10/1/09
Since I've been doing a lot of towing lately sometimes over 12000ft passes, it would be nice to have some more grunt out of the trusty 3.4l. The best way to increase power is with a TRD Supercharger. There are two versions of the Supercharger but they are functionally the same. I found a used Gen1 unit on ebay for a great price. The TRD instructions are very good but apply to the Gen2. I have included several pdfs of the TRD files for your reference at the bottom.
Here are the connections that are slightly different for the Gen1 unit. On the right side there is a large vacuum port for the brakes. On the rear there is a straight port for the vacuum canister and a curved one for the PCV. Where the throttle body attaches is a small port for the throttle solenoid. If you have 4WD, use a T and connect the VSV line here too. At the top of the SC near the letter T is the boost port if you are connecting a gauge. Read the TRD supplement (really it was Gadget's find) below about how to connect the fuel pressure regulator to the boost signal to increase fuel pressure under boost. Otherwise plug the boost port if you aren't going to use it.
As far as other install tips, note that the power steering pulley has holes it in so you can stick a socket through to loosen the pivot. If you have an automatic transmission you may need to loosen the cable bracket under the truck to reach and you will need the proper bracket for the top of the SC. You may need some misc vacuum lines as the stock ones may not reach properly. It is extremely important that you install a check valve in the idle air control vacuum line per the instructions. This valve should block air flow towards the throttle body. You can order Toyota part PTR26-35042 or buy a brake vacuum booster check valve.
| You also cannot use the stock metal throttle body gasket as it will not seal properly. You need a paper one. You can buy them at http://www.urdusa.com or you can buy some gasket material and trace your own using the stock metal gasket. |  |
| Cut it round instead of D shaped like the metal one. Make sure to install it in the correct direction so the IAC vent is covered too. |  |
| The stock block manifold gasket can be reused if it has not been damaged. |  |
Here are some other things you may want to do with your install. Install colder spark plugs. Either Denso IK20, IK22 or NGK BKR6EIX11, BKR7EIX11. Stock is IK16 or BKR5. Tighten up the automatic transmission cable a bit to prevent High Gear Low RPM ping. You will see a drastic increase in bottom end torque from idle on up. Most setups will go lean near redline. If you are after performance and top end, see http://www.gadgetonline.com
You should also install a second automatic transmission cooler on the return line. I bought this Hayden unit. To install it you need to remove the grill. The grill is attached using seven clips that can be easily released from the center of each grill mount. Look inside and you will see a little tab that you flip down to release the clip. After releasing all seven. The grill will come off and the clips will still be attached to the truck. Remove the clips and reinstall them in the grill for reassembly.
Remove one horn and the cooler should fit over the bottom lip in the cross support. Drill a small hole through the vertical support and cooler for a self tapping screw. Before final mounting, attach the hoses and clamps with it out of the vehicle. Do not use the silly zip tie mounts that were included to mount the cooler to the AC condenser or radiator. Neither of these radiators is designed to support the weight of the cooler especially if you drive off road.
You may need some extra hose to reach and make sure you route them so they don't get pinched or cut. You will need 1-2 quarts of additional Dexron ATF. Use high octane fuel.
BELT P/N: 00602-176-20-026
Installation instructions:
TRD34LSCInstal.pdf
V6SuperchargerSup.pdf
7th_injector.pdf In case you buy this option to deter high rpm lean and ping.
Exemption Orders:
D-425-2.pdf
D-425-3.pdf
The Magnuson unit holds four ounces of oil and has a scheduled maintenance interval of 100K miles but should be done more often. GM SC oil used in the Pontiacs is the same as they also used Magnuson units. You have to remove the Gen1 SC for maintenance because it is mounted upside down.