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turbo97 02-20-2009 03:52 PM

New to the forum
 
4 Attachment(s)
hi everyone

just bought a 1997 1.8 turbo from a guy in my area.
i'm from orlando, the UCF area
the turbo system is kind of a homebrew kit that the previous owner put together
he said it was an hks manifold, sequential blow off valve, i think he said something about the turbo being from an eclipse or something like that
stock injectors and stock ecu. there is a 550cc injector set up right before the intake manifold in the piping set to turn on at full throttle
i'm looking to get a piggyback and 305cc injectors, from what i've read that should work well

the turbo seems to need new bearings, has shaft play....easier to get a new turbo?
it definitely needs a new oil return on the oil pan, its leaking some oil and the car burns oil like crazy when i first start it. i'm assuming its because the seals on the turbo may be no good anymore mostly because the guy before me put the oil return on the lowest part of the oil pan :eek4:
i had a n/a gti before this miata so i've never owned a turbo car.
any advice would be great and i'll be posting alot of stupid noob questions haha. after i use the search of course.

anyway, let me know what you guys think.

thirdgen 02-20-2009 03:58 PM

Welcome! Where are you from? What turbo is on the car? What are the other specs of the car? What fuel management are you running?

Rafa 02-20-2009 05:13 PM

Welcome. Please post your location below your Avatar.

Needs bigger wheels! :giggle:

Braineack 02-20-2009 05:35 PM

More details on the turbo...thing looks HUGE.

-1 on the tiny radiator...


there is a 550cc injector set up right before the intake manifold in the piping set to turn on at full throttle
i'm looking to get a piggyback and 305cc injectors, from what i've read that should work well
working well is subjective...


may be no good anymore mostly because the guy before me put the oil return on the lowest part of the oil pan https://www.miataturbo.net/forum/../...ilies/eek4.gif
should be one of your first projects...this is why the turbo smokes.

thirdgen 02-20-2009 06:03 PM

Now that is a turbo. T3 / T4 Hybrid?

nicacus 02-20-2009 07:57 PM

Needs more air filter

RCraig 02-20-2009 08:45 PM

Hey another orlando member, welcome. Did you find that car on craigslist by chance?

patsmx5 02-20-2009 08:49 PM

Holy shit that turbo looks huge. Needs a bigger radiator and an air filter. And some tidying up in general.

samnavy 02-20-2009 10:09 PM

WOW! That's a pretty terrible build.

If the guy told you it was from a DSM, he was full of shit. DSM T25's are half that size. It's a big T3 or equivalent at a minimum.

Using a WOT switch to control the injector means that any time you are in boost but not at WOT, you are boosting on a completely stock fuel system because I don't see anything to indicate otherwise. Doing that is an instant recipe for a blown motor. I can't see how the thing has managed to survive if that's the case. The only thing that's probably saved that engine so far is 93octane avail in FL.

The size of the radiator probably means the thing runs stupid hot and the head gasket between cylinder 3-4 is hanging on by it's last ass hair.

What does the boost curve look like? When does it spool and how much does it make? If it runs any more than about 5psi, I'd loosen the wastegate arm and keep your foot off the gas until you can get some real engine management.

No matter what, you need wideband right now!

speedf50 02-21-2009 03:22 AM


Originally Posted by nicacus (Post 371730)
Needs more air filter

+1 Did he really sell it to you like that?

Rafa 02-21-2009 08:57 AM


Originally Posted by samnavy (Post 371756)
WOW! That's a pretty terrible build.

If the guy told you it was from a DSM, he was full of shit. DSM T25's are half that size. It's a big T3 or equivalent at a minimum.

Using a WOT switch to control the injector means that any time you are in boost but not at WOT, you are boosting on a completely stock fuel system because I don't see anything to indicate otherwise. Doing that is an instant recipe for a blown motor. I can't see how the thing has managed to survive if that's the case. The only thing that's probably saved that engine so far is 93octane avail in FL.

The size of the radiator probably means the thing runs stupid hot and the head gasket between cylinder 3-4 is hanging on by it's last ass hair.

What does the boost curve look like? When does it spool and how much does it make? If it runs any more than about 5psi, I'd loosen the wastegate arm and keep your foot off the gas until you can get some real engine management.

No matter what, you need wideband right now!


Wow Sam!

Whenever I need a diagnosis, I'm going to present you with pics :bowdown:

nicacus 02-21-2009 12:02 PM

I think we scared him away

turbo97 02-21-2009 03:53 PM

haha no i'm still here
yeah i know it needs work but i'm tyring, i'm new to turbo engines so any advice you guys have is welcome

sixshooter 02-23-2009 12:00 PM


Originally Posted by turbo97 (Post 371965)
haha no i'm still here
yeah i know it needs work but i'm tyring, i'm new to turbo engines so any advice you guys have is welcome

They can help you if you answer some of their questions and provide some close-up shots of all of the components of the turbo system. Lots of pictures will help your cause a great deal, and get you some more concrete advice.

magnamx-5 02-23-2009 01:27 PM


Originally Posted by turbo97 (Post 371965)
haha no i'm still here
yeah i know it needs work but i'm tyring, i'm new to turbo engines so any advice you guys have is welcome

You have a hell of a lot of learning to do man. Get on some reading etc and learn the basics throw us some more info and you will be more than happy with the car im sure. If not we can show u how to make it where u will stay happy.

keg97 02-23-2009 03:31 PM

Welcome!


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