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Old 06-25-2018, 03:59 PM   #1  
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Welcome everyone to my build thread.

If your curious about me you can find my introduction thread here.

Just to give you a quick overview. I plan to build my car in four phases.
phase 1) Collect/ design parts
phase 2) build car to 230 hp
phase 3) collect/ design more parts
phase 4) build car to 350hp
phase 5)????
phase 6) profit

Installed parts list:
Flying Miata happymeal clutch
Revlimiter gauges
Trucklite LED headlights

Planed parts list:
Holset H1C with Hx35 turbine housing
Trackspeed cross flow radiator
coolant reroute
Ebay IC
Ebay Cast manifold
Custom QSV
Custom shift ****
flowmaster dbx muffler/ custom 2.5in exhaust with v bands

I will try my best to keep this up to date with everything I am doing with my car, including all the parts I buy and all the stuff I make.

So I'm starting with a 97 miata with lsd. Car was bought with 130,000 miles on it and since buying it I have put 15,000 more on. I drive too and from New York roughly once every other month, so I get to "enjoy" some long drives in the car. I think that everyone here has seen a red miata before so I won't bother with a picture of the unmodified vehicle.

The first couple mods I made were quality of life and I'll include them here just to get them out of the way.

First mod I did was to get some Rev Limiter gauges. I went with the EB with white LED's makes the car look a lot more modern inside. Adam was great to work with and he even made me some custom badges and a steering wheel button for me. I will warn others that you should follow the instructions carefully. I over tightened the screws and messed up the paint on the gauge faces a bit. Learn from my mistakes and listen to Adam's instructions. Love the gauges, high recommended would buy again.








And of course I forgot a screw when putting it back together.



Second mod was to get some LED headlights. I ended up getting the trucklite LED headlights. These things are awesome. The light output is way better than stock and I drive long distance regularly this makes night driving way better.



I also ended up finding so rust on the side sill and I had to grid it back and fill it in. Turned into a decent sized hole.




I found a dent on one of the frame rails which I suppose was from putting the jack stands in this location.




I also found so weird holes in my trunk any ideas on what these are?



Next post I'll get onto the good stuff; turbo parts and some of the parts I am designing.
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Old 06-25-2018, 06:15 PM   #2  
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Gauges and white LED's look good.

Welcome to the MT.
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Old 06-26-2018, 06:37 AM   #3  
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As someone who has used an H1C with a custom hotside on a 1.6 I recommend against it. Unless you are trying to make 350-450whp it is just too laggy, even then there are better turbos for that power level.
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Old 06-29-2018, 02:39 PM   #4  
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Yeah I totally agree that an H1C is not the right turbo for this car even with a modified hotside. I got the turbo for free which is why I am using it. To keep cost down I am going to run with it for now and it might work well for when I go for 350 whp, but even then when I get some more money and I have the system up and running I may go buy an EFR.
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Old 06-29-2018, 04:03 PM   #5  
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The idea that it is reasonable to design a turbo kit around a turbo that one has procured for free has frustrated many folks when it comes to piecing things together. There are so many churbos that folks have had good results with that it would honestly make more sense for you to sell your turbo and get something more well suited for the application.
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Old 06-29-2018, 04:31 PM   #6  
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Alright finally had some time to take some pictures.

I replaced my valve cover gasket and CAS oring cause I was leaking a little oil. The valve assembly looked okay but I'm not super experienced with whats excessive wear and what isn't. I'd love to hear if I bought a lemon or not.



Also got a chance to install my revlimiter oil cap. Love the look of it. I do want to repaint the valve cover wrinkle black at some point.



My cast manifold showed up and I painted it with header paint to stop rust. I know these cheap manifolds don't flow super well and the mating surfaces aren't usually well made. Luckly for me I have access to a surface grinder so those mating surfaces will be nice and flat. I could even lap the matting surfaces on a block of granite to make it perfect, but I really don't think that is necessary. This manifold is part of how I want to fix my spool issue. A poor flowing manifold should hinder flow and thus pressure will build in the manifold. A higher pressure differential should help spool on the low end but will limit top end power. I'm okay with that as I'm already not going to be making the HP that the h1c is capable of. I also plan to hone the runners to improve flow somewhat, but I'll do that when I'm doing the build. I looked into making my own extrude hone paste but it seems a little to complicated. I'll also probably remove the header pain and get a ceramic coating before the build, but in the mean time I wanted to protect the surface.




I also like the look of the "heat shield" that comes with it. It's got a nice retro feel to it. I know it will do nothing to stop heat spread and thus I'm going to make my own, but I do like the aesthetic of the plate.



@1RMDave, If you have any memory of your spool rpm and psi I would like to hear it. Using it as a reference would be helpful for me when designing parts. I know there is a spool data thread as well and I'll probably go look in there too.

@ridethecliche, you are probably right that a Chinese turbo might be a better route for finding a cheap alternative to meet my power goal. I am a little worried about reliability and I feel like quality control is always an issue with cheap turbos. I know that the H1C is not properly sized, but I am kind of having fun designing solutions to a problem I made myself. And I know its a really reliable turbo, not very efficient but reliable. I will eventually drop some money on a quality turbo.
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Old 06-29-2018, 05:59 PM   #7  
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MKTurbo uses a churbo. Look there for first hand reviews on reliability. I'm sure Lars will sell you one.
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