Finally I fail to see how it is not cost effective/safe/cool/etc to run this in relation to superchargers. Both require fuel delivery upgrades (injectors, pump, FMU), both require new exahust, both SHOULD include charge air intake cooling (BIG minus for the TRD), piggy back smt6/7, and LOTS of dyno tuning....

 

i never really saw "it takes power to make power" as such a bad thing. if you end up with 50% more power in the end, who cares?

 

backpressure is the amount of pressure in the exhaust pushing back, its impossible to have NO backpressure with a normal exhaust system (at least anything that would make sense to have on your vehicle)....what he is saying, adding a turbo into exhaust adds a restriction, thus adding backpressure...if there was no backpressure there would be no pressure at all....the turbo needs pressure to turn...

Both require power to make power, its psychially impossible to make power without doing anything.....well at least according to science

Imagine it this way, to have a none measureable amoutn of backpressure with an exhuast system it would have to been really really big, like a foot in diameter. So if you had a turbo in that it would never move, at least enough to make power. Back pressure, unlike some people like to think, is NOT required and the less amount of backpressure the better. A turbo is by far more effecient but it still take power to make power....

 

there is alot of ping/knock issues trying to get the most power out of it. Usually lack of fuel mods....

 

true enough, a gain is a gain is a gain, but....

Why not gain 25% more power at the same stress level on the engine?

Assuming you dont have charge air cooling on the turbo (just like a roots supercharger) both may cram the same mass of Oxygen, Nitrogen, and Fuel into the cylinders... Where the supercharger looses is in the drive system... So for any given stress level on your engine the turbo will produce more power.

 

easy, on a typical lawn mower the blade is attached to the output shaft of the motor

 

hehehehe it's all cool.

T04 refers to the housing catagory or a family of turbo chargers all using the same housing size.

The 76-P trim turbine refers to a 76mm diameter with a specific pitch to it's blades. Of the 76mm turbines there are O, P, and Q trims with O being the earliest spooling of the 76s and the Q being the latest spooling given the same flow rates. (turbines go in the exhaust path and are connected to the compressor wheel so the exhaust gasses spin the turbine which spins the compressore wheel)

The T04e-60 denotes a specific compressor wheel which would be closely suited to the needs of a 3.4L or so, but also flows a good amount of air...

The a/r size designates more or less where the exhaust gasses will hit the turbine blades. A high a/r such as .84 will take a while to spool yet flow a great deal of gas... A low a/r such as a .53 will spool very quickly in comparison and be somewhat restrictive on the top end for flowing gas...

 

ps

BOV - Blow Off Valve, basically vents the boost off when the throttle plate on the throttle body snaps shut. This way the compressor wheel is not damaged by surging. (air going the wrong way in the turbo)

Wastegate is a bypass on the exaust side that keeps the turbine/compressor wheel from overspooling and exploding. Basically when a certain boost is achieved, the wastegate opens allowing exhuast gas to bypass the turbine keeping it from overspooling. If you choose the wrong size for a given flow rate of the engine, you can overspool the turbine/compressor and will grenade it the first time you revv the engine...

 

In my opinion, it really depends on what your looking for. A turbocharger is more efficent, but it also has lag. A supercharger doesnt have lag but isnt as efficent. In a truck application, might towing, hauling, off-road...I prefer a supercharger, since alot of the time I'll need power all over the RPM range. If you want it more for a racing application then you'll probably be better with a turbo charger.

I dont think TRD's supercharger is over rated. I'm not sure, whats it had alone, 75 HP? Thats a 40% power increase, add the seventh injector kit too the supercharge, that will give you 110 HP over stock, which is a 57% power increase. I think that is a good amount and people actually under rate it.

On ebay you can pick up a TRD Supercharger for 1800, 2800 with the seventh injector kit. Install by a dealer and it wont void your warrenty. Although thats expensive you can keep your warrenty.

 

OOC what is the 7th injector kit all about anyway? I also see it advertised on eBay for 99+ or 2000+ V6, that sort of thing. I have a 97, which in theory anyway is the exact same motor. Is there *any* reason an s-charger or 7th injector (whatever that is) won't work for any year of 3rd gen?

 

you can s/c any 3rd gen 4runner. If you are looking into fuel management, for the money the URD kit is superior. At least if you want to be able to tune your vehicle. The 7th injector kit is a fixed unit you cannot program or adjust

 

Ok, but again what does the 7th injector do? Is it just something to muck with the ECU signals, or ?? What's the URD? (Just asking since these are new things to me, but an S/C may be in my "6 months from now" future)...

 

http://urdusa.com/ This will answer a lot of ur ?'s.