Who made that turbo that was NOT IN FRONT of motor?

[Nissota]

D3PE has kit by the battery

http://www.ft86club.com/forums/showthread.php?t=19572

[Coheed]

I am also curious to see how the STS kit performs on a real car, from someone with real perspective. Their dyno graph looks promising. The turbo setup saves weight over factory, and you utilize the stock exhaust, which saves you like $600+ on an exhaust setup.

It keeps the heat out of the engine bay, keeps COG low, the air filter is covered in their kit btw, and you don't have to worry about the setup scraping, as it sits higher than the muffler does. The cost is a bit on the higher side.

One of my best friends used to work there and he swears that the turbo response is really good. Most of what they build is big displacement. The BRZ/FRS is the only small engine import car they have a shelf-kit for iirc. But they are pretty convinced that it works very well.

The Ptuning kit looks amazing. I like a lot about that kit.

[R3NIK]

@Cross had the sts kit

[Flasher]

Originally Posted by stugray

I saw a turbo setup on a BRZ that was in the REAR like behind the rear bumper.

That keeps the heat out of the engine bay, and the tube run back to the engine was so long that you dont need an intercooler.

Found it: http://ststurbo.com/project_brz.php



Inportant safety tip: DONT DRIVE THIS CAR IN THE RAIN!

This is literally the dumbest thing you could do with a turbo - ever . Lot's of lag due to the long piping, low exhaust temperature and therefore less efficient, extra weight for piping.

[stugray]

Originally Posted by Flasher

This is literally the dumbest thing you could do with a turbo - ever . Lot's of lag due to the long piping, low exhaust temperature and therefore less efficient, extra weight for piping.

So you must have done the fluid dynamics calculations that shows that a straight pipe 10 feet long has more restriction than a standard Intercooler.

The only "Stupid" thing I see is the location of the air intake filter and the fact that you had better not drive through a puddle when the turbo is glowing red hot.

Actually the idea of moving the heat away form the engine compartment is brilliant just by itself.

And I guess the kits that put twin turbos in the rear of the Corvette is also stupid....
http://www.autotraderclassics.com/ca...st-77835.xhtml

Like these guys:



"citing advantages such as lower underhood, intake air, oil, and turbo temperatures, all of which are undeniable advantages for making more power – and making it safely. Rather than mounting the turbos directly at the exhaust manifold as traditional turbo systems do, an STS system sends the exhaust gas all the way to the rear of the car, where the isolated mounting position offers the advantages we just mentioned. It also saves the cost and required installation of turbo-specific exhaust manifolds.
Despite the unconventional design, it operates just like any other turbo system: The exhaust gas is sent to the turbochargers’ turbines, which spin impellers on the compressor side of the units. That compressed air is sent back up to the engine and fed to it as boost. Skeptics have questioned the STS design’s affect on boost, suggesting it falls off because of the longer route the air follows. Our experience with the project outlined here showed achieving the advertised boost level wasn’t a problem, but some turbo lag was present. "

[BlueDubbinTDI]

Originally Posted by stugray

I feel like simply getting rear ended at a measly 10-15 miles an hour or so would ruin that entire setup.

[stugray]

Originally Posted by BlueDubbinTDI

I feel like simply getting rear ended at a measly 10-15 miles an hour or so would ruin that entire setup.

Didnt YOUR exhaust run you over $1000?

I suspect any exhaust would be destroyed by a minor rear-end.
But yeah that would suck (and probably start a fire I would imagine).

[BlueDubbinTDI]

Originally Posted by stugray

Didnt YOUR exhaust run you over $1000?

I suspect any exhaust would be destroyed by a minor rear-end.
But yeah that would suck (and probably start a fire I would imagine).

Mine no but I get what you mean. that's more of a $4k gamble, but everything has its pros and cons. They just seem so unprotected in that location.

[Flasher]

Originally Posted by stugray

So you must have done the fluid dynamics calculations that shows that a straight pipe 10 feet long has more restriction than a standard Intercooler.

