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noob boosts 1.6 instead of 1.8 swap
I've been around the forum for a little over a year and this thread is a couple months past due. It's been hard to work up the courage to start this thread because so many of you have amazing builds and honestly mine is pretty ghetto. I've made a post in the meet and great and it was pretty unspectacular. I don't expect much out of this one either.
I have watched many of you build simple DIY turbo'd cars and it's always something I thought I could do. So I figured I would give it a shot. This past winter my fiancée at the time bought me the AHP AlphaTIG 200X on my recommendation after seeing the great results many of you had here. I wanted to model my build after the MKTurbo as much as possible because of all the wonderful results documented here. Mine is based on a T25 over the T3 because I wanted to go with an SR20 turbo and since I still have a 1.6 I wanted the spool to be as good as possible. My exhaust is a full 3 inch without a cat or resonator and paired with everyone's favorite muffler. Aluminized steel with stainless vbands. Photo dump incoming. https://cimg0.ibsrv.net/gimg/www.mia...2f178c72bf.jpg https://cimg1.ibsrv.net/gimg/www.mia...bc8e388e38.jpg https://cimg2.ibsrv.net/gimg/www.mia...f01b763b3f.jpg https://cimg3.ibsrv.net/gimg/www.mia...df69f10e58.jpg https://cimg4.ibsrv.net/gimg/www.mia...80dd9015f7.jpg https://cimg5.ibsrv.net/gimg/www.mia...414c0cbcc9.jpg https://cimg6.ibsrv.net/gimg/www.mia...92ac180264.jpg https://cimg7.ibsrv.net/gimg/www.mia...010f7c398a.jpg https://cimg8.ibsrv.net/gimg/www.mia...8241bd9e68.jpg https://cimg9.ibsrv.net/gimg/www.mia...8f52de512e.jpg https://cimg0.ibsrv.net/gimg/www.mia...7c19fb0738.jpg https://cimg1.ibsrv.net/gimg/www.mia...344e281ed2.jpg https://cimg3.ibsrv.net/gimg/www.mia...abbd204b9a.jpg https://cimg4.ibsrv.net/gimg/www.mia...d5e44356fe.jpg https://cimg5.ibsrv.net/gimg/www.mia...01dffe5d92.jpg https://cimg6.ibsrv.net/gimg/www.mia...48c82dd330.jpg https://cimg7.ibsrv.net/gimg/www.mia...61f6db6dac.jpg https://cimg8.ibsrv.net/gimg/www.mia...ad76b864ff.jpg |
Next set of photos is the intercooler piping. Its all 2.5 inch aluminized steel because I still suck at welding aluminum. Using the recommended Vibrant intercooler.
https://cimg9.ibsrv.net/gimg/www.mia...4c3bd84738.jpg https://cimg0.ibsrv.net/gimg/www.mia...b9d50b0d83.jpg https://cimg1.ibsrv.net/gimg/www.mia...5ad67b9636.jpg https://cimg2.ibsrv.net/gimg/www.mia...005e0c8cc6.jpg https://cimg5.ibsrv.net/gimg/www.mia...c16de895df.jpg https://cimg7.ibsrv.net/gimg/www.mia...656a3be319.jpg https://cimg8.ibsrv.net/gimg/www.mia...9f0088256c.jpg https://cimg9.ibsrv.net/gimg/www.mia...ce89ec0635.jpg https://cimg0.ibsrv.net/gimg/www.mia...440bbe8acb.jpg https://cimg1.ibsrv.net/gimg/www.mia...c72cc1740a.jpg https://cimg3.ibsrv.net/gimg/www.mia...65dc1f6169.jpg |
Custom wrench for water lines on turbo.
https://cimg9.ibsrv.net/gimg/www.mia...ce32d7d363.jpg FM1 clutch https://cimg1.ibsrv.net/gimg/www.mia...265bcba155.jpg |
Before I swapped the clutch I ran with the SR20 turbo for a bit with the wastegate open and quickly learned it needed rebuilding. I didn't want the car to be undrivable during this time so I bought an ebay turbo. The spool is ok. Will post logs later.
Here is what it currently looks like. https://cimg5.ibsrv.net/gimg/www.mia...90dbac1ac0.jpg https://cimg7.ibsrv.net/gimg/www.mia...f7bc378d45.jpg |
My plans for the future are to continue driving the car as is for the rest of summer slowing tweaking and adjusting things as needed. Build an MS3x this winter. Next summer search for VVT motor and turn up the boost until the 1.6 breaks. So many things I will change on the next go around. I opted to stay with the 1.6 for now because I wanted to learn how to do things and it made sense to learn on a motor no one cares about.
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Great work dude. Was this your excuse to learn to tig? What are you using for fuel control?
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Looks good. Hopefully you found it easy to copy my setup. This is exactly how you DIY it and do it on the cheap.
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Originally Posted by ryansmoneypit
(Post 1430593)
Great work dude. Was this your excuse to learn to tig? What are you using for fuel control?
