hey check this out rear mounted turbo

[scheffler]

^^ my friend started talking to me about this and i was a little skeptical but i googled it and this looks pretty cool to me what do you guys think.

[scheffler]

whoops forgot the link

http://www.chevyhiperformance....turbo/

[Fenvy]

a problem I see is that the filter will get dirty very quick, a good thing I see is that the turbo will be cooled

[Red-KAT]

If you dont have room in yer engine bay. I guess...

But sure it makes full boost by 3k... A whole 5psi whoopeeee!

[somthin240]

yeah you could also get a yard trailor and mount a 454 on it, hook it up to your rear end and go faster. but the engine bay is named that b/c that's where the engine/etc. goes. so I think it's a ghey idea.

[scheffler]

yea the filter would get dirty but i still think it is cool you would see a turbo in the engine bay (sleeper) and i am pretty sure it can make more boost than 5psi

[TheOne]

it looks kool but there is some sort of bad thing around the design...mostly some lag and maybe pressure drop.

http://www.turbochargedpower.com/ <<has a more stealthy look.

[scheffler]

uhhhh yea that bad ***

[4felix20]

looks like a quick and easy alternative to getting some simple boost. the filter probably would get dirty, but that's why they recommend that sock thing to slip over the cone. i've seen that sock thing for k&n, i think i'm going to get one...all sorts of bugs and sand are getting caught up in my cone lately.

[WDRacing]

All the doubters are simply stubborn and afraid of change. I have personally seen one on a GTO, he runs 15psi of boost through a T67 and has full boost by 3500 or so. Thats when I hit full boost on my damn car. His car does the friggin hula.

If you fab your own kit your looking at 1200 bucks in parts and thats on the pricey end.

There is no lag to speak of man...it's seriously a good idea. I just want to figure out the oil return pump then I'll be all over it.

WD

[paemt6220]

STS has been making rear mounted kits for GM trucks and SUV for a while.

[MarkEmark]

Not trying to sound close-minded or anything, but when it comes to cars, if it ain't broke, don't fix it. I've seen this set up before too, a while ago...I'm pretty sure someone posted it on NICO.

All that extra piping is ridiculous and seems like a lot worse of a plumbing nightmare than doing a standard install. It also says that the "turbo temperatures are decreased by about 500 degrees F." Don't they realize that the whole way a turbo makes power is THROUGH the heat? That's the whole purpose of turbo blankets...to keep the heat where it belongs (and to shield other engine components).

But it does look bad-***.

The mustang twin turbo looks even more bad-***.

[Fenvy]

there may be some lag BUT, with the turbo constantly cooled by air that goes through under the car, it probbaly make up for it if not better performance from the cooler turnbo

[GEO]

bottom out? Big puddle? mud?

[Fenvy]

hmmmmmmmmmm so instead of scratching your exhaust tip, you'd scratch your turbine housing until the blade are revealed

[SlidnSideways]

Thats kinda awesome...i would think alittle lag would be ok to deal with for the cooler temps.

Bottoming out and stuff would be a problem but i guess not so much for a car only used for the track that is trailered to and from?

Either way thats a pretty bad *** idea...good to know they are comming up with other alternatives even if there are a few kinks in the design

--Tim--

[get_up_mark]

thats like madd piping. im sure there is a loss of flow. maybe thats why the piping seemed a bit small for a big motor. how big is the piping exaxtly?

i agree with ohtes; not only is the filters suseptable to dirt as well as water but it can be damaged if bottomed out. also....some one can jack your turbo while your in the mall or something. wont take much time.

[WDRacing]

1, Build an airfilter box2, The piping is easy3, why would there be a loss of flow?4, Pop hood remove turbo, sounds as easy as jack car remove turbo...5, Turbo is mounted higher then the rear diff...no impact

WD

[Checkered-Member]

A while back a vendor that produces these kits came to this site we all laughed at him and told him to go away...

zerothread?id=73263

The reason being is because these kits are offered only for large V-8's why? Because only those engines can produce enough backpressure in the exhaust system to spool the turbo in a reasonable amount of time, and there is lag on those, can you imagine the lag on a 4 banger, the 1/4 would be over by the time that thing spools

[Checkered-Member]

All the doubters are simply stubborn and afraid of change. I have personally seen one on a GTO, he runs 15psi of boost through a T67 and has full boost by 3500 or so. Thats when I hit full boost on my damn car. His car does the friggin hula.

