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Scion tC 1G Forced Induction Turbo and supercharger applications...

Bosch Turbo Bypass Valve for S/C

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Old Jul 30, 2009 | 01:16 AM
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Default Bosch Turbo Bypass Valve for S/C

I was looking into replacing the stock s/c bpv, and when doing a search I ran into this:

http://cgi.ebay.com/ebaymotors/Bosch...Q5fAccessories

Is it safe to use this, the 'low spring' is rated for 8-12 psi, would a lower psi (stock pulley) not open the valve, does it matter? I've noticed the Forge's soft spring is rated 5-15 psi, is that why this is recommended.

I have searched here on SL, and on the net for info on this, but this seller is the only place I can find this.
Old Jul 30, 2009 | 01:43 AM
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Originally Posted by kikcaffine
Official Supercharger Information Thread

General Info
Vortec V5 F-Trim
Straight cut spur gear
Fits engines up to 475 horsepower
Maximum airflow: 700 CFM *
Maximum boost pressure: 20 PSI *
Absolute maximum impeller speed: 65,000 RPM
Adiabatic efficiency: 76% **
Available with straight discharge and clockwise or counter clockwise rotation
Stock Injectors are 380cc
TRD Injectors are 410cc

BPV’s
Forge 007
TurboXS Type 25
Bosch 110
Any internally recirculating BOV
50/50 Hybrid’s- Forge Hybrid, Go Fast Bits hybrid, Ebay Dual Blow off with recirculating.


NO FULLY ATMOSPHERIC BLOW OFF VALVES- Will cause a lean setting when you shift, the MAF needs the air to recirculate back through it so it can get a proper reading.

Belts
Gates K070890
Use that one, the Goodyear Gatorback has a very bad tendency to slip
For use with the 9.5 Pound Pulley

Pulleys
NST 9.5 Pound Pulley
http://www.dezod.com/pd_nst_trd.cfm

Intakes
DO NOT USE WITH OUT A TUNE YOU WILL RUN LEAN
MMW Supercharger Intake
Umnitza Carbon Fiber Intake
Hybrid Cold Air Intake
ARC Cold Air Box

You can cut out the hydrocarbon filter that is on the top of the adapter that makes your airbox lid fit on the TRD supplied airbox bottom. Cutting this huge white screen out makes for about 1-2 WHP and increased throttle response.

Spark Plugs
The plug to use with the supercharger is the Denso Ik24 gapped to .040
Its 2 steps colder than stock and 1 step colder than TRD spec’d one

Rebuild Info
Bearings-
For the impeller shaft bearings
2 Nachi ball bearings nac-6003 (must be speed rated to 65000 RPM)

For the main input shaft bearings
2 SKF Ball Bearings 6205/C31

End Part / shaft assembly....
There are two end bearings part number 6205 2rs
Seals-
25-40-7 is the metric size of the shaft seal.. Timken part #222540


Taping Boost Gauge Line
Tap the line for the boost gauge rite after the Vac line from the throttle body, but before it gets to the T-Fitting for the ByPass Valve and you will get a much better reading.


Catch Can Related
On the intake manifold you have a traditional breather hose that comes off the valve cover into the intake manifold. And another into the intake. Cap off the manifold and route your breather line to a catch can or back into the intake "I prefer a catch can to keep the intake assembly clean and keep buildup from happening on your intake valves and ports." Also oil vapor lowers octane which can cause your engine to pull timing and then a loss of power if it senses knock". The best part about fixing these issues is you will gain throttle response and I gained around 1-1.5 psi across the board which means I was most likely leaking a small amount of boost back into the intake.

Turbo Timer-
I would reccomend getting a timer so it keeps your car running and cycles the way hot oil out of the supercharger. It takes about 10 minutes to install, and costs about 100 dollars for a new one. Or you can stay in your car for 30 seconds extra, either way your call.

Ecu Reflash-
It must get done, and it must get done at Toyota. Its not something every dealership can do, due to needing a special software tool. It is tuned very very conservatively and you can run a 9 or 9.5 pound pulley with no problems on the stock supercharger fuel map.
People have gotten about 230whp with the stock pulley though with just a retune on a Unichip Engine Management, so that’s always an option aswell.

Noises
Whine. The supercharger whines, it whines at idle, midthrottle, and under full throttle. It’s a fact of life and you need to accept that’s what it does. If you hear a put put put put noise at idle that’s the BPV getting stuck open.
Intake. If you get an intake you will hear your little BPV hiss whe your shift, that’s the only way to hear a hiss unless you get a Hybrid BPV.


Oil
Toyota recommends between 4.0-4.8 quarts of 5w30
I personally run about 4.5 quarts of 10w40 so it wont leak as easily because it’s a bit thicker than the 5w30

Boost Levels in HKPA via Digital Boost Gauge
-.58-.60 at idle in neutral (VAC)
-.70 coasting in gear (VAC)
.60 (8.7PSI at 6000rpm)
.62 (9.2PSI bouncing off rev limiter)


Install Manual
2005-2006 Supercharger Installation Manual
http://trdsparks.com/install/PTR01-21050-90inst.pdf
2007-
http://trdsparks.com/install/PTR41-21070inst.pdf


