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

Postby nelson240sx » Wed Feb 06, 2019 10:49 am

this is cool, some home brew projects
KA24E-T 06/06 to 10/09 (T25 then H1C Holset) - sold
KA24DE-T 12/09 to 10/11 (T4/TO4E) - sold
KA24DE-T 11/14 to 8/15 (T4/TO4S BB) - sold
SR20DE-T exo-car build 06/13 to current (EFR6758) - swapped
^ now VH45DE-T (Billet T04S BB)
Miata 1.8 turbo 9/15 to 3/17 (VF39) - sold
KA24DE-T build 8/17 to current (EFR6758)
Burning corn since '09
http://www.e85forum.net
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Mon Feb 11, 2019 10:08 pm

s14fiend wrote: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?


Yes, one of the vacuum setup's main advantages is that it keeps the oil cleaner. And I'm hoping the motor will last longer as a result.

nelson240sx wrote:this is cool, some home brew projects


Thanks man.


The new vacuum pump is working great so far. Since it wasn't causing much of a drain electrically, I went ahead and bumped the motor speed up to the max, which pulls -7 inHg. I have yet to see the tank get less than -4 inHg, and it only does that for a moment before the vacuum pump is activated and gets it back to -7. I also haven't blown the dipstick out yet.

I can hear the pump as it kicks on. It's faint, but it sounds so cool, and it is so satisfying to see the vacuum in the tank jump so quickly from -4 to -7 inHg and just stay there as I continue accelerating.

What's cool is that I ALWAYS have vacuum in my crankcase now, and 98% of the time, it's a completely passive system.

It's been a learning process and a lot of trial-and-error getting this vacuum setup sorted out, but I couldn't be more pleased with how it is working right now.
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 nelson240sx » Thu Feb 14, 2019 10:48 am

How much power is she making? That's impressive that it maintains vacuum while getting beat on.

I'm torn on what I want to do as far as crankcase ventilation on my new setup. I'm currently recirculating into the turbo inlet, but with the new build being high compression turbo I'm worried about it lowering the octane if I keep it the same and causing detonation. Might vent it into the exhaust or just do an atmosphere setup.
KA24E-T 06/06 to 10/09 (T25 then H1C Holset) - sold
KA24DE-T 12/09 to 10/11 (T4/TO4E) - sold
KA24DE-T 11/14 to 8/15 (T4/TO4S BB) - sold
SR20DE-T exo-car build 06/13 to current (EFR6758) - swapped
^ now VH45DE-T (Billet T04S BB)
Miata 1.8 turbo 9/15 to 3/17 (VF39) - sold
KA24DE-T build 8/17 to current (EFR6758)
Burning corn since '09
http://www.e85forum.net
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Tue Mar 19, 2019 8:43 pm

Oh, its around 350-380 whp on pump gas, close to 500 on E85.

I just started adding ethanol back into the tank after going the entire winter without it. I'm up to 71% ethanol on this tank. I also cranked the boost up to 22 again. She rips!!!!!!!!!

I had some fun the past week or so and while I haven't pushed the dipstick out significantly, it has gotten pushed out a tiny amount. It's like a 16th of an inch, if that. But that's enough to drop my vacuum in my PCV tank from -15 to -11 at idle. It is still working so much better than it was previously. I'm no longer getting the big puff of smoke from under the hood as the dipstick blows out. Now, it's just barely pushing it. I don't see any smoke when it does it either.

There is still a little vacuum in the tank when this has occurred, so it looks like I'm just not getting the blow-by into the tank quickly enough. I'm thinking that a second -8AN line from the valve cover vent (which is currently plugged) to the vacuum tank may fix it. Other options include figuring out a way to lock the dipstick down. Or, I could figure out a way to bump the voltage to my vacuum motor to around 20V, at which point it should pull close to -10inHg. Also at that point, the pumps compressor wheel could explode... lol. Hopefully not, but it was never designed to spin @ 3-4 times the speed I will need to spin it to. And lastly, I could try replacing the motor with one with a slightly higher KV, which means it would spin at higher RPMs.
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 nelson240sx » Tue Apr 02, 2019 9:58 am

Need a video walk around of this thing in action. Want to see/hear the tank charge up and see how she pulls
KA24E-T 06/06 to 10/09 (T25 then H1C Holset) - sold
KA24DE-T 12/09 to 10/11 (T4/TO4E) - sold
KA24DE-T 11/14 to 8/15 (T4/TO4S BB) - sold
SR20DE-T exo-car build 06/13 to current (EFR6758) - swapped
^ now VH45DE-T (Billet T04S BB)
Miata 1.8 turbo 9/15 to 3/17 (VF39) - sold
KA24DE-T build 8/17 to current (EFR6758)
Burning corn since '09
http://www.e85forum.net
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Re: Adam's formerly supercharged... now soon-to-be-turbo'd,

Postby adamky » Sun Apr 07, 2019 8:08 pm

I can definitely do a walk around vid soon.

I have an update on the situation. It seemed like it started blowing out the dipstick more and more easily and I wasn't sure why.

So, for the heck of it, I decided to empty my vacuum tank for the first time in 6 months (maybe more, I'm not sure). Well, I was very surprised to see that it had almost 3 GALLONS! of water, oil and fuel in it (mostly water, of course)!! I couldn't fcuking believe how much fluid just kept coming out. That nasty stuff would have been in my oil...
Image


Its only a 7 gallon tank, so it was almost half full. I believe that the huge reduction in volume was causing my dipstick to constantly pop out on long highway pulls because the vacuum reserve was being depleted so quickly. I haven't blown the dipstick out since emptying the tank.


That being said, I am still going add a second -8AN line from the valve cover to the tank. I am very confident that the second line will allow the vacuum pump to pull the blow-by out fast enough to keep the crankcase from getting pressurized, even if I crank the boost up more... which I fully intend to do...
Wiseco/Eagle, JWT S1 cams, BC valve springs, PT5857, ID1700 injectors, SR20DET ECU w/ Nismotronic, etc, etc...
--> YouTube channel --> my build thread
Image
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