My car won't go over 110. Every time I try, the RPM's drop. JDM Aristo motor. Any ideas on why and how to fix it?

 

You need either a Greddy or HKS speed cut module...Your basically reaching the the factory speed limiter from japan, like how the US cars are limited to 155mph, after the conversion its around 113mph...

Greddy
http://www.rhdjapan.com/trust-greddy...-slc-sld-23931

HKS
http://www.rhdjapan.com/hks-sld-spee...-type-ii-54295

 

thanks. wait, did u mean after the speed module my car's speed limit would be 113mph or 213mph?

 

Essentially all cars in Japan are restricted to ~110mph. Get what he mentioned for parts choices.

 

3 hp gain? miss print

 

113 is the typical claimed limit on these motors. Your speedo/tire size may interpret as 110mph. Once defeated you will have no electronic limitation to speed. The transmission's ratio, diff's ring/pinion ratio, tire size, and hp will dictate your top speed.

The jdm 161 aristo ecu uses the transmissions rear speed sensor to calculate when to enforce the limiter. So you need a device like the hks sld or other way to intercept and trick the ecu to think your not going that fast. This is not the same sensor that your speedo gets it reading from, that is actually from the wheels abs sensors, alternatively you can't just disconnect the trans speed sensor because the ecu uses that sensor as one of the signals it shifts gears by.

Some of the piggybacks out there will also allow you to intercept and skew the speed sensor reading. But if your all stock or bpu just buy the HKS SLD it's only a couple wires to hook up, easy stuff.

 

Thanks alot guys. Im gonna look into that ASAP.