STS Turbo
Thread Starter
Instructor
Joined: May 2006
Posts: 191
Likes: 0
From: TEXAS
STS Turbo
Has anyone put rear mounted twin turbos on a C-3? With the spare tire out there is a lot of room back there. They say fiberglas springs can't6 be near heat ,but except for that it looks good for space.
Last edited by msb184; Apr 1, 2007 at 12:31 AM. Reason: content
Le Mans Master
Joined: Feb 1999
Posts: 5,877
Likes: 1
From: Park Ridge IL
It isn't bad for the price, but there are alot more exceptions to consider in addition to the effects of heat on the composite spring. Compared to a traditional near-engine turbo configuration significant heat energy loses occur resulting in loss of efficiency and increase in turbo lag. Read any turbo theory and design book and you'll realize that the STS system goes counter to nearly every "best practice". With that said, it's relatively affordable, easy to install, and does result in a good increase in performance, but it will never match a properly designed turbo system, everything else equal.
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
It isn't bad for the price, but there are alot more exceptions to consider in addition to the effects of heat on the composite spring. Compared to a traditional near-engine turbo configuration significant heat energy loses occur resulting in loss of efficiency and increase in turbo lag. Read any turbo theory and design book and you'll realize that the STS system goes counter to nearly every "best practice". With that said, it's relatively affordable, easy to install, and does result in a good increase in performance, but it will never match a properly designed turbo system, everything else equal.
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Racer
Joined: Mar 2005
Posts: 303
Likes: 2
From: southeast Idaho
Here is another "rear mount turbo" setup that works well.
http://www.schwartzperformance.com/alien.htm
http://www.schwartzperformance.com/alien.htm
Melting Slicks
Joined: Dec 2004
Posts: 2,161
Likes: 0
From: pr, frederick md.
i saw this kit installed on a c5 on horsepower tv. they claimed that the turbos being further away from the engine decreased temperatures. and i dont understand the lag issue. exhaust doesnt slow down in the pipes, and this kit also elimates the mufflers, so i dont see the problem
Le Mans Master
Joined: Nov 2004
Posts: 6,434
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St. Jude Donor '07
i saw this kit installed on a c5 on horsepower tv. they claimed that the turbos being further away from the engine decreased temperatures. and i dont understand the lag issue. exhaust doesnt slow down in the pipes, and this kit also elimates the mufflers, so i dont see the problem
Drifting
Joined: Sep 2004
Posts: 1,959
Likes: 1
From: North Bend Ohio
i saw this kit installed on a c5 on horsepower tv. they claimed that the turbos being further away from the engine decreased temperatures. and i dont understand the lag issue. exhaust doesnt slow down in the pipes, and this kit also elimates the mufflers, so i dont see the problem
These systems are for people that arn't smart enough to design a proper turbo system.
BigBlockk
Later.....
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
exhaust gasses do slow down, as temp goes down the molecules are less excited and require less space (think of people standing next to each other vs. the mosh put @ a metal concert LOL) this means that as the volume goes down it also slows down. Hot gasses travel faster than cold gasses over a pressure drop as the pressur drop is the driving force and hot gasses, needing more room, have a higher pressure.
Melting Slicks
Joined: Dec 2005
Posts: 2,441
Likes: 0
Yeah, he's talking about me, but the discussion (flak?) was over whether or not a rear mount was a viable option for the average hot rodder, Monty's answer suggests it's definitely worth consideration.
Last edited by shafrs3; Apr 2, 2007 at 06:29 PM.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Do you want to get better power out of the engine you have, or do you just want to add a turbo? If you want to add power, nitrous is probably the best bang for the buck...and you could put your pressure tanks under the gas tank! If you add a turbo and put it in the rear, who will know? If you can't see it, would it still be cool? 
Melting Slicks
Joined: Dec 2005
Posts: 2,441
Likes: 0
I have toyed with the idea of a turbo(s), I'm a big fan of that form of forced induction and have done it before (not rear mount) with impressive results. But since I have a big block I'd like to keep all the auxiliary accessories and not have to rearrange the front end, all the under-hood space is pretty much used up. I know the rear mount sacrifices efficiency due to heat loss but for a big block C3, the rear mount seems the least intrusive, simplest and, to me at least, most obvious solution. And hey, it's a short trip to the rear! I know this ruffles the feathers of some turbo purists, but if you look at it another way, how much heat potential are you loosing with no turbo vs. a rear mount?
Coolness factor, well you may not be able to see them but you can still say you've got about 750hp at the crank, that's always cool.
Coolness factor, well you may not be able to see them but you can still say you've got about 750hp at the crank, that's always cool.
Last edited by shafrs3; Apr 1, 2007 at 09:16 PM.
Melting Slicks
Joined: Jul 2005
Posts: 2,060
Likes: 46
From: winter haven florida
St. Jude Donor '12
the topic of the rear mounted turbo (sts) comes up in the c-5 section all the time. there are several members that have these and they are putting down some very impressive hp numbers. also the lag that everyone talks about isnt really that big of an issue on a large cube v-8. we have instant tq for the most part. it is more of an issue on the smaller ricer motors. there are better designs out there and theory of turbo design is debated all the time, but it is fact that this system does work very well. do a search in the c-5 sections and there are some vids of these systems.
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
There's a video on youtube where they do that fidanza car, they totally rig the dyno test to start at a much higher rpm by downshifting....they have some bogus explanation for it there but in reality it's there to hide the fact that the turbine doesn't spool up sooner otherwise
Last edited by Twin_Turbo; Apr 2, 2007 at 03:16 AM.
Racer
Joined: Mar 2005
Posts: 303
Likes: 2
From: southeast Idaho
Hey shafrs3, build a setup like mine. I did it for the same reasons, didnt want to lose all the acessories. I want a nice cruiser type car that I can drive on long trips.
http://s73.photobucket.com/albums/i2...ngthevette.flv
http://s73.photobucket.com/albums/i2...ngthevette.flv