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Old 11-28-2017, 01:17 AM   #401
NSFW
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How different was the low end on your 2JZ / S366 setup as compared to a typical 2JZ / S366 setup? I mean, did boost come on 500 RPM sooner? Or 100, or 1000?

I've been thinking about doing this in my LGT with a GTX3576 next year. Thing is, I have a GT3076 right now that hits full boost at about 4k, and I'm pretty satisfied with it... more power would be nice, but not if it means having the power come on any later. The GTX 3071 / 3076 don't seem to be a big enough difference to be worth the trouble. But a GTX3576, with a valve like this? Maybe.
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Old 11-28-2017, 06:11 PM   #402
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Quote:
Originally Posted by scotte30m3 View Post
I had one on my 2jzgte s366 single swap and it was awesome! Put down 430rwhp and a super flat TQ curve from 3500rpm through to 6k.

Thought about do this with my FA20dit... ��
Awesome? Why was is held to only 430whp? Most of our 2jz builds are much more than that, so the qsp feels even worse the more power and rpm that you go.

On small boost like that I can see that you wouldn't feel the downsides as much, other than holding back power from 6000-9000rpm range. Normally they are very slow to re-spool between shifts or during part throttle track type settings. One good example was an owner that ended up going to a small turbo with a qsp from an old school laggy big single, made about 450whp, didn't like the rubber-band feel, so went to a bigger turbo without the qsp, made in the 600s, spooled much later but loves the response now. You get much better engine response with the relative openness of a bigger turbine. the qsp chokes that a bit while trying to increase boost earlier.

Just two different ways to set up a car, glad you liked it.
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Old 11-29-2017, 03:23 PM   #403
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Originally Posted by NSFW View Post
How different was the low end on your 2JZ / S366 setup as compared to a typical 2JZ / S366 setup? I mean, did boost come on 500 RPM sooner? Or 100, or 1000?

I've been thinking about doing this in my LGT with a GTX3576 next year. Thing is, I have a GT3076 right now that hits full boost at about 4k, and I'm pretty satisfied with it... more power would be nice, but not if it means having the power come on any later. The GTX 3071 / 3076 don't seem to be a big enough difference to be worth the trouble. But a GTX3576, with a valve like this? Maybe.
an s366 on a 2jz with cams, big exhaust, and pump gas (not ethanol) will spool on a dynapack at around 4500rpm, on a dynojet/street this will be around 4000rpm.

At his power level if he had flat torque as he stated he was making 375wtq, so a 175wtq increase from what a 2jz puts out a low rpm (2000-3000rpm) in vacuum (200wtq) it would fee like it spool instantly, at any rpm. Taking the valve out and making an instant 50whp more and the ability to make power to over 7500rpm would make the car infinitely faster and also feel snappier at low revs. It would just take a bit longer to spool from vacuum in regular driving when you aren't trying to go fast.
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Old 01-05-2018, 10:15 AM   #404
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I built one of these QSV rotated kits for a customers WRX with 3576gtx, hopefully when he finishes his car we will have it on the dyno very soon and can do some testing!
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Old 01-06-2018, 12:02 AM   #405
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Originally Posted by blurred View Post
an s366 on a 2jz with cams, big exhaust, and pump gas (not ethanol) will spool on a dynapack at around 4500rpm, on a dynojet/street this will be around 4000rpm.

At his power level if he had flat torque as he stated he was making 375wtq, so a 175wtq increase from what a 2jz puts out a low rpm (2000-3000rpm) in vacuum (200wtq) it would fee like it spool instantly, at any rpm. Taking the valve out and making an instant 50whp more and the ability to make power to over 7500rpm would make the car infinitely faster and also feel snappier at low revs. It would just take a bit longer to spool from vacuum in regular driving when you aren't trying to go fast.
I had all the bolt ons including CAMs, big injectors and so on and so on. I was only running 15lbs of boost... I wanted something that I could take to a road course be fast out of the turns as well as a great daily driver. It was a good build that met an early demise due to a high pressure oil leak across the turbo manifold.

https://photos.app.goo.gl/ismuaFSBEP89ey3m2

https://photos.app.goo.gl/GvDiudDtQRBjPm8V2

https://photos.app.goo.gl/iGReDspZfogyWlV33

LoL havenít looked at these pic in a while... definitely some things I would do different today if I did it all over but Iíd still do the QSP again.

BTW I have the dyno graph stapled to my wall in my garage... if I remember when I get home in a few days, Iíll take a pic of of it post it.

Last edited by scotte30m3; 01-06-2018 at 12:10 AM.
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Old 01-11-2018, 08:42 PM   #406
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so a small update: I actually got into a wreck with the car, and I currently have all the parts (nothing was damaged other than the body) and will be swapping it into an RS. I really liked how the car felt with it at my power level.

