I have a friend who sayed he would give my a turbo, and hook it up for me on my 1979 280 zx. it came off a mitsubishy or however it is spelled. he sayed all he has to do is turn it down 2 punds, and it is fine for the car. what my question is wouldnt I need a new computer, even though he isn't boosting verry much at all? I just ask because I thought the computers were prety fine tuned so with a few extra pounds of air I thought it might bog out and die. He sayed he would mount it by my tank so the air would have time to cool as well. I am not sure about this deal let me know what you guys think. I am runing with a stage three cam.

 

what do you mean mount it by your tank? the fule tank?

 

Yes I meant the rear of the car back twords the gas tank.

 

First of all, no, never run a turbo with a stage 2 or 3 cam. Especially a stage three. The intake and exhaust duration has a small amount of overlap. Swap to a stock non-turbo or stock turbo cam if you run a turbo.

#2, don't mount the turbo on the end of your exhaust pipe and never let your friend give you automotive advice.

 

why dose that small over lap make a diferance bleech? I mean is that more of an isue then the computer, he is only talking about a few pounds more. I personaly don't think the turbo at the end of the car is a good idea, and I wouldn't let him put it there, but as far as the over lap I am asking because well he's putting such little boost in, and I know that that dosn't sound even worth doing if I am not going for much, but I don't know man.

 

there is cars with turbochargers mounted by the rear and it works fine but since we got lots of space in out cars its not an issue to mount it in the bay...
you will want more overlap since you are boosting because that boost will escape prematurely due to small overlap and you will loose pressure. if it makes sense...i can see it in my head but writing it on paper is another story

 

I've heard about these rear-mounted turbos before ... I just thought it was BS at first, and I've never seen one ... what's the deal with these? And what's so special about them? I guess a lot of domestic car guys run this particular setup on their Camaros and such ...

I'm confused. I think I'll Google this to see what comes out.

 

What I mean is whats overlaped, where is the boost going to escape? do you mean the exaust opens too fast for the boost to make a differanc, creating no boost what so ever. if so why would a biger overlap make it better?

 

to partly answer Dorifto's question they mount them in the back for one space purpases, and two the air gets a little more time to cool off. I don't really know if there is too many other reasons.

 

yes overlap is how long the valves stay closed while the other one is open...if you have small overlap the exhaust valves open sooner and there goes your forced air....

 

Check this out - I just found out the company that pioneered rear-mount turbos is 5-minutes from my doorstep! A good friend of mine happens to know the owner personally! www.ststurbo.com
Check that out ... great stuff! I'm going to look into STS doing a custom rear-mount turbo for my Z, and see if they'll sponsor me when I enter a drift series in the next couple years.

 

Tell me how it goes i'm really intrested in it.
-Chuck

 

As the exhaust gasess are pushed out and the piston reaches the top of the stroke, the exahust valve is closing in a real hurry. Just before it closes all the way, the intake valve just barely starts to open. The pressure behind the turbo is greater than the compressed air in the intake manifold. Suddently those exhaust gasses push through to the intake, slamming against the compressor wheel. That'll bring your turbo to a halt in a hurry. This will usually only happen at the higher rpms. With low psi, the exhaust backpressure is still an issue, so this will happen even easier with less pressure in the intake manifold. There are probably other reasons not to use a longer duration cam.

You can try it anyway and let us know how it goes.

 

all i have to say is wow.i would have said that it cant be done.thank-you dorifto for posting that sit.

 

Hmm, that STS Turbo thing sounds interesting. Though I'm thinking the filter would get dirty/wet as hell being under the car like that...

 

Wow that is awesome. I wonder if you could just build a setup like that yourself. They said the filter does not get dirty or wet unless it is completely submerged under water.

 

Yeah - these guys are really innovative! I'm going to talk with Rick Squires himself (owner/founder of STS) this afternoon to get some more background info. I'll take some snaps of the R&D department and what is all involved in building these kits, as well as some project cars they haven't released yet (if I can ).

