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My 4Runner and Celica page
Engine Mods













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TRD Supercharger, Deckplate Mod with AMSOIL Filter, TRD Transmission Cooler.




























TRD Supercharger

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Deckplate mod w/Amsoil air filter

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TRD Transmission Cooler

 
 
 
TRD 160* Thermostat

 
 
Split Second TMC 1.1






The supercharger was one of my favorite modifications I have added to my 4Runner.  There is nothing better than adding 75 hp and 70 torque to your engine. 

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The TRD Supercharger on the 3.4L V6 is known to make the engine run lean.  This will cause pinging.  Being in Salt Lake City (4500 ft above sea level) I only have this problem occasionally.  To help prevent pinging, I did the Free FMU mod that Gadget recommends. 

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This mod is basically cutting a 4 inch hole in the front of your stock airbox.  The stock airbox has a tube that is routed above the tire, and behind the splash guard.  Its kind of a mini-snorkel, which is good for off-road but restrictive of on road use.  By cutting the hole, it allows air to flow easily into the engine. 
 
Once the hole was cut I added a deckplate (found at any marine shop) so if I take it off-road or need to close it up, i can just install the deckplate and it will be sealed.

 
 
 
 
 
If you have an automatic transmission and are supercharged or pull a trailer, I highly recommend installing a transmission cooler.  I decided to go with the TRD cooler, just because it has all of the mounting hardware made specially for the 4Runners.  I have heard that universal coolers are about half the price but I don't like how they are mounted using zip-ties.

 
I added the TRD thermostat to reduce the high-gear, low-rpm pinging.  I used a mixture of 60% water and 40% coolant with Redline's Water Wetter to help with the cooling.

 
 
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