Turbo OR Supercharger????

[SoccerBoy_AP]

Navy is absolutely right...TRD is completely to blame for the supercharger issues. Vortech didn't do anything wrong.
If you get the right fix it parts, you can make the s/c much more reliable and have good longevity from it.
tC Superchargers
Supercharged Scions

Pushing the envelope on the pulley side of the s/c with a good intercooler setup, bigger injectors and engine management will easily make a s/c compete with a turbo. However both will have to dump a lot more $ into the engine in order to not bend rods etc.

On the topic of the guy who made 311hp with a custom cam job... ever heard of Camcon? Camcon and a good FIC will do more then just swapping cams. Plus he only used water/meth, a full water to air intercooler will do more and allow higher boost levels, safely.

[navylife59]

Well, to throw a wrench in those works... I believe that a S/C tC can be built for way less and make about 270~280WHP. I am running 15lbs boost at redline with ONLY the stock ECM with the TRD reflash (this is critical), 550cc Deatschwerks injectors, 93 Octane, Walbro 255LPH (intake), full 2.5" exhaust (no cats though I would suggest one hi-flow for needed backpressure), modified TRD intake, Goodyear Gatorback belt, upgraded ceramic ball bearings (S/C) and upgraded high speed bearings (torque shaft), polished/smoothed scroll (compressor housing), 2.5" charge pipe w/ GReddy Type RS BPV, Okada Projects coilpacks, and 13-row oil cooler. That is it and nothing else, including piggyback management. I do have a GReddy Ultimate but it has not been hooked up for a year and a half. There is no FMIC and no water meth (never installed the latter).

I have driven it this way for over a year and a half with some driving in 105+F Texas heat. I will tell you that with this setup, power level fluctuates with OAT (Outside Air Temp). Below 50F it is a monster making about 270WHP. It is hard to tell on the old calibrated butt dyno with the clutch slipping and no LSD. 90F+ feels like I am making about 240~250WHP. 100F+ temps has the car still running smooth but with probably about 220~230WHP. The ECM retards timing at will so these are not definitive numbers, just approximations. Also as the power is pulled back, the benefit of the S/C decreases making it more of a load than a power adder.

You can read more about my setup and what I have went thru here, http://www.club-tc.com/forums/member...html#post39423 The following is what I would suggest for max power, bang for the buck, and reliability.
1. TRD S/C kit with TRD map reflash.
2. 550cc injectors - 440cc injectors (TRD) can be run safely to 10 PSI on 91 (mid-grade) Octane but over that would need 93 Octane. The ECM is programmed for the TRD supplied 440cc, therefore, the 550cc will make the motor run rich. This in itself is not what you want but is balanced by step 3.
3. Remove the TRD airbox from the "tuba" intake elbow. Replace with a 3" MAF housing and a high-end cone filter. This leans out the MAF which, in turn, allows the ECM to pull back some full enrichment and equal out the 550cc injectors. It will still be rich, but just enough for running higher boost levels; 10+PSI
4. Use a 2.5" hard charge pipe with a mounting flange of the BPV of your choice. The sequential "dual" BPV on the market should be OK but I have no experience with them.
5. Replace all of the torque (drive) shaft bearings with high-end, high-speed units. The Vortech S/C bearings do NOT have to be replaced. Those are designed to spin that unit up to 20PSI. Only switch to ceramic if you are looking for a quieter and slightly more efficient charger. http://www.club-tc.com/forums/forced...uild-kits.html
http://www.club-tc.com/forums/engine...-c-issues.html
6. Walbro 255LPH intake fuel pump. This upgrade is only needed if you step up to the 550cc injectors and boost 14PSI+. It is possible that as low as 12PSI might gain benefit at WOT and redline but that is uncertain. Be forewarned that there is no "drop-in" PNP fuel pump for the tC that I am currently aware of. All, including the Walbro, requires some slight modification or the wiring connector, the mounting cage and the rubber isolator. Not difficult if you have any skills whatsoever.
7. Water/Methanol injection for cooling the air charge. Compressed air heats at a given rate but a S/C does not have the added latent heat from a turbine section like a turbo. There is no PSI loss like the PSI drop across even the most efficient air-air and air-water intercoolers. Expect a 1~2PSI drop in pressure with an intercooler. Remember that the less efficient your S/C becomes at making power, the more of a load it becomes to the engine equating into even less power.
8. 2.5" exhaust; no more, no less. Run a 4-2-1 header which is the WeaponR. Run one catalytic converter (metal or high-flow) for needed backpressure. No backpressure will equate to sluggish throttle response for the low-mid RPM range. A straight thru muffler or a MagnaFlow type will provide the same performance but the MagnaFlow will give a little bit of backpressure (still beneficial) and better sound.
9. Efficient oil cooler. Spinning the S/C gearbox faster so this will help with the added friction generated heat.

For max efficiency you can replace the Vortech S/C bearings with ceramic ball high-speed units. You can also smooth and polish out the scroll in the compressor housing as it is a rough, tow-piece cast. You can also upgrade your coilpacks to for high RPM/high boost levels.

[ChippE]

i know everyone is going to say who the **** buys a turbo kit off ebay but seriously im thinkin about this one
TURBO KIT 04 05 06 07 08 S2000 F20C F22 SCION TC 2AZFE - eBay (item 280588176000 end time Dec-11-10 15:15:48 PST)

[hackattack16]

which do you guys think is better for a TC, turbo or supercharger? ?

[navylife59]

Mute point now there is no longer a S/C option in the market place. Unless you are going to custom build a S/C setup or can get an old TRD kit, turbo FTW.

[hackattack16]

we need to have a cincy meet sometime soon, to talk about all this in person haha on here it can get pretty confusing quick haha

[navylife59]

DO you mean Chin-cinati ? I would love to do a meet. Problem is, we are all so spread out. Finding a venue where enough of us will gather is difficult at best. What we need is a Scion Gumball Rally.

[RS1Tc]

Turbo>Supercharger.

[navylife59]

Why yes; in the basics of terms, a turbo is consider a engine supercharger.