Part Numbers
TRD, Supercharger Compressor Housing Bracket Replacement Part PTR01-21054
TRD, Emblem, "Supercharged", Plastic Blister Type PTR01-3500E-MB
TRD, Emblem, Small Rectangular, Plastic Bubble Type PTR01-3500T-RD
TRD 2.4AZ S/C, Cold Plug Replacement Part PTR24-21050-00
TRD, Spark Plug PTR24-21055-01
TRD 2.4AZ S/C, Rear Bracket Replacement Part PTR25-21060
TRD 2AZ S/C, Drive Belt Replacement Part PTR30-21060
TRD 2.4AZ S/C, Wire Harness Relocation Kit Replacement Part PTR41-21050
TRD 2.4AZ S/C, Bracket Kit, AC Hose / Wire Harness Relocation Replacement Part PTR41-21051
TRD 2.4AZ S/C, Oil Feed Line T-Adaptor, AN to NPT Fitting, ByPass Valve Tee Replacement Part PTR41-21052
TRD 2.4AZ S/C, Idler Bracket Bolt w / Oil Return Line Hardware Kit Replacement Part PTR41-21053
TRD 2.4AZ S/C, Valve, Bypass Replacement Part PTR41-21054
TRD 2.4AZ S/C, Air Box Assy Kit Lower w/inlet Adaptor Replacement Part PTR41-21055
TRD 2.4AZ S/C, ECU Remap Module Replacement Part PTR41-21056
TRD 2.4AZ S/C, Crank Position Sensor Wire Ext. Assy. Replacement Part PTR41-21057
TRD 2.4AZ S/C, VSV Rubber Mount, VSV Hose & Bypass Valve Hose Kit Replacement Part PTR41-21058
TRD 2.4AZ S/C, Hose, Oil Feed Assy Replacement Part PTR41-21059
TRD 2.4AZ S/C, Rear Mounting Bracket, assembly, Aluminum Cast Replacement Part PTR41-21060
TRD 2.4AZ S/C, Crankshaft Bolt Replacement Part PTR41-21061
TRD 2.4AZ S/C, Idler Pulley Replacement Part PTR41-21062
TRD 2.4AZ S/C, Driven Pulley w/Hardware Kit Replacement Part PTR41-21063
TRD 2.4AZ S/C, Air Box Rubber Mounts & Sleeves Replacement Part PTR41-21064
TRD 2.4AZ S/C, Driven Pulley Shim Asst. Kit Replacement Part PTR41-21065
TRD 2.4AZ S/C, Clamp Kit Replacement Part PTR41-21066
TRD 2.4AZ S/C, Idler Pulley Hardware Kit Replacement Part PTR41-21067
TRD 2.4AZ S/C, Inlet Cover Replacement Part PTR41-21068
TRD 2.4AZ S/C, O-Ring, Supercharged tC Replacement Part PTR41-21069
TRD 2.4AZ S/C, Oil Pan w/ Return Tube Replacement Part PTR41-21160
TRD 2.4AZ S/C, Thermostat, 70C / 160F Replacement Part PTR41-21161
TRD 2.4AZ S/C, Formed Fuel Line Assembly Replacement Part PTR41-21162
TRD 2.4AZ S/C, Fuel Injectors, High-Flow Replacement Part PTR41-21163
TRD 2.4AZ S/C, Gasket, HC Trap Holder, Buna Replacement Part PTR41-21164
TRD 2.4AZ, Supercharger Main Assy. Replacement Part PTR41-21165
TRD 2.4AZ S/C, Insulator, Exhaust: Stamped Replacement Part PTR41-21166
TRD 2.4AZ S/C, Hose Kit: Inlet/Outlet/Bypass Replacement Part PTR41-21167
TRD 2.4AZ S/C, Hose, Water Return Replacement Part PTR41-21168
TRD 2.4AZ S/C, Oil Return Hard Line Assy. Replacement Part PTR41-21169
TRD 2.4AZ S/C, Rear Bracket & Inlet Cover Hardware Replacement Part PTR41-21170
Power Out Puts
~195 WHP for a 5speed stock
MAINTENANCE
Every 3k miles unscrew oil inlet nozzle and blow out with high pressure air in the direction of the screen (into the nozzle)
EVERY GAS FILL UP check your OIL level every time.


Rebuild INFO thread:
https://www.scionlife.com/forums/viewtopic.php?t=215404
I would go with one of these BPV's (The stuff in Red and underlined) . These are the most commonly used and work. Search them individually and I am sure it will bring up more info to guide your decision.
Old Jul 30, 2009 | 02:06 AM
  #3  
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Any internally recirculating BOV

Isn't this basically a BPV, btw I have read that entire thread, and some parts are outdated.

I saw this bosch made of aluminum, with adjustable springs (similar to the forge 007) for only $55, and wanted to see if anyone has tried it.
Old Jul 30, 2009 | 02:20 AM
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Yeah you should be Ok with that. If your running the stock pulley i dont see why it would make a difference though
Old Jul 30, 2009 | 04:01 AM
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it will run fine, i had one just like it, picked it up from frozenboost.com It made an annoying squeeling noise at times though.
Old Jul 30, 2009 | 01:34 PM
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Originally Posted by kikcaffine
Yeah you should be Ok with that. If your running the stock pulley i dont see why it would make a difference though
Well I have the stock 102 bpv on now, from what I read here it would make a difference for that part, and I will eventually upgrade the pulley. Thanks for the advice.
Old Aug 3, 2009 | 06:26 AM
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Y not an APR R1 diverter valve? Effortlessly holds boost, maintenance free, lifetime warranty, better design than spring units.
Old Aug 13, 2009 | 02:23 PM
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Where can you get these diverter valves?? How much?
Old Aug 13, 2009 | 02:24 PM
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I'm thinking it would probably work better than my 110 for the 9# I'm pushing.
Old Aug 13, 2009 | 04:00 PM
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Found the price on their site, $159- anyone know of a cheaper place?
Old Aug 13, 2009 | 04:00 PM
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Oh, and I couldn't find anything about how much pressure they'll hold.
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