Jackson Racing Supercharger Owners Thread

[tomm.brz]

a bypass valve is a blow off valve, when recirculated it s usually called bypass valve.. i think the website means quieter than a atmosphere vented bov, since it puts enfasis that it s recirculated

[PulsarBeeerz]

Originally Posted by JDMChris

It's not quieter than the standard Bypass Valve in the kit. It is quieter than a Blow Off Valve.

You didn't find it was quieter than the original?

[JDMChris]

Originally Posted by PulsarBeeerz

You didn't find it was quieter than the original?

I'm talking about the Jackson Racing one, not the one you are running.


Also, if the one you are running is quieter, you may not have the spring set properly.

[PulsarBeeerz]

Originally Posted by JDMChris

I'm talking about the Jackson Racing one, not the one you are running.


Also, if the one you are running is quieter, you may not have the spring set properly.

So you don't have the Jackson Racing one then?



Mine is set properly, the spring was swapped to a softer one as advised by the manufacture. The design is just quieter. I can make it louder by running 50/50 recirculating, but it get obnoxious.

[wheelhaus]

Is the BPV or SC actually emitting a high pitch squeal or whistle like a slipping belt? That may not be normal. Come to think of it, have you checked the belt? If you have a sound clip we can try to help diagnose what you're hearing, but its hard to say otherwise as everyone's perceptions and expectations are different.

I've used both the original plastic BPV and the newer aluminum one, and they sound about the same volume wise. Nothing has ever squealed, but the SC has a distinct mechanical whirring sound at idle. At mid-high rpm at partial or no throttle the BPV makes all sorts of shooshy wooshing sounds because the SC is forcing lots of air through the bypass circuit, but nothing whistles or squeals (except a faint high pitch zing at exactly 3100 rpm from something harmonic).

If its the sound of air moving or the SC itself that's annoying, I can't imagine a different BPV changing the sound a lot (unless it's actually whistling or doing something harmonic). The SC and bypass circuit is really short, just inches, and its only a few inches from the air filter so you're gonna hear everything going through there. If you had a longer inlet tube (imagine a traditional CAI that puts the air filter behind the bumper or in a wheel well), that would likely make it quieter by placing the air filter farther away. Wrapping the inlet tubing might help dampen it a bit, but with the air filter so close I don't know how much that would even help.

[wheelhaus]

Originally Posted by Teppka

It’s octane, not RON here in Turkey. I have access to 95 and 97 octane gasoline.

Originally Posted by tomm.brz

Are you sure?
i would be amazed at knowing that in ur whole country the minimum rating is 95 OCT (which could be something like 102-103 RON in american standards)
Also according to Wikipedia:
Turkey: 95 RON and 95+ RON widely available in gas stations. 91 RON (Regular) has been dropped in 2006. 98 and 100 RON (Shell V-Power Racing) has been dropped in late 2009. The Gas which has been advertised 97 RON has been dropped in 2014 and renamed 95+.

Originally Posted by Teppka

If you’re still interested in gas available in Turkey, my BRZ user manual reads that I have to use RON 98 gas which as I understand equals to 94 octane, and standard we have is 95 octane. So there is nothing extraordinary here. And as I mentioned 97 octane is also available as premium fuel.

I just stumbled across this part of the discussion from a couple months ago, and wanted to clear up a few things to avoid confusion.
RON is an octane rating, it stands for Research Octane Number.
MON is also an octane rating, it stands for Motor Octane Number.
OCT is just short for "octane."
RON and MON test methods are different, and extremely specific in how the tests are performed.

European countries and others around the world (including Turkey) use only the RON rating and call it "octane." America uses RON+MON and call it "AKI" for Anti Knock Index, but many people also just call it "octane." The numbers scale differently, but generally a RON only octane rating will have a higher number than a RON+MON (AKI) rating in the US. So, 95 RON octane rating in Europe is NOT the same as 95 AKI octane rating in the US.

For instance,
91 RON is low in Europe, and its roughly equivalent to 87 AKI in the US which is also considered low.

95 RON is equivalent to 91 AKI in the US. This is what California has to use for whatever reason, but also in Colorado 91 is considered premium because of our altitude (less air = less oxygen, so 91 at altitude is the same as 93 at sea level).

97-98 RON is equivalent to 93-94 AKI in the US. That's about as high as you can find at the pump station. This is typically what is required for high performance engines, and is typically the minimum that tuners rely on for consistency. If you live at high enough altitude, (where there is less oxygen) 91 AKI (95 RON) is sufficient for good tuning.

94 AKI and up in the US is rare, and typically only used by race shops, tracks, and specialty gas stations. Special race fuels can of course go even higher.

[tomm.brz]

yes, good info


anyway even if in theory 98 ron should match 93 aki, in practice Europe fuel is shittier and with identical configuration, 93 aki is more resistant even compared to our euro 100 Ron ( 100 ron is more diffused than 98 ron). Any car i tuned with 93 Aki, it handles leaner afr and higher timing than those here with 100 ron

[Ignore Your Doctor]

got her back from the dyno today, injectors, fuel pump, and flex fuel got us right to 360 at the wheel.

[Teppka]

Is it on stock engine? I mean internals. If yes aren’t you afraid to blow it up? Seems to be pretty high numbers.

[Breadman]

Originally Posted by Ignore Your Doctor

got her back from the dyno today, injectors, fuel pump, and flex fuel got us right to 360 at the wheel.

What headers? I would thought it wouldnt have rolled over so soon.

[PikachuBRZ]

Originally Posted by Ignore Your Doctor

car going to the dyno next week, we got jrsc high boost pulley, walbro 450 pump, id1050x injectors, delicious flex fuel kit, and a 4 bar map sensor.

excited to see what kind of numbers the car makes!

I'm curious why you swapped out the fuel pump. From what I've found the stock pump should support up to 450whp. Not trying to say you're wrong just trying to follow your logic. Also, have you done anything to strengthen your trans? You're knocking on that 300wtq number that seems to explode 4th.

[Ignore Your Doctor]

Originally Posted by Teppka

Is it on stock engine? I mean internals. If yes aren’t you afraid to blow it up? Seems to be pretty high numbers.

ive been running 300 at the wheels with the current setup for over 3 years. This was just the high boost pulley and flex fuel upgrades.

zero issues with internals aside from timing chain cover leaking a bit.

[Ignore Your Doctor]

Originally Posted by Breadman

What headers? I would thought it wouldnt have rolled over so soon.

JDL 4-2-1 EL headers into the JDL/Nameless combo pipe and a perrin 3" cbe. 2.75" at the header exit 3" rest of way back

[Ignore Your Doctor]

Originally Posted by PikachuBRZ

I'm curious why you swapped out the fuel pump. From what I've found the stock pump should support up to 450whp. Not trying to say you're wrong just trying to follow your logic. Also, have you done anything to strengthen your trans? You're knocking on that 300wtq number that seems to explode 4th.

e85 and was having some issues with the stock pump. running upgraded mounts and a stage 2 clutch kit from ACT + carbon fiber driveshaft. have done my TOB/fork already to new version