TurboCustomz

Mostly because scion engines have pistons designed for low emission, high fuel economy. Therefore the ring lands are placed high on the piston. Therefore not being very well designed for large quantities of boost without failing in a relatively short period of time. Therefore creating large amounts of warranty work that Toyota would have to pay for. Therefore answering your question. But hey, what do I know? Nothing

Charles

JustAnotherAsian

but using these pulleys would void warranty like the pulleys for the 1mz-fe supercharger anywaiz right? so "warranty work" is somewhat out of the question...

do you think that the case is simply that toyota did not have a sure-fire way to blame your engine failure on your decision to run higher-compression pulleys (people swapping back into stock pulleys right before bringing it in for service)? so they decided to just scrap all other pulley setups so that we couldn't cheat our way into warranty work? that's what i think, hence the "tamper proof" cap.

(i don't know crap either. lol. all speculations.)

TurboCustomz

I would assume that would be the exact reason for the cap. Im suprised that they sell the S/C over the counter and dont insist that it be installed by a dealer to be covered. Especially with the reflash.

Charles

06tCguy

"higher-compression pulleys" lol

JustAnotherAsian

what is the technical term then? i thought since the the pulleys ultimately lead to higher compression...

DTRUONG_112

waiting for more updates ZPI.

jwaggz82

iTrader: (1)

shuttlegoosecock

any news???

dachmo

I don't know if there's a specific name for them. Higher boost pulleys? I just called them 7lb pulley, 10lb pulley, etc.

The pulleys only create higher pressure air before it reaches the cylinder. The compression has to do with how much the air is compressed by the piston once inside the cylinder.

Once the pressurized (boosted) air enters the cylinder and mixes with the fuel, the mixture is then compressed by the piston on the upward stroke before it is ignited.

^^^^^
corrections welcome

- Dante

TurboCustomz

Well, technically, you are both right. I tend to call them overdrive pullies personally. I guess its all preference.

Dante, the way you discribe compression is correct. However, a boost car has a static compression much higher then that of a NA car because you are forcing so much more air into the cylinder. More air = more compression. So technically you are both correct.

Charles

jmiller20874

Actually is does have to be installed by the dealer properly in order for your engine to remain under warranty. For those DIY'ers, if they have engine trouble caused by the S/C, they're S.O.L. The only thing warranted in a DIY install is the blower, just like any other TRD part.

TurboCustomz

Nice

nester

This totally depends on the dealer. The dealer doing the work has the final say on if they will do warranty work.

Some dealers are mod friendly, some are not. Know your dealer before you do any modifications.

TurboCustomz

Any major scion repairs have to be approved by a regional scion rep. Certian circumstances apply.

Charles

06tCguy

just in case you haven't seen... https://www.scionlife.com/forums/viewtopic.php?t=94397

boostedscion

those look great... high quality