STS Turbo System's, Yea or Nea? - Lateral-g Forums

nitrorocket · #1 09-11-2006, 06:45 AM

There are sts systems making HUGE power now. The front mount will make more power and have a massive bling factor. The rear mount has less clutter in the engine bay. The cost of both systems will be a wash. A typical front mount will make about 900 hp out of the box, a rear mount needs massive upgrades to make the same power, so in the end they cost about the same. A rear mount is also louder due to not having a muffler. You also lose dual exhaust unless you rig up a fake one or do dual rear mounts.

ironworks · #2 09-11-2006, 07:41 AM

First off I don't claim to be a turbo expert at all. But you would think that putting the turbos way out back would lose the heat that the turbos run off of. The tail pipes get hot enough to burn you but not the 1500 degrees that you can get right out of the cylinder head at full power.

Do they run different impelars or something to compensate for the loss of heat or do they just not even holod acandle to under hood kits?

Rodger

**XcYZ** · #3 09-11-2006, 07:47 AM

Good point, Rodger. From what I've read in books about turbo theory, it's the heat energy that spools the turbo, not the air moving through it. I would think you'd loose a lot of energy beteern the head and the rear of the car.

That said, there are plenty of people using the STS kit and making good power... but I don't know what type of lag they see. I would think that would be the biggest detriment.

nitrorocket · #4 09-11-2006, 08:01 AM

You are both correct, that is a huge factor. Typically a STS power curve is up higher due to more lag them a front mount. I also hear there is a noticable difference in spool and power with an sts, after the turbo gets hot it makes more power and spools faster. Most guys are getting the pipes coated and then wrap the snot out of them to keep all the heat in. If you are going to spend the money and want 800 hp, go front mount. similar cost, more power, more bling, more return value. I do not have first hand with a rear mount, but I have a ton with a front mount and am very happy with everything.

Mike Hall · #5 09-11-2006, 08:40 AM

Have you guys seen this. LOL

http://forums.corvetteforum.com/show....php?t=1493314

Blown353 · #6 09-11-2006, 12:19 PM

The STS systems do work but are not ideal from an efficiency standpoint; lots of thermal energy (and therefore exhaust volume and velocity) is lost by the time it gets back to the turbo, you have a much greater contained exhaust volume upstream of the exhaust housing so there's more compressibility which hurts spool time, then you have the extended piping running from the compressor side of the turbo up to the engine, etc.

Do they work? No doubt, but they aren't as efficient as a turbo mounted closer to the engine. They are easier to package and that is the big appeal to them. Also, they sound pretty cool as there is usually only 2' or so of exhaust pipe past the turbo, it's crazy loud whistling out the exhaust.

My biggest worries about them is the electric oil scavenge pump and the air filter mounted under the vehicle.

nitrorocket · #7 09-11-2006, 06:05 PM

I agree, many people have had oiling issues. I also feel mounting the filter behind the rear tires is no good!!

tyoneal · #8 09-11-2006, 06:20 PM

Quote:

Originally Posted by nitrorocket

There are sts systems making HUGE power now. The front mount will make more power and have a massive bling factor. The rear mount has less clutter in the engine bay. The cost of both systems will be a wash. A typical front mount will make about 900 hp out of the box, a rear mount needs massive upgrades to make the same power, so in the end they cost about the same. A rear mount is also louder due to not having a muffler. You also lose dual exhaust unless you rig up a fake one or do dual rear mounts.

Nitrorocket:

What LS1 TT set up are you running?

Thanks,

tyoneal

GBodyGMachine · #9 09-11-2006, 06:43 PM

We had a TT STS Vette in our shop. It was ok. It took forever to spool and while my boss was driving it the scavange pump blew a fuse. The didnt notice the huge cloud of smoke behind them until it was to late. COOKED BOTH THE TURBOS. Also with STS, I was not impressed with the fit and finish. Especially the tail pipes. Looked Terrible. I would go with the manifold mounted turbos. Much more heat energy is used and I personally think you get more bang for your buck.

Jeff

byebye67 · #10 09-12-2006, 11:04 PM

I'm just a noob, but I remember seeing a tuner shootout in Motor Trend not too long ago titled, "Strike Force". I was really diggin the blue GTO by MTI with a 422(?) cu.in. and STS in the back. Went 193 mph in the standing mile, described as "uneventful" (which i think means "good" when you're going that fast.) Although I cannot answer for the oil control problems and quality issues. http://www.motortrend.com/multimedia...arison_videos/