted January 5, 2016 Share Posted January 5, 2016 What should be my boost controller of choice? I really like the gain function of the greddy profec oled... I'm using the OLED, great controller, intuitive, good quality display and loads of built in functionality. Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 5, 2016 Share Posted January 5, 2016 (edited) I think the uk fuel pump is man enough for bpu but will triple check for you. As others have said as long as you decat and limit the boost you should be fine. Decating can show up worn turbo seals though but you won't know until you try. You can decat the uk no not get instantly high boost so perhaps get that done asap (note small front/1st decat is uk/jap specific so make sure you get the right one! http://www.mkivsupra.net/vbb/showthread.php?302849-UK-Spec-fuel-pump-(Denso-)-questions&highlight=Denso+Fuel+pump Edited January 5, 2016 by Scooter (see edit history) Quote Link to comment Share on other sites More sharing options...
bignum Posted January 6, 2016 Share Posted January 6, 2016 Uk fuel pump is good for 500bhp, however if yours is the original and its covered 100k it may be worth replacing. Quote Link to comment Share on other sites More sharing options...
Tomyspeedy Posted January 6, 2016 Author Share Posted January 6, 2016 looks like you guys are defiantly right about the stock uk fuel pump, my question now is...if I don't replace it for bpu, how would I tell if it wasn't man enough? Install a fuel pressure gauge? I don't want to replace a perfectly fine pump, in the same light...I don't really want to downgrade my pump. Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted January 6, 2016 Share Posted January 6, 2016 Without a formal method of fuel control I would look to fit a quality AFR gauge to give you piece of mind, a walbro fuel pump replacement would be a must also if you are on original pump, remove the elements of risk Quote Link to comment Share on other sites More sharing options...
Tomyspeedy Posted January 6, 2016 Author Share Posted January 6, 2016 It doesn't seem worth taking any unnecessary risks. I'll add the walbro 255lph pump to my shopping list. Looking at the Aem wideband : http://www.garagewhifbitz.co.uk/aem-widebandgauge.html Sensor needs to be installed away from any water build up in the exhaust and close to the manifold? So to get the terminology clear in my head, it gets installed into the 1st decat pipe (short one), both decats making up the downpipe? Quote Link to comment Share on other sites More sharing options...
Sheefa Posted January 6, 2016 Share Posted January 6, 2016 As others have said, go BPU and experience that first which is a world apart from the stock supra. I'd also suggest looking at the Walbro485 pump instead if you think you may want more power in the future or the Bosch044. Both are good. AEM AFR gauge, reputable boost controller (Blitz, OLED etc) and the other bits and you're good to go. Quote Link to comment Share on other sites More sharing options...
Sheefa Posted January 6, 2016 Share Posted January 6, 2016 (edited) Re the AFR gauge I'm sure you will need to weld a bung into the decat and sensor and bung needs to be mounted downstream from turbo at least 10 degrees above horizontal to prevent crap/deposits from building up. This should come supplied in the kit. Go for decat that already has a bung welded, ideally. Edited January 6, 2016 by Sheefa (see edit history) Quote Link to comment Share on other sites More sharing options...
Tomyspeedy Posted January 6, 2016 Author Share Posted January 6, 2016 Aem wideband, greddy oled boost gauge and whifbitz 3" decats ordered. Just need to find a fuel pump as mines most likely original. Is it worth having a flexible section fabricated into the exhaust system? Quote Link to comment Share on other sites More sharing options...
TT Paul Posted January 9, 2016 Share Posted January 9, 2016 12v fuel pump mod and maybe a fuel damper by pass if uk spec has one easy mods to do to. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.