Well - you are actually encouraging my point. Less restriction means higher pressure, means slower velocity of the airflow, means LAG. Combined with the length of the piping you end up with lots of lag.

https://en.wikipedia.org/wiki/Bernoulli%27s_principle

[stugray]

Originally Posted by Flasher

Well - you are actually encouraging my point. Less restriction means higher pressure, means slower velocity of the airflow, means LAG. Combined with the length of the piping you end up with lots of lag.

https://en.wikipedia.org/wiki/Bernoulli%27s_principle

So you just said that more restriction is better.
"Less restriction means higher pressure, means slower velocity of the airflow"
Ummm.... NO. In fact I cant make any sense of that statement.

"Less restriction means higher pressure, means slower velocity"
So if you have NO restriction, then you have NO flow....really?

[Coheed]

Someone here mentioned the weight of the piping in the STS kit. Intake piping is aluminum and weight is not an issue.

[Coheed]

Originally Posted by Flasher

Well - you are actually encouraging my point. Less restriction means higher pressure, means slower velocity of the airflow, means LAG. Combined with the length of the piping you end up with lots of lag.

https://en.wikipedia.org/wiki/Bernoulli%27s_principle

Length of the pipe has little impact to lag. Volume, it could be argued, can help or hinder response. But do the math and the effect is very minimal. The charge piping is only 2", so it can be very long while still having similar volume to 3" piping that is common in a lot of kits.

Heat is the thing to consider here. The farther the turbo gets away from the high velocity hot exhaust gas, the less energy there is to recover from exhaust velocity. However, the turbo doesn't have mufflers or catalytic converters afterwards, and that probably helps a bit. Also, there is no shortage of nice cold air in the rear bumper area, meaning PV=NrT. You seem to like physics, so you'll understand why this is important, yes?

I am positive the lag is there, but to the extent that many claim will be a dealbreaker, I doubt it will be that severe. Honestly, they did a autocross event at MMP last season and the car seemed to do very well. With proper exhaust housing selection, ball bearing turbo, and proper attention to piping etc I think it will still respond better than most factory turbo setups from the 90s.

Of course, if heat is a concern, I do hear that having the exhaust pipes coated will not only keep them looking pretty, but has a noticeable improvement in response.

[gl2filmerguy]

The turbo thats in these kits are so small they spool damn near instantly. Just because the STS rear mount has longer piping, doesn't mean the kit has a ton of lag. They had a Camaro kit that I checked out, and theres no lag. They feel just like any other turbo car. People are so damn quick to judge kits by looks haha.

[twag4]

Unlike fluids, air is compressible. The longer charge tube requires a much greater volume of air to be sucked into the turbo, then compressed to fill the volume of the charge tube with compressed air (compressed air is the key here). It is a hugely increased volume required to be compressed. This would definitely add to the delay in full boost achieved at the intake manifold. That is how lag is increased. To understand the difference, blow a mouthful of air through a straw. You can easily feel the flow out of the end of the straw. Then, do the same thing through a garden hose. You likely won't even feel the air flow. In order to feel the air flow, you would have to put a much larger (ie: lungs full of air too, maybe more) volume of air through the garden hose (there are some other things going on here, venturi effect, Bernoulli's principle, but the jist is the same). Just a mouthful won't do it. Much more air has to be moved to yield the results at the other end of the garden hose. Same thing on a rear mounted turbo. Not saying that the turbo won't work, not getting into that argument. But some pretty basic laws of physics are going to apply. There will be a difference. I also won't comment on whether or not a normal, everyday driver would be able to tell a difference. If you hadn't experienced a typical turbo setup, you probably would be happy with this type setup. If you were familiar with the typical setup, then it might be an issue. Seems like a difficult solution to a charge heat problem, when a front mounted intercooler does a good job of cooling- and does not require 18 feet of charge pipe that is susceptible to leaks and damage. Anyway, YMMV. Curious to hear other comments.