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Old 11-09-2007, 01:54 PM   #1
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Default would you add an intercooler?

i have a small turbo on my 90 (not sure what turbo) that does not have an intercooler. i get about 5-6psi max. it runs with a 5th injector before the intake manifold. i am thinking of putting in an intercooler.

1. any idea of what that will do for the performance?

2. i have an oil cooling unit in front of my radiator that takes up a small space. would and intercooler and the oil unit starve the radiator? or should i pull out the oil unit?

3. what size intercooler is suggested (if at all)?
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Old 11-09-2007, 02:19 PM   #2
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5th injector = intercooler.

Adding a intercooler will increase the performance,by how much? depends on your set-up.

Pretty much any size intercooler will do,just don't go too small.
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Old 11-09-2007, 02:34 PM   #3
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are you saying the extra fuel injector has the same effect on performance as the intercooler does? if so would there be any point to adding the intercooler if i keep the extra injector?
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Old 11-09-2007, 02:40 PM   #4
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No! it was a joke.

Get a intercooler,you won't regret it.
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Old 11-09-2007, 02:52 PM   #5
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Intercoolers are outmoded. Just get a PC-Pro (or two!) to solve all your problems. In fact, you could probably replace your entire engine with an array of PC-Pros.


Just kidding


The setup here: http://www.mx5projects.com seems to be pretty popular (maybe because a forum member sells the IC piping there). FWIW, I'm definitely going that route.
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Old 11-09-2007, 02:57 PM   #6
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if you dont know what turbo is on your car i would not even consider doing any upgrades to your system...learn exactly what you have and then learn how you can upgrade it or make it better...then, dont come back asking how to mount the IC because its all in the SEARCH bud
GL and happy studying
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Old 11-09-2007, 05:36 PM   #7
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wow, someone i know personally has to 2nd guess my advice and post on the board. thanks Mike.
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Old 11-09-2007, 05:39 PM   #8
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First thing I'd do is look for identification on the turbo, the 5th injector, and what's driving the 5th injector.
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Old 11-09-2007, 05:43 PM   #9
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You don't need an intercooler, you just need to zip-tie a water injection kit into your ratfucked engine bay.
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Old 11-09-2007, 07:09 PM   #10
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im sure if you stick an intercooler in the mix you'll receive a bit of power (same boost measrued at IM), not much. but what you do walk away with is cooler intake temps (& denser air). so you can increase the timing advance a bit or even increase the boost if you have enough fuel.
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Old 11-10-2007, 01:50 PM   #11
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It sounds like you need to do a lot more homework into what exactly you have currently and the capabilities of IT before you do anything else. Do you have a dyno plot or know anything about the tune?

Are you sure it's an oil cooler in front of your rad? It probably is, but people have done weirder things to Miatas? There's a PS cooler kit out there too.

Do you have AC or PS?

The fifth injector setup you're using does two things.
#1: It allows you to use an otherwise stock fuel system. Adding the fifth injector alleviates the need for bigger main injectors, and AFPR, or a fuel pump... at the low boost levels you're running.

#2: Anytime you atomize a liquid into air, it has a cooling effect on the air. There's a company out there that makes superchargers and advertises their fifth injector setup as an intercooler substitute due to the large amount of cooling the fuel provides when it's injected into the airstream pre-manifold. (Hence, Spikes' joke).

It actually works really well up to the point where the air coming from the turbo is simply too hot... like when you turn up the boost... but then even a large 550cc RC engineering injector (like I suspect you've got) won't provide enough extra fuel anyways... so you need more.

An intercooler will provide the extra charge cooling you're looking for to be able to turn up the boost. But then your limiting factor is fuel. You need to know the limits of the fuel system you're running... which is why you need to research exactly what you've got. If that extra injector isn't big enough or the controller for it has limited adjustability or is fixed, turning up the boost, no matter how cool the charge air is will still run you lean. And you still need to tune it once you turn up the boost.

Take some pics for us and post them up and we can help tell you what you've got and where your next step should be if you're looking for more power. Also, tell us what you're looking for... is it just another psi or two of boost, or are you looking to run 10-12psi or what?
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Old 11-10-2007, 01:58 PM   #12
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Quote:
Originally Posted by BenR View Post
You don't need an intercooler, you just need to zip-tie a water injection kit into your AWESOME engine bay. Of your car that would pull on me and any car i could get my hands on
:gay:
A simple WI kit will meet your needs just fine man.
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Old 11-11-2007, 08:26 PM   #13
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Quote:
Originally Posted by magnamx-5 View Post
:gay:
A simple WI kit will meet your needs just fine man.




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Old 11-11-2007, 08:50 PM   #14
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Mike, isn't it a Greddy you have?
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Old 11-11-2007, 10:52 PM   #15
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from the casting on the outside it has "airesearch m10" on it. i believe it was originally for a nissan 240. i have been trying to track down exactly what it is, but have not nailed it down yet. unfortunately the guy who did the turbo work passed away about a year ago....hence how i inherited the car.

the only paperwork i have is for the 5th injector and its just the install manual. the manual states that unit allows you to run your stock motor and injectors.

it is an oil cooling unit i have in front of the radiator.

any ideas what exactly this is?

www2.snapfish.com/slideshow/AlbumID=138353336/PictureID=4164430303/a=72899190_72899190/t_=72899190

Last edited by booch; 11-11-2007 at 11:24 PM.
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Old 11-11-2007, 10:55 PM   #16
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^Bad link on that photo.
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Old 11-11-2007, 10:56 PM   #17
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a red X
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Old 11-11-2007, 11:26 PM   #18
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i think i fixed the link.
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Old 11-12-2007, 10:23 AM   #19
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Quote:
Originally Posted by messiahx View Post
The setup here: http://www.mx5projects.com seems to be pretty popular (maybe because a forum member sells the IC piping there). FWIW, I'm definitely going that route.
Yup, I sell these pipes. These pipes are PnP with a stock greddy kit. You might have to modify a few hotside pipes to fit a custom setup. I have a feeling this kit will be a thing of the past once the new basic Begi kit catches on.

You can fit a fairly large intercooler if you're not running AC. If you do plan on keeping your AC, you may have to run an intercooler like the one suggested off my site or smaller. Any size intercooler can fit with enough determination.

Search some of M2cupcar's threads. A few month's ago he was getting creative with his intercooler and oil cooler placement.
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