A couple DIY questions
 

Hello everyone. I am new to the Miata scene. I am planning on buying a 1995 Miata 1.8 L. After reading I have come to realize a turbo upgrade is the most practical way to make power. I am not going to buy it all right now, however, I do not want to spend the 3000 it costs for a Flyin' Miata package so I have come to conclusion I want to create my own.

So far I am looking at:
- JGS Turbo Manifold with a T3 inlet pattern and external waste gate.
- TIAL 28mm Waste Gate. (should I use a 35mm, what's the difference)
- Turbo T3/T04e 57 Trim Turbo T3/T4 (. 50 A/R COMPRESSOR, .63 A/R TURBINE, .57 TRIM)

What I am looking for still are the:
- Intercooler
- Downpipe
- Turbo Dump pipe? (do I need one?)
- Intercooling piping
- BOV (recirculating)

My goals are to reach 200BWHP for the time being.

My main question is what I have listed in that I am looking at, are my goals reachable? If not, what should be changed or added?
My other questions pertains to what I am still looking for. If you could suggest what to buy for those five items that would be greatly appreciated as I cannot find very much information on those five items.

Thanks in advance,
Tom Dow


PS: I have one other question. I am slowly realizing I need a dump pipe from the turbo, and another from the external waste gate (correct me if I'm wrong) how would I go about mating them to the exhaust pipe down towards the cat/muffler? Welding it? Thanks again

Talk to begi and get some t3 manifolds and then forget the IC and go with WI and 200 whp is totally doable. You will need fuel to get there though your punny 250's wont get you to 200 whp without more FP. Or you can use bigger injectors by tricking your stock ecu or getting a piggyback or standalone ecu. Fueling and cooling are the major concerns on a turbo miata. The external WG can be made to merge anywhere you like in the exhaust stream. Oh and Welcome

Oh and you will need a clutch as well.

also consider the ETDracing.com manifold or BEGi manifold both with T3 footprints.

you could shave some cost and run a straight T3 Super 60, that would be more than enough to make your goals.

the bigger the wastgate, the easier to control (so i hear)

intercooler: lots of us use cheap Ebay intercoolers with great results. You could buy pre-bent piping from various sources (FM, BEGi, mx5projects.com)

Downpipe/Dump pipe: I believe that's reference to the same part. If you want your life to be easy, get a manifold/turbo/dp combo. Since you want a T3 footprint, the easiest route would be BEGi (See S5 combo). They make a great manifold and have a few downpipe options. If there isn't one specifically for your turbo, im sure they build one if you send the turbo their way. Otherwise, you're going to have to go custom. Which in itself isn't terrible hard, but if you have no access to a welder, or can't do it at all, you'll have a turbo kit ready to go and no way to drive it to a muffler shop.

bov: anything will work. Lots of people go with cheap Bosch and DSM bov's and they work fine. Recirc. is the simplest way to ensure you don't screw up the mixture and don't have idling problems with the AFM/AMF inplace.


and like richard says, your clutch needs addressing.

begi mani/dp combo, solve tons of headaches right there.

t3/t4 is wasted at 200whp.

:gay:

You mentioned a t3/t4 is wasted @ 200bwhp. What turbo would you suggest to reach 200whp with a little headroom to reach 250 bwhp in later stages?

Thank you again.

Also you mentioned WI I'm assuming that is water injection correct me if I'm wrong. Where would be a good place to source those parts needed.

thanks again,
Tom Dow

When i spoke of downpipes and dump pipes I was referring the top section and bottom section of the downpipe, are they the same thing, will i need both, or only one? Or will I simply need a downpipe with a adapter plate that mates the DP to my Wastegate dump

The straight t3 i suggested.

the devil's own water inection kit in the group buy section of the for sale/trade section.

Do you have a link to buying a T3 Super 60? I looked on ebay to no avail. Thanks again.

I will look into Devil's WI. Is it really as good as I'm reading. running boost levels near what is passable with an inter cooler, but without one?


Also I'm sitting here thinking about this downpipe thing. You said they are one in the same. However, when running an external wastegate you need to re enter the gasses expelled correct? Also there is a downpipe that connects to the turbine itself (opposite side of the air filter connection) correct? Do you run these two together further down the downpipe? thnak you sorry for so many questions.

this looks like one, perfect exhaust housing for an external wastegate:

http://cgi.ebay.com/ebaymotors/Garre...14573548QQrdZ1

This one is not the Super 60, but the regular 60 trim wheel is just .07" smaller inducer:

http://cgi.ebay.com/ebaymotors/Garre...05440306QQrdZ1


I still wouldn't buy any of these unless I knew it was a 60 or S60 trim wheel, have them measure it. WideOpenTuning can get a brand new T3 60 trim .48 with no wastegate for $565 from ATPturbo.com

Okay, I think I'm going with the T3 super 60 like you suggested. Do these turbo's internal or external wastegates. Would running an Internal waste gate be more simplistic in the long run? Should I simply do that?

WI to me is something you add after you get bored with your car's IC only performance. IC always comes first, it will always work no matter what.

the t3 can come with an internal gate, and these work fine at our level, and are simpler to plumb.

like i said, get a begi mani/dp combo. then all you need is IC piping and exhaust. the dp goes all the way from the turbo to under the car.

However, you're not thinking about the most crucial part yet, fuel and spark control. you have good spelling and grammar, so I'd recommend looking into Megasquirt.

so i should buy a stage from them? is that what you're saying? Or simply just the mani/dp?

depends, their kit is 3k or something, so you could save big by just buying the mani/dp. itll come to around $900 i think, but they're the best you can get aside from custom ($$$$). you could still finish the kit for around 2-2.5k. (which would be equal in performance to the 5000$ fm and begi kits.)

I haven't had any trouble with the internal, holding 12psi to redline. however, the wastegate dump when using the internal technically has little to be desired....there really isnt an option for a seperated wastegate dump and the the flow from the turbine and mix in a small little area before exiting into the DP

you can see what i'm talking about here:

http://www.magnaflowonline.com/image...boparts017.jpg

Brain, on that picture, the bottom mount is for the manifold, the mount on the floor is for the turbo (turbine) correct, and the one facing up connects to?

Okay, I email steph from Begi about a Manifold/DP. Now I will look for a Turbo(leaning toward super 60 if i can find a cheap one), and IC. any suggestions?

correct....pictured is the outlet to the downpipe. on the bottom is the flange for the manifold...and rest on the floor would connect to the CHRA assembly.


remember you can probably find regular 60 trim T3 easier...there is pretty much no difference in compressor maps:

http://www.turbocharged.com/catalog/compmaps/Fig4.gif http://www.turbocharged.com/catalog/compmaps/Fig5.gif

okay, with that all settled, I believe i am going to use an internal wastegate as to avoid the confusion from mating the wastegate exhaust and turbo exhaust.

BEGI is the way to go you all seem to tell me, I am going to look @ them now for prices.

What size inter coolers are acceptable for the 95' Miata with Air Conditioning?

And does anyone sell rebuilt or used T3 Super 60 Turbos? Or another turbo with the same flange that will make ~200 BWHP without stressing too much PSI?

Tom, Give me a call. I sent you an email with my #

$464.00 p/n 60061 1.8L, T3 Turbo
$385.00 p/n 60004 for Stainless Steel, '94 to '97
$285.00 p/n 60004MS for Mild Steel Downpipe, '94 to '97

Are these the prices I was looking for. How do I know if the downpipe is made for a external/internal wastegate.
currently at work at the moment.