(BPU(TM) is typically a trademark of SupraStore.com)
Basic Performance Upgrades. These are the modifications that have confirmed to present the best HP-to-$$$ ratio.
What does the + mean when somebody says BPU(TM)+?
That stands for any extra energy producing modifications other than the simple BPU(TM) modifications. Cam Gears and under-drive pulleys, the second “+” refers to a Fuel controller, ECU upgrade, etc. For instance, a Supra with the BPU(TM) modifications, plus a front-mount intercooler, would be referred to as BPU(TM)+. If you added cam gears to that, it will be BPU(TM)++, and so on. Then it is referred to as APU, advanced performance upgrades. This designation fairly very much covers each and every modification that may be performed.
I propose beginning with raising the boost of the stock turbos to roughly 18psi. This may need a quality increase gauge as well as a boost cut eliminator (GReddy BCC). After those modifications are completed, it could be a logical next step to install the Down Pipe and Cat-Back Exhaust at the very same time.
What do all the different “Free Mods” do?
You’ll find a lot of distinctive “free mods” for the Supra TT. I will cover just several of them here. The ones I will cover fall into three categories, boost control, EGR disabling, and TTC or True Twin Conversion.
Three of the increase control mods are: Bleeder-T Mod, Clamp Mod, and also the VSV Bypass Mod. Each of these modifications raise increase levels devoid of the use of a boost controller. But you must maintain a close eye in your enhance gauge, and ensure they are not permitting the turbos to increase too high (18psi is truly a safe level).
The subsequent mods, are the true twin conversion mods (or TTC). This modification disables the Sequential twin turbo operation, and causes the turbos to run constantly in parallel (both on at the exact same time). Two types of the TTC mod are, the classic TTC mod which consists of 2 methods, wiring the actuators, or installing a one way valve, and the Electronic TTC mod (ETTC).
The final mod I will talk about will be the EGR mod. This disables the Exhaust Gas Recirculation system, which is meant for emissions, and therefore, this modification is for off-road use only. This mod is supposed to avoid the super heating of the amount 5 and 6 cylinders, which may well cause burnt valves.
How considerably energy will my vehicle make at BPU(TM)?
Most BPU(TM)-only Supra Twin Turbos, dyno in between 370 and 410 horsepower at the rear wheels. This is ordinarily achieved with moderate temperatures, a reset ECU (to erase anything bad the ECU may perhaps have learned), and often just a little bit of high-octane un-leaded race fuel. On the street, energy is going to be reduced, especially in poor weather, but at the least 90 percent of the power ought to be retained.
What sort of 1/4 mile ETs and trap speeds must I run at BPU(TM)-only?
It varies WIDELY depending on driver skill. As well as track conditions, elevation above sea level, ambient temperatures, humidity, and pre-race preparation. But most fall between 12.3 to 12.9 ets with 112 to 119mph trap speeds on street tires. Times can drop properly into the 11s with drag radials, a great driver, and excellent conditions, at the same time as appropriate pre-race preparation.
What is a BPU(TM)’d Supra TT’s top speed?
Once the speed-limiter is disabled, by pulling the “TRAC” fuse of course.
If the auto is maintained properly, plus the vehicle is treated with some respect for the components, you should preserve substantially of the power train’s life. Which thinking about the fact that the Supra is by far one of the most dependable and durable sports cars, it’s going to final longer than most properly maintained STOCK sports cars. It will much more than most likely not final significantly longer than 8-10k miles as soon as at BPU(TM). If your stock clutch has high mileage on it, or is already starting to slip, you’ll have to have to strategy on a brand new high-performance clutch. Also the stock turbos will likely be subject to a somewhat shortened life span (how short will depend on how you drive and sustain the car, also as just how much enhance you’ll run)
What’s the reliability of a 600hp Supra Turbo?
The stock 2JZ-GTE engine must hold up fairly properly to this power level. Just how lengthy depends on maintenance, and how difficult you drive it, and how often. But typically Supras can go for years at this energy level. The transmission reliability will depend on whether or not it is an Automatic or Manual. A stock automatic will not hold this a lot power, a built transmission will be required, and it is reliability will depend on it is design and construction. The 6spd Manual must hold up just fine, as well as the rear differential and axles.
The only actual reliability concerns at these low energy levels would surround the actual modifications you perform. Basically a set-up that is either VERY properly concieved, or utilizes OE components as significantly as possible, without more than burdening them, would posses *near* stock reliability.
What are the power limits of the different factory components (Differential, Transmission, Motor, etc.)?
There have genuinely not been sufficient failures to really pin point a limit for the a variety of power-train components. The motor could fail at factory power levels if it was running dangerously lean. But of course at these power levels, if the engine just isn’t set-up and tuned properly, it’s literally a bomb waiting to go off, nonetheless this could be just as accurate with a built motor. Some owners have pushed their stock internals to the limit and have nicely exceeded 800rwhp, as properly as approached 900rwhp. I still do not comprehend how such an over built motor produced it past the bean counters at Toyota Corporate.
Even driven hard, the Getrag will need to hold up reasonably properly with 700RWHP. If you treat it with some respect, it need to be able to deal with about 800RWHP or more, even though terrific care and respect will need to have to be practiced at those levels.
So I don’t have significantly info on their failure limits. On street tires, it would be nearly impossible to break any of these components at ANY power level. The tires would spin prior to they would place the driveline beneath that sort of strain. The tires act sort of like a circuit breaker. If you run drag slicks, this doesn’t hold true of course, but they’ve confirmed themselves to be 10 and even 9 second capable.
