Hi guys, just purchased 2017 GSF this week. I wanted to look at options on increasing hp and torque. I think with the weight of our car, GSF does need a more hp and torque.
Is it possible to add another 75-80 HP and similar torque to our vehicle without adding supercharger or turbo?
Looking at changing the exhaust, intake and ECU tune.

I haven't found anyone that is offering ECU tune that is realistic to my target.

Any comments on this please??????

 

Yes agreed, the GSF definitely needs more Torque & maybe a bit more HP as well.

With a Full Exhaust & Tune maybe ~50 or so on the crank...

The only way to get more is adding a Super Charger with a Full system.

 

without a turbo/sc? 100 shot of NOS.

 

Agreed. This engine is pretty well pushed unless you are willing to take significant risks.

 

add some nos bro

 

Agree, for me the engine lacks low-end torque. However, having added the APexi throttle controller (RCF) improves the initial throttle response and torque feel. at low rpm.

However, check out the RCF forum as there are a few options on headers and superchargers, among them RR Racing: https://www.clublexus.com/forums/cl-...o-results.html

 

I have a different experience with the throttle response on the RCF. In Sport+ mode, the RCF throttle response is brutal. Engine break happens very hard at the slightest lift of the foot and jumped forward even with millimeter taps. Rolling into a turn in 1st gear at around 10 km/h and pushing the throttle easily swings the tail out (with TVD in track mode). One thing I noticed, it does vary with how much tire pressure you have especially on the rear tires. When I got the car, the tire pressures were set at 33 psi/33 psi cold/garage temperature. I played around with it and eventually settled on 37 psi rear/36 psi front to get the tirewall stiffness I wanted. With the rear end really stiffened up, the throttle response becomes more brutal because there is no "give" in the rear section. Those are just my observations, I guess.