I will be re doing the turbo kit, and it most likely will not have the spool valve, only for simplicities sake. I will talk with my fabricator about doing it again. I really want to. and it wont be my daily anymore so I will have more time to mess with it so I might. but we will see when the time comes. it definitely did work though for my setup: stock heads stock rev limit good mid range 62mm BW on 20 pounds
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Old 09-04-2018, 02:18 AM   #407
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Bumping an old thread from the dead because itís relevant.


I managed to find a prototype .92 ar twin scroll exhaust housing with an integrated quickspool flap for a efr 7163. I also have a new in box 7163 with normal single scroll exhaust housing.

I will be upgrading from my 6758 sooner or later to the 7163. My plan is to have a local fab shop make me a custom up pipe for it, then let my tuner try to make use of it.

The person I bought the prototype from said I should set the valve to no more then 2-4 psi or risk over spinning the turbo. I wonder if anyone else has had experience with this and if they have had similar experiences.

Iím hoping Clark tuner sees this and has more tips I can give to my tuner before messing with it.

If there are any other things I should know about this to pass along to my tuner I would love to hear it.

Thanks!
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Old 09-04-2018, 01:29 PM   #408
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I'm really surprised you found one of Borg's prototype housings!! Pics? I used to stare at early EFR prototypes but never saw those housings.

Anyway, with the spoolgate, I'd crack it in early too. Once you're making boost, the turbo is pretty much lit. Start bleeding the exhaust gas over. I'm assuming this is air solenoid actuated, like a wastegate..?

I'd almost treat this like a the ALS rocket, in that turbo RPM was a target for the mapping.
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Old 09-04-2018, 03:32 PM   #409
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Quote:
Originally Posted by Homemade WRX View Post
I'm really surprised you found one of Borg's prototype housings!! Pics? I used to stare at early EFR prototypes but never saw those housings.

Anyway, with the spoolgate, I'd crack it in early too. Once you're making boost, the turbo is pretty much lit. Start bleeding the exhaust gas over. I'm assuming this is air solenoid actuated, like a wastegate..?

I'd almost treat this like a the ALS rocket, in that turbo RPM was a target for the mapping.
Here are some pictures.





So you agree, keep it conservative at 2-4 psi. And when you say boost, 2-4 is boost, well it is out of vacuum at that point I guess. I was hoping not to have to spend more on a turbo speed sensor and gauge.


Do you think I should hook up a mbc to it for the tuner or is it easy enough to tweak the solenoid pressure on the solenoid itself?
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Old 09-05-2018, 05:16 AM   #410
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I think the first step would be to see how much pressure it takes to move the actuator on the spool valve. If that turns out to be 2-4psi, then all you need is a T fitting on the hose that runs from the compressor to the boost control solenoid.

If it takes more than ~4 psi, then you might want to shop around for an actuator that will open at a lower pressure.

I'm a little bummed to hear that these have to be opened at such a low pressure... I was hoping you could keep them shut until ~20 psi, and thus get full boost a few hundred RPM sooner. I'm still really interested in seeing how this turns out, though. If it opens at < 5psi, that seems like it would help with transient response, and maybe make large-ish turbos a little more fun to drive at cruising RPM (like 2500 or so).
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Old 09-05-2018, 12:11 PM   #411
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Originally Posted by NSFW View Post
I think the first step would be to see how much pressure it takes to move the actuator on the spool valve. If that turns out to be 2-4psi, then all you need is a T fitting on the hose that runs from the compressor to the boost control solenoid.

If it takes more than ~4 psi, then you might want to shop around for an actuator that will open at a lower pressure.

I'm a little bummed to hear that these have to be opened at such a low pressure... I was hoping you could keep them shut until ~20 psi, and thus get full boost a few hundred RPM sooner. I'm still really interested in seeing how this turns out, though. If it opens at < 5psi, that seems like it would help with transient response, and maybe make large-ish turbos a little more fun to drive at cruising RPM (like 2500 or so).
I think having it under 5 psi is specific to the efr turbos, because the wheel spins up so fast to begin with. Maybe not. Iíve never heard of an efr turbo being over spun before but that was the warning I was given.
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Old 09-05-2018, 02:12 PM   #412
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Quote:
Originally Posted by NSFW View Post
I'm a little bummed to hear that these have to be opened at such a low pressure... I was hoping you could keep them shut until ~20 psi, and thus get full boost a few hundred RPM sooner. I'm still really interested in seeing how this turns out, though. If it opens at < 5psi, that seems like it would help with transient response, and maybe make large-ish turbos a little more fun to drive at cruising RPM (like 2500 or so).
Nothing says you can't do that. I'd just be watching wheelspeed to see how close to the surge line and overspeeding I get.

Use data to not destroy your turbo
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Old 01-24-2020, 09:10 PM   #413
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Any update on the prototype turbo and its results? I think I am the perfect candidate for this product as I don't think I can fit a TS kit that is out there in an RS ....
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