(BPU(TM) is really a trademark of SupraStore.com)
Basic Performance Upgrades. These are the modifications which have verified to give the ideal HP-to-$$$ ratio.
What does the + mean when an individual says BPU(TM)+? And what is APU?
One “+” refers to Adj. Cam Gears and under-drive pulleys, the second “+” refers to a Fuel controller, ECU upgrade, etc. For instance, a Supra using the BPU(TM) modifications, plus a front-mount intercooler, will be referred to as BPU(TM)+. Then it is referred to as APU, advanced performance upgrades.
What are the very first engine modifications I should perform?
I suggest starting with raising the boost of the stock turbos to roughly 18psi. This may need a good quality increase gauge along with a enhance cut eliminator (GReddy BCC). This will supply an addition of roughly 30rwhp. After those modifications are completed, it would be a logical next step to install the Down Pipe and Cat-Back Exhaust at the similar time. You will now be at full BPU(TM).
What do all of the various “Free Mods” do?
The ones I will cover fall into three categories, boost control, EGR disabling, and TTC or True Twin Conversion.
Three of the boost control mods are: Bleeder-T Mod, Clamp Mod, and the VSV Bypass Mod. Each of these modifications raise enhance levels without the use of a enhance controller. But you must maintain a close eye on your boost gauge, and ensure they are not permitting the turbos to enhance too high (18psi can be a secure level).
The subsequent mods, are the accurate twin conversion mods (or TTC). This modification disables the Sequential twin turbo operation, and causes the turbos to run continuously in parallel (both on at the same time). This is supposed to allow for slightly better mid-range energy (before the secondary turbo would ordinarily come online) and allows for a smoother power band, without the abrupt increase boost brought on by the transition from primary to secondary operation.
The final mod I will discuss could 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 stop the super heating of the amount 5 and 6 cylinders, which may trigger burnt valves.
How a lot power will my automobile make at BPU(TM)?
It varies from car-to-car, along with the conditions as well as tuning. Most BPU(TM)-only Supra Twin Turbos, dyno between 370 and 410 horsepower at the rear wheels. This is usually achieved with moderate temperatures, a reset ECU (to erase something poor the ECU may have learned), and normally slightly bit of high-octane un-leaded race fuel. On the street, power might be reduced, especially in poor weather, but no less than 90 percent of the power need to be retained.
What type of 1/4 mile ETs and trap speeds will need to I run at BPU(TM)-only?
It varies WIDELY depending on driver skill. As nicely as track conditions, elevation above sea level, ambient temperatures, humidity, and pre-race preparation. But most fall in between 12.3 to 12.9 ets with 112 to 119mph trap speeds on street tires.
Once the speed-limiter is disabled, by pulling the “TRAC” fuse of course.
Yes, but not by a considerable amount. If the vehicle is maintained properly, plus the vehicle is treated with some respect for the components, you ought to sustain considerably of the power train’s life. Which thinking about the truth that the Supra is by far 1 of probably the most dependable and durable sports cars, it is going to last longer than most nicely maintained STOCK sports cars. It will a lot more than likely not last substantially longer than 8-10k miles as soon as at BPU(TM). If your stock clutch has high mileage on it, or is already beginning to slip, you may need to have to strategy on a new high-performance clutch. Also the stock turbos are going to be topic to a somewhat shortened life span (how short will depend on how you drive and preserve the car, also as just how much increase you may run)
Chassis, electrical, and suspension components need to see small impact on reliability on street driven Supras. The stock 2JZ-GTE engine must hold up pretty properly to this power level. Just how lengthy depends upon maintenance, and how challenging you drive it, and how often. But typically Supras can go for years at this power level. The transmission reliability will depend on whether it’s an Automatic or Manual.
Basically a set-up which is either VERY properly concieved, or utilizes OE components as a lot as possible, with out more than burdening them, would posses *near* stock reliability. And tuning of the components, and component selection, and matching, would play a HUGE role in this.
What are the energy limits of the various factory components (Differential, Transmission, Motor, etc.)?
There have seriously not been adequate failures to actually pin point a limit for the many power-train components. But needless to say at these power levels, if the engine just isn’t set-up and tuned properly, it seriously is literally a bomb waiting to go off, even so this will be just as accurate having a built motor. Some owners have pushed their stock internals to the limit and have nicely exceeded 800rwhp, and also approached 900rwhp. I still don’t understand 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.
Differential, axle, CV Joint, and drive shaft failures are a VERY uncommon occurrence. So I don’t have considerably info on their failure limits. On street tires, it will be virtually impossible to break any of these components at ANY energy level. The tires would spin prior to they would place the driveline below that type of strain. The tires act sort of like a circuit breaker. If you run drag slicks, this doesn’t hold true of course, yet they have proven themselves to be 10 and also 9 second capable.
Will drivability, interior noise levels, and low-end energy be adversely affected using the BPU(TM) mods?
Drivability just isn’t adversely affected. Some will make it far louder; some will in fact make it quieter. But most are just somewhat bit louder than stock. But the added dBs are also combined with a MUCH sweeter exhaust note, so it’s absolutely worth it. And the interior of the Supra is fairly quiet anyway, so on the highway, it’s going to be VERY livable. So low-end energy and response is significantly improved more than stock.
Will emissions be adversely affected by the BPU(TM) mods?