Originally Posted by shuiend
(Post 1430598)
Looks good. Hopefully you found it easy to copy my setup. This is exactly how you DIY it and do it on the cheap.
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1 Attachment(s)
Here is a virtual dyno I did yesterday. I am guessing on the weight of the car. No ps/ac, roll bar, kirkey seats, torsen, 6uls.
https://cimg9.ibsrv.net/gimg/www.mia...d00be4ad02.jpg I attempted to attach the log of the pull. If it didn't attach or don't want to open the here is some spool data: I had trigger logging enabled and the set point was 60% TPS. At 65% TPS I was at 1739 RPM and was at full throttle at 1800 rpm, was shooting for 2000 rpm but clearly, I was excited. 1800 : 105 kPa = 0.7 psi 2046 : 115 kPa = 2.1 psi 2379 : 122 kPa = 3.2 psi 2665 : 129 kPa = 4.2 psi 2794 : 136 kPa = 5.2 psi 2914 : 143 kPa = 6.2 psi 3016 : 150 kPa = 7.2 psi 3126 : 157 kPa = 8.2 psi 3259 : 164 kPa = 9.2 psi Boost tapers here until 4229 RPM when I start to creep. I creep to 191 kPa (13 psi) and stay there for the remainder of the pull. I have already ported this turbo wastegate once but left plenty on the bones because it was my first time doing so. Looks like I need to revisit that. Overall I think I can be pretty happy with the spool for a 1.6 with a turbo that's probably a bit too big. I'm using basically a stock ignition map. |
I honestly wouldn't bother porting any more. In fact, I'd probably just turn up the boost and even it out so it's 13 everywhere.
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Originally Posted by 18psi
(Post 1431157)
I honestly wouldn't bother porting any more. In fact, I'd probably just turn up the boost and even it out so it's 13 everywhere.
Is that logic flawed? If I creep to 13 and boost holds there does that basically mean that's the upper limit of my creep? |
I've seen rare occasions where what you're proposing happening, but rarely and only if there's another problem too. But for the most part, and according to design, it shouldn't. An MBC, or properly tuned closed loop EBC specifically works around a problem such as this. Plenty of small turbo 1.6's to 14 even 15psi without any issues, because look at how little power/torque you're actually making.
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alright cool, thanks for the info. I'll do some more research and give it a shot.
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So I finally wired up sequential injection. I know I should have done it from the start but was too scared of messing it up. I figured if I could turbo the car, I could add two freaking wires. It really was quite simple. In case anyone who hasn't done it yet comes across this, this is what I did.
I bought two of these Injector Connector Kit. Ballenger Motorsports is awesome and has a compiled list of Miata connectors. I found it in the connector witch-hunt thread but gonna post it again here. Also borrowed a from work for the connectors in the kit. I have an MS2e so I needed to switch some stuff around for it.
Originally Posted by Reverant
(Post 1341380)
Remove jumpers JP4 and JP5.
Install jumpers on JP7, JP8, JP9, JP10. Change the settings to use additional drivers (from standard drivers) and sequential injection. 4U = Cyl 1 4V = Cyl 2 4Y = Cyl 3 4Z = Cyl 4 |
I decided I hated my ugly TPS bracket and hi_im_sean was gracious enough to give us his design so I figured I would print one.
Originally Posted by hi_im_sean
(Post 1426457)
Yea you have two choices on ground, either end of the element, and since the factory harness lands on one of those, no need to open the TPS. I didn't think of the PNP type ECUs that don't utilize an adapter harness that allows you to customize where the wires go, but... I still think it'd be easier and cleaner to re-pin the TPS connector, or ECU connector than to modify the TPS itself. Also saves your warranty since we seem to kill a lot of TPSs on our cars.
https://www.thingiverse.com/thing:2425389 https://cimg4.ibsrv.net/gimg/www.mia...2526ae19ea.jpg |
https://cimg2.ibsrv.net/gimg/www.mia...9c6fe14ec5.jpg
https://cimg3.ibsrv.net/gimg/www.mia...d2afd99c35.jpg Installed some sport brakes this past weekend that I got from turbofan. I knew they were gonna be bigger than my stock NA6 brakes but damn! The new rear rotors are bigger than the old front rotors. |
Great thread, very helpful for those of us trying to DIY our way to a turbo 1.6. I'm thinking about a T25 too, are you planning on a dyno visit once everything is done? I'd be excited to see.
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Thanks. Turbo'd 5000 miles+ and I do not plan on visiting a dyno. I would rather put that money towards an MS3x or K series. Not worth it on a 1.6 IMO.
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How do you like the sport brakes compared to the stock 1.6 brakes? Did you also change out the booster and master cylinder? I have a whole sport setup sitting in my shop, but I haven’t installed it due to lack of availability of track pads. I’ve been running the stock 1.6 brakes with Stoptech/GLOC pads without issues. I’ve been putting off sequential injection, but it sounds like it’s worth it just to get the idle right. I’ve been tuning for months, and the idle is still not as good as I would like. AFR bounces around quite a bit when warm. |
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