Rear Mount Turbo Ke55

[go baby go]

Hello to all. this is my first mechanical question....so be gentle.

 

There is a growing trend in the US of removing all mufflers from your car and puting a turbo in the location where the rear muffler was. So I'm thinking about doing this to a ke55 coupe and would just like to get any thoughts from you all. Is this a good idea? will it be to loud with no muffs? Has any one else done this?

 

So heres the plan..... step 1. An exhaust pipe runs to the back of the car and into a turbo

2. Air is drawn in from the rear under the car? I'm a little worried about sucking in water when its wet.

another idea is to use the vents in the rear quater panels (with custom grills) as the air intakes feeding the turbo

3. Have the compressed air flow to the engine via a very long intake pipe from the rear of the car to the intake manifold

or carbie.

4. Additional oil pump to pump oil from the sump to the turbo and back again ( this may act as a cooler a little).

 

Thats about it. Why do I want to do this?

 

For a few reasons. Stealth install. If a cop looks under the hood and sees a standard looking K motor then they are more inclined to leave you alone.

Having a sleaper appeals to me. Will give the car more go. Will keep under bonnet temps down. Will put a little more weight over the rear wheels, And it will be different.

 

Your thoughts will be respected.

[SLO-030]

It may work, but probably not too well due to the small displacement of a 4K.

 

There is a bloke on here (the name escapes me) with a turbo setup in a KE15. Modified inlet manifold.

 

With the airfilter on, you couldnt tell there was a turbo on there at all.

[towe001]

Hello to all. this is my first mechanical question....so be gentle.

 

There is a growing trend in the US of removing all mufflers from your car and puting a turbo in the location where the rear muffler was. So I'm thinking about doing this to a ke55 coupe and would just like to get any thoughts from you all. Is this a good idea? will it be to loud with no muffs? Has any one else done this?

From what i know a turbo can dampen the exhaust sound but i don't believe it'll be as much as a muffler can do.

For a few reasons. Stealth install. If a cop looks under the hood and sees a standard looking K motor then they are more inclined to leave you alone.

Having a sleaper appeals to me. Will give the car more go. Will keep under bonnet temps down. Will put a little more weight over the rear wheels, And it will be different.

Don't get me wrong or that cause i like the idea of a stealth setup, but a clued up cop (and there's a fair few around) will ask why is there a snorkel running to the back of the car and also take a quick look under the car to see no muffler.

I don't really think it'll give the car more poke due to lag and not just the lag of where the power will be made in the rev range but also the lag from when you put your boot into it to when the exhaust gas reaches the turbo and starts winding up.

Will it be different ? Yes, it'll be different. But most people when they find out about it they'll just class it as RICE.

 

I think you'll be better off sweeping it under the rug.

About the best way for a sleeper turbo setup is of running no open air blow off valve and have it piped back into the intake if you go efi.

Or with what slo said and have a search for the turbo'd ke15

[beerhead]

There's electric oil pumps for turbo's you can get for these kind of setups, laggy as hell if you go with it, but once it's on song it'll def make good power, corning wise it'll be a little trickier to handle than a front mount turbo setup though. The pipe is nearly long enough that you def won't need an intercooler for anything under 10psi.

 

Cops normally only harass you if you do silly things on the street, Time to start doing motokanha's or track days to release your frustration by the sounds...

[madKE35coupe]

i am assuming you are on l's or p's then? by the time you get a turbo, all the piping, electrics, it will cost an arm and a leg, you would be better off just working the motor. shouldnt cost as much, and will probably get nearly the same power figures as a turbo setup. i did have a post on here a while back about a bloke i know who used a 5k in his clubman that made 200hp atw, normally aspirated.

[beerhead]

200hp atw NA 5K, that's 200kw at the crank Sorry dude, he's pulling your chain. I will never believe a 2V K motor can do that, full spec race formula atlantic 4age's make 180KW at the crank. Madrolla's 12 sec 20psi 5K KE10 didn't even have 200kw.

[ke70dave]

In the 5 yrs I've had my ke70,been pulled over countless times for 'random' breath tests, I've never had a cop ask me to open the bonnet.

 

Just keep it legal and then three is no need to be stealth. I agree with madke35 up there, not worth it. But sure have a go, would be a fun project.

 

Edit: el o el at 200 kw at wheels na 5k

Edited January 13, 2011 by ke70dave

[Twinky]

Firstly a turbo setup will not cost you an arm and a leg...

