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

This is for all those PICTURE THREADS ONLY. Motor installs, product writeups, showing off your car, put the thread in here.

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

Postby adamky » Mon Sep 03, 2018 12:53 am

Wiseco/Eagle, JWT S1 cams, BC valve springs, PT5857, ID1700 injectors, SR20DET ECU w/ Nismotronic, etc, etc...
--> YouTube channel --> my build thread
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby p00t » Tue Sep 25, 2018 9:14 pm

Still kicking ass. Nice kills!
KA24DETT still alive
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Sun Jan 20, 2019 11:11 pm

I guess I'm overdue to post some updates. I'm now at over 168K on the odometer, which means I have 13,000+ miles on this motor so far. (The rebuild was at 155,111 miles, which was in September of 2016). She is still kicking a55 and going strong!!



So, after d!cking around with this for well over a year, I FINALLY have the brushless vacuum pump setup all installed in the car and working. The vacuum pump itself is a huge step up over the old brushed motor. It screams at full throttle. It pulled -7.5 inHg on my test bench, which is twice the vacuum that the old one could pull. I think it may actually be able to keep up with higher boost levels (and the resultant increase in blow-by) that the old brushed motor simply couldn't handle. If it doesn't, I have a backup plan. So, we'll see...

I mounted my 2 relays, my Electronic Speed Controller, a 50 amp breaker, and my hacked servo tester to a scrap piece of aluminum and mounted the whole thing to the side of the trunk just above my battery box.

One relay controls main power to the ESC and servo tester. The other relay simply closes a connection that forces the servo tester to speed the motor up to whatever speed I specify. The speed can be changed using a 1/4 watt resistor that can be swapped out.

The whole thing is programmed to activate whenever intake manifold pressure is above -2 inHg and the vacuum in the tank is BELOW -4 inHg. Once activated, it pulls a solid -6 inHg and stays on until either the intake manifold vacuum drops below -2" inHg, or the vacuum in the vacuum tank gets below -8 inHg.



To sum it up.... anytime the intake manifold is under boost and the vacuum tank is below -4 inHg, the pump will be active, ensuring that there is constant vacuum in the tank (and the crankcase). And this will hopefully keep my dipstick from blowing out on long 4th and 5th gear pulls.

So far, the vacuum pump doesn't seem to hit the electrical system too hard on activation, which is good. And voltage only dropped like 0.1-0.2 volts while it was running. I was kind of worried it was going to be more of an electrical drain than what it it is.


Pictures:
Image
Image
Image


In addition to the pump, I installed an additional one way check valve going to the vacuum pump with a junction pipe connecting the two outputs together. This is because I realized that there was a good chance that using only one valve was limiting how fast I could pull air out of the tank. The check valves open at a very low cracking pressure, like .5 psi, but they don't seem to flow a lot of air once open. Hopefully the combination of the brushless pump as well as the additional valve will fix this and I can refocus on tuning this b!tch on speed density!

Here's the additional one-way valve installed with the junction pipe connecting the two together:
Image
Image
Wiseco/Eagle, JWT S1 cams, BC valve springs, PT5857, ID1700 injectors, SR20DET ECU w/ Nismotronic, etc, etc...
--> YouTube channel --> my build thread
Image
adamky
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Posts: 3497
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Location: Louisville, KY

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

Postby s14fiend » Mon Jan 21, 2019 12:34 pm

adamky wrote:I guess I'm overdue to post some updates. I'm now at over 168K on the odometer, which means I have 13,000+ miles on this motor so far. (The rebuild was at 155,111 miles, which was in September of 2016). She is still kicking a55 and going strong!!



So, after d!cking around with this for well over a year, I FINALLY have the brushless vacuum pump setup all installed in the car and working. The vacuum pump itself is a huge step up over the old brushed motor. It screams at full throttle. It pulled -7.5 inHg on my test bench, which is twice the vacuum that the old one could pull. I think it may actually be able to keep up with higher boost levels (and the resultant increase in blow-by) that the old brushed motor simply couldn't handle. If it doesn't, I have a backup plan. So, we'll see...

I mounted my 2 relays, my Electronic Speed Controller, a 50 amp breaker, and my hacked servo tester to a scrap piece of aluminum and mounted the whole thing to the side of the trunk just above my battery box.

One relay controls main power to the ESC and servo tester. The other relay simply closes a connection that forces the servo tester to speed the motor up to whatever speed I specify. The speed can be changed using a 1/4 watt resistor that can be swapped out.

The whole thing is programmed to activate whenever intake manifold pressure is above -2 inHg and the vacuum in the tank is BELOW -4 inHg. Once activated, it pulls a solid -6 inHg and stays on until either the intake manifold vacuum drops below -2" inHg, or the vacuum in the vacuum tank gets below -8 inHg.



To sum it up.... anytime the intake manifold is under boost and the vacuum tank is below -4 inHg, the pump will be active, ensuring that there is constant vacuum in the tank (and the crankcase). And this will hopefully keep my dipstick from blowing out on long 4th and 5th gear pulls.

So far, the vacuum pump doesn't seem to hit the electrical system too hard on activation, which is good. And voltage only dropped like 0.1-0.2 volts while it was running. I was kind of worried it was going to be more of an electrical drain than what it it is.


Pictures:
Image
Image
Image


In addition to the pump, I installed an additional one way check valve going to the vacuum pump with a junction pipe connecting the two outputs together. This is because I realized that there was a good chance that using only one valve was limiting how fast I could pull air out of the tank. The check valves open at a very low cracking pressure, like .5 psi, but they don't seem to flow a lot of air once open. Hopefully the combination of the brushless pump as well as the additional valve will fix this and I can refocus on tuning this b!tch on speed density!

Here's the additional one-way valve installed with the junction pipe connecting the two together:
Image
Image


Good to hear someone is still wrenching on these things.... keep us posted no the progress and results.

I take it this would theoretically let the engine and engine oil last longer?
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