Will drivability, interior noise levels, and low-end power be adversely affected with the BPU(TM) mods?
Some will make it far louder; some will actually make it quieter. But most are just slightly bit louder than stock. But the added dBs are also combined having a MUCH sweeter exhaust note, so it’s definitely worth it. So low-end energy and response is significantly improved more than stock.
Will emissions be adversely affected by the BPU(TM) mods?
If you run without having catalytic converters, you happen to be carrying out so at your own risk, and you wouldn’t pass visual or emissions testing.
Mileage will greatly lower throughout however, when you drive “vigorously”, extra energy equals additional burned fuel I’m afraid.
The stock filter assembly can be a flow restriction, and an open element intake would improve possible flow. An added bonus of the open element filters, is that they permit you to simply hear the primary turbo and by-pass valve.
What concerning the stock intercooler?
The stock intercooler does a decent job up till about 17psi on the stock turbos, after that you simply would most likely notice a significant gain, especially in warmer temperatures, having a nice front mount intercooler. However, keep in mind it is going to block a few of the airflow to the radiator, also as decreasing response slightly.
Should I replace the factory rubber Intercooler hoses with aftermarket metal hoses?
It wouldn’t hurt. But it won’t help a lot either. At probably the most you may slightly improve throttle response, but at the least it’ll look nicer.
What about the fuel system, are the stock injectors and fuel pump large adequate for BPU(TM)?
Yes, the stock fuel program is rather safe and trustworthy to 450RWHP, despite the truth that I would advise a fuel pulsation damper bypass. Anything more than that, and I would highly propose having the vehicle dyno’d, and utilizing a wide-band O2 sensor (not a low cost A/F gauge connected to the stock O2) to check the fuel ratio at your high boost setting. 11.5:1 could be a safe fuel ratio.
What are the stock injectors rated at?
Everyone remembers the renowned 10-second orange MKIV generation Supra. This could be the point exactly where Supra owners started to assume additional about converting their slow non-turbo 2JZ-GE engines into a 400-700 horsepower 2JZ-GE-T beasts.
BPU(TM)’d Supras run somewhat on the wealthy side as far as fuel ratios go. This hurts power. What it does do is offer a safety margin that makes engine damage by way of detonation unlikely. One of the most popular electronic fuel controllers could be the A’PEXi S-AFC.
What should I use to enhance my increase level, an Electronic Boost Controller, or a Manual BC?
Using an EBC will be the safest solution to raise boost, it’s going to avoid spiking and over-boosting. But it really comes down to your budget. If it is possible to afford an EBC, get one. If you can’t, go with a MBC. And usually keep an eye on that enhance gauge. And whatever you might be employing to control boost, keep in mind to not get carried away, I do not recommend going on a regular basis more than 18psi.
What is the finest Electronic Boost Controller?
The new Blitz unit is also nice. Most of the significant manufacturers make decent units. Just steer clear of fuzzy-logic equipped models for those who still have the sequential stock turbos, they are going to turn out to be “confused” by the unnatural behavior of the sequential system.
The Primary Turbo is the only one having a wastegate. When in full twin turbo mode, the increase of each Turbos is regulated by the main turbo’s wastegate. So, only connect it to the Primary’s.
Some persons say I need to replace my ECU having a reprogrammed one, rather than just employing a boost controller. Do I?
Reprogrammed ECUs for the Supra TT are VERY $$$. They are in the $1200 range. And they have not been confirmed to offer a substantial increase in performance or safety on BPU(TM) level cars. Their merit shows itself on cars with upgraded Turbo(s). Just be positive you purchase your ECU, or have it reprogrammed by a reputable shop that knows what they’re doing. And have it tailored to your unique vehicle (Driving habits, and Mods). And I would also propose taking a look at the AEM Programmable system.
What is really a safe increase level to run at BPU(TM)?
The general consensus is 17-18psi.
However quite a few other brands exist.
Will a high-flow cat hurt performance?
It will have some effect on energy output, but not a lot. Its precise effect on HP is not clear, however it likely costs a amount of hp at the most, maybe 5-15hp at BPU(TM) power levels.
It is the section of the exhaust method that connects the outlet of the Turbocharger’s Turbine section to the “Cat-Back” exhaust system. The Downpipe is also where the two catalytic converters are located, also as the O2 sensor (or sensors in OBD-II cars).
I’ve an OBD2 car. Can I still install a Down-Pipe?
Yes.
Which Exhausts are the loudest?
The Tanabe Racing Medallion, and HKS Hiper Titanium seem to be the two loudest systems.
Which Exhausts are the quietest?
I am one of those owners (yes, a girl having a stunning red Supra) having a naturally aspirated Toyota Supra 1995, 222hp in stock with manual gearbox. The only factor that was incorrect was the lack of power. So I made the decision to tune it. I was completely new to turbo chargers, standalone engine management, intercoolers and BOV-s. I had no concept just how much it could expense and that it was not the best selection to tune a vehicle with 184k miles on the odometer.
The Tanabe Hyper Medallion, the discontinued Tanabe G-Power Medallion along with the GReddy (SP) Street Performance appear to be the quietest.
What are some recommended exhaust systems?
It depends on your personal preferences.
-Random Technologies (75mm, full stainless steel)
Subtle Styling / Low Sound Level / Moderate Cost:
Subtle Styling / Moderate Sound Level / Moderate Cost:
-ATR (75mm, full stainless steel)
Tasteful Styling / Low-Moderate Sound Level / Low Cost:
-HKS Dragger II (85mm)
-GReddy Power Extreme (80-94mm)
-HKS Super Dragger (95mm)
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