low end toque

[Mikem53]

Originally Posted by Ian_FR-S

well thanks for the smart ass comments everyone, just asking if anyones got any mods to their frs that made more low end torque

there is no simple answer.. and its been discussed to death in other threads..
search and you shall find..

[ScionFrsFan]

Originally Posted by Bristecom

LOL, I should put a sticker on my tach that says "KEEP OUT" from 3-5k. Although, I should probably keep out above that too as evidently you can get knocking above 5k and damage your injectors...

Lol yeah I'm not sure how to drive the car anymore...I never heard of the knocking problem tho?

Someone made a good point that it's not a torque dip but a torque boost at 2800rpm lol that's a optimistic way of looking at it

[autobrz]

Originally Posted by Bristecom

LOL, I should put a sticker on my tach that says "KEEP OUT" from 3-5k. Although, I should probably keep out above that too as evidently you can get knocking above 5k and damage your injectors...

that is inaccurate info. its only risky to the injector seals if you shift fast at redline where u land above 5k after shifting

shift slower and u should be ok

[asnoir]

Hello. Since december 2011 i'm interesting by the new Hachi roku. You can't have port injection and direct injection between 3000 and 5000 rpm because the motor would overheat. I've seen a PDF from Toyota and it is said that the motor turn not enough quickly to refresh the combustion chamber. After 5000 rpm it turns very quickly and the exhaust valve open quickly to absorbe the heat. I think the D-4s system needs Toyota ingineers to be updated with Ecutek. The complexity from the system whith back pressure and injector heating is to complex for tuners. Toyota says that the injector could be damage by using DI and PI in the same time above 5000 rpm. The injectors could reach 150°C and overheat.

[asnoir]

Perhaps if you take an exhaust system without cat and racing header for highflow it could be good for refreshing the combustion chamber but it could lost torque because the back pressure will be poor. Look at the Griffon from TRD. It has got an oil cooler and on the front fender there is an exhaust air grille.