As for the filter wetness problem, STS manufactures a "snorkel" kit, that they custom-tailor to your individual vehicle and needs. Their project Toyota Tacoma pickup has this snorkel, and they've had water up past the bottom of the doors without problems.

Building a kit yourself could prove cheaper, but perhaps less effective ... Like I said, I'm going to talk with him today to get some technical insight on the whole shebang. Remember this, though ... Rick has patented this particular "remote-mount" setup ... I dunno about loopholes.

 

The rear mounted turbo set up is popular with the F-Body Camaro's. You take off the dual exhaust tips and mufler and put on a turbo with one exhaust and then you put a filter and another going into the intake then run another pipe up to the front to go into the MAS to feed the engine. The Turbo being put in the rear has less heat on it externally and less heat internally as the exhaust is cooled before it reaches the turbo and then the compressed air is feed back up to engine at a cooler rate thus eliminating the need for a intercooler. The guys on Horsepower TV did this about a month ago to a SS Camaro and pulled out 140 more HP at 5psi! I thought it was pretty cool to watch them install it and run it.

 

I wonder how they can claim it has no added turbo lag. Everyone knows that adding even 10 inches of intake pipe to your intercooler setup adds lag. Same goes for the pipe diameter of your tubing.

I like the picture of the red hot turbo they have on their website. I wonder if that's acccurate at all for Datsun turbo engines.

 

Theres no dobut in my mind that there is a little more lag involved, when they cranked up that Camaro it was funny, you heard the motor start and then you heard the exhaust make the spool up sound

 

Well I spoke with one of the head guys at motor sport, and he is exchanging my performanc stage 3 cam for a terbo 10-0922 cam free of charge, I just have to pay the shiping. they did say that that cam was the right choice. It took the guys about an hour to talk it over and reserch it and that is what they agreed to. so off to get my even newer cam, and my budy can slip the turbo system on for me. one thing is still in the works, and that is body. I have had this car for a few years now and I havn't had any body or paint done. I havn't even put it in my name. I have only been farting around doing engine work, and ilegally driving it on the street once in a blue moon. as of right now it halls ***** to the walls. I put a 76 head on it and a 2 in 1 performance header on it. so maybe the turbo will inspire me to work harder to find somone to do the paint and body. I have no job right now so I have been bardering.

 

Open chamber head and forced induction! Wow, good luck with that!

 

Well I wouldn't be doing it if it wern't posible. The guy who is hooking me up with the turbo stuff did the exact same thing to his 280z, and it ran quit well.

 

Hey all - yesterday I went to STS! I had a very engaging discussion with Rick Squires himself, then he took myself and a friend of mine out for a spin in a few of their project cars!

That Trans Am is INSANE!! It busts the rears loose at 65mph!
The Tundra suffers from a little lag, but once it spools, hold the hell on!
The Tacoma lights up all 4 35" mud tires from a standing start ... nuff said.
The Hemi Ram was built to sound good ... and readjust the seating position of your kidneys.
And lastly, their Integra Type-R ... well, let's just say even with R-compound Hoosiers up front, traction is still a problem.

Believe it if you want ... I've had all the proof shown to me yesterday. Better yet, I've FELT all the proof! I'm going to have them fab up a kit for my '84 Mustang. My friend is having them build a kit for his Lexus LS400 as well.

Oh, as for the glowing turbo ... that's off of a Volvo 740 Turbo. That particular car was running around 12 pounds of boost, with the stock TD05. I know of several turbo diesel Fords around my area that do that as well.

 

I think that's a great idea. Since the turbo is in the back it wouldn't get much hotter than a muffler. I would want a heat sheild between it and the gas tank. The intake piping would have to be smaller from the turbo to the engine bay to keep the pressure from dropping but it might not have any more lag than a large intercooler. You could run the pipe in the trans tunnel on the passenger side. Intake filter could be placed in the hatch area with a hole through the tailight bezel. Would need some advice on the size and A/R of the turbo. How to cool/ lubricate the turbo?