Run low boost, carbon sealed turbo, draw through retaining original carbie or go twin original carbies and re jet them.

The turbo can be sourced from a nissan pulsar turbo (early model). The rest is just pipe work.

No need to make it stealth, as said above if you are not a douchebag you will not get picked on.

[go baby go]

Thanks for the replys. :laff:

 

Ive just come from owning a JZA80 TT Supra and the cops loved that car. I never got defected just a lot of intrest and this is why I'm still in the mind set that cops will pull me over.

 

I live in a country town and the guys at the the local wrecking yards have no idea about pricing(if is not ford or holden its just rubbish, there words not mine).Finding a turbo and a few other goodies wont be too hard. I have got a set of 5 two piece meshies for $20 each and a set of 4 AME rims for $20 each. Ha Ha I love this town. :dance:

 

It will be intresting to see how much lag is generated, and if the air temp drops on its way from the turbo to the intake.

 

The more i think about it, picking up the air from the rear side vents and running it through a filter and then throuh the floor (in the boot) to the turbo will get me some nice cold air. What are the side vents for in a KE55 anyway? :hmm:

[towe001]

Run low boost, carbon sealed turbo, draw through retaining original carbie or go twin original carbies and re jet them.

If your saying about mounting the carby at the intake side of the turbo with the turbo sitting under the rear end of the car

Two major problems with that

1. Lag - put your foot down and go make a cup of coffee cause nothing will happen for a while
2. Do you really what a pressurized mixture of fuel and air sitting under the car ?

The minor problem of cable length for the throttle and choke.

 

Depending on where the air filter sits is going to depend on how much exhaust gas is going to be sucked up while idling stuffing up the fuel/air mix.

 

If you have the carby sitting in the engine bay with pipe work running to the turbo at the back, you'll compounding the two major problems into something even worse.

 

 

If you run the carby/carbies between the turbo and motor (blow-through) you'll have to box them in a semi-sealed container. Have a search for Taz-Rx and see how he did it.

Meh, here it is

http://www.rollaclub.com/board/topic/10940-sis-5kte-ke55/

[go baby go]

Towe001 Thanks for the link. intresting setup.

 

I was thinking of having the carbie blow through (in the standard position on the manifold) until I go EFI. I would never run a mixture of fuel and air any further than from the carbie to the piston, I don't like explosions when I'm in them.

 

On a 7K would intresting (more torque to fight lag) but lets blow up the stock motor first. :happy:

[Twinky]

Lol no way would I ever think of doing that! I guess I forgot to mention 'forget mounting the turbo at the back'.

I was just mentioning that turboing would not cost an arm and a leg. The only downside of running a draw through is that you

shouldn't run an intercooler aka thermobaric bomb.

 

If you are dead serious about running the turbo at the back I would suggest to run smaller pipework and use the blow through setup.

The reason I mention smaller pipework is because it would have greater airspeed than a larger OD pipe which you would want over such a long length

to reduce the lag issue.

 

I know that this has been done before (rear mount turbos) but the cars that had this done were large capacity engines and only done because of a lack of space in the engine bay. I think the main problem that you will run into is that the exhaust gasses have cooled down too mutch and slowed down too mutch before getting to the turbo being such a small capacity engine.

[go baby go]

All good points twinky.

 

I might get funny looks when going into the exhaust shop and asking for 1" exhaust tube let alone the response I will get when I tell them what I want it for. Smaller tubing is a good point for speed of the exhaust gas . As far as exhaust heat goes I had not thought of that.Maybe wrap the exhaust from manifold to turbo will help :hmm: now is that in the budget?

[anastasios]

really, just don't waste your time.

 

if it was a good way to turbocharge an engine you would see it alot more

 

if you mount your turbo low with a box/heatshield and drive normally noone will know.

 

where will you put the rear turbo anyway?

[go baby go]

Hi Anastasios.

 

I'm not sure on the location, at first i thought after the diff? But now with a few other questions being raised (like lag ect) before the diff might be a better choice. This will give Shorter runs for the pipe work, and if I need a muffler I can sneek one in after the diff.

 

Just stealing some ideas and trying to "think outside the box". I'm off to the wreckers today to see whats available for the project and what it will cost. If its to expensive then i will drop it, but if I can get the parts nice and cheap I will give it go for sure :laff: