Someone posted this on one of our local websites and Im asking the masses to give me some kind of answer to why the hell this guy did this. A CRX with a turbo mounted off the exhaust in the back of the car?? Can anyone provide me some logic to this.

http://cgi.ebay.com/ebaymotors...=6255

 

I've seen that on LS1 and LT1 due to engine space issues, but never on a 4 cyl.

 

i htink it an sts remote located turbo setup, they make alot of kits for the camaro/trans am...... i personally think its rediculous, but hey what ever works

http://www.ststurbo.com/

 

not too much clearance under tha car from what I see

 

I think it's to advertise to the guys you just blazed past that your boostin!

 

Is that his return line going up? How do those rear mounted turbo setups handle oil return?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carbonDelSol &raquo;</TD></TR><TR><TD CLASS="quote">I think it's to advertise to the guys you just blazed past that your boostin! </TD></TR></TABLE>

Yea, just too bad that setup blows ***. I drove an LS1 camaro with one of those kits, and a 60-1 HiFi with a .68 housing wasn't making 10 psi till 3400 RPM's. On my old mustang I had a Turbo Tech street kit with a 60-1 HiFi and a .96 A/R housing and it made 12 psi at 2500 RPM's. Thats's with 45 cubic inches less displacement, and less initial horsepower. They try to band-aid their poorly designed system by putting tiny exhaust housings on the kits, but all it does is choke off flow because you're using too small of a housing.

The kits use an electric scavenge pump to push the oil back to the pan.

 

Looks like a hideously inefficent way to everything...very long charge pipes = SLOW response [if any], turbo that far bac = cooled exhaust gasses = less energy = SLOW response [if any], having to run scavenging pumps and crazy long oil lines...

 

thats nuts...kinda makes me think it wont last tho being so low to the ground and gtting hit with **** from the road....just my opinion

 

yea .... . . definitely looks like any little pebble hoppin on the road could rip that thing off. not too much clearance. i dont see any logic in it tho.

 

I've seen some kind of setup where the turbo bolts inline with the exhaust where the catalytic converter goes...it was really weird.

 

If it looked really ghetto I'd think it may just be for sound... idiot ricers these days...

That looks to be clean, though. Weird.

 

I actually met the guy who owns that car today...(how random is that?)

He works for STS turbo systems (as stated before)...

It is a prototype (sp?) kit, the first one on an import. They said in the future they might come out with a similar kit for a few different Hondas. If it works and everything goes well with the one on his car.

I asked him about the heat issue, (water on the HOT turbo) he said he hasn't had
any problems yet...

I wish I would have taken pictures earlier today, maybe I'll go over there sometime in the near future and take some more pics of his car.

Oh, BTW, he said he sees full boost by 4200 RPMs, it's a fairly big turbo, I don't remember the size though.

 

What?!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Squires Turbo Systems &raquo;</TD></TR><TR><TD CLASS="quote">
*Approximately 500F lower turbo temperatures. Eliminates the need for a turbo-timer, which allows the engine to run after the car is shut off in order to cool down the turbo and prevent oil and bearing damage.

*Denser exhaust gasses drive the turbo turbine wheel more efficiently.

*Better weight transfer. Increases traction because the bulk of system is mounted in rear of vehicle rather than up front. **"I guess this is good for RWD...but not for FWD!"**



*This picture shows how hot a traditional front mounted turbo system can get under full power. **"Because we all know our turbos get THAT hot..."**
</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Squires Turbo Systems &raquo;</TD></TR><TR><TD CLASS="quote">
Q: With the turbo so far back, don't you get a lot of turbo lag?

A: No, our turbochargers are sized to operate at this remote location. Just like any turbocharger, once the turbo is up to temperature and in the rpm range for which it was designed to operate. The boost comes on hard and fast. All of our systems will produce full boost below 3000 rpm.
If you were to take a conventional turbo and place it at the rear, you would have lots of lag and consequently, our turbo wouldn't work properly if mounted up front.
</TD></TR></TABLE>

What kind of turbo is it then? They do say they use a huge turbo and small charge pipe, which helps lag...but doesn't this hurt volumetric flow?

They do use a scavenge pump to return oil from the turbo to the motor, but it says no modification of the oil pan is necessary...how and where do they get/return the oil from/to?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Squires Turbo Systems &raquo;</TD></TR><TR><TD CLASS="quote">
Q: Doesn't heat create the velocity in the exhaust gasses to spool the turbo?

A: No, heat doesn't create velocity. Heat creates volume. If you look at any of the physics laws for gasses, you will find that pressure and volume and heat are related. PV=NRT is a popular one, The V isn't for velocity, it is for Volume.
The turbine housing is what creates the velocity. The scrolling design that reduces the volume of the exhaust chamber as it scrolls around causes the gasses to have to increase in velocity and pressure to maintain the same flow rate.

Hotter gasses have more volume, thus requiring a higher A/R which in effect means that it starts at say 3" and scrolls down to approximately 1". Lower temperature gasses are denser and have less volume, so they require a lower A/R housing which would start at the same 3" volume, as the turbine housings use standard flanges, and scroll down to say 3/4".

Now if you were to reverse the housings in application, the conventional turbo would spool up extremely quick, at say around 1500 rpm but would cause too much backpressure at higher rpms because the higher volume of gas couldn't squeeze through the 3/4" hole without requiring a lot of pressure to force it through. On the reverse side, the remote mounted turbo with its cooler denser gasses, wouldn't spool up till say around 4000 rpms but once spooled up would make efficient power because it doesn't require hardly any backpressure to push the lower volume of gas through the larger 1" hole.
</TD></TR></TABLE>

Interesting.