Adam's formerly supercharged... now soon-to-be-turbo'd, S14

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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Tue Jan 24, 2017 4:08 am

Updates! I've been adding more and more ethanol into my tank and it looks like the winter blend for this area is 75% ethanol. Not bad. I love having an ethanol gauge and I love that my ECU is automatically adjusting the tune for me. I'm pretty sure that with Nismotronic, I can set not only the fuel and timing adjustment, I can also set boost duty cycle. Meaning that my boost will automatically raise or lower depending on ethanol content.


Back to work on the Nismotronic upgrade. I decided to just go straight to the LS2 coils and will sell my VQ coils. Here's a quick bracket I fabbed up that will attach to existing screws on the upper timing cover. And then I will take my coil bracket and screw it to that plate. Wiring can be hidden behind the bracket on the valve cover.
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*Daily-driven* PT5857 @ 20psi, 1600cc Bosch, Nistune w/ flex fuel, etc...
--> YouTube channel --> my build thread
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby hooligans661 » Wed Feb 01, 2017 3:07 am

Looks awesome!
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby cleantune » Wed Feb 01, 2017 1:18 pm

Nice work on the custom mounting bracket! That Nismotronic system seems like it was a great investment; just seems like it has so much capability and room to adapt to new modifications.
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Thu Feb 16, 2017 5:04 pm

The wastegate is acting up again. Seems to be stuck closed. Noticed it was pulling really hard the other day, which was weird because I was in low boost on my EBC. So, I turnd the EBC off completely and then got on it to see how much boost it was seeing and I saw it quickly go over 20 psi.. actually saw it hit 26 right as I let off. It spooled so hard and fast that I couldn't get off of the throttle fast enough.

Needless to say, if my motor wasn't built and I wasn't running E85 with big injectors, this motor would probably be toast. I clearly need to set up some overboost protection while I'm working on the wastegate issue.
*Daily-driven* PT5857 @ 20psi, 1600cc Bosch, Nistune w/ flex fuel, etc...
--> YouTube channel --> my build thread
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby cham » Thu Feb 16, 2017 6:36 pm

I've always had a bad spring in my hallman manual boost controller. I raced a mustang gt and went and estimated 145mph because he told me he was running 140 and I had 3 or 4 cars on him. I looked at my boost gauge b4 I let out and I was well over 23psi and my Afr was in the 12's. It was a cool night, e85 . I truely believe the e85 saved my engine as well.
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby cleantune » Fri Feb 17, 2017 4:17 pm

Man, sorry to hear that. Is the WG line collapsing with heat or pinching?

A long time ago when I was looking for vacuum lines I stumbled upon a company that makes a thick-walled silicone vacuum hose:
http://www.boostcontroller.com/TurboLog ... s/2128.htm

The lines I'm using are super close to the non-coated bare metal exhaust manifold and have been like this for at least 3 years. I vaguely remember talking to someone from the company and the only precaution/ tip they gave was to add a little extra length, so the ends could be trimmed if the ends start to wear (I don't think I've had to do this though).
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Sat Feb 18, 2017 2:44 am

Wastegate lines are all stainless braided PTFE. None of them appear to be kinked and all of the fittings are on there tight. First thing I'll do is boost leak test everything. If that checks out and the solenoid is working correctly, the WG is going to have to come off. Which means the turbo & DP will have to come off. This wastegate was serviced by Precision a while back because the valve was sticking open, so I bet there's something like that going on again.

I'll have more info after I tear into it this weekend.
*Daily-driven* PT5857 @ 20psi, 1600cc Bosch, Nistune w/ flex fuel, etc...
--> YouTube channel --> my build thread
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby mewantkouki » Sat Feb 18, 2017 6:52 am

I thought this car had a hobbs pressure switch?
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Sat Feb 18, 2017 2:04 pm

It does. It's only a 5 psi switch and it's used to activate the boost-a-spark.
*Daily-driven* PT5857 @ 20psi, 1600cc Bosch, Nistune w/ flex fuel, etc...
--> YouTube channel --> my build thread
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby nismo_dreaming » Sat Feb 18, 2017 2:49 pm

Love the LS2 bracket you came up with man. I went with something much simpler with mine, and always wished Id taken the time to do it right.

I recall one time where I boost crept to 25psi and saw AFR's hit 12.2 (was running 120lb inj on 93, and it was a cold night thank god).... Felt like I was being pushed by an 18 wheeler it came on so hard and fast lol.
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby cham » Sun Feb 19, 2017 12:59 pm

So I'm not alone.lol
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Sun Feb 19, 2017 10:01 pm

So check this out. As I was pulling the wastegate off, I heard a klank and looked down to see the wastegate valve on the ground. Umm, that's not normal.
I took it apart and there are the 4 set screws that secure the diaphragm to the valve, just banging around loosely on top of the diaphragm. That explains the valve falling out and it also explains something else... when I had boost-leak tested the car earlier, I couldn't figure out why I was getting boost all the way through the wastegate. I figured the diaphragm had popped out or gotten damaged somehow, but luckily that wasn't the case. It was just blowing through the screw holes.

As for the screws backing out... I know that I put them on tight. I know I did. What I didn't do is clean them and re-apply threadlocker, and I'm guessing that was my issue. I cleaned it all up and applied some high temp threadlocker called Resbond, which I had left over from my Inconel turbo stud kit. Unlike other thread locking compounds, it holds up to high temps very well. I put the screws in good and tight with the Resbond, got it all back together, and she's back to normal now. I actually thought something was wrong on the first drive. I couldn't understand why it felt so slow. And then I realized the boost controller was just off. :mrgreen: Even low boost, 12 psi, feels so slow now.

I'm starting a new job this week, so updates are going to come more slowly. But I am determined to get the car on the Nismotronic SR ECU soon.
*Daily-driven* PT5857 @ 20psi, 1600cc Bosch, Nistune w/ flex fuel, etc...
--> YouTube channel --> my build thread
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