If you fab your own kit your looking at 1200 bucks in parts and thats on the pricey end.

There is no lag to speak of man...it's seriously a good idea. I just want to figure out the oil return pump then I'll be all over it.

WD

thats not what you said one year ago

How about NO...I rank this right up there with those little electric fans. Guaranteed to pass CARB huh...I think not.

If you guys think this is a good idea, I got an even better one. Which has actually been done.

Take a gas powered leaf blower, mount it in your trunk, run the output under the car into the engine bay, pull rip cord from back seat....bam instant boost with no lag. Install a wastegate inline.

This was done on a Chevelle...I'll hunt around for the MPEG.

WD

[tiger]

im not putting a turbo anywhere near my gas tank.... I dont think a glowing turbo should be anywhere near fuel... dont care if there is a heat shield ... gasoline has a low flashpoint. thats just me

[Fenvy]

no silly, that's for the ultimate misfire system

[C-Kwik]

there may be some lag BUT, with the turbo constantly cooled by air that goes through under the car, it probbaly make up for it if not better performance from the cooler turnbo

Running the turbo at a cooler temperature will do little for performance. Only a very small percentage of heat from the turbo is transferred into the charge air. With the amount of air flowing through a turbo under boost and the velocity, there is little dwell time for the turbo to actually put any significant amount of heat into the charge. Almost all of the heat in charge air is created by the compression of the air during boost. This does not change depending on where the turbo is mounted.

My take on this? It is a workable alternative. It's quite a bit less than ideal as the exhaust temperature will be much lower than it would in a more traditional set-up. The biggest drawback I see stems from this. As exhaust gases cool, so does the volume of air. You can certainly resize the turbine to compensate but the ideal compressor match does not change. Turbo manufacturers generally try to match turbine and compressor efficiency points to compliment each other. Having to size down the turbine will likely change this and cause the peak efficiencies of each to occur at different places. When looking for the quickest response and least backpressure from a given turbo, you want both the turbine and compressor efficiencies to line up well. With a rear mounted set-up like this, you'll end up with something more like a T3/T4 hybrid set-up as far as efficiency is concerned(T3/T4 are great versatile turbo set-ups, but if your quest is a ultra high HP turbo, it is not ideal because of the difference in the compressor and turbine efficiency points. But in this case, since a lot of heat energy is lost, you'll have to make up for it by running a higher pressure differential across the turbine. This basically means the motor will see more backpressure which is a parasitic loss. If you look at their power gains as well, you'll see this. A way to estimate a power increase in a motor is to multiply the power output by the pressure ratio increase. This vehicle is fairly close. However it is slightly lower than the calculated number at both the 5 and 7 psi levels. AS a comparison, 7 psi on a KA would net 190WHP from 127WHP with 7 psi. The reality is that most KA's running 7 psi are putting out closer to 220-230WHP at 7 psi.

I also find it highly suspect that this company still claims an increase in fuel economy. The turbo is in fact a restriction in the exhaust. Especially, off boost, where the turbo's efficiency is not good. They are proposing that they are able to defy the laws of physics.

Will it work. Yes. Will it make more power? Yes. Is it the most ideal system? No.

[Fenvy]

yeah, I think I have it wrong

what about increased performance from the absence of turbo? I don't have exp to say anything but from what I read, at high boost, a turbo combines heat soaked and lose performance and start to affect other things as well.

not sure what to expect out of this thing.

[get_up_mark]

idk it just seems to me that if you saw a massive turbo by the trailor hitch on a truck you might just be like "hey that can be mine" then proceed underneeth with no jack and unbolt some of the parts.

[Fenvy]

haha! that'll be the day

[AZhitman]

For someone who already HAS 300 hp, and little room in the engine bay, it's a workable alternative.

We're looking into fabbing up something like this for the Q, which should see 400+ hp at 5 psi...

[DammitBobby]

Greg? I have road in your Q and Dam it is fast enough!! I think you have the symptoms of Boost Addiction

[pr240sx]

The cure for lag on a setup like this could be adding some type of fuel injector with a spark plug, just like an afterburner!!

Try looking for a boost leak there!!.Also, you can install the air filter as high as the piping can, even on the rear bumper,or even inside the trunk. just dont leave any shopping bag near :>

[Red-KAT]

This kinda setup would be ok for a 350z... Only spot in those cars is underneath by the transmission.

Why dont they just pull the intake air from inside the cabbin? Then its a bonus to have yer AC on. :P haha!