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2UZFE Rods

13K views 4 replies 5 participants last post by  shall36  
I don't think the valve train should be a problem as their are no pushrods.

I would think, and anyone chime in on this, that the big problems associated with SC or turbo is the already high compression of the stock engine. With a stock CR in the 10:1 ballpark there isn't much room to play with boost before detonation causes big problems (like broken piston rings, flat-spots on the rod bearings, or broken connecting rods).

We've had several variations on this whole discussion and there seems to be several general conclusions:

1. The TRD supercharger provides a reasonable boost in horsepower/TQ, but not nearly as much as a well-developed aftermarket system installed on a purpose built short-block. The $4k will net you about 100 - 150 HP? Add to the $4k another $500 to have the trans valve body reworked by IPT (which is really mandatory for any serious mods).

2. Aftermarket superchargers and turbos can make big power, but only safely if you drop the CR via dished pistons or a very thick head gaskets. More time and effort required to do this and it will require a Unichip or one of the other "interceptor" type tuning modules. Basically, more power requires more fuel. The stock ECM can't keep up (at some point, neither can the stock fuel pump and injectors).

3. Stroke the motor to build power with cubes. Big time $$$ and the tuning issues are still there.


Bottom line is that there are no real big power add-ons that are true bolt-ons. The TRD SC is the closest thing to that. Its relatively low power output was designed into that system (my guess is) to keep from breaking the connecting rods and transmission. Most of the guys talking about big power out of these motors are not willing to spend the $10K+ to make that happen. Think about it, you can go buy a MKIII Supra AND hot rod it for less than $10K. You'll have one heck of a fast and fun car at a fraction of what you would have in a 4,500 pound truck that was never designed to go fast.