So long as a high-flow cat is used, emissions will need to not be effected, and also you ought to still pass visual inspection. If you run without catalytic converters, you happen to be doing so at your own risk, and also you wouldn’t pass visual or emissions testing.
If driven calmly, as in light throttle, mileage should not be significantly affected. Mileage will significantly decrease in the course of however, should you drive “vigorously”, additional power equals more burned fuel I’m afraid.
My guidance would be to either modify the stock filter box, or install a cool air induction box, like the Max Air.
What concerning the stock intercooler?
The stock intercooler does a decent job up till about 17psi on the stock turbos, following which you would possibly notice a substantial gain, especially in warmer temperatures, with a great front mount intercooler. However, maintain in thoughts it’ll block a few of the airflow to the radiator, at the identical time as decreasing response slightly.
Should I replace the factory rubber Intercooler hoses with aftermarket metal hoses?
It wouldn’t hurt. But it will not aid a good deal either. At probably the most you could slightly enhance throttle response, but at the very least it’ll look nicer.
What concerning the fuel system, are the stock injectors and fuel pump significant adequate for BPU(TM)?
Yes, the stock fuel program is very secure and dependable to 450RWHP, although I would suggest a fuel pulsation damper bypass. Anything over that, and I would extremely suggest having the auto 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 secure fuel ratio.
What are the stock injectors rated at?
Supra has turn out to be incredibly well-liked after the Fast & the Furious movie. Everyone remembers the famous 10-second orange MKIV generation Supra. This will be the point exactly where Supra owners started to believe a lot more about converting their slow non-turbo 2JZ-GE engines into a 400-700 horsepower 2JZ-GE-T beasts.
This hurts power. What it does do is offer a safety margin that makes engine harm by means of detonation unlikely.
What need to I use to enhance my increase level, an Electronic Boost Controller, or a Manual BC?
Using an EBC will be the safest technique to raise boost, it’ll avoid spiking and over-boosting. But it actually comes down to your budget. If you are able to afford an EBC, get one. If you can’t, go with a MBC. And often maintain an eye on that enhance gauge. And whatever that you are utilizing to control boost, remember to not get carried away, I do not advocate going frequently more than 18psi.
What will be the most effective Electronic Boost Controller?
Most of the huge manufacturers make decent units. Just stay clear of fuzzy-logic equipped models for those who still have the sequential stock turbos, they will come to be “confused” by the unnatural behavior of the sequential system.
The Primary Turbo is the only 1 with a wastegate. When in full twin turbo mode, the increase of both Turbos is regulated by the primary turbo’s wastegate. So, only connect it to the Primary’s.
Some people say I require to replace my ECU having a reprogrammed one, instead of just using a increase controller. Do I?
Reprogrammed ECUs for the Supra TT are VERY $$$. And they’ve not been confirmed to supply a considerable improve in performance or safety on BPU(TM) level cars. Their merit shows itself on cars with upgraded Turbo(s). Just be certain you obtain your ECU, or have it reprogrammed by a reputable shop that knows what they are doing. And have it tailored to your unique vehicle (Driving habits, and Mods). And I would also recommend taking a appear at the AEM Programmable system.
What is really a secure boost level to run at BPU(TM)?
The common consensus is 17-18psi.
Which Down-Pipe is recommended?
The RMM (or Rod Millen Motorsports) Cat-less Downpipe could be the most commonly used. However many other brands exist.
It will have some impact on power output, but not a lot. Its precise effect on HP is not clear, but it almost certainly expenses a quantity of hp at the most, perhaps 5-15hp at BPU(TM) power levels.
What is a Down-Pipe?
The Downpipe is also exactly where the two catalytic converters are located, at the identical time as the O2 sensor (or sensors in OBD-II cars).
I’ve an OBD2 car. Can I still install a Down-Pipe?
Yes. But unless the DP has a Catalyst and a second location for an O2 sensor, you’ll trip your check engine light, unless you get 1 of those O2 “black boxes”.
Which Exhausts are the loudest?
The Tanabe Racing Medallion, and HKS Hiper Titanium appear to be the two loudest systems.
Which Exhausts are the quietest?
The automobile is gorgeous, sexy lines, original interior – fantastic feeling to drive the car. The only thing that was wrong was the lack of power. I like to drive fast, I just enjoy brutal acceleration with wheel spin and 222hp was not enough for the Supra to become my dream car. So I made the decision to tune it. I had no notion just how much it could price and that it was not the greatest selection to tune a auto with 184k miles on the odometer.
The Tanabe Hyper Medallion, the discontinued Tanabe G-Power Medallion and the GReddy (SP) Street Performance seem to be the quietest. At something much less than full throttle, they’re no louder than stock. But at full throttle they appear to “wake up” a bit.
What are some suggested exhaust systems?
It depends upon your private preferences. Below I will break down some of my recommendations based on certain combinations of preferences.
Subtle Styling / Low Sound Level / Moderate Cost:
-GReddy Street Performance (80mm)
-Tanabe Super Hyper Medallion (80mm, full stainless steel, 50-state legal)
Subtle Styling / Moderate Sound Level / Moderate Cost:
-ATR (75mm, full stainless steel)
Tasteful Styling / Low-Moderate Sound Level / Low Cost:
-HKS Dragger II (85mm)
Tasteful Styling / Low-Moderate Sound Level / Moderate Cost:
-GReddy Power Extreme (80-94mm)
-HKS Super Dragger (95mm)
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