DIY Turbo Discussion greddy on a 1.8? homebrew kit?
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$2000 turbo nitrous miata - good, bad ugly

 
Old 09-30-2018, 12:41 AM
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Default $2000 turbo nitrous miata - good, bad ugly

Hi guys,

I was searching for a nice 1.8 to start a build with but came across this 1990 1.6 that I wound up buying because it was inexpensive. At some point it looks like someone spent a lot of time and energy creating brackets and welding up custom piping. It all appears well done. The car also has a nitrous system installed with a fogger in the intake, 10lb bottle in the trunk, WOT switch, MSD window switch and purge system. I plan to basically pull all that out and sell what I can to recoup some money. Right now the car is running on the stock computer and a FMU. There is a narrowband and boost gauge added to the a-pillar. I've already bought a AEM wideband to swap in early next week. It's boosting 3-4 PSI and the narrowband is almost always in the "rich" portion of the gauge unless I am steady state light throttle where it bounces back and fourth like normal. Car also has a 1.8 rear end, not sure if torsen.

My plan is to buy some injectors, a fuel pump and fuel pressure regulator along with a megasquirt PNP and learn on this car. Some things I notice is the seemingly poor placement of the turbo inlet and a tight 90 degree inlet. I'd like to have the more experienced eyes take a look and tell me the good, bad and ugly of the current setup on the 1.6. I'm hoping to learn the tuning on this car and either swap in a 1.8 later or buy a different 1.8 car altogether that's cleaner. I'm hoping to get in the 200+WHP range with this car after the megasquirt and turning up the boost. I'm guessing it's running around 130-140 whp now? See the attached pics, i'd appreciate any comments on the current setup.
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00 turbo nitrous miata - good, bad ugly-img952018092495115048.jpg   00 turbo nitrous miata - good, bad ugly-img952018092495115051.jpg  
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Old 09-30-2018, 01:32 AM
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I think its a decent buy, it has an ok looking turbo kit and the body is clean.

get rid of all the crap, nitros, msd, afpr, afm etc...
get a megasquirt, bigger injectors, tune it and crank up the boost.
im sure it will make 200hp if the motor is healthy.

dont worry about the tight bend on the intake, youre not going for 400hp, so one sharp bend on the intake will not make a difference.
once you get rid of the afm, you can eliminate the second tight bend that goes to the filter.
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Old 09-30-2018, 07:04 PM
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Thanks Borka, kind of what I'm thinking. Glad to hear that bend will not be too detrimental. I'm not racing the car, it's just for street use and I'm not needing every ounce of power.... The body looks better in the pictures than in person, hood, front and rear bumpers and rear panel all have paint issues. There was a body kit on it so there are holes drilled. But it does not have major rust issues which is a big plus here in Wisconsin.

Anyone have any idea what turbo is on this thing? I'd like to find some people running similar setups to help me get a base map going. I still have a lot to learn as far as mega squirt goes. luckily I have a co-worker who is running mega squirt on his turbo fiero that's 400whp+ who knows what he's doing.

Thanks,
Nick
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Old 09-30-2018, 09:00 PM
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looks like some kind of T3 turbo, no ideal what kind though.

get flowforce 640cc injectors, ms3 and use the base map that comes included. that should get you started.
Then just autotune fuel and that would get you 90% of the way to a decent running car.

rest is just fine adjustments for starting, throttle tip in, AC compensation, etc...
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Old 09-30-2018, 09:14 PM
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That exhaust is looooow
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FlowForce 380 |640| 960 Injectors
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and complete kits
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including MS3Pro PNP
Bring your own boost - goflowforce.com
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Old 09-30-2018, 09:31 PM
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Also sticks out a good distance from the back of the car (looks dorky to me) and is loud for my taste.

A question on MSPNP2 vs 3 (and I know I have a lot of reading to do), what options does a PNP Pro provide to someone not running a VVT. The only thing I will probably do down the road or one day is swap in a 1.8 (probably not VVT). I do want to run sequential injection.

Thanks,
Nick
Attached Thumbnails 00 turbo nitrous miata - good, bad ugly-img952018092495123821.jpg   00 turbo nitrous miata - good, bad ugly-img952018092495123847.jpg   00 turbo nitrous miata - good, bad ugly-img952018092495123913.jpg   00 turbo nitrous miata - good, bad ugly-img952018092495123915.jpg  
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Old 10-01-2018, 08:15 AM
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You will need to add wires for sequential.

Otherwise this looks like a solid base. I would take as much appart as you dare ajd check everything out.

You also don't really need a fuel pump for 200hp.
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Old 10-01-2018, 02:29 PM
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that exhaust looks nasty AF, but the turbo setup looks surprisingly nice.
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Old 10-01-2018, 02:49 PM
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I think you're talking about the cleanly fabricated charge piping. cause the rest of it looks like poo, and is set up for fail-aids which makes it that much more like poo.
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Old 10-01-2018, 02:54 PM
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Originally Posted by 18psi View Post
I think you're talking about the cleanly fabricated charge piping. cause the rest of it looks like poo, and is set up for fail-aids which makes it that much more like poo.
yes, I should have clarified that....the charge piping looks good lol.
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Old 10-04-2018, 05:08 PM
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Nigelt - just ordered a set of 640cc injectors from your website.

MSPNP2 on its way along with a EBC solenoid. Wideband going in today or tomorrow. I'm curious to see where the AFR is with the FMU and stock injectors.
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Old 10-05-2018, 09:29 AM
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FWIW - Installed the wideband, under boost the AFR was 10.5-10.0, which looks to be the minimum reading of the gauge (0.00 volts). Looks like it's running rich but safe on the FMU. Going to verify timing next.
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Old 10-05-2018, 01:21 PM
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So...it was boosted at 3-4 psi, plus nitrous? What on earth is the point of that? Is it more stable?
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Old 10-05-2018, 01:23 PM
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So you can tell your friends you got a turbo wit nawz.
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Old 10-05-2018, 01:26 PM
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WHOA DAWG YOU GOT TERBO AND NAWZZZ???

that's so sicccc I bet it whips
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Old 10-05-2018, 01:40 PM
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Ah, well that makes total sense! I suppose it would also satisfy the inexplicable attraction of being able to enter "turbo mode" by flipping a switch...
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Old 10-05-2018, 02:22 PM
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You guys don't even know the best part. It purges right out front running light things with disco LED lights. Great for parties.

EDIT - you'll have to turn your monitor upside down to view images correctly. Not sure why it's doing that.
Attached Thumbnails 00 turbo nitrous miata - good, bad ugly-20181005_123437.jpg   00 turbo nitrous miata - good, bad ugly-20181005_123447.jpg   00 turbo nitrous miata - good, bad ugly-20181005_123503.jpg  
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Old 10-05-2018, 03:05 PM
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Ok, that is super ricer....


But I kind of want to do that now.
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Old 10-05-2018, 03:08 PM
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All the nitrous stuff is for sale - it could be yours!
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Old 10-05-2018, 04:34 PM
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does it come with 2 big ones? are you able to overnight in